Unit-test the eight trap effects against the C reference (closes #14) #37

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clawbot commented 2026-08-09 17:40:28 +02:00

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Closes #14.

trapHandlers had eight entries and zero direct tests, on the one
subsystem besides combat that can kill the hero outright. New
game/traps_test.go (19 tests, 15 subtests, 1140 lines) covers all eight
arms of move.c be_trapped, the prologue every trap runs through, and
the rust_armor tail T_RUST calls.

Test-only: no game code changed. git diff --stat against the branch
point is TODO.md plus one new test file.

Every expected value is transcribed from origin/c-master (move.c,
misc.c, fight.c, monsters.c, rogue.h) and the C is quoted in the
file. No divergence from C was found.

Rework pass 1. Two review findings, both addressed. The blocking
one — the claim that T_TELEP's mvaddch is not isolable — was
false, and it is gone from the test file, from TODO.md, and from
this body; mutation 18 is now caught by a new test. The minor one — the
"nothing else is untested" overclaim — is closed by covering the two
rust_armor predicates it missed. Details at the bottom.

First: the issue body's trap list was wrong

The definition of done listed "trapdoor, teleport, dart, sleeping gas,
bear trap, arrow, poison dart, rust". rogue.h 192-200 says otherwise:

T_DOOR 00  T_ARROW 01  T_SLEEP 02  T_BEAR 03
T_TELEP 04 T_DART 05   T_RUST 06   T_MYST 07   NTRAPS 8

There is no separate "poison dart" kind — T_DART is the poisoned
dart, its death message being "a poisoned dart killed you" — and the
list omitted T_MYST, the mystery trap, whose arm is an eleven-way
rnd(11) message switch. The work covers T_MYST in place of the
phantom second dart. Flagged on the issue before any code was written.

Per-trap: C effect and message vs. what is asserted

C arm	C effect	C message(s)	Asserted
prologue	on(player, ISLEVIT) returns T_RUST before anything else	none	TestSpringTrapWhileLevitatingDoesNothing: return value T_RUST, cell not revealed, running/count untouched, no HP change, generator untouched, no message
prologue	running = FALSE; count = FALSE; p_ch = TRAP; p_flags |= F_SEEN; returns tr	none	TestSpringTrapRecordsTheTrapAndStopsTheHero, one subtest per kind: glyph recorded, F_SEEN set, hero stopped, correct kind returned. This is item 2 of the DoD. T_DOOR excluded — new_level() wipes the cell straight after, so the record is unobservable for that one kind, which the file says
T_DOOR	level++; new_level()	"you fell into a trap!"	TestTrapDoorFallsToANewLevel: depth 3 -> 4, more than one map cell changed, staircase moved, hero re-placed, exact message
T_BEAR	no_move += BEARTIME (spread(3))	"you are caught in a bear trap"	TestTrapBearHoldsTheHero: no_move delta equals C's spread(3) replayed, generator untouched, exact message
T_SLEEP	no_command += SLEEPTIME (spread(5)); t_flags &= ~ISRUN	"a strange white mist envelops you and you fall asleep"	TestTrapSleepPutsTheHeroToSleep: no_command delta equals C's spread(5), generator untouched, Awake (= ISRUN, same 0o020000 bit) cleared, exact message
T_ARROW hit	swing(s_lvl - 1, s_arm, 1); s_hpt -= roll(1,6)	"oh no! An arrow shot you"	TestTrapArrowHitsTheHero, 100 trials: HP delta equals roll(1,6) replayed, exactly rnd(20) then rnd(6) spent, exact message. TestTrapArrowSwingsAtLevelMinusOne pins the minus one and s_arm
T_ARROW miss	new_item + init_weapon(ARROW), o_count = 1, o_pos = hero, fall()	"an arrow shoots past you"	TestTrapArrowMissesAndLandsOnTheFloor: no HP loss, a new ARROW object with o_count 1 on one of the eight squares around the hero, exact message
T_ARROW death	s_hpt <= 0 -> death('a')	"an arrow killed you"	not covered — see below
T_TELEP	teleport()	none	TestTrapTeleportMovesTheHeroAndDrawsTheTrap: hero relocated to a walkable square, the square he left shows ^, no_move reset to 0 by teleport()
T_TELEP	mvaddch(tc, TRAP)	none	TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto: sprung at a floor square next to the hero — the case Trap shape — the stepped-on square shows ^, which only this call can put there
T_DART miss	!swing(s_lvl + 1, s_arm, 1)	"a small dart whizzes by your ear and vanishes"	TestTrapDartMissesTheHero: no HP or strength change, only swing's rnd(20) spent, exact message. TestTrapDartSwingsAtLevelPlusOne pins the plus one — opposite sign to T_ARROW
T_DART hit	s_hpt -= roll(1,4); !ISWEARING(R_SUSTSTR) && !save(VS_POISON) -> chg_str(-1)	"a small dart just hit you in the shoulder"	TestTrapDartPoisonsTheHero, 60 trials, both save outcomes exercised: HP delta equals roll(1,4), strength -1 exactly when C's roll(1,20) >= 14 + 0 - lvl/2 fails, exactly three draws, exact message (C prints it either way)
T_DART ring	the && short-circuits before save	same	TestTrapDartSustainStrengthShortCircuitsTheSave: strength held, damage still taken, and two draws not three — a port that evaluated the save anyway would keep the strength but shift every later draw
T_DART death	s_hpt <= 0 -> death('d')	"a poisoned dart killed you"	not covered — see below
T_RUST	rust_armor(cur_armor)	"a gush of water hits you on the head", then rust_armor's	TestTrapRustSoaksTheHero, six rows: no armor / leather / o_arm already 9 (all three leave the gush as the last message, o_arm unchanged), plate mail o_arm 3 -> 4 with "your armor appears to be weaker now. Oh my!" and the terse "your armor weakens", and ISPROT holding at 3 with "the rust vanishes instantly"
T_RUST	(ISPROT) || ISWEARING(R_SUSTARM), and if (!to_death) around the message	"the rust vanishes instantly", or nothing	TestTrapRustHonoursTheRingAndTheToDeathFlag, two rows, no ISPROT anywhere so the ring is the only thing that can save the armor: o_arm held at 3 both times, message "the rust vanishes instantly" with to_death clear and the gush still standing as the last message with it set
T_RUST	the gush is printed before rust_armor	—	TestTrapRustAlwaysAnnouncesTheWater: with msg_esc set and the follow-up --More-- answered with ESCAPE, endmsg bails before drawing, so the message line still reads the gush
T_MYST	switch (rnd(11)), four arms drawing rainbow[rnd(cNCOLORS)]	eleven strings incl. C's "you pack turns %s!" typo	TestTrapMysteryMatchesTheCMessageSwitch, 400 trials: each trial recomputes C's string from the snapshotted generator, so the rnd(11) bound, the case numbering, every string, and the exact draw count per arm are pinned; all eleven arms are required to come up
table	eight arms, no default	—	TestTrapHandlersCoverEveryTrapKind: length is NTRAPS and every kind has a handler

Mutation results — 33 mutations, each reverted, all caught

Three were not caught on the first pass. That is the useful part of
the record, so all three are stated plainly rather than quietly fixed.

1. Deleting new_level() from T_DOOR left the suite green.
   be_trapped's own prologue stamps the trap glyph into the cell the
   hero fell through, so "the map is different afterwards" is true even
   with no new level dug. The test now counts differing cells —
   exactly one can change that way — and additionally requires the
   staircase to move and the hero to be re-placed. Re-run: caught.
2. roll(1,6) -> roll(1,5) on the arrow left the suite green.
   rnd(n) is "raw value % n", so one draw agrees between a d6 and a d5
   five times in six and leaves the generator in the same state either
   way. The single-shot replay could not separate them. The test is now
   a 100-trial sweep. Re-run: caught. The dart's roll(1,4) was already
   a sweep and did catch roll(1,3).
3. Deleting mvaddch(tc, TRAP) from T_TELEP left the suite green.
   The first pass concluded the line was redundant everywhere. That was
   wrong — it is redundant only when the trap is sprung under the hero.
   New TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto springs it at
   a square the hero is stepping onto. Re-run: caught. Full account under
   "Rework" below.

The same reasoning as (2) is why the swing arguments get their own
200-trial boundary sweeps: a forced hit and a forced miss cannot see a
wrong at_lvl or a dropped op_arm, because both arms are reachable at
any level and swing spends one rnd(20) regardless.

The remaining 30 each failed their own test and only their own:

#	Mutation	Failed
1	drop level++	TestTrapDoorFallsToANewLevel
2	drop new_level() (after fix)	TestTrapDoorFallsToANewLevel
3	"you fell into a trap!" -> no "!"	TestTrapDoorFallsToANewLevel
4	spread(3) -> spread(4)	TestTrapBearHoldsTheHero (+ TestAutoSaveOnSignalRacesTurnLoop)
5	bear message reworded	TestTrapBearHoldsTheHero
6	spread(5) -> spread(6)	TestTrapSleepPutsTheHeroToSleep
7	drop Flags.Clear(Awake)	TestTrapSleepPutsTheHeroToSleep
8	arrow s_lvl - 1 -> s_lvl	TestTrapArrowSwingsAtLevelMinusOne
9	roll(1,6) -> roll(1,5) (after fix)	TestTrapArrowHitsTheHero
10	dart roll(1,4) -> roll(1,3)	TestTrapDartPoisonsTheHero, ...SustainStrength...
11	dart s_lvl + 1 -> s_lvl	TestTrapDartSwingsAtLevelPlusOne
12	swap the && operands	TestTrapDartSustainStrengthShortCircuitsTheSave
13	drop chg_str(-1)	TestTrapDartPoisonsTheHero
14	dart hit message reworded	3 dart tests
15	dart miss message reworded	TestTrapDartMissesTheHero, ...SwingsAtLevelPlusOne
16	drop fall(arrow)	TestTrapArrowMissesAndLandsOnTheFloor
17	o_count = 1 -> 2	TestTrapArrowMissesAndLandsOnTheFloor
18	drop mvaddch(tc, TRAP) (after fix)	TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto
19	drop teleport()	TestTrapTeleportMovesTheHeroAndDrawsTheTrap
20	drop the gush message	TestTrapRustAlwaysAnnouncesTheWater + 3 rows
21	drop rust_armor()	TestTrapRustAlwaysAnnouncesTheWater + 3 rows (+ TestAutoSaveOnSignalRacesTurnLoop)
22	rnd(11) -> rnd(10)	TestTrapMysteryMatchesTheCMessageSwitch
23	fix C's "you pack" typo	TestTrapMysteryMatchesTheCMessageSwitch
24	drop the rainbow draw in case 4	TestTrapMysteryMatchesTheCMessageSwitch
25	drop p_flags |= F_SEEN	TestSpringTrapRecordsTheTrapAndStopsTheHero (7 of 7)
26	drop p_ch = TRAP	TestSpringTrapRecordsTheTrapAndStopsTheHero (7 of 7)
27	disable the ISLEVIT early return	TestSpringTrapWhileLevitatingDoesNothing
28	drop running/count reset	TestSpringTrapRecordsTheTrapAndStopsTheHero (6 of 7)
29	trapHandlers[T_RUST] = nil	TestTrapHandlersCoverEveryTrapKind + all 6 rust rows
30	"An arrow" -> "an arrow"	TestTrapArrowHitsTheHero, ...SwingsAtLevelMinusOne
31	arrow miss message reworded	TestTrapArrowMissesAndLandsOnTheFloor, ...SwingsAtLevelMinusOne
32	drop || ISWEARING(R_SUSTARM)	TestTrapRustHonoursTheRingAndTheToDeathFlag (both rows)
33	drop the if (!to_death) guard	TestTrapRustHonoursTheRingAndTheToDeathFlag (to_death row)

Every mutation failed fast (2-4s), never by timeout. The scripted
input carries an abort tail (space, then ESCAPE) precisely so a port that
started prompting where C does not fails on its assertion instead of
spinning on the headless terminal's filler input.

Mutations 4 and 21 also moved TestAutoSaveOnSignalRacesTurnLoop, which
drives real turns and is legitimately sensitive to BEARTIME and to
armor rusting. Not a specificity failure; noted for completeness.

Rework: T_TELEP's mvaddch is isolable, and the earlier claim was wrong

be_trapped takes a coordinate, and which coordinate decides whether
mvaddch(tc, TRAP) does anything. The first pass tested only one of the
two call sites and generalised from it.

• game/move.go 105-108 (case Floor) springs a trap under the hero and
  passes p.Pos. Here tc is the hero's square: the prologue has
  already set its p_ch to TRAP, and teleport() opens with
  mvaddch(hero, floor_at()) where floor_at() returns chat(hero), so
  the glyph is on screen before the line runs. Redundant — but only here.
• game/move.go 94-98 (case Trap) is the ordinary walk onto a hidden
  trap and passes nh, the square being stepped onto, with the hero
  still standing on the previous square. teleport()'s opening mvaddch
  paints that previous square, not tc; rooms.c leave_room writes
  blanks and never TRAP; and the case Trap arm returns before
  finishMove when the trap was a teleporter, so no look() follows —
  and look() only ever redraws the nine squares around the hero's new
  position anyway. g.mvaddch(tc.Y, tc.X, Trap) is the only writer,
  exactly as C's comment says.

TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto builds the second
shape: it picks a square next to the hero that is drawn as plain floor,
plants a T_TELEP trap there, and springs it. Measured under make test:

unmutated:                      screen at tc = '^'  -> passes
with mvaddch(tc, TRAP) deleted: screen at tc = '.'  -> fails

and with the line deleted nothing else in the suite fails — the
sibling TestTrapTeleportMovesTheHeroAndDrawsTheTrap stays green, which
is the direct demonstration that the two shapes differ. The "not
isolable" / "no reachable configuration" wording is deleted from
game/traps_test.go, from TODO.md, and from this body; each test now
says which of the two shapes it is and why.

No game code was changed: game/move.go is byte-identical to main.

Rework: the "nothing else is untested" overclaim

The previous body said "Nothing else in move.c be_trapped or
rust_armor is untested." That was not true of two rust_armor
predicates, so they are covered rather than the sentence merely softened.
TestTrapRustHonoursTheRingAndTheToDeathFlag puts R_SUSTARM on the
hero with no ISPROT on the armor, which is the only configuration
in which the ||'s right operand decides the branch, and runs it twice:

• to_death clear: o_arm held at 3, message "the rust vanishes
  instantly". Dropping the operand rusts the armor to 4 and prints "your
  armor appears to be weaker now. Oh my!" — mutation 32.
• to_death set: o_arm still held at 3, and the gush is still the last
  message because C suppresses the rust-vanishes line. Dropping the
  if (!to_death) guard prints it — mutation 33.

Left uncovered, and why

• "an arrow killed you" and "a poisoned dart killed you." Each is
  printed immediately before death(), which reaches myExit and
  os.Exit, so provoking either would take the test binary with it. The
  hero is pinned with fortify() and the damage rolls are checked by
  replaying C's arithmetic rather than by letting HP reach zero.
• Those two death messages are the only part of move.c be_trapped or
  rust_armor with no assertion.

Verification

• make check fully green (fmt-check, lint, test) on the amended
  commit, with GOFLAGS=-count=1 so the test run is genuinely executed
  and not served from cache:
  ok git.eeqj.de/sneak/rgoue/game 2.245s coverage: 62.3%.
• Mutation 18 re-run against the fixed test: fails
  TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto at
  traps_test.go:723 with "the square stepped onto shows '.', want the
  TRAP glyph '^'", and nothing else in the suite fails. Mutations 32 and
  33 likewise each fail only their own subtests. All three lines restored
  afterwards; git diff against main contains no game/move.go hunk.
• golangci-lint: 0 issues, run with a private empty
  GOLANGCI_LINT_CACHE; no "parallel golangci-lint is running", and no
  reported path outside the worktree. The gomodguard deprecation
  warning is #29 and is not
  addressed here.
• Package coverage on the branch point (bf820e3, before the sticks
  tests landed) went 56.2% -> 57.9%; on top of current main the
  package reads 62.3%.
• .golangci.yml untouched — sha256 still
  021cc83f4e6fc7c31b95b34b846723dfcf20b66b7baeea1dc40406e643346bcb.
• Nothing under game/testdata/ touched; TestSeedCompatItemTables
  green. The tests add no RNG call to any game path — they only read the
  generator through snapshots.
• t.Parallel() on every test and subtest; the approved
  //nolint:testpackage header is present.
• Still one commit, still fast-forwardable onto main @ c0741ad;
  git diff --check clean.

Closes https://git.eeqj.de/sneak/rgoue/issues/14. `trapHandlers` had eight entries and **zero** direct tests, on the one subsystem besides combat that can kill the hero outright. New `game/traps_test.go` (19 tests, 15 subtests, 1140 lines) covers all eight arms of `move.c be_trapped`, the prologue every trap runs through, and the `rust_armor` tail `T_RUST` calls. Test-only: **no game code changed.** `git diff --stat` against the branch point is `TODO.md` plus one new test file. Every expected value is transcribed from `origin/c-master` (`move.c`, `misc.c`, `fight.c`, `monsters.c`, `rogue.h`) and the C is quoted in the file. **No divergence from C was found.** > **Rework pass 1.** Two review findings, both addressed. The blocking > one — the claim that `T_TELEP`'s `mvaddch` is not isolable — was > **false**, and it is gone from the test file, from `TODO.md`, and from > this body; mutation 18 is now caught by a new test. The minor one — the > "nothing else is untested" overclaim — is closed by covering the two > `rust_armor` predicates it missed. Details at the bottom. ## First: the issue body's trap list was wrong The definition of done listed "trapdoor, teleport, dart, sleeping gas, bear trap, arrow, poison dart, rust". `rogue.h` 192-200 says otherwise: T_DOOR 00 T_ARROW 01 T_SLEEP 02 T_BEAR 03 T_TELEP 04 T_DART 05 T_RUST 06 T_MYST 07 NTRAPS 8 There is no separate "poison dart" kind — `T_DART` **is** the poisoned dart, its death message being "a poisoned dart killed you" — and the list omitted `T_MYST`, the mystery trap, whose arm is an eleven-way `rnd(11)` message switch. The work covers `T_MYST` in place of the phantom second dart. Flagged on the issue before any code was written. ## Per-trap: C effect and message vs. what is asserted | C arm | C effect | C message(s) | Asserted | | --- | --- | --- | --- | | prologue | `on(player, ISLEVIT)` returns `T_RUST` before anything else | none | `TestSpringTrapWhileLevitatingDoesNothing`: return value `T_RUST`, cell **not** revealed, `running`/`count` untouched, no HP change, generator untouched, no message | | prologue | `running = FALSE; count = FALSE; p_ch = TRAP; p_flags \|= F_SEEN`; returns `tr` | none | `TestSpringTrapRecordsTheTrapAndStopsTheHero`, one subtest per kind: glyph recorded, `F_SEEN` set, hero stopped, correct kind returned. This is item 2 of the DoD. `T_DOOR` excluded — `new_level()` wipes the cell straight after, so the record is unobservable for that one kind, which the file says | | `T_DOOR` | `level++; new_level()` | "you fell into a trap!" | `TestTrapDoorFallsToANewLevel`: depth 3 -> 4, **more than one** map cell changed, staircase moved, hero re-placed, exact message | | `T_BEAR` | `no_move += BEARTIME` (`spread(3)`) | "you are caught in a bear trap" | `TestTrapBearHoldsTheHero`: `no_move` delta equals C's `spread(3)` replayed, generator **untouched**, exact message | | `T_SLEEP` | `no_command += SLEEPTIME` (`spread(5)`); `t_flags &= ~ISRUN` | "a strange white mist envelops you and you fall asleep" | `TestTrapSleepPutsTheHeroToSleep`: `no_command` delta equals C's `spread(5)`, generator untouched, `Awake` (= `ISRUN`, same `0o020000` bit) cleared, exact message | | `T_ARROW` hit | `swing(s_lvl - 1, s_arm, 1)`; `s_hpt -= roll(1,6)` | "oh no! An arrow shot you" | `TestTrapArrowHitsTheHero`, 100 trials: HP delta equals `roll(1,6)` replayed, exactly `rnd(20)` then `rnd(6)` spent, exact message. `TestTrapArrowSwingsAtLevelMinusOne` pins the **minus one** and `s_arm` | | `T_ARROW` miss | `new_item` + `init_weapon(ARROW)`, `o_count = 1`, `o_pos = hero`, `fall()` | "an arrow shoots past you" | `TestTrapArrowMissesAndLandsOnTheFloor`: no HP loss, a new `ARROW` object with `o_count` 1 on one of the eight squares around the hero, exact message | | `T_ARROW` death | `s_hpt <= 0` -> `death('a')` | "an arrow killed you" | **not covered** — see below | | `T_TELEP` | `teleport()` | none | `TestTrapTeleportMovesTheHeroAndDrawsTheTrap`: hero relocated to a walkable square, the square he left shows `^`, `no_move` reset to 0 by `teleport()` | | `T_TELEP` | `mvaddch(tc, TRAP)` | none | `TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto`: sprung at a floor square **next to** the hero — the `case Trap` shape — the stepped-on square shows `^`, which only this call can put there | | `T_DART` miss | `!swing(s_lvl + 1, s_arm, 1)` | "a small dart whizzes by your ear and vanishes" | `TestTrapDartMissesTheHero`: no HP or strength change, only swing's `rnd(20)` spent, exact message. `TestTrapDartSwingsAtLevelPlusOne` pins the **plus one** — opposite sign to `T_ARROW` | | `T_DART` hit | `s_hpt -= roll(1,4)`; `!ISWEARING(R_SUSTSTR) && !save(VS_POISON)` -> `chg_str(-1)` | "a small dart just hit you in the shoulder" | `TestTrapDartPoisonsTheHero`, 60 trials, both save outcomes exercised: HP delta equals `roll(1,4)`, strength -1 exactly when C's `roll(1,20) >= 14 + 0 - lvl/2` fails, exactly three draws, exact message (C prints it either way) | | `T_DART` ring | the `&&` short-circuits before `save` | same | `TestTrapDartSustainStrengthShortCircuitsTheSave`: strength held, damage still taken, and **two** draws not three — a port that evaluated the save anyway would keep the strength but shift every later draw | | `T_DART` death | `s_hpt <= 0` -> `death('d')` | "a poisoned dart killed you" | **not covered** — see below | | `T_RUST` | `rust_armor(cur_armor)` | "a gush of water hits you on the head", then rust_armor's | `TestTrapRustSoaksTheHero`, six rows: no armor / leather / `o_arm` already 9 (all three leave the gush as the last message, `o_arm` unchanged), plate mail `o_arm` 3 -> 4 with "your armor appears to be weaker now. Oh my!" and the terse "your armor weakens", and `ISPROT` holding at 3 with "the rust vanishes instantly" | | `T_RUST` | `(ISPROT) \|\| ISWEARING(R_SUSTARM)`, and `if (!to_death)` around the message | "the rust vanishes instantly", or nothing | `TestTrapRustHonoursTheRingAndTheToDeathFlag`, two rows, no `ISPROT` anywhere so the ring is the only thing that can save the armor: `o_arm` held at 3 both times, message "the rust vanishes instantly" with `to_death` clear and the gush still standing as the last message with it set | | `T_RUST` | the gush is printed **before** `rust_armor` | — | `TestTrapRustAlwaysAnnouncesTheWater`: with `msg_esc` set and the follow-up `--More--` answered with ESCAPE, `endmsg` bails before drawing, so the message line still reads the gush | | `T_MYST` | `switch (rnd(11))`, four arms drawing `rainbow[rnd(cNCOLORS)]` | eleven strings incl. C's "you pack turns %s!" typo | `TestTrapMysteryMatchesTheCMessageSwitch`, 400 trials: each trial recomputes C's string from the snapshotted generator, so the `rnd(11)` bound, the case numbering, every string, and the exact draw count per arm are pinned; all eleven arms are required to come up | | table | eight arms, no `default` | — | `TestTrapHandlersCoverEveryTrapKind`: length is `NTRAPS` and every kind has a handler | ## Mutation results — 33 mutations, each reverted, all caught **Three were not caught on the first pass.** That is the useful part of the record, so all three are stated plainly rather than quietly fixed. 1. **Deleting `new_level()` from `T_DOOR` left the suite green.** `be_trapped`'s own prologue stamps the trap glyph into the cell the hero fell through, so "the map is different afterwards" is true even with no new level dug. The test now **counts** differing cells — exactly one can change that way — and additionally requires the staircase to move and the hero to be re-placed. Re-run: caught. 2. **`roll(1,6)` -> `roll(1,5)` on the arrow left the suite green.** `rnd(n)` is "raw value % n", so one draw agrees between a d6 and a d5 five times in six *and leaves the generator in the same state either way*. The single-shot replay could not separate them. The test is now a 100-trial sweep. Re-run: caught. The dart's `roll(1,4)` was already a sweep and did catch `roll(1,3)`. 3. **Deleting `mvaddch(tc, TRAP)` from `T_TELEP` left the suite green.** The first pass concluded the line was redundant everywhere. That was wrong — it is redundant only when the trap is sprung under the hero. New `TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto` springs it at a square the hero is stepping onto. Re-run: caught. Full account under "Rework" below. The same reasoning as (2) is why the swing arguments get their own 200-trial boundary sweeps: a forced hit and a forced miss cannot see a wrong `at_lvl` or a dropped `op_arm`, because both arms are reachable at any level and `swing` spends one `rnd(20)` regardless. The remaining 30 each failed their own test and only their own: | # | Mutation | Failed | | --- | --- | --- | | 1 | drop `level++` | `TestTrapDoorFallsToANewLevel` | | 2 | drop `new_level()` (after fix) | `TestTrapDoorFallsToANewLevel` | | 3 | "you fell into a trap!" -> no "!" | `TestTrapDoorFallsToANewLevel` | | 4 | `spread(3)` -> `spread(4)` | `TestTrapBearHoldsTheHero` (+ `TestAutoSaveOnSignalRacesTurnLoop`) | | 5 | bear message reworded | `TestTrapBearHoldsTheHero` | | 6 | `spread(5)` -> `spread(6)` | `TestTrapSleepPutsTheHeroToSleep` | | 7 | drop `Flags.Clear(Awake)` | `TestTrapSleepPutsTheHeroToSleep` | | 8 | arrow `s_lvl - 1` -> `s_lvl` | `TestTrapArrowSwingsAtLevelMinusOne` | | 9 | `roll(1,6)` -> `roll(1,5)` (after fix) | `TestTrapArrowHitsTheHero` | | 10 | dart `roll(1,4)` -> `roll(1,3)` | `TestTrapDartPoisonsTheHero`, `...SustainStrength...` | | 11 | dart `s_lvl + 1` -> `s_lvl` | `TestTrapDartSwingsAtLevelPlusOne` | | 12 | swap the `&&` operands | `TestTrapDartSustainStrengthShortCircuitsTheSave` | | 13 | drop `chg_str(-1)` | `TestTrapDartPoisonsTheHero` | | 14 | dart hit message reworded | 3 dart tests | | 15 | dart miss message reworded | `TestTrapDartMissesTheHero`, `...SwingsAtLevelPlusOne` | | 16 | drop `fall(arrow)` | `TestTrapArrowMissesAndLandsOnTheFloor` | | 17 | `o_count = 1` -> 2 | `TestTrapArrowMissesAndLandsOnTheFloor` | | 18 | drop `mvaddch(tc, TRAP)` (after fix) | `TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto` | | 19 | drop `teleport()` | `TestTrapTeleportMovesTheHeroAndDrawsTheTrap` | | 20 | drop the gush message | `TestTrapRustAlwaysAnnouncesTheWater` + 3 rows | | 21 | drop `rust_armor()` | `TestTrapRustAlwaysAnnouncesTheWater` + 3 rows (+ `TestAutoSaveOnSignalRacesTurnLoop`) | | 22 | `rnd(11)` -> `rnd(10)` | `TestTrapMysteryMatchesTheCMessageSwitch` | | 23 | fix C's "you pack" typo | `TestTrapMysteryMatchesTheCMessageSwitch` | | 24 | drop the rainbow draw in case 4 | `TestTrapMysteryMatchesTheCMessageSwitch` | | 25 | drop `p_flags \|= F_SEEN` | `TestSpringTrapRecordsTheTrapAndStopsTheHero` (7 of 7) | | 26 | drop `p_ch = TRAP` | `TestSpringTrapRecordsTheTrapAndStopsTheHero` (7 of 7) | | 27 | disable the `ISLEVIT` early return | `TestSpringTrapWhileLevitatingDoesNothing` | | 28 | drop `running`/`count` reset | `TestSpringTrapRecordsTheTrapAndStopsTheHero` (6 of 7) | | 29 | `trapHandlers[T_RUST] = nil` | `TestTrapHandlersCoverEveryTrapKind` + all 6 rust rows | | 30 | "An arrow" -> "an arrow" | `TestTrapArrowHitsTheHero`, `...SwingsAtLevelMinusOne` | | 31 | arrow miss message reworded | `TestTrapArrowMissesAndLandsOnTheFloor`, `...SwingsAtLevelMinusOne` | | 32 | drop `\|\| ISWEARING(R_SUSTARM)` | `TestTrapRustHonoursTheRingAndTheToDeathFlag` (both rows) | | 33 | drop the `if (!to_death)` guard | `TestTrapRustHonoursTheRingAndTheToDeathFlag` (`to_death` row) | Every mutation failed **fast** (2-4s), never by timeout. The scripted input carries an abort tail (space, then ESCAPE) precisely so a port that started prompting where C does not fails on its assertion instead of spinning on the headless terminal's filler input. Mutations 4 and 21 also moved `TestAutoSaveOnSignalRacesTurnLoop`, which drives real turns and is legitimately sensitive to `BEARTIME` and to armor rusting. Not a specificity failure; noted for completeness. ## Rework: `T_TELEP`'s `mvaddch` is isolable, and the earlier claim was wrong `be_trapped` takes a coordinate, and **which** coordinate decides whether `mvaddch(tc, TRAP)` does anything. The first pass tested only one of the two call sites and generalised from it. - `game/move.go` 105-108 (`case Floor`) springs a trap under the hero and passes `p.Pos`. Here `tc` **is** the hero's square: the prologue has already set its `p_ch` to `TRAP`, and `teleport()` opens with `mvaddch(hero, floor_at())` where `floor_at()` returns `chat(hero)`, so the glyph is on screen before the line runs. Redundant — but only here. - `game/move.go` 94-98 (`case Trap`) is the ordinary walk onto a hidden trap and passes `nh`, the square being stepped **onto**, with the hero still standing on the previous square. `teleport()`'s opening `mvaddch` paints that previous square, not `tc`; `rooms.c leave_room` writes blanks and never `TRAP`; and the `case Trap` arm returns before `finishMove` when the trap was a teleporter, so no `look()` follows — and `look()` only ever redraws the nine squares around the hero's new position anyway. `g.mvaddch(tc.Y, tc.X, Trap)` is the **only** writer, exactly as C's comment says. `TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto` builds the second shape: it picks a square next to the hero that is drawn as plain floor, plants a `T_TELEP` trap there, and springs it. Measured under `make test`: unmutated: screen at tc = '^' -> passes with mvaddch(tc, TRAP) deleted: screen at tc = '.' -> fails and with the line deleted **nothing else in the suite fails** — the sibling `TestTrapTeleportMovesTheHeroAndDrawsTheTrap` stays green, which is the direct demonstration that the two shapes differ. The "not isolable" / "no reachable configuration" wording is deleted from `game/traps_test.go`, from `TODO.md`, and from this body; each test now says which of the two shapes it is and why. No game code was changed: `game/move.go` is byte-identical to `main`. ## Rework: the "nothing else is untested" overclaim The previous body said "Nothing else in `move.c be_trapped` or `rust_armor` is untested." That was not true of two `rust_armor` predicates, so they are covered rather than the sentence merely softened. `TestTrapRustHonoursTheRingAndTheToDeathFlag` puts `R_SUSTARM` on the hero with **no** `ISPROT` on the armor, which is the only configuration in which the `||`'s right operand decides the branch, and runs it twice: - `to_death` clear: `o_arm` held at 3, message "the rust vanishes instantly". Dropping the operand rusts the armor to 4 and prints "your armor appears to be weaker now. Oh my!" — mutation 32. - `to_death` set: `o_arm` still held at 3, and the gush is still the last message because C suppresses the rust-vanishes line. Dropping the `if (!to_death)` guard prints it — mutation 33. ## Left uncovered, and why - **"an arrow killed you" and "a poisoned dart killed you."** Each is printed immediately before `death()`, which reaches `myExit` and `os.Exit`, so provoking either would take the test binary with it. The hero is pinned with `fortify()` and the damage rolls are checked by replaying C's arithmetic rather than by letting HP reach zero. - Those two death messages are the only part of `move.c be_trapped` or `rust_armor` with no assertion. ## Verification - `make check` fully green (`fmt-check`, `lint`, `test`) on the amended commit, with `GOFLAGS=-count=1` so the test run is genuinely executed and not served from cache: `ok git.eeqj.de/sneak/rgoue/game 2.245s coverage: 62.3%`. - Mutation 18 re-run against the fixed test: **fails** `TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto` at `traps_test.go:723` with "the square stepped onto shows '.', want the TRAP glyph '^'", and nothing else in the suite fails. Mutations 32 and 33 likewise each fail only their own subtests. All three lines restored afterwards; `git diff` against `main` contains no `game/move.go` hunk. - `golangci-lint`: **0 issues**, run with a private empty `GOLANGCI_LINT_CACHE`; no "parallel golangci-lint is running", and no reported path outside the worktree. The `gomodguard` deprecation warning is https://git.eeqj.de/sneak/rgoue/issues/29 and is not addressed here. - Package coverage on the branch point (`bf820e3`, before the sticks tests landed) went 56.2% -> 57.9%; on top of current `main` the package reads 62.3%. - `.golangci.yml` untouched — sha256 still `021cc83f4e6fc7c31b95b34b846723dfcf20b66b7baeea1dc40406e643346bcb`. - Nothing under `game/testdata/` touched; `TestSeedCompatItemTables` green. The tests add no RNG call to any game path — they only read the generator through snapshots. - `t.Parallel()` on every test and subtest; the approved `//nolint:testpackage` header is present. - Still one commit, still fast-forwardable onto `main` @ `c0741ad`; `git diff --check` clean.

clawbot added 1 commit 2026-08-09 17:40:28 +02:00

Unit-test the eight trap effects against the C reference (closes #14) ... b0f96fac28

`trapHandlers` had eight entries and zero direct tests, on the one
subsystem besides combat that can kill the hero outright. New
`game/traps_test.go` covers all eight arms of `move.c be_trapped`, the
prologue every trap runs through, and the `rust_armor` tail `T_RUST`
calls. Test-only: no game code changes.

Every expected value is transcribed from `origin/c-master` (`move.c`,
`misc.c`, `fight.c`, `monsters.c`, `rogue.h`) and quoted in the file. No
divergence from C was found.

The trap set is `rogue.h` 192-200: there is no separate "poison dart"
kind — `T_DART` is the poisoned dart — and `T_MYST`, the eleven-way
`rnd(11)` message switch, is the eighth. Details the tests are built
around: `BEARTIME`/`SLEEPTIME` are `spread(3)`/`spread(5)`, both of which
reduce to `rnd(0)` and so cost no random number, which is asserted as
well as their values; `T_ARROW` swings at `s_lvl - 1` and `T_DART` at
`s_lvl + 1`; and the strength loss is gated on `!ISWEARING(R_SUSTSTR) &&
!save(VS_POISON)`, whose short circuit means the ring saves a random draw
as well as the strength.

Damage dice and swing arguments are checked by sweeps rather than single
shots: `rnd(n)` is "raw value % n", so one draw cannot separate a d6 from
a d5, and a forced hit or miss cannot see a wrong `at_lvl`. Both shapes
were forced by mutation runs that the single-shot versions survived.

The two death messages are deliberately uncovered: each is printed
immediately before `death()`, which reaches `myExit` and `os.Exit`, so
provoking either would kill the test binary. The hero is pinned with
`fortify()` and the damage is checked by replaying C's arithmetic.

clawbot added the needs-review label 2026-08-09 17:40:36 +02:00

clawbot self-assigned this 2026-08-09 17:40:37 +02:00

clawbot referenced this pull request 2026-08-09 17:40:56 +02:00

Unit test coverage: traps (all 8 trapHandlers entries untested) #14

clawbot commented 2026-08-09 17:53:22 +02:00

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Review of #37 — FAIL (needs-rework)

One blocking finding. Everything else in the standard gate passes.

Blocking: the "T_TELEP's mvaddch is not isolable" claim is false, and the gap it excuses is real

game/traps_test.go 619-634, TODO.md 121-128, and the PR body all state that
trapTeleport's g.mvaddch(tc.Y, tc.X, Trap) (game/move.go 411) is redundant
in C and in the port, and that "no reachable configuration makes deleting it
observable". That is wrong, and the counter-example is the path the game
actually takes.

move.c be_trapped / springTrap is called two ways. game/move.go 105-108
(case Floor) passes p.Pos — the hero's own square — which is the shape
TestTrapTeleportMovesTheHeroAndDrawsTheTrap uses (traps_test.go 639:
pos := g.Player.Pos). In that shape the claim holds: teleport() opens with
mvaddch(hero, floor_at()) (game/wizard.go 221, wizard.c 204) and
floor_at() returns chat(hero), which the prologue has just set to TRAP, so
the glyph is already on screen.

But the ordinary "walk onto a hidden trap" path is game/move.go 94-98
(case Trap), which passes nh — the square being stepped onto — while the
hero is still standing on the previous square. There teleport()'s opening
mvaddch paints the hero's old square, not tc; the screen at tc still shows
the FLOOR lie, and leave_room (rooms.c) does not write TRAP either. The
mvaddch(tc, TRAP) is the only thing that puts the glyph there — exactly what
the C comment says. C behaves the same way; this is not a port defect.

Reproduced, both runs under make test on the PR head, with a scratch probe
that springs a T_TELEP trap at an adjacent in-room square instead of the
hero's own:

unmutated:                      screen at tc = '^'
with mvaddch(tc, TRAP) deleted: screen at tc = '.'  -> probe fails

So the line is isolable, mutation 18 is a genuine coverage gap rather than an
unavoidable one, and the "not isolable" statement is now recorded in TODO.md,
i.e. in project memory. MEMORY.md is explicit that false claims of this kind
must not be re-landed.

Acceptable: spring the teleport trap at a square that is not the hero's
position (mirroring moveEnter's case Trap), assert the stepped-on square
shows ^ there, and delete the "not isolable" / "no reachable configuration"
wording from game/traps_test.go 619-634, TODO.md, and the PR body. If a
claim about redundancy is kept at all, scope it to the springTrap(p.Pos)
shape.

Minor: the "nothing else is untested" claim overreaches

The PR body says "Nothing else in move.c be_trapped or rust_armor is
untested." Two rust_armor predicates have no assertion: the
|| ISWEARING(R_SUSTARM) operand and the if (!to_death) message suppression
(game/move.go 489-491). Covering them is optional — dropping the sentence, or
listing them alongside the two death messages, is not.

Adjudicated in the author's favour

• The trap list in #14 is wrong; the
  author is right. rogue.h 192-200 is T_DOOR/T_ARROW/T_SLEEP/T_BEAR/
  T_TELEP/T_DART/T_RUST/T_MYST, NTRAPS 8. There is no second "poison
  dart" kind — T_DART is it ("a poisoned dart killed you", move.c) — and
  T_MYST was omitted. Working the issue as written would have produced
  coverage of a trap that does not exist while leaving a real arm untested.
• Both first-pass misses are genuinely closed. Deleting g.NewLevel() from
  trapFall now fails TestTrapDoorFallsToANewLevel (the one-cell reasoning is
  sound: with NewLevel gone, only the prologue's own pp.Ch/FSeen write
  touches Level.Places, which is a value array, so changed is exactly 1);
  roll(1,6) -> roll(1,5) now fails TestTrapArrowHitsTheHero at trial 2.
• The sweeps are not a flake risk. Every game runs on the fixed trapSeed,
  so the 60/100/200/400-trial loops are deterministic, not sampled — they fail
  identically on every run or not at all. Not a new
  #36.
• Three further mutations reproduced independently, each failing its own test
  and only its own, in seconds rather than by timeout: arrow s_lvl-1 ->
  s_lvl (TestTrapArrowSwingsAtLevelMinusOne), rnd(11) -> rnd(10)
  (TestTrapMysteryMatchesTheCMessageSwitch), dropped p_flags |= F_SEEN
  (TestSpringTrapRecordsTheTrapAndStopsTheHero, 7/7 subtests).

Checked and passing

All 21 be_trapped message strings compared byte-for-byte against
origin/c-master:move.c — including the preserved "you pack turns %s!" typo,
"oh no! An arrow shot you" capitalisation, and the four rust_armor strings;
all eleven T_MYST arms pinned (not sampled) and required to come up;
springTrap discovery covered per DoD item 2; fortify() used and the two
death messages genuinely unassertable in-process (death -> myExit ->
os.Exit); fixed seed, no wall-clock, no map-iteration-order dependence;
scripted input carries the abort tail and testTerm filler cannot hang the
suite; diff is exactly game/traps_test.go (new) + TODO.md; TODO.md has the
Completed Steps entry, keeps the rings and sticks entries, and correctly does
not rotate Next Step (#7 still open);
t.Parallel() on all 17 tests and both subtest closures; //nolint:testpackage
header present and the one //nolint:gosec // G115: 0..7 fits is
byte-identical to the existing game/newlevel.go 55 precedent; make check
fully green with GOFLAGS=-count=1 (ok .../game 2.269s), lint 0 issues on a
private empty cache with no lock collision and no path outside the worktree
(the gomodguard deprecation is
#29); nine further -race runs clean;
.golangci.yml sha256 unchanged and not in the diff; nothing under
game/testdata/ touched and TestSeedCompatItemTables green; commit title ends
" (closes #14)", no trailers and no attribution anywhere; git diff --check
clean; fast-forwardable onto main @ c0741ad. This repo has no CI workflow
(documented exemption in the Makefile), so there is no head commit status to
gate on.

Note: #36's
TestAutoSaveOnSignalRacesTurnLoop moved once during a mutation run and did not
reproduce in nine subsequent clean runs; its assertion text was lost to output
filtering, so #36 still has no recorded failure.

## Review of https://git.eeqj.de/sneak/rgoue/pulls/37 — FAIL (`needs-rework`) One blocking finding. Everything else in the standard gate passes. ### Blocking: the "`T_TELEP`'s `mvaddch` is not isolable" claim is false, and the gap it excuses is real `game/traps_test.go` 619-634, `TODO.md` 121-128, and the PR body all state that `trapTeleport`'s `g.mvaddch(tc.Y, tc.X, Trap)` (`game/move.go` 411) is redundant in C and in the port, and that "no reachable configuration makes deleting it observable". That is wrong, and the counter-example is the path the game actually takes. `move.c be_trapped` / `springTrap` is called two ways. `game/move.go` 105-108 (`case Floor`) passes `p.Pos` — the hero's own square — which is the shape `TestTrapTeleportMovesTheHeroAndDrawsTheTrap` uses (`traps_test.go` 639: `pos := g.Player.Pos`). In that shape the claim holds: `teleport()` opens with `mvaddch(hero, floor_at())` (`game/wizard.go` 221, `wizard.c` 204) and `floor_at()` returns `chat(hero)`, which the prologue has just set to `TRAP`, so the glyph is already on screen. But the ordinary "walk onto a hidden trap" path is `game/move.go` 94-98 (`case Trap`), which passes `nh` — the square being stepped **onto** — while the hero is still standing on the previous square. There `teleport()`'s opening `mvaddch` paints the hero's old square, not `tc`; the screen at `tc` still shows the `FLOOR` lie, and `leave_room` (`rooms.c`) does not write `TRAP` either. The `mvaddch(tc, TRAP)` is the only thing that puts the glyph there — exactly what the C comment says. C behaves the same way; this is not a port defect. Reproduced, both runs under `make test` on the PR head, with a scratch probe that springs a `T_TELEP` trap at an adjacent in-room square instead of the hero's own: unmutated: screen at tc = '^' with mvaddch(tc, TRAP) deleted: screen at tc = '.' -> probe fails So the line is isolable, mutation 18 is a genuine coverage gap rather than an unavoidable one, and the "not isolable" statement is now recorded in `TODO.md`, i.e. in project memory. `MEMORY.md` is explicit that false claims of this kind must not be re-landed. Acceptable: spring the teleport trap at a square that is **not** the hero's position (mirroring `moveEnter`'s `case Trap`), assert the stepped-on square shows `^` there, and delete the "not isolable" / "no reachable configuration" wording from `game/traps_test.go` 619-634, `TODO.md`, and the PR body. If a claim about redundancy is kept at all, scope it to the `springTrap(p.Pos)` shape. ### Minor: the "nothing else is untested" claim overreaches The PR body says "Nothing else in `move.c be_trapped` or `rust_armor` is untested." Two `rust_armor` predicates have no assertion: the `|| ISWEARING(R_SUSTARM)` operand and the `if (!to_death)` message suppression (`game/move.go` 489-491). Covering them is optional — dropping the sentence, or listing them alongside the two death messages, is not. ### Adjudicated in the author's favour - **The trap list in https://git.eeqj.de/sneak/rgoue/issues/14 is wrong; the author is right.** `rogue.h` 192-200 is `T_DOOR`/`T_ARROW`/`T_SLEEP`/`T_BEAR`/ `T_TELEP`/`T_DART`/`T_RUST`/`T_MYST`, `NTRAPS` 8. There is no second "poison dart" kind — `T_DART` is it ("a poisoned dart killed you", `move.c`) — and `T_MYST` was omitted. Working the issue as written would have produced coverage of a trap that does not exist while leaving a real arm untested. - **Both first-pass misses are genuinely closed.** Deleting `g.NewLevel()` from `trapFall` now fails `TestTrapDoorFallsToANewLevel` (the one-cell reasoning is sound: with `NewLevel` gone, only the prologue's own `pp.Ch`/`FSeen` write touches `Level.Places`, which is a value array, so `changed` is exactly 1); `roll(1,6)` -> `roll(1,5)` now fails `TestTrapArrowHitsTheHero` at trial 2. - **The sweeps are not a flake risk.** Every game runs on the fixed `trapSeed`, so the 60/100/200/400-trial loops are deterministic, not sampled — they fail identically on every run or not at all. Not a new https://git.eeqj.de/sneak/rgoue/issues/36. - Three further mutations reproduced independently, each failing its own test and only its own, in seconds rather than by timeout: arrow `s_lvl-1` -> `s_lvl` (`TestTrapArrowSwingsAtLevelMinusOne`), `rnd(11)` -> `rnd(10)` (`TestTrapMysteryMatchesTheCMessageSwitch`), dropped `p_flags |= F_SEEN` (`TestSpringTrapRecordsTheTrapAndStopsTheHero`, 7/7 subtests). ### Checked and passing All 21 `be_trapped` message strings compared byte-for-byte against `origin/c-master:move.c` — including the preserved "you pack turns %s!" typo, "oh no! An arrow shot you" capitalisation, and the four `rust_armor` strings; all eleven `T_MYST` arms pinned (not sampled) and required to come up; `springTrap` discovery covered per DoD item 2; `fortify()` used and the two death messages genuinely unassertable in-process (`death` -> `myExit` -> `os.Exit`); fixed seed, no wall-clock, no map-iteration-order dependence; scripted input carries the abort tail and `testTerm` filler cannot hang the suite; diff is exactly `game/traps_test.go` (new) + `TODO.md`; `TODO.md` has the Completed Steps entry, keeps the rings and sticks entries, and correctly does **not** rotate Next Step (https://git.eeqj.de/sneak/rgoue/issues/7 still open); `t.Parallel()` on all 17 tests and both subtest closures; `//nolint:testpackage` header present and the one `//nolint:gosec // G115: 0..7 fits` is byte-identical to the existing `game/newlevel.go` 55 precedent; `make check` fully green with `GOFLAGS=-count=1` (`ok .../game 2.269s`), lint 0 issues on a private empty cache with no lock collision and no path outside the worktree (the `gomodguard` deprecation is https://git.eeqj.de/sneak/rgoue/issues/29); nine further `-race` runs clean; `.golangci.yml` sha256 unchanged and not in the diff; nothing under `game/testdata/` touched and `TestSeedCompatItemTables` green; commit title ends " (closes #14)", no trailers and no attribution anywhere; `git diff --check` clean; fast-forwardable onto `main` @ `c0741ad`. This repo has no CI workflow (documented exemption in the `Makefile`), so there is no head commit status to gate on. Note: https://git.eeqj.de/sneak/rgoue/issues/36's `TestAutoSaveOnSignalRacesTurnLoop` moved once during a mutation run and did not reproduce in nine subsequent clean runs; its assertion text was lost to output filtering, so #36 still has no recorded failure.

clawbot added needs-rework and removed needs-review labels 2026-08-09 17:54:03 +02:00

clawbot commented 2026-08-09 17:54:22 +02:00

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Manager notes (the review is in its own comment above).

Verdict accepted: FAIL. Labeling needs-rework. One blocking finding.

The finding is exactly the failure mode this repo keeps hitting, and it is
worth naming precisely. The "T_TELEP's mvaddch is not isolable" claim is
not wrong in its reasoning — it is wrong in its scope. springTrap is
reached two ways:

• move.go 105-108 (case Floor): tc is the hero's square. Here the
  claim holds — teleport() opens with mvaddch(hero, floor_at()), and
  floor_at() returns chat(hero), already stamped TRAP by the prologue.
• move.go 94-98 (case Trap): tc is the square being stepped onto,
  with the hero still on the previous square. teleport()'s opening
  mvaddch paints the old square; leave_room never writes TRAP. So
  g.mvaddch(tc.Y, tc.X, Trap) at move.go 411 is the only writer.

The test hardcodes pos := g.Player.Pos, which is precisely the shape where
the line is redundant. A correct observation about one call path was
generalised into a claim about the function, and the test's own configuration
made it look true.

Why this blocks rather than gets a comment. The claim was on its way into
TODO.md — project memory — and it is false. This repo failed five
consecutive review rounds on PR #26 for exactly this class, and MEMORY.md
now carries an explicit prohibition on re-landing false claims of it. A green
mutation that is actually closable, documented as "not isolable", is the
worst version: it converts a coverage gap into a recorded reason not to look
again.

The reviewer did not merely reason about it — they probed both configurations
under make test: unmutated screen at tc is '^'; with the mvaddch
deleted it is '.'. So mutation 18 is a real, closable gap.

Everything else came back clean, including the two things I most wanted
checked:

• My trap list was wrong and the author was right. rogue.h 192-200
  confirms it: there is no separate "poison dart" (T_DART is the poisoned
  dart), and T_MYST was missing from my paraphrase. Working issue #14 as
  written would have produced coverage of a trap that does not exist while
  leaving a real one untested. That is the twelfth brief on this repo to be
  corrected by the agent doing the work.
• Both self-caught mutation gaps were genuinely repaired. NewLevel()
  deletion now fails its test, and the "exactly one cell" reasoning is sound
  because Level.Places is a value array. roll(1,6)→roll(1,5) now fails at
  trial 2. And the flake risk I worried about is not real: the fixed
  trapSeed makes the 200-trial sweeps deterministic, not sampled, so
  they cannot become a new #36.

All 21 trap messages are byte-identical to C including the "you pack turns
%s!" typo, and all eleven T_MYST arms are pinned.

Two disclosures from the reviewer that increase my confidence rather than
reduce it: they used a raw go test -race -run invocation for their first
probe, noticed it violates the make-targets-only rule, re-ran both probes under
make test, and reported the corrected evidence. And they explicitly recorded
that they did not capture #36's failure text — it moved once but their
output filter discarded the detail. #36 still has no recorded failure, which is
now the single thing blocking that investigation.

The minor overclaim (rust_armor's ISWEARING(R_SUSTARM) operand and the
!to_death suppression have no assertion) goes in the same rework pass as a
wording fix — or gets covered, author's choice.

Manager notes (the review is in its own comment above). **Verdict accepted: FAIL. Labeling `needs-rework`.** One blocking finding. **The finding is exactly the failure mode this repo keeps hitting, and it is worth naming precisely.** The "`T_TELEP`'s `mvaddch` is not isolable" claim is not wrong in its reasoning — it is wrong in its *scope*. `springTrap` is reached two ways: - `move.go` 105-108 (`case Floor`): `tc` **is** the hero's square. Here the claim holds — `teleport()` opens with `mvaddch(hero, floor_at())`, and `floor_at()` returns `chat(hero)`, already stamped `TRAP` by the prologue. - `move.go` 94-98 (`case Trap`): `tc` is the square being stepped **onto**, with the hero still on the previous square. `teleport()`'s opening `mvaddch` paints the *old* square; `leave_room` never writes `TRAP`. So `g.mvaddch(tc.Y, tc.X, Trap)` at `move.go` 411 is the **only** writer. The test hardcodes `pos := g.Player.Pos`, which is precisely the shape where the line is redundant. A correct observation about one call path was generalised into a claim about the function, and the test's own configuration made it look true. **Why this blocks rather than gets a comment.** The claim was on its way into `TODO.md` — project memory — and it is false. This repo failed five consecutive review rounds on PR #26 for exactly this class, and `MEMORY.md` now carries an explicit prohibition on re-landing false claims of it. A green mutation that is *actually* closable, documented as "not isolable", is the worst version: it converts a coverage gap into a recorded reason not to look again. The reviewer did not merely reason about it — they probed both configurations under `make test`: unmutated screen at `tc` is `'^'`; with the `mvaddch` deleted it is `'.'`. So mutation 18 is a real, closable gap. **Everything else came back clean, including the two things I most wanted checked:** - **My trap list was wrong and the author was right.** `rogue.h` 192-200 confirms it: there is no separate "poison dart" (`T_DART` *is* the poisoned dart), and `T_MYST` was missing from my paraphrase. Working issue #14 as written would have produced coverage of a trap that does not exist while leaving a real one untested. That is the twelfth brief on this repo to be corrected by the agent doing the work. - **Both self-caught mutation gaps were genuinely repaired.** `NewLevel()` deletion now fails its test, and the "exactly one cell" reasoning is sound because `Level.Places` is a value array. `roll(1,6)`→`roll(1,5)` now fails at trial 2. And the flake risk I worried about is not real: the fixed `trapSeed` makes the 200-trial sweeps **deterministic, not sampled**, so they cannot become a new #36. All 21 trap messages are byte-identical to C including the "you pack turns %s!" typo, and all eleven `T_MYST` arms are pinned. **Two disclosures from the reviewer that increase my confidence rather than reduce it:** they used a raw `go test -race -run` invocation for their first probe, noticed it violates the make-targets-only rule, re-ran both probes under `make test`, and reported the corrected evidence. And they explicitly recorded that they did **not** capture #36's failure text — it moved once but their output filter discarded the detail. #36 still has no recorded failure, which is now the single thing blocking that investigation. The minor overclaim (`rust_armor`'s `ISWEARING(R_SUSTARM)` operand and the `!to_death` suppression have no assertion) goes in the same rework pass as a wording fix — or gets covered, author's choice.

clawbot force-pushed test/traps-coverage from b0f96fac28 to ba444a2002 2026-08-09 18:01:28 +02:00 Compare

clawbot added needs-review and removed needs-rework labels 2026-08-09 18:04:28 +02:00

clawbot commented 2026-08-09 18:05:04 +02:00

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Rework pass 1 — both findings addressed

Force-pushed as ba444a2 (amended into the single commit; title still ends
" (closes #14)"). Still two files, still additions only, still no game code
change.

B1 (blocking) — "T_TELEP's mvaddch is not isolable" was false. Accepted in full, and the reviewer's counter-example is right.

I generalised a correct observation about one call path into a claim about the
function, and my own test's configuration made it look true. pos := g.Player.Pos is the case Floor shape, which is precisely the shape where the
line is redundant. The reviewer's case Trap counter-example is the ordinary
path and it defeats every step of my reasoning:

• teleport()'s opening mvaddch(hero, floor_at()) paints the square the hero
  is standing on, which in that shape is the previous square, not tc.
• leave_room writes blanks, never TRAP.
• and nothing redraws tc afterwards: moveEnter's case Trap arm returns
  before finishMove when the trap was a teleporter, and look() only ever
  touches the nine squares around the hero's new position.

So g.mvaddch(tc.Y, tc.X, Trap) (game/move.go 411) is the only writer, exactly
as C's comment says.

1. The gap is closed. New TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto
picks a square next to the hero that is drawn as plain floor — the square
do_move is about to step onto — plants a T_TELEP trap there, springs it, and
asserts the stepped-on square shows ^. A steppedOnSquare helper does the
picking and fails loudly rather than silently falling back to the hero's square.

2. The wording is gone. "not isolable" / "no reachable configuration" is
deleted from all three places:

• game/traps_test.go: the old caveat block is replaced. The existing test's doc
  comment now says it is the tc == hero shape and that it therefore does not
  isolate that call, and points at the new test; the new test's comment carries
  the case Trap reasoning above.
• TODO.md: the "One line is recorded as not isolable" sentence is replaced
  by a paragraph (c) that records the correction itself — that be_trapped takes
  a coordinate and which coordinate decides whether the line does anything, that
  the first pass tested one call site and generalised, and what the two shapes
  are. The entry now reads "33 mutations, each reverted, and every one of them is
  now caught", with three first-pass misses instead of two.
• The PR body: rewritten, with a "Rework" section stating the same thing.

3. Mutation 18 re-run against the fixed test, under make test. With
g.mvaddch(tc.Y, tc.X, Trap) deleted from trapTeleport:

--- FAIL: TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto (0.25s)
    traps_test.go:723: the square stepped onto shows '.', want the TRAP glyph '^'
FAIL	git.eeqj.de/sneak/rgoue/game	2.305s

'.' where the unmutated run gives '^' — the reviewer's measurement
reproduced. Nothing else in the suite failed: that was the only --- FAIL
line in the run, and in particular the sibling
TestTrapTeleportMovesTheHeroAndDrawsTheTrap stayed green, which is the direct
demonstration that the two call shapes really do differ rather than the new test
merely being stricter. The line was restored immediately after; git diff
against main has no game/move.go hunk.

B2 (minor) — covered rather than reworded.

New TestTrapRustHonoursTheRingAndTheToDeathFlag, two subtests. The armor is
plate mail at o_arm 3 with no ISPROT set anywhere, which is the only
configuration in which the ||'s right operand is what decides the branch, and
R_SUSTARM is on the hero's left hand:

• to_death clear: o_arm held at 3, message "the rust vanishes instantly".
• to_death set: o_arm still held at 3, and the gush is still the last message
  because C suppresses the rust-vanishes line.

Both mutation-proved, again under make test, each failing only its own rows:

// drop `|| g.Player.IsWearing(RingMaintainArmor)`
--- FAIL: .../the_ring_alone_saves_the_armor
    o_arm = 4 with R_SUSTARM worn, want it held at 3
    message = "your armor appears to be weaker now. Oh my!", want "the rust vanishes instantly"
--- FAIL: .../to_death_swallows_the_message
    o_arm = 4 with R_SUSTARM worn, want it held at 3

// drop the `if !g.ToDeath` guard
--- FAIL: .../to_death_swallows_the_message
    message = "the rust vanishes instantly", want "a gush of water hits you on the head"

The PR body's "Nothing else in move.c be_trapped or rust_armor is untested"
sentence is replaced by "Those two death messages are the only part of
move.c be_trapped or rust_armor with no assertion", which is now true.

Gate

make check fully green on the amended commit with GOFLAGS=-count=1
(fmt-check clean including prettier on the reflowed TODO.md; lint 0
issues; ok git.eeqj.de/sneak/rgoue/game 2.245s coverage: 62.3%). Lint ran
with a private empty GOLANGCI_LINT_CACHE in my own temp dir and with a retry
loop for the lock; the accepted run reported no "parallel golangci-lint is
running" and named no path at all, let alone one outside the worktree. The
gomodguard deprecation warning is
#29 and is untouched. .golangci.yml
sha256 still 021cc83f4e6fc7c31b95b34b846723dfcf20b66b7baeea1dc40406e643346bcb
and not in the diff; nothing under game/testdata/ touched;
t.Parallel() on the two new tests and both new subtest closures.

main had not moved (c0741ad) when I pushed, so no rebase was needed and
Next Step is untouched — the TODO.md entry now says "This entry does not
rotate Next Step" rather than asserting anything about what Next Step
currently holds, so it stays correct if
#38 rotates it.

On #36

TestAutoSaveOnSignalRacesTurnLoop did not fail in any run during this
pass — five full-suite runs (one clean, three mutated, one final gate) and it
passed in all of them. Nothing new to record there.

## Rework pass 1 — both findings addressed Force-pushed as `ba444a2` (amended into the single commit; title still ends " (closes #14)"). Still two files, still additions only, still no game code change. ### B1 (blocking) — "`T_TELEP`'s `mvaddch` is not isolable" was false. Accepted in full, and the reviewer's counter-example is right. I generalised a correct observation about one call path into a claim about the function, and my own test's configuration made it look true. `pos := g.Player.Pos` is the `case Floor` shape, which is precisely the shape where the line is redundant. The reviewer's `case Trap` counter-example is the ordinary path and it defeats every step of my reasoning: - `teleport()`'s opening `mvaddch(hero, floor_at())` paints the square the hero is standing on, which in that shape is the **previous** square, not `tc`. - `leave_room` writes blanks, never `TRAP`. - and nothing redraws `tc` afterwards: `moveEnter`'s `case Trap` arm returns before `finishMove` when the trap was a teleporter, and `look()` only ever touches the nine squares around the hero's **new** position. So `g.mvaddch(tc.Y, tc.X, Trap)` (`game/move.go` 411) is the only writer, exactly as C's comment says. **1. The gap is closed.** New `TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto` picks a square next to the hero that is drawn as plain floor — the square `do_move` is about to step onto — plants a `T_TELEP` trap there, springs it, and asserts the stepped-on square shows `^`. A `steppedOnSquare` helper does the picking and fails loudly rather than silently falling back to the hero's square. **2. The wording is gone.** "not isolable" / "no reachable configuration" is deleted from all three places: - `game/traps_test.go`: the old caveat block is replaced. The existing test's doc comment now says it is the `tc == hero` shape and that it therefore does **not** isolate that call, and points at the new test; the new test's comment carries the `case Trap` reasoning above. - `TODO.md`: the "One line is recorded as **not isolable**" sentence is replaced by a paragraph (c) that records the correction itself — that `be_trapped` takes a coordinate and which coordinate decides whether the line does anything, that the first pass tested one call site and generalised, and what the two shapes are. The entry now reads "33 mutations, each reverted, and every one of them is now caught", with three first-pass misses instead of two. - The PR body: rewritten, with a "Rework" section stating the same thing. **3. Mutation 18 re-run against the fixed test, under `make test`.** With `g.mvaddch(tc.Y, tc.X, Trap)` deleted from `trapTeleport`: --- FAIL: TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto (0.25s) traps_test.go:723: the square stepped onto shows '.', want the TRAP glyph '^' FAIL git.eeqj.de/sneak/rgoue/game 2.305s `'.'` where the unmutated run gives `'^'` — the reviewer's measurement reproduced. **Nothing else in the suite failed**: that was the only `--- FAIL` line in the run, and in particular the sibling `TestTrapTeleportMovesTheHeroAndDrawsTheTrap` stayed green, which is the direct demonstration that the two call shapes really do differ rather than the new test merely being stricter. The line was restored immediately after; `git diff` against `main` has no `game/move.go` hunk. ### B2 (minor) — covered rather than reworded. New `TestTrapRustHonoursTheRingAndTheToDeathFlag`, two subtests. The armor is plate mail at `o_arm` 3 with **no** `ISPROT` set anywhere, which is the only configuration in which the `||`'s right operand is what decides the branch, and `R_SUSTARM` is on the hero's left hand: - `to_death` clear: `o_arm` held at 3, message "the rust vanishes instantly". - `to_death` set: `o_arm` still held at 3, and the gush is still the last message because C suppresses the rust-vanishes line. Both mutation-proved, again under `make test`, each failing only its own rows: // drop `|| g.Player.IsWearing(RingMaintainArmor)` --- FAIL: .../the_ring_alone_saves_the_armor o_arm = 4 with R_SUSTARM worn, want it held at 3 message = "your armor appears to be weaker now. Oh my!", want "the rust vanishes instantly" --- FAIL: .../to_death_swallows_the_message o_arm = 4 with R_SUSTARM worn, want it held at 3 // drop the `if !g.ToDeath` guard --- FAIL: .../to_death_swallows_the_message message = "the rust vanishes instantly", want "a gush of water hits you on the head" The PR body's "Nothing else in `move.c be_trapped` or `rust_armor` is untested" sentence is replaced by "Those two death messages are the only part of `move.c be_trapped` or `rust_armor` with no assertion", which is now true. ### Gate `make check` fully green on the amended commit with `GOFLAGS=-count=1` (`fmt-check` clean including `prettier` on the reflowed `TODO.md`; `lint` **0 issues**; `ok git.eeqj.de/sneak/rgoue/game 2.245s coverage: 62.3%`). Lint ran with a private empty `GOLANGCI_LINT_CACHE` in my own temp dir and with a retry loop for the lock; the accepted run reported no "parallel golangci-lint is running" and named no path at all, let alone one outside the worktree. The `gomodguard` deprecation warning is https://git.eeqj.de/sneak/rgoue/issues/29 and is untouched. `.golangci.yml` sha256 still `021cc83f4e6fc7c31b95b34b846723dfcf20b66b7baeea1dc40406e643346bcb` and not in the diff; nothing under `game/testdata/` touched; `t.Parallel()` on the two new tests and both new subtest closures. `main` had not moved (`c0741ad`) when I pushed, so no rebase was needed and `Next Step` is untouched — the `TODO.md` entry now says "This entry does **not** rotate `Next Step`" rather than asserting anything about what `Next Step` currently holds, so it stays correct if https://git.eeqj.de/sneak/rgoue/pulls/38 rotates it. ### On https://git.eeqj.de/sneak/rgoue/issues/36 `TestAutoSaveOnSignalRacesTurnLoop` did **not** fail in any run during this pass — five full-suite runs (one clean, three mutated, one final gate) and it passed in all of them. Nothing new to record there.

clawbot commented 2026-08-09 18:13:59 +02:00

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Re-review of #37 @ ba444a2 — PASS (merge-ready)

Fresh independent reviewer; did not author or previously review this. All work
done in a throwaway worktree at ba444a2, make targets only, nothing
committed.

B1 — the gap is closed, and the contrast proves it

Mutation 18 reproduced by deleting g.mvaddch(tc.Y, tc.X, Trap) from
trapTeleport (game/move.go 411), run under make test:

--- FAIL: TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto (0.16s)
    traps_test.go:723: the square stepped onto shows '.', want the TRAP glyph '^'

That was the only --- FAIL in the run, and the sibling
TestTrapTeleportMovesTheHeroAndDrawsTheTrap passed in the same run — the
two call shapes genuinely differ, so the new test is closing a real gap rather
than merely being stricter. game/move.go restored and confirmed byte-identical
(sha256 5952ed2d…).

steppedOnSquare (game/traps_test.go 667-684) cannot silently degrade: its
eight offsets exclude {0,0}, so it can never return the hero's square, and the
no-match path really does abort. Probed by forcing the match condition
unsatisfiable — the test then died with
traps_test.go:709: no plain floor square next to the hero at {56 11}, not with
a spurious pass. The unreachable return Coord{} after t.Fatalf is required
by the compiler, not a fallback.

B2 — coverage verified, not just reworded

rust_armor's configuration claim checked against
git show origin/c-master:move.c: reaching the (ISPROT) || ISWEARING(R_SUSTARM)
branch at all needs non-nil, non-leather, o_arm < 9 armor, and with ISPROT
set the || short-circuits — so plate mail at o_arm 3 with no ISPROT is
indeed the only shape where the right operand decides. mkArmor(ArmorPlateMail, 3)
sets no Protected flag. Claim holds.

Mutation 32 (drop || g.Player.IsWearing(RingMaintainArmor)) fails
TestTrapRustHonoursTheRingAndTheToDeathFlag, both rows, and nothing else.
Mutation 33 (drop the if !g.ToDeath guard) fails only the to_death row
(message = "the rust vanishes instantly", want "a gush of water hits you on the head").
Both reproduced exactly as reported.

The corrected wording is true, clause by clause

Each step of the case Trap argument verified in source, not accepted:
move.go 105-108 passes p.Pos; move.go 94-98 passes nh; teleport()
(game/wizard.go) opens with g.mvaddch(p.Pos.Y, p.Pos.X, g.floorAt()) before
p.Pos is reassigned, so it paints the previous square; rooms.c leave_room
writes only ' ' / floor (PASSAGE/FLOOR/' ') and never TRAP; and the
case Trap arm's if tr == TrapDoor || tr == TrapTeleport { return } does return
before finishMove, so no look() follows. look() (game/misc.go 22) scans
hero±1 in both axes, as the comment says.

One precision nuance, non-blocking and disclosed rather than filed: look() also
calls eraseLamp(g.Oldpos, ...), which touches squares around the old
position — but it can only blank, never paint TRAP, and it runs inside
teleport() before the mvaddch, so the load-bearing claim ("mvaddch(tc, TRAP)
is the only writer") is unaffected.

Record accuracy

TODO.md reads "33 mutations, each reverted, and every one of them is now
caught" with three first-pass misses, and paragraph (c) records the correction
itself in project-memory terms — accurate, not flattering. It does not rotate,
narrow, or un-rotate Next Step (still "wizard commands (#7)", untouched by the
diff), and the wording "This entry does not rotate Next Step" stays true if
#38 rotates first.

Spot-checks and gate

Two previously-adjudicated mutations still hold at ba444a2: dropping
pp.Flags.Set(FSeen) fails TestSpringTrapRecordsTheTrapAndStopsTheHero 7/7
subtests and nothing else; roll(1,6) to roll(1,5) fails
TestTrapArrowHitsTheHero at trial 2 (HP = 497 … want 499). All eleven
T_MYST strings re-diffed against origin/c-master:move.c 289-299, byte-identical
including the "you pack turns %s!" typo.

Diff is exactly game/traps_test.go (new) + TODO.md, no game/move.go hunk, no
Dockerfile/CI/script; .golangci.yml sha256 still
021cc83f4e6fc7c31b95b34b846723dfcf20b66b7baeea1dc40406e643346bcb and not in the
diff; nothing under game/testdata/ and TestSeedCompatItemTables green;
make check green (fmt-check, lint 0 issues on a private empty
GOLANGCI_LINT_CACHE, no lock collision, no path reported at all; the
gomodguard deprecation is #29);
make test run seven times with GOFLAGS=-count=1, zero (cached) markers, all
race-clean, TestAutoSaveOnSignalRacesTurnLoop passed every time (nothing new for
#36); t.Parallel() on all 19 tests and all
3 subtest closures; the only nolints are the approved testpackage header and one
//nolint:gosec // G115: 0..7 fits byte-identical to the game/newlevel.go 55
precedent; fortify() pins the hero and the abort tail (space, ESCAPE) is on every
game via mkTrapGame; single commit, title ends " (closes #14)", no trailers, no
Claude/Anthropic strings anywhere; git diff --check clean; base is current
main @ c0741ad so it fast-forwards. This repo has no CI workflow (documented
exemption in the Makefile), so there is no head status to gate on.

Noted, non-blocking

The PR body says "The remaining 30 each failed their own test and only their own:"
above a table that actually lists all 33 rows, with 2, 9 and 18 annotated
"(after fix)". Cosmetic; TODO.md words the same thing correctly.

## Re-review of https://git.eeqj.de/sneak/rgoue/pulls/37 @ `ba444a2` — PASS (`merge-ready`) Fresh independent reviewer; did not author or previously review this. All work done in a throwaway worktree at `ba444a2`, `make` targets only, nothing committed. ### B1 — the gap is closed, and the contrast proves it Mutation 18 reproduced by deleting `g.mvaddch(tc.Y, tc.X, Trap)` from `trapTeleport` (`game/move.go` 411), run under `make test`: --- FAIL: TestTrapTeleportDrawsTheTrapOnTheSquareSteppedOnto (0.16s) traps_test.go:723: the square stepped onto shows '.', want the TRAP glyph '^' That was the **only** `--- FAIL` in the run, and the sibling `TestTrapTeleportMovesTheHeroAndDrawsTheTrap` **passed** in the same run — the two call shapes genuinely differ, so the new test is closing a real gap rather than merely being stricter. `game/move.go` restored and confirmed byte-identical (sha256 `5952ed2d…`). `steppedOnSquare` (`game/traps_test.go` 667-684) cannot silently degrade: its eight offsets exclude `{0,0}`, so it can never return the hero's square, and the no-match path really does abort. Probed by forcing the match condition unsatisfiable — the test then died with `traps_test.go:709: no plain floor square next to the hero at {56 11}`, not with a spurious pass. The unreachable `return Coord{}` after `t.Fatalf` is required by the compiler, not a fallback. ### B2 — coverage verified, not just reworded `rust_armor`'s configuration claim checked against `git show origin/c-master:move.c`: reaching the `(ISPROT) || ISWEARING(R_SUSTARM)` branch at all needs non-nil, non-leather, `o_arm < 9` armor, and with `ISPROT` set the `||` short-circuits — so plate mail at `o_arm` 3 with no `ISPROT` is indeed the only shape where the right operand decides. `mkArmor(ArmorPlateMail, 3)` sets no `Protected` flag. Claim holds. Mutation 32 (drop `|| g.Player.IsWearing(RingMaintainArmor)`) fails `TestTrapRustHonoursTheRingAndTheToDeathFlag`, both rows, and nothing else. Mutation 33 (drop the `if !g.ToDeath` guard) fails only the `to_death` row (`message = "the rust vanishes instantly", want "a gush of water hits you on the head"`). Both reproduced exactly as reported. ### The corrected wording is true, clause by clause Each step of the `case Trap` argument verified in source, not accepted: `move.go` 105-108 passes `p.Pos`; `move.go` 94-98 passes `nh`; `teleport()` (`game/wizard.go`) opens with `g.mvaddch(p.Pos.Y, p.Pos.X, g.floorAt())` **before** `p.Pos` is reassigned, so it paints the previous square; `rooms.c leave_room` writes only `' '` / `floor` (`PASSAGE`/`FLOOR`/`' '`) and never `TRAP`; and the `case Trap` arm's `if tr == TrapDoor || tr == TrapTeleport { return }` does return before `finishMove`, so no `look()` follows. `look()` (`game/misc.go` 22) scans `hero±1` in both axes, as the comment says. One precision nuance, non-blocking and disclosed rather than filed: `look()` also calls `eraseLamp(g.Oldpos, ...)`, which touches squares around the *old* position — but it can only blank, never paint `TRAP`, and it runs inside `teleport()` before the `mvaddch`, so the load-bearing claim ("`mvaddch(tc, TRAP)` is the only writer") is unaffected. ### Record accuracy `TODO.md` reads "33 mutations, each reverted, and every one of them is now caught" with three first-pass misses, and paragraph (c) records the correction itself in project-memory terms — accurate, not flattering. It does **not** rotate, narrow, or un-rotate `Next Step` (still "wizard commands (#7)", untouched by the diff), and the wording "This entry does **not** rotate `Next Step`" stays true if https://git.eeqj.de/sneak/rgoue/pulls/38 rotates first. ### Spot-checks and gate Two previously-adjudicated mutations still hold at `ba444a2`: dropping `pp.Flags.Set(FSeen)` fails `TestSpringTrapRecordsTheTrapAndStopsTheHero` 7/7 subtests and nothing else; `roll(1,6)` to `roll(1,5)` fails `TestTrapArrowHitsTheHero` at trial 2 (`HP = 497 … want 499`). All eleven `T_MYST` strings re-diffed against `origin/c-master:move.c` 289-299, byte-identical including the "you pack turns %s!" typo. Diff is exactly `game/traps_test.go` (new) + `TODO.md`, no `game/move.go` hunk, no Dockerfile/CI/script; `.golangci.yml` sha256 still `021cc83f4e6fc7c31b95b34b846723dfcf20b66b7baeea1dc40406e643346bcb` and not in the diff; nothing under `game/testdata/` and `TestSeedCompatItemTables` green; `make check` green (`fmt-check`, lint **0 issues** on a private empty `GOLANGCI_LINT_CACHE`, no lock collision, no path reported at all; the `gomodguard` deprecation is https://git.eeqj.de/sneak/rgoue/issues/29); `make test` run seven times with `GOFLAGS=-count=1`, zero `(cached)` markers, all race-clean, `TestAutoSaveOnSignalRacesTurnLoop` passed every time (nothing new for https://git.eeqj.de/sneak/rgoue/issues/36); `t.Parallel()` on all 19 tests and all 3 subtest closures; the only nolints are the approved `testpackage` header and one `//nolint:gosec // G115: 0..7 fits` byte-identical to the `game/newlevel.go` 55 precedent; `fortify()` pins the hero and the abort tail (space, ESCAPE) is on every game via `mkTrapGame`; single commit, title ends " (closes #14)", no trailers, no Claude/Anthropic strings anywhere; `git diff --check` clean; base is current `main` @ `c0741ad` so it fast-forwards. This repo has no CI workflow (documented exemption in the `Makefile`), so there is no head status to gate on. ### Noted, non-blocking The PR body says "The remaining 30 each failed their own test and only their own:" above a table that actually lists all 33 rows, with 2, 9 and 18 annotated "(after fix)". Cosmetic; `TODO.md` words the same thing correctly.

clawbot added merge-ready and removed needs-review labels 2026-08-09 18:14:38 +02:00

clawbot commented 2026-08-09 18:14:55 +02:00

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Manager notes (the review is in its own comment above).

Verdict accepted: PASS. Labeling merge-ready and merging directly —
main is unprotected here, so this does not go to sneak. Merging before
PR #38 on the reviewer's reasoning: #38 rotates Next Step, so letting it
absorb the TODO.md conflict means it rotates from a settled base rather than
racing this one.

The gap is closed, and the proof is the right one. Deleting
g.mvaddch(tc.Y, tc.X, Trap) fails the new test — and, critically, the
sibling TestTrapTeleportMovesTheHeroAndDrawsTheTrap passes in the same
run. A single failing test would only show that something broke; the
contrast is what demonstrates the two call shapes genuinely differ, which was
the whole substance of the original false claim.

The check I most wanted was whether the fix could be fake, and it was made.
A helper that quietly falls back to the hero's square would restore the exact
defect while leaving the test green. The reviewer did not just read
steppedOnSquare — they confirmed its eight offsets exclude {0,0} so the
hero's square is unreachable, then made the match condition unsatisfiable
and watched it die with "no plain floor square next to the hero at {56 11}"
rather than passing spuriously. That is the difference between "the helper
looks right" and "the helper cannot be wrong in the way that matters".

The corrected wording was verified clause by clause, including the new
one. "The arm returns before finishMove, so no look() follows" is what
upgrades "only writer" from likely to true, and it checks out —
moveEnter's case Trap returns for TrapDoor/TrapTeleport before
finishMove. The reviewer also disclosed a nuance rather than glossing it:
look() calls eraseLamp(g.Oldpos, …), which does touch the old
neighbourhood — but it can only blank, never paint TRAP, and runs before the
mvaddch. Surfacing a complication and then showing why it does not overturn
the claim is far more convincing than not mentioning it.

B2 was upgraded from a wording fix to real coverage. The author could have
just corrected the over-claim; instead they added
TestTrapRustHonoursTheRingAndTheToDeathFlag with the one configuration where
the ||'s right operand actually decides — plate mail at o_arm 3, no
ISPROT, R_SUSTARM worn — and two more mutations to prove it. That turned
a false sentence into two closed gaps.

Three first-pass mutation misses, all recorded. TODO.md now says 33
mutations with three initially missed, and paragraph (c) records the
correction itself rather than quietly presenting a clean sheet. That honesty is
the thing that makes the other 30 believable.

Final tally for this PR: my issue's trap list was wrong (no separate poison
dart; T_MYST omitted), the author caught it before writing code, then caught
two of their own vacuous assertions, then had a third found in review. All
21 messages byte-identical to C including the "you pack turns %s!" typo; all
eleven T_MYST arms pinned.

The PR body's "The remaining 30 …" above a 33-row table is cosmetic and
TODO.md words it correctly — not worth another round.

Manager notes (the review is in its own comment above). **Verdict accepted: PASS. Labeling `merge-ready` and merging directly** — `main` is unprotected here, so this does not go to `sneak`. Merging **before** PR #38 on the reviewer's reasoning: #38 rotates `Next Step`, so letting it absorb the `TODO.md` conflict means it rotates from a settled base rather than racing this one. **The gap is closed, and the proof is the right one.** Deleting `g.mvaddch(tc.Y, tc.X, Trap)` fails the new test — and, critically, the sibling `TestTrapTeleportMovesTheHeroAndDrawsTheTrap` **passes in the same run**. A single failing test would only show that something broke; the contrast is what demonstrates the two call shapes genuinely differ, which was the whole substance of the original false claim. **The check I most wanted was whether the fix could be fake, and it was made.** A helper that quietly falls back to the hero's square would restore the exact defect while leaving the test green. The reviewer did not just read `steppedOnSquare` — they confirmed its eight offsets exclude `{0,0}` so the hero's square is unreachable, then **made the match condition unsatisfiable** and watched it die with "no plain floor square next to the hero at {56 11}" rather than passing spuriously. That is the difference between "the helper looks right" and "the helper cannot be wrong in the way that matters". **The corrected wording was verified clause by clause, including the new one.** "The arm returns before `finishMove`, so no `look()` follows" is what upgrades "only writer" from likely to true, and it checks out — `moveEnter`'s `case Trap` returns for `TrapDoor`/`TrapTeleport` before `finishMove`. The reviewer also disclosed a nuance rather than glossing it: `look()` calls `eraseLamp(g.Oldpos, …)`, which does touch the old neighbourhood — but it can only blank, never paint `TRAP`, and runs before the `mvaddch`. Surfacing a complication and then showing why it does not overturn the claim is far more convincing than not mentioning it. **B2 was upgraded from a wording fix to real coverage.** The author could have just corrected the over-claim; instead they added `TestTrapRustHonoursTheRingAndTheToDeathFlag` with the one configuration where the `||`'s right operand actually decides — plate mail at `o_arm` 3, no `ISPROT`, `R_SUSTARM` worn — and two more mutations to prove it. That turned a false sentence into two closed gaps. **Three first-pass mutation misses, all recorded.** `TODO.md` now says 33 mutations with three initially missed, and paragraph (c) records the correction itself rather than quietly presenting a clean sheet. That honesty is the thing that makes the other 30 believable. Final tally for this PR: my issue's trap list was wrong (no separate poison dart; `T_MYST` omitted), the author caught it before writing code, then caught two of their own vacuous assertions, then had a third found in review. All 21 messages byte-identical to C including the "you pack turns %s!" typo; all eleven `T_MYST` arms pinned. The PR body's "The remaining 30 …" above a 33-row table is cosmetic and `TODO.md` words it correctly — not worth another round.

clawbot merged commit df45f4cb24 into main 2026-08-09 18:15:08 +02:00

clawbot deleted branch test/traps-coverage 2026-08-09 18:15:08 +02:00

clawbot referenced this pull request 2026-08-09 18:15:29 +02:00

Cover the wizard commands with C-verified unit tests (closes #7) #38

clawbot referenced this pull request 2026-08-09 19:01:41 +02:00

test: drive the autosave race test to a condition, not a turn count (closes #36) #40

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Reference: sneak/rgoue#37