Stop the slow test packages waiting (closes #263)

- Tests hash passwords at bcrypt.MinCost through db.PasswordCost.
- Test IRC servers check the queue only on broker notification;
  one test keeps the 100 ms fallback poll.
- The stop-timeout test shortens the timeout through a test-only
  setter.
- service and handlers tests build config.Config directly instead
  of through config.New, so they run in parallel: service had run
  serially, and handlers started its servers one at a time.
- Repeated race trials run as parallel subtests.
- Fixed sleeps become waits on the broker.
- A new test covers the relay's failed queue read, which only the
  100 ms poll had reached.

Model: opus-5-5

internal/service/service_test.go

@@ -1,7 +1,3 @@
-// Tests use a global viper instance for configuration,
-// making parallel execution unsafe.
-//
-//nolint:paralleltest
 package service_test
 
 import (
@@ -59,28 +55,12 @@ func newTestEnv(t *testing.T) *testEnv {
 				}
 			},
 			logger.New,
-			func(
-				lifecycle fx.Lifecycle,
-				globs *globals.Globals,
-				log *logger.Logger,
-			) (*config.Config, error) {
-				cfg, err := config.New(
-					lifecycle, config.Params{ //nolint:exhaustruct
-						Globals: globs, Logger: log,
-					},
-				)
-				if err != nil {
-					return nil, fmt.Errorf(
-						"test config: %w", err,
-					)
+			func() *config.Config {
+				return &config.Config{
+					DBURL:        dbURL,
+					OperName:     "admin",
+					OperPassword: "secret",
 				}
-
-				cfg.DBURL = dbURL
-				cfg.Port = 0
-				cfg.OperName = "admin"
-				cfg.OperPassword = "secret"
-
-				return cfg, nil
 			},
 			func(
 				lifecycle fx.Lifecycle,
@@ -136,6 +116,8 @@ func createSession(
 // environment starts on an empty database while another one
 // is still open.
 func TestEachTestEnvHasItsOwnDatabase(t *testing.T) {
+	t.Parallel()
+
 	ctx := t.Context()
 
 	first := newTestEnv(t)
@@ -146,6 +128,8 @@ func TestEachTestEnvHasItsOwnDatabase(t *testing.T) {
 }
 
 func TestFanOut(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -173,6 +157,8 @@ func TestFanOut(t *testing.T) {
 }
 
 func TestJoinChannel(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -213,6 +199,8 @@ func TestJoinChannel(t *testing.T) {
 }
 
 func TestPartChannel(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -313,6 +301,8 @@ func joinConcurrently(
 // concurrent JOINs of a +l 2 channel with one member, one
 // gets in and the other gets ERR_CHANNELISFULL.
 func TestConcurrentJoinsRespectUserLimit(t *testing.T) {
+	t.Parallel()
+
 	const userLimit = 2
 
 	env := newTestEnv(t)
@@ -375,6 +365,8 @@ func TestConcurrentJoinsRespectUserLimit(t *testing.T) {
 // two concurrent JOINs that create a channel, exactly one
 // makes its session the operator.
 func TestConcurrentFirstJoinsMakeOneOperator(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -426,6 +418,8 @@ func TestConcurrentFirstJoinsMakeOneOperator(t *testing.T) {
 // either joins a channel that still exists or gets
 // ERR_NOSUCHCHANNEL, and never fails otherwise.
 func TestJoinConcurrentWithLastPart(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -491,6 +485,8 @@ func TestJoinConcurrentWithLastPart(t *testing.T) {
 // quits, gets in only once the channel is deleted, into a
 // new channel of that name with no key.
 func TestJoinConcurrentWithLastQuit(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -569,81 +565,95 @@ const quitCrowdSize = 10
 // ahead of that JOIN. The quitting session is also on a
 // channel with quitCrowdSize other sessions, made before the
 // watcher's channel, so that its QUIT reaches the watcher
-// last.
+// last. Each trial runs on a database of its own.
 func TestQuitQueuedAheadOfNewNickHoldersJoin(t *testing.T) {
-	env := newTestEnv(t)
-	ctx := t.Context()
+	t.Parallel()
 
 	for trial := range concurrentJoinTrials {
-		nick := fmt.Sprintf("reused%d", trial)
-		crowd := fmt.Sprintf("#crowd%d", trial)
-		shared := fmt.Sprintf("#shared%d", trial)
-		quitterSID := createSession(ctx, t, env.db, nick)
+		t.Run(fmt.Sprintf("trial %d", trial), func(t *testing.T) {
+			t.Parallel()
 
-		for _, channel := range []string{crowd, shared} {
-			_, err := env.svc.JoinChannel(ctx, quitterSID, 0, nick, channel, "")
-			if err != nil {
-				t.Fatalf("join %s: %v", channel, err)
-			}
+			checkQuitQueuedAheadOfJoin(t, newTestEnv(t))
+		})
+	}
+}
+
+// checkQuitQueuedAheadOfJoin runs one trial of
+// TestQuitQueuedAheadOfNewNickHoldersJoin on env.
+func checkQuitQueuedAheadOfJoin(t *testing.T, env *testEnv) {
+	t.Helper()
+
+	const (
+		nick        = "reused"
+		crowd       = "#crowd"
+		shared      = "#shared"
+		watcherNick = "watcher"
+	)
+
+	ctx := t.Context()
+	quitterSID := createSession(ctx, t, env.db, nick)
+
+	for _, channel := range []string{crowd, shared} {
+		_, err := env.svc.JoinChannel(ctx, quitterSID, 0, nick, channel, "")
+		if err != nil {
+			t.Fatalf("join %s: %v", channel, err)
 		}
+	}
 
-		for member := range quitCrowdSize {
-			memberNick := fmt.Sprintf("crowd%dx%d", trial, member)
-			memberSID := createSession(ctx, t, env.db, memberNick)
+	for member := range quitCrowdSize {
+		memberNick := fmt.Sprintf("crowd%d", member)
+		memberSID := createSession(ctx, t, env.db, memberNick)
 
-			_, err := env.svc.JoinChannel(ctx, memberSID, 0, memberNick, crowd, "")
-			if err != nil {
-				t.Fatalf("join %s: %v", memberNick, err)
-			}
+		_, err := env.svc.JoinChannel(ctx, memberSID, 0, memberNick, crowd, "")
+		if err != nil {
+			t.Fatalf("join %s: %v", memberNick, err)
 		}
+	}
 
-		watcherNick := fmt.Sprintf("watcher%d", trial)
+	watcherSID, watcherClientID, _, err := env.db.CreateSession(
+		ctx, watcherNick, watcherNick, "localhost", "127.0.0.1",
+	)
+	if err != nil {
+		t.Fatalf("create session %s: %v", watcherNick, err)
+	}
 
-		watcherSID, watcherClientID, _, err := env.db.CreateSession(
-			ctx, watcherNick, watcherNick, "localhost", "127.0.0.1",
+	_, err = env.svc.JoinChannel(ctx, watcherSID, 0, watcherNick, shared, "")
+	if err != nil {
+		t.Fatalf("join %s: %v", watcherNick, err)
+	}
+
+	_, lastQueueID, err := env.db.PollMessages(ctx, watcherClientID, 0, 0)
+	if err != nil {
+		t.Fatalf("poll: %v", err)
+	}
+
+	errs := runConcurrently(
+		func() error {
+			env.svc.BroadcastQuit(ctx, quitterSID, nick, "")
+
+			return nil
+		},
+		func() error {
+			return takeNickAndJoin(ctx, env, nick, shared)
+		},
+	)
+	if errs[1] != nil {
+		t.Fatalf("new session: %v", errs[1])
+	}
+
+	msgs, _, err := env.db.PollMessages(
+		ctx, watcherClientID, lastQueueID, 0,
+	)
+	if err != nil {
+		t.Fatalf("poll: %v", err)
+	}
+
+	commands := commandsFrom(msgs, nick)
+	if !slices.Equal(commands, []string{irc.CmdQuit, irc.CmdJoin}) {
+		t.Errorf(
+			"watcher got %v from %s, want QUIT then JOIN",
+			commands, nick,
 		)
-		if err != nil {
-			t.Fatalf("create session %s: %v", watcherNick, err)
-		}
-
-		_, err = env.svc.JoinChannel(ctx, watcherSID, 0, watcherNick, shared, "")
-		if err != nil {
-			t.Fatalf("join %s: %v", watcherNick, err)
-		}
-
-		_, lastQueueID, err := env.db.PollMessages(ctx, watcherClientID, 0, 0)
-		if err != nil {
-			t.Fatalf("poll: %v", err)
-		}
-
-		errs := runConcurrently(
-			func() error {
-				env.svc.BroadcastQuit(ctx, quitterSID, nick, "")
-
-				return nil
-			},
-			func() error {
-				return takeNickAndJoin(ctx, env, nick, shared)
-			},
-		)
-		if errs[1] != nil {
-			t.Fatalf("trial %d: new session: %v", trial, errs[1])
-		}
-
-		msgs, _, err := env.db.PollMessages(
-			ctx, watcherClientID, lastQueueID, 0,
-		)
-		if err != nil {
-			t.Fatalf("poll: %v", err)
-		}
-
-		commands := commandsFrom(msgs, nick)
-		if !slices.Equal(commands, []string{irc.CmdQuit, irc.CmdJoin}) {
-			t.Errorf(
-				"trial %d: watcher got %v from %s, want QUIT then JOIN",
-				trial, commands, nick,
-			)
-		}
 	}
 }
 
@@ -691,6 +701,8 @@ func commandsFrom(msgs []db.IRCMessage, nick string) []string {
 // into a +i channel uses the invite up, so that a JOIN
 // after leaving gets ERR_INVITEONLYCHAN.
 func TestJoinUsesUpInvite(t *testing.T) {
+	t.Parallel()
+
 	const channel = "#club"
 
 	env := newTestEnv(t)
@@ -736,6 +748,8 @@ func TestJoinUsesUpInvite(t *testing.T) {
 // session's nick, username and hostname refuses its JOIN
 // with ERR_BANNEDFROMCHAN.
 func TestJoinRefusedByHostmaskBan(t *testing.T) {
+	t.Parallel()
+
 	const channel = "#club"
 
 	env := newTestEnv(t)
@@ -774,6 +788,8 @@ func TestJoinRefusedByHostmaskBan(t *testing.T) {
 // keeps a channel other members are still on and deletes
 // the channel when its last member parts.
 func TestPartDeletesChannelOnlyWhenEmpty(t *testing.T) {
+	t.Parallel()
+
 	const channel = "#room"
 
 	env := newTestEnv(t)
@@ -821,6 +837,8 @@ func TestPartDeletesChannelOnlyWhenEmpty(t *testing.T) {
 // TestKickOfLastMemberDeletesChannel checks that a KICK
 // that leaves a channel with no members deletes it.
 func TestKickOfLastMemberDeletesChannel(t *testing.T) {
+	t.Parallel()
+
 	const channel = "#room"
 
 	env := newTestEnv(t)
@@ -845,6 +863,8 @@ func TestKickOfLastMemberDeletesChannel(t *testing.T) {
 }
 
 func TestSendChannelMessage(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -892,6 +912,8 @@ func TestSendChannelMessage(t *testing.T) {
 }
 
 func TestBroadcastQuit(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -929,6 +951,8 @@ func TestBroadcastQuit(t *testing.T) {
 // error as a DM to an unknown nick. The trigger deletes the
 // target's session just before the DM is stored.
 func TestSendDirectMessageTargetQuits(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -960,6 +984,8 @@ func TestSendDirectMessageTargetQuits(t *testing.T) {
 // trigger deletes the channel just before the message is
 // stored.
 func TestSendChannelMessageChannelDeleted(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -991,6 +1017,8 @@ func TestSendChannelMessageChannelDeleted(t *testing.T) {
 }
 
 func TestSendChannelMessage_Moderated(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -1042,6 +1070,8 @@ func TestSendChannelMessage_Moderated(t *testing.T) {
 // not spend its hashcash stamp: the operator can then send
 // the same message with it.
 func TestRefusedChannelMessageLeavesStampUnspent(t *testing.T) {
+	t.Parallel()
+
 	const (
 		channel = "#paid"
 		bits    = 2
@@ -1067,6 +1097,8 @@ func TestRefusedChannelMessageLeavesStampUnspent(t *testing.T) {
 
 	for _, refusal := range refusals {
 		t.Run(refusal.name, func(t *testing.T) {
+			t.Parallel()
+
 			env := newTestEnv(t)
 			ctx := t.Context()
 
@@ -1119,6 +1151,8 @@ func TestRefusedChannelMessageLeavesStampUnspent(t *testing.T) {
 }
 
 func TestQueryUserMode(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -1169,6 +1203,8 @@ func TestQueryUserMode(t *testing.T) {
 }
 
 func TestUserhostReply(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 	ctx := t.Context()
 
@@ -1274,10 +1310,14 @@ func applyUserModeTests() []applyUserModeTest {
 }
 
 func TestApplyUserMode(t *testing.T) {
+	t.Parallel()
+
 	env := newTestEnv(t)
 
 	for i, test := range applyUserModeTests() {
 		t.Run(test.modeStr, func(t *testing.T) {
+			t.Parallel()
+
 			ctx := t.Context()
 			sid := createSession(
 				ctx, t, env.db, fmt.Sprintf("user%d", i),