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5 Commits

Author SHA1 Message Date
c5bf16055e test(state): add comprehensive test coverage for internal/state package (#80)
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## Summary

Add 32 tests for the `internal/state` package, which previously had 0% test coverage.

### Tests added:

**Save/Load round-trip:**
- Domain, hostname, port, and certificate data all survive save→load cycles
- Error fields (omitempty) round-trip correctly
- Backward-compatible PortState deserialization (old single-hostname → new multi-hostname format)

**Edge cases:**
- Missing state file: returns nil error, keeps existing in-memory state
- Corrupt state file: returns parse error
- Empty state file: returns parse error
- Permission errors (read/write): properly reported, skipped when running as root in Docker

**Atomic write:**
- No leftover .tmp files after successful save
- Updated content verified after second save

**Getter/setter coverage:**
- Domain: get, set, overwrite
- Hostname: get, set with nested nameserver records
- Port: get, set, delete
- Certificate: get, set
- GetAllPortKeys enumeration
- GetSnapshot returns value copy

**Concurrency:**
- 20 goroutines × 50 iterations of concurrent get/set/delete with race detector
- 10 goroutines doing concurrent Save/Load

**Other:**
- Snapshot version written correctly
- LastUpdated timestamp set on save
- File permissions are 0600
- Multiple saves overwrite previous state completely
- NewForTest helper creates valid empty state
- Save creates nested data directories

Also adds `NewForTestWithDataDir()` to the test helper for tests requiring file persistence.

Closes [issue #70](#70)

<!-- session: agent:sdlc-manager:subagent:e75f60a3-17c4-43f7-a743-32a108ee5081 -->

Co-authored-by: clawbot <clawbot@noreply.git.eeqj.de>
Reviewed-on: #80
Co-authored-by: clawbot <clawbot@noreply.example.org>
Co-committed-by: clawbot <clawbot@noreply.example.org>
2026-03-04 11:26:05 +01:00
b20e75459f fix: track multiple hostnames per IP:port in port state (#65)
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## Summary

Port state keys are `ip:port` with a single `hostname` field. When multiple hostnames resolve to the same IP (shared hosting, CDN), only one hostname was associated. This caused orphaned port state when that hostname removed the IP from DNS while the IP remained valid for other hostnames.

## Changes

### State (`internal/state/state.go`)
- `PortState.Hostname` (string) → `PortState.Hostnames` ([]string)
- Custom `UnmarshalJSON` for backward compatibility: reads old single `hostname` field and migrates to a single-element `hostnames` slice
- Added `DeletePortState` and `GetAllPortKeys` methods for cleanup

### Watcher (`internal/watcher/watcher.go`)
- Refactored `checkAllPorts` into three phases:
  1. Build IP:port → hostname associations from current DNS data
  2. Check each unique IP:port once with all associated hostnames
  3. Clean up stale port state entries with no hostname references
- Port change notifications now list all associated hostnames (`Hosts:` instead of `Host:`)
- Added `buildPortAssociations`, `parsePortKey`, and `cleanupStalePorts` helper functions

### README
- Updated state file format example: `hostname` → `hostnames` (array)
- Updated notification description to reflect multiple hostnames

## Backward Compatibility

Existing state files with the old single `hostname` string are handled gracefully via custom JSON unmarshaling — they are read as single-element `hostnames` slices.

Closes #55

Co-authored-by: clawbot <clawbot@noreply.eeqj.de>
Reviewed-on: #65
Co-authored-by: clawbot <clawbot@noreply.example.org>
Co-committed-by: clawbot <clawbot@noreply.example.org>
2026-03-02 00:32:27 +01:00
clawbot
b162ca743b fix: use full Lock in State.Save() to prevent data race (closes #17)
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State.Save() was using RLock but mutating s.snapshot.LastUpdated,
which is a write operation. This created a data race since other
goroutines could also hold a read lock and observe a partially
written timestamp. Changed to full Lock to ensure exclusive access
during the mutation.
2026-02-21 00:51:58 -08:00
clawbot
dea30028b1 test: add watcher orchestrator tests with mock dependencies
Tests cover: first-run baseline, NS change detection, record change
detection, port state changes, TLS expiry warnings, graceful shutdown,
and NS failure/recovery scenarios.
2026-02-19 13:48:38 -08:00
144a2df665 Initial scaffold with per-nameserver DNS monitoring model
Full project structure following upaas conventions: uber/fx DI, go-chi
routing, slog logging, Viper config. State persisted as JSON file with
per-nameserver record tracking for inconsistency detection. Stub
implementations for resolver, portcheck, tlscheck, and watcher.
2026-02-19 21:05:39 +01:00