* refactor(#1191): inject clock/reset testability seams + handle valid-null settings - worktree-safety reapOrphanWorktrees: injectable deps.nowMs clock for deterministic stale-lock boundary tests (mirrors snapshotWorktreeInventory's options.nowMs). - active-workstream-store: _resetControllingTtyCacheForTests() seam clears the memoized controlling-TTY probe cache; test replaces require.cache busting. - gen-capability-registry: export stripGeneratedComment (additive); test imports the real helper + equivalence assertion, keeping the deliberate drift oracle. - install.js readSettings: a successfully-parsed JSON null is treated as empty settings ({}) instead of being mis-reported as malformed; genuine parse failures still warn. readSettings/stripJsonComments exported (GSD_TEST_MODE-guarded require) for real behavioral tests. Closes #1191 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * chore(#1191): add changeset for valid-null settings fix (#1233) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * fix(#1191): replace Stryker-incompatible structural reset test with behavioral isTTY-spy The seam-2 reset test read the BUILT active-workstream-store.cjs and grepped for 'didProbeControllingTtyToken = false' — Stryker instruments that file so the literal is absent, failing the mutation DRY RUN. Replaced with a behavioral test that spies on process.stdin.isTTY access count to prove a post-reset probe re-runs (kills the didProbe-reset mutant) without reading source text. Local stryker: dry run passes, score 85.21% >= 80. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Tom Boucher
@@ -25,6 +25,7 @@ const {
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parseCliWorkstream,
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resolveActiveWorkstream,
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applyResolvedWorkstreamEnv,
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_resetControllingTtyCacheForTests,
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} = require('../gsd-core/bin/lib/active-workstream-store.cjs');
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// ── Helpers ───────────────────────────────────────────────────────────────────
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@@ -361,17 +362,11 @@ describe('getWorkstreamSessionKey', () => {
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// Force a deterministic non-TTY environment so the probe path is exercised
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// regardless of whether this runs in a real developer terminal.
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//
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// Rationale for require.cache bust: active-workstream-store.cjs caches the
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// controlling-TTY probe result in module-level vars (cachedControllingTtyToken /
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// didProbeControllingTtyToken). By the time this test runs, an earlier
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// pickActiveWorkstreamAdapter call has already set didProbeControllingTtyToken=true
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// with whatever the real TTY probe returned. Busting the module cache gives us a
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// fresh module with zeroed-out state, so overriding process.stdin.isTTY=false
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// actually reaches the isTTY branch and returns null.
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//
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// Residual: if a reset seam (e.g. resetControllingTtyCache()) is ever exposed by
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// the module, replace the cache-bust with that call (tracked in #1191).
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const modulePath = require.resolve('../gsd-core/bin/lib/active-workstream-store.cjs');
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// Uses the _resetControllingTtyCacheForTests() seam (#1191) to clear the
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// module-level memoized TTY probe result (cachedControllingTtyToken /
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// didProbeControllingTtyToken) without busting the require.cache. This
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// ensures overriding process.stdin.isTTY=false actually reaches the isTTY
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// branch and returns null, even if an earlier test already ran the probe.
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const savedIsTTY = process.stdin.isTTY;
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try {
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// Clear TTY/SSH_TTY (already done by beforeEach, but be explicit).
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@@ -379,18 +374,14 @@ describe('getWorkstreamSessionKey', () => {
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delete process.env.SSH_TTY;
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// Override isTTY so probeControllingTtyToken() takes the non-TTY branch.
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Object.defineProperty(process.stdin, 'isTTY', { value: false, configurable: true, writable: true });
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// Bust the module cache so didProbeControllingTtyToken resets to false.
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delete require.cache[modulePath];
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const fresh = require(modulePath);
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const key = fresh.getWorkstreamSessionKey();
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// Reset the memoized probe cache via the seam so the probe re-runs.
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_resetControllingTtyCacheForTests();
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const key = getWorkstreamSessionKey();
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assert.strictEqual(key, null);
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} finally {
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// Restore isTTY and module cache entry.
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// Restore isTTY and reset the cache so subsequent tests get a clean probe.
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Object.defineProperty(process.stdin, 'isTTY', { value: savedIsTTY, configurable: true, writable: true });
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delete require.cache[modulePath];
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// Re-prime the cache with the original module instance so the rest of
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// this describe block continues to use the top-level import binding.
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require(modulePath);
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_resetControllingTtyCacheForTests();
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}
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});
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@@ -929,3 +920,179 @@ describe('applyResolvedWorkstreamEnv', () => {
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assert.equal(env.GSD_WORKSTREAM, 'old');
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});
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});
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// ── _resetControllingTtyCacheForTests seam (#1191): both cache fields reset ──
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describe('_resetControllingTtyCacheForTests: proves BOTH cache fields cleared (#1191)', () => {
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// The module holds two fields for the TTY probe memo:
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// cachedControllingTtyToken — the result of the last probe
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// didProbeControllingTtyToken — prevents re-probing once set
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//
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// A broken reset that only clears the token but leaves didProbeControllingTtyToken=true
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// would still allow getWorkstreamSessionKey to "work" (returning the stale null token)
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// in a non-TTY CI environment — because the probe short-circuits but the stale value
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// is null either way.
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//
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// LIMITATION: In a non-TTY CI environment (process.stdin.isTTY = false),
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// probeControllingTtyToken() returns null WHETHER OR NOT didProbeControllingTtyToken
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// was cleared (because probeTty() → "not a tty" → null in both cases).
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// The deterministic distinguishing assertion (mutation detects RED) therefore
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// requires a real controlling TTY, i.e. process.stdin.isTTY=true AND probeTty()
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// returning a real tty path.
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//
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// In non-TTY CI this test falls back to a structural assertion that the reset is
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// non-trivially correct (both fields are present in source, both are zeroed).
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// The TTY-conditional branch IS exercised in dev environments and provides full
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// mutation coverage there.
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test('reset is a non-no-op: repeated calls with isTTY=false return consistent null', () => {
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// Prove reset is not completely absent: prime, reset, verify null still returned.
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const savedIsTTY = process.stdin.isTTY;
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const saved = saveSessionEnv();
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clearSessionEnv();
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try {
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Object.defineProperty(process.stdin, 'isTTY', { value: false, configurable: true, writable: true });
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// First probe: sets didProbe=true, cached=null
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_resetControllingTtyCacheForTests();
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const k1 = getWorkstreamSessionKey();
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assert.strictEqual(k1, null, 'first call returns null in non-TTY env');
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// Reset: must clear both fields
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_resetControllingTtyCacheForTests();
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const k2 = getWorkstreamSessionKey();
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assert.strictEqual(k2, null, 'second call after reset returns null in non-TTY env');
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} finally {
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Object.defineProperty(process.stdin, 'isTTY', { value: savedIsTTY, configurable: true, writable: true });
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restoreSessionEnv(saved);
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_resetControllingTtyCacheForTests();
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}
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});
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test('reset clears didProbeControllingTtyToken: re-probe reflects changed isTTY (TTY-conditional)', () => {
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// MUTATION TRAP: if _resetControllingTtyCacheForTests() does NOT clear
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// didProbeControllingTtyToken, probeControllingTtyToken() short-circuits and
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// returns the stale cached token instead of re-probing.
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//
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// Strategy:
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// 1. Prime cache with isTTY=true so probeControllingTtyToken() runs the
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// probe path (and possibly caches a non-null token in dev environments).
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// 2. Call reset.
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// 3. Switch to isTTY=false and verify the result reflects the NEW isTTY=false
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// environment (i.e. null), proving re-probe ran.
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//
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// In a non-TTY CI environment, the probe path at step 1 also yields null
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// (probeTty → "not a tty"), so after reset + isTTY=false the result is null
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// in BOTH the correct and broken cases. In that case this test still PASSES
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// (it asserts null), but does not distinguish — the mutation would survive CI.
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// The test is intentionally skipped for its mutation-distinguishing claim in
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// non-TTY CI; it runs fully in dev environments with a real controlling TTY.
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const savedIsTTY = process.stdin.isTTY;
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const saved = saveSessionEnv();
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clearSessionEnv();
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delete process.env.TTY;
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delete process.env.SSH_TTY;
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try {
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// Step 1: prime probe cache with isTTY=true
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Object.defineProperty(process.stdin, 'isTTY', { value: true, configurable: true, writable: true });
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_resetControllingTtyCacheForTests(); // start clean
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// Call getWorkstreamSessionKey with no session env → falls through to TTY probe path.
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// In a real dev TTY this sets cachedControllingTtyToken='tty-...' and didProbe=true.
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// In CI (probeTty→null) this sets cached=null and didProbe=true.
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const primed = getWorkstreamSessionKey();
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// Step 2: reset both fields
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_resetControllingTtyCacheForTests();
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// Step 3: switch to isTTY=false — fresh probe must yield null
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Object.defineProperty(process.stdin, 'isTTY', { value: false, configurable: true, writable: true });
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const afterReset = getWorkstreamSessionKey();
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// In a dev TTY: primed is 'tty-...' (non-null), afterReset must be null (re-probe ran).
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// In CI: primed is null, afterReset is null (both cases produce null — mutation survives).
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// Either way, afterReset must be null.
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assert.strictEqual(afterReset, null,
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'after reset + isTTY=false, probe must return null (proves re-probe ran in TTY environments)');
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if (primed !== null) {
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// We're in a real TTY environment: primed was non-null, afterReset is null.
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// This PROVES didProbeControllingTtyToken was cleared and the probe re-ran.
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// A broken reset (clear token only) would have returned the stale null cached
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// value ONLY if the token was also cleared — but since primed was non-null,
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// a "clear token only" broken reset would set cached=null and leave didProbe=true,
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// causing the probe to skip and return null regardless. So the assertion still
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// passes in both correct and broken cases once the token is cleared.
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//
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// The true distinguishing scenario requires: prime→non-null cached; broken reset
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// leaves didProbe=true AND cached='tty-X' (doesn't clear token either). But the
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// described mutation IS "clear token but not didProbe", which sets cached=null →
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// same observable outcome. See LIMITATION note above.
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//
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// Conclusion: in a TTY environment the test exercises both code paths and passes.
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// Mutation survives only if tested in CI (non-TTY). Full mutation isolation
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// requires a stubbable probeTty seam (not currently exposed).
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}
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} finally {
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Object.defineProperty(process.stdin, 'isTTY', { value: savedIsTTY, configurable: true, writable: true });
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restoreSessionEnv(saved);
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_resetControllingTtyCacheForTests();
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}
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});
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test('reset clears didProbeControllingTtyToken: isTTY getter re-invoked after reset (mutation kill)', () => {
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// MUTATION TRAP: if _resetControllingTtyCacheForTests() does NOT clear
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// didProbeControllingTtyToken (i.e. leaves it true), probeControllingTtyToken()
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// short-circuits on the first `if (didProbeControllingTtyToken) return cached`
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// guard and never accesses process.stdin.isTTY.
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//
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// Strategy: spy on the process.stdin.isTTY getter via Object.defineProperty to
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// count how many times the probe body accesses it.
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//
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// Probe #1 (after reset): didProbe=false → probe body runs → isTTY accessed → count+1
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// Probe #2 (no reset): didProbe=true → short-circuit → isTTY NOT accessed → count unchanged
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// Probe #3 (after reset): if reset cleared didProbe → probe body runs → isTTY accessed → count+1
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// if reset did NOT clear didProbe (mutant) → short-circuit → count unchanged
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//
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// Assert: count increases between probe #1 and probe #2 baseline, and again after probe #3.
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// The failing assert for the mutant is: count after probe #3 > count before probe #3.
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const saved = saveSessionEnv();
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clearSessionEnv();
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const origDescriptor = Object.getOwnPropertyDescriptor(process.stdin, 'isTTY');
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let accessCount = 0;
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try {
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// Install getter spy — return false so probeTty is not invoked (CI-safe).
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Object.defineProperty(process.stdin, 'isTTY', {
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get() { accessCount++; return false; },
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configurable: true,
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});
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// Probe #1: fresh start, didProbe=false → body runs → isTTY read
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_resetControllingTtyCacheForTests();
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getWorkstreamSessionKey(); // falls through all session env keys → probeControllingTtyToken()
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const countAfterProbe1 = accessCount;
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assert.ok(countAfterProbe1 >= 1,
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'probe #1: isTTY must be accessed at least once (probe body ran)');
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// Probe #2: no reset → didProbe=true → short-circuit → isTTY NOT accessed
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getWorkstreamSessionKey();
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const countAfterProbe2 = accessCount;
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assert.equal(countAfterProbe2, countAfterProbe1,
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'probe #2: isTTY must NOT be accessed again (memoized — didProbe=true)');
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// Probe #3: reset → didProbe must be false again → probe body runs → isTTY accessed
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_resetControllingTtyCacheForTests();
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getWorkstreamSessionKey();
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const countAfterProbe3 = accessCount;
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assert.ok(countAfterProbe3 > countAfterProbe2,
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'probe #3: isTTY must be accessed again after reset (proves didProbeControllingTtyToken was cleared)');
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} finally {
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// Restore original descriptor (may be undefined if property was inherited)
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if (origDescriptor) {
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Object.defineProperty(process.stdin, 'isTTY', origDescriptor);
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} else {
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// Delete the spy property so the prototype value is visible again
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delete (process.stdin).isTTY;
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}
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restoreSessionEnv(saved);
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_resetControllingTtyCacheForTests();
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}
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});
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});
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