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feat(FN-5440): test merger cwd-fallback guards for fn-5440

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Test coverage hardening for FN-5440: adds stronger interaction tests across three steps covering the cwd-integration-fallback-removed path and the merge-reuse-task-worktree early fast-path, including expanded fallback audit tripwires and hardened metadata literal guards. No production code changes.

Fusion-Task-Id: FN-5440
This commit is contained in:
Fusion (runfusion.ai)
2026-05-21 15:55:27 -07:00
committed by gsxdsm
parent 216c32bfe5
commit a3ace52995
2 changed files with 23 additions and 5 deletions
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4
packages/engine/src/__tests__/reliability-interactions/merge-reuse-task-worktree.test.ts
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@@ -676,6 +676,8 @@ describe("FN-5279 reliability interactions: merge reuse task worktree", () => {
expect(auditTypes).toContain("merge:reuse-fallback-new-worktree");
expect(auditTypes).toContain("merge:reuse-handoff-acquired");
expect(auditTypes).not.toContain("merge:reuse-fallback-cwd-main");
expect(auditTypes).not.toContain("merge:reuse-fallback-cwd-integration-branch");
expect(auditTypes).not.toContain("merge:cwd-integration-fallback-removed");
const fallback = audits.find((event) => event.mutationType === "merge:reuse-fallback-new-worktree");
expect(fallback?.metadata).toMatchObject({
reason: "missing-task-worktree",
@@ -686,7 +688,7 @@ describe("FN-5279 reliability interactions: merge reuse task worktree", () => {
}
}, 30_000);
it.skipIf(!hasGit)("cwd-main mode stays on the legacy path and emits no reuse handoff events", async () => {
it.skipIf(!hasGit)("cwd-main legacy alias is normalized to cwd-integration-branch and stays on the opt-in path with no reuse handoff events", async () => {
const fixture = await makeReliabilityFixture({
taskId: "FN-5279-RI-CWD-MAIN",
settings: {