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`repair-flywheel.test.ts`

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repair-flywheel.test.tsBlame101 lines · 1 contributor

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e6bad81Claude	1	/**
	2	* Tests for the deterministic parts of the flywheel: failure normalisation
	3	* and fingerprinting. The DB-touching functions are exercised in higher-
	4	* level integration tests against a live Postgres.
	5	*
	6	* Goal: prove that failures with the same root cause but different variable
	7	* bits (line numbers, paths, timestamps, hashes) collapse to the same
	8	* signature. That's the property that makes the cache work.
	9	*/
	10	import { describe, expect, it } from "bun:test";
	11	import { fingerprint, normaliseFailure } from "../lib/repair-flywheel";
	12
	13	describe("normaliseFailure", () => {
	14	it("strips line + column numbers", () => {
	15	const a = normaliseFailure("Error at /opt/app/src/foo.ts:42:13");
	16	const b = normaliseFailure("Error at /opt/app/src/foo.ts:1099:7");
	17	expect(a).toBe(b);
	18	});
	19
	20	it("strips ISO-8601 timestamps", () => {
	21	const a = normaliseFailure("Failed at 2026-05-08T22:14:15.123Z");
	22	const b = normaliseFailure("Failed at 2025-01-01T00:00:00Z");
	23	expect(a).toBe(b);
	24	});
	25
	26	it("strips full SHA-1 commit hashes", () => {
	27	const a = normaliseFailure("revert b0a3ba2c1d4e5f6a7b8c9d0e1f2a3b4c5d6e7f80");
	28	const b = normaliseFailure("revert deadbeefcafebabedeadbeefcafebabedeadbeef");
	29	expect(a).toBe(b);
	30	});
	31
	32	it("strips UUIDs", () => {
	33	const a = normaliseFailure(
	34	"request-id 550e8400-e29b-41d4-a716-446655440000 failed",
	35	);
	36	const b = normaliseFailure(
	37	"request-id 6ba7b810-9dad-11d1-80b4-00c04fd430c8 failed",
	38	);
	39	expect(a).toBe(b);
	40	});
	41
	42	it("strips absolute paths on linux + windows", () => {
	43	const a = normaliseFailure("ENOENT /home/runner/work/foo/bar.ts");
	44	const b = normaliseFailure("ENOENT /tmp/runner/zzz/bar.ts");
	45	const c = normaliseFailure("ENOENT C:\\Users\\runner\\bar.ts");
	46	expect(a).toBe(b);
	47	expect(a).toBe(c);
	48	});
	49
	50	it("strips ANSI colour codes", () => {
	51	const a = normaliseFailure("\x1b[31merror:\x1b[0m lockfile mismatch");
	52	const b = normaliseFailure("error: lockfile mismatch");
	53	expect(a).toBe(b);
	54	});
	55
	56	it("strips quoted strings (often contain user data)", () => {
	57	const a = normaliseFailure(`expected 'alice@example.com' to match pattern`);
	58	const b = normaliseFailure(`expected 'bob@other.com' to match pattern`);
	59	expect(a).toBe(b);
	60	});
	61
	62	it("collapses whitespace + lowercases", () => {
	63	const a = normaliseFailure("ERROR: Lockfile out of sync");
	64	const b = normaliseFailure("error: lockfile out of sync");
	65	expect(a).toBe(b);
	66	});
	67
	68	it("does NOT collapse genuinely different errors", () => {
	69	const a = normaliseFailure("error: lockfile is out of sync");
	70	const b = normaliseFailure("TypeError: cannot read property of undefined");
	71	expect(a).not.toBe(b);
	72	});
	73	});
	74
	75	describe("fingerprint", () => {
	76	it("produces a 32-char hex string", () => {
	77	const sig = fingerprint("any failure text");
	78	expect(sig).toMatch(/^[0-9a-f]{32}$/);
	79	});
	80
	81	it("is stable across calls", () => {
	82	const text = "error: bun install failed: lockfile mismatch at line 42";
	83	expect(fingerprint(text)).toBe(fingerprint(text));
	84	});
	85
	86	it("collapses semantically-identical failures to one signature", () => {
	87	const a = fingerprint(
	88	"TypeError at /home/runner/work/proj/src/foo.ts:42:13 in commit b0a3ba2c1d4e5f6a7b8c9d0e1f2a3b4c5d6e7f80",
	89	);
	90	const b = fingerprint(
	91	"TypeError at /tmp/build/x/src/foo.ts:9999:1 in commit deadbeefcafebabedeadbeefcafebabedeadbeef",
	92	);
	93	expect(a).toBe(b);
	94	});
	95
	96	it("differs for genuinely different failures", () => {
	97	const a = fingerprint("error: lockfile is out of sync");
	98	const b = fingerprint("TypeError: cannot read property of undefined");
	99	expect(a).not.toBe(b);
	100	});
	101	});