Initial curated projectbrain source from 8a7b1e0651dbdab97d744cbd2e653ab3970ac6c5

backend/test/analysisStrategy.test.ts

@@ -0,0 +1,18 @@
+import { describe, expect, it } from "vitest";
+import { chooseAnalysisStrategy, findingFingerprint, groupFindingRootCauses } from "../src/services/analysisStrategy.js";
+
+describe("analysis strategy", () => {
+  it("prioritizes changed-area analysis inside the budget", () => {
+    expect(chooseAnalysisStrategy({ changedPaths: ["src/a.ts", "src/b.ts"], now: 100, lastFullScanAt: new Date(0).toISOString() })).toMatchObject({ strategy: "diff", estimatedScope: "changed-area" });
+  });
+
+  it("uses targeted analysis while a full scan is fresh", () => {
+    expect(chooseAnalysisStrategy({ now: 100_000, lastFullScanAt: new Date(99_000).toISOString(), activeFindingCount: 2, staleAfterMs: 10_000 })).toMatchObject({ strategy: "targeted" });
+    expect(chooseAnalysisStrategy({ now: 100_000, lastFullScanAt: new Date(0).toISOString(), staleAfterMs: 10_000 }).strategy).toBe("full");
+  });
+
+  it("normalizes fingerprints and groups repeated root causes", () => {
+    expect(findingFingerprint({ ruleCode: "CI_FAILED", path: "src\\a123.ts", subject: "run 42" })).toBe("ci_failed|src/a#.ts|run #");
+    expect(groupFindingRootCauses([{ fingerprint: "a", ruleCode: "CI", subject: "workflow", rootCause: "runner" }, { fingerprint: "b", ruleCode: "CI", subject: "workflow", rootCause: "runner" }])).toEqual([{ rootCause: "runner", fingerprints: ["a", "b"] }]);
+  });
+});