F3 SLICE-4: persistence/re-anchor/orphan decision-logic tests (INV-1/INV-6) (#6)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-10 10:01:49 -07:00
parent d05cb0f9d4
commit 4b27acfcae
2 changed files with 80 additions and 0 deletions
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+import { describe, it, expect } from "vitest";
+import { buildFingerprint, resolve } from "../src/anchorer";
+import { applyChange, type LiveSpan } from "../src/attributionTracker";
+import type { Provenance } from "../src/model";
+
+const HUMAN: Provenance = { kind: "human", id: "ben" };
+const DOC = "intro\nClaude wrote this sentence here.\noutro\n";
+
+function liveSpan(): LiveSpan {
+  const start = DOC.indexOf("Claude wrote this sentence");
+  return {
+    id: "at_1", start, end: start + "Claude wrote this sentence".length,
+    author: { kind: "agent", id: "claude", agent: { sdk: "@cline/sdk", model: "sonnet", sessionId: "r1" } },
+    createdAt: "2026-06-10T00:00:00.000Z",
+  };
+}
+
+describe("attribution persistence decision logic (SLICE-4, spec §6.5 PUC-4)", () => {
+  it("save → reload: fingerprint built from the live span resolves to the same range", () => {
+    const s = liveSpan();
+    const fp = buildFingerprint(DOC, { start: s.start, end: s.end });
+    expect(resolve(DOC, fp)).toEqual({ start: s.start, end: s.end });
+  });
+
+  it("external edit above: fingerprint re-resolves at the moved range", () => {
+    const s = liveSpan();
+    const fp = buildFingerprint(DOC, { start: s.start, end: s.end });
+    const edited = "a new line\n" + DOC;
+    const moved = edited.indexOf("Claude wrote this sentence");
+    expect(resolve(edited, fp)).toEqual({ start: moved, end: moved + (s.end - s.start) });
+  });
+
+  it("anchored text mangled: orphaned, never guessed (INV-1/INV-6)", () => {
+    const s = liveSpan();
+    const fp = buildFingerprint(DOC, { start: s.start, end: s.end });
+    const mangled = DOC.replace("Claude wrote this sentence", "Someone rewrote everything");
+    expect(resolve(mangled, fp)).toBe("orphaned");
+  });
+
+  it("in-session edits keep the live span fingerprint-able (tracker → anchorer round trip)", () => {
+    let spans = [liveSpan()];
+    let doc = DOC;
+    const insertAt = DOC.indexOf("intro") + "intro".length;
+    const inserted = " (note)";
+    doc = doc.slice(0, insertAt) + inserted + doc.slice(insertAt);
+    spans = applyChange(spans, { start: insertAt, end: insertAt, newLength: inserted.length }, HUMAN, {
+      newId: () => "n1", now: () => "2026-06-10T01:00:00.000Z",
+    });
+    const agent = spans.find((x) => x.author.kind === "agent")!;
+    expect(doc.slice(agent.start, agent.end)).toBe("Claude wrote this sentence");
+    const fp = buildFingerprint(doc, { start: agent.start, end: agent.end });
+    expect(resolve(doc, fp)).toEqual({ start: agent.start, end: agent.end });
+  });
+});