test(FN-4748): complete Step 2 — reproduce tracking gaps with failing tests

Fusion-Task-Id: FN-4748
Fusion-Task-Lineage: b540f985-c20f-438e-8290-a07531c6612c

packages/dashboard/src/__tests__/github-tracking-reconciler.test.ts

@@ -0,0 +1,54 @@
+import { describe, expect, it, vi, type Mock } from "vitest";
+import type { TaskStore } from "@fusion/core";
+import { GitHubTrackingReconciler } from "../github-tracking-reconciler.js";
+
+const { mockGetIssue, mockSetIssueState } = vi.hoisted(() => ({
+  mockGetIssue: vi.fn(),
+  mockSetIssueState: vi.fn(),
+}));
+
+const { mockResolveGithubTrackingAuth } = vi.hoisted(() => ({
+  mockResolveGithubTrackingAuth: vi.fn(),
+}));
+
+vi.mock("../github.js", () => ({
+  GitHubClient: vi.fn().mockImplementation(() => ({
+    getIssue: (...args: unknown[]) => mockGetIssue(...args),
+    setIssueState: (...args: unknown[]) => mockSetIssueState(...args),
+  })),
+}));
+
+vi.mock("../github-auth.js", () => ({
+  resolveGithubTrackingAuth: (...args: unknown[]) => mockResolveGithubTrackingAuth(...args),
+}));
+
+function createStore(tasks: Array<Record<string, unknown>>): TaskStore {
+  return {
+    listTasks: vi.fn().mockResolvedValue(tasks),
+    logEntry: vi.fn().mockResolvedValue(undefined),
+    getSettings: vi.fn().mockResolvedValue({ githubAuthMode: "token", githubAuthToken: "ghp_test" }),
+    getGlobalSettingsStore: vi.fn(() => ({ getSettings: vi.fn().mockResolvedValue({}) })),
+  } as unknown as TaskStore;
+}
+
+describe("GitHubTrackingReconciler", () => {
+  it("closes already-done tasks whose linked issue is still open", async () => {
+    mockResolveGithubTrackingAuth.mockReturnValue({ ok: true, auth: { mode: "token", token: "ghp_test" } });
+    mockGetIssue.mockResolvedValue({ state: "open" });
+    const store = createStore([
+      {
+        id: "FN-1",
+        status: "done",
+        githubTracking: {
+          enabled: true,
+          issue: { owner: "owner", repo: "repo", number: 42 },
+        },
+      },
+    ]);
+
+    const reconciler = new GitHubTrackingReconciler();
+    await reconciler.reconcile(store);
+
+    expect(mockSetIssueState).toHaveBeenCalledWith("owner", "repo", 42, "closed", "completed");
+  });
+});