源码快照 @ 2026-09-02 (source-only, 剔除非源码素材)

evals/specs/session-activity-snapshot-stability.test.ts

@@ -0,0 +1,56 @@
+import { expect } from "vitest";
+import { test } from "@openwork/testkit";
+
+import { useSessionActivityStore } from "../../apps/app/src/react-app/domains/session/status/session-activity-store";
+
+test("unchanged live-session seeds preserve the external-store snapshot", ({ evidence }) => {
+  const workspaceId = "workspace-snapshot-stability";
+  const sessionId = "session-snapshot-stability";
+  useSessionActivityStore.setState({ recordsByWorkspaceId: {}, statusesByWorkspaceId: {} });
+
+  useSessionActivityStore.getState().seedWorkspaceSessions(
+    workspaceId,
+    [{ id: sessionId, status: { type: "idle" } }],
+  );
+  const initialSnapshot = useSessionActivityStore.getState();
+  let notifications = 0;
+  const unsubscribe = useSessionActivityStore.subscribe(() => {
+    notifications += 1;
+  });
+
+  // More repeated seeds than React's nested-update guard must remain true
+  // no-ops so a passive external-store subscriber cannot feed itself.
+  for (let index = 0; index < 60; index += 1) {
+    useSessionActivityStore.getState().seedWorkspaceSessions(
+      workspaceId,
+      [{ id: sessionId, status: { type: "idle" } }],
+    );
+  }
+
+  const stableSnapshot = useSessionActivityStore.getState() === initialSnapshot;
+  evidence.recordAssertionEvidence(
+    "Repeated unchanged live-session seeds preserve the external-store snapshot",
+    `After 60 identical seeds, snapshot identity remained stable=${stableSnapshot} and subscriber notifications=${notifications}.`,
+    stableSnapshot && notifications === 0,
+  );
+  expect(useSessionActivityStore.getState()).toBe(initialSnapshot);
+  expect(notifications).toBe(0);
+
+  // Negative half: a real activity transition still publishes once.
+  useSessionActivityStore.getState().seedWorkspaceSessions(
+    workspaceId,
+    [{ id: sessionId, status: { type: "busy" } }],
+  );
+  unsubscribe();
+
+  const changedSnapshot = useSessionActivityStore.getState() !== initialSnapshot;
+  const changedStatus = useSessionActivityStore.getState().getStatus(workspaceId, sessionId);
+  evidence.recordAssertionEvidence(
+    "A real live-session activity transition still publishes exactly once",
+    `The idle-to-busy seed changed snapshot identity=${changedSnapshot}, produced status=${changedStatus}, and subscriber notifications=${notifications}.`,
+    changedSnapshot && changedStatus === "thinking" && notifications === 1,
+  );
+  expect(useSessionActivityStore.getState()).not.toBe(initialSnapshot);
+  expect(changedStatus).toBe("thinking");
+  expect(notifications).toBe(1);
+});