fix: finish 2.9.0 plugin moves and get every check green

plugins/file-manager/tests/backend/transfer-profile-store.test.ts

@@ -0,0 +1,57 @@
+import { afterEach, describe, expect, it } from "vitest";
+import {
+  clearTransferProfiles,
+  flushTransferProfiles,
+  getTransferProfile,
+  initializeTransferProfiles,
+  recordTransferProfile,
+  setTransferProfileStore,
+  type PersistedProfiles,
+} from "../../src/backend/transfer-tuning.js";
+
+afterEach(() => {
+  setTransferProfileStore(null);
+  clearTransferProfiles();
+});
+
+function memoryStore() {
+  let saved: PersistedProfiles | undefined;
+  return {
+    store: {
+      read: async () => saved,
+      write: async (value: PersistedProfiles) => {
+        saved = JSON.parse(JSON.stringify(value));
+      },
+    },
+    saved: () => saved,
+  };
+}
+
+describe("transfer profile store", () => {
+  it("saves learned profiles and reads them back after a restart", async () => {
+    const memory = memoryStore();
+    setTransferProfileStore(memory.store);
+    await initializeTransferProfiles();
+
+    recordTransferProfile("host-a:host-b", {
+      bytes: 50 * 1024 * 1024,
+      durationMs: 5000,
+      lanes: 4,
+      pipelineConcurrency: 8,
+      failed: false,
+      now: Date.now(),
+    });
+    await flushTransferProfiles();
+    expect(Object.keys(memory.saved()?.profiles ?? {})).toHaveLength(1);
+
+    // A fresh activation starts from what the store holds.
+    setTransferProfileStore(memory.store);
+    await initializeTransferProfiles();
+    expect(getTransferProfile("host-a:host-b")).toBeDefined();
+  });
+
+  it("works without a store", async () => {
+    await initializeTransferProfiles();
+    expect(getTransferProfile("nothing")).toBeUndefined();
+  });
+});