DEV: Rewrite broken tests

Mocking time in Ruby land doesn't translate to the browser

test/javascripts/acceptance/rewind-tab-test.js

@@ -0,0 +1,44 @@
+import { visit } from "@ember/test-helpers";
+import { test } from "qunit";
+import { acceptance, fakeTime } from "discourse/tests/helpers/qunit-helpers";
+
+acceptance("DiscourseRewind | rewind tab", function (needs) {
+  needs.user();
+  needs.settings({ discourse_rewind_enabled: true });
+
+  test("shows the tab in january", async function (assert) {
+    const clock = fakeTime("2022-01-10 12:00:00", null, false);
+
+    await visit("/my/activity");
+
+    assert
+      .dom(".user-nav__activity-rewind")
+      .exists("rewind tab is visible in January");
+
+    clock.restore();
+  });
+
+  test("shows the tab in december", async function (assert) {
+    const clock = fakeTime("2022-12-05 12:00:00", null, false);
+
+    await visit("/my/activity");
+
+    assert
+      .dom(".user-nav__activity-rewind")
+      .exists("rewind tab is visible in December");
+
+    clock.restore();
+  });
+
+  test("doesn't show the tab in november", async function (assert) {
+    const clock = fakeTime("2022-11-24 12:00:00", null, false);
+
+    await visit("/my/activity");
+
+    assert
+      .dom(".user-nav__activity-rewind")
+      .doesNotExist("rewind tab is not visible in November");
+
+    clock.restore();
+  });
+});