test: add qunit acceptance test for topic count tracking in custom nav links

Author: akanora

test/javascripts/acceptance/nav-bar-additions-test.js

@@ -0,0 +1,40 @@
+import { acceptance, exists } from "discourse/tests/helpers/qunit-helpers";
+import { visit } from "@ember/test-helpers";
+import { test } from "qunit";
+
+acceptance("Custom Top Navigation Links | Topic Counts", function (needs) {
+  needs.user();
+
+  let originalNavLinks;
+  let originalShowCounts;
+
+  needs.hooks.beforeEach(function () {
+    originalNavLinks = settings.nav_links;
+    originalShowCounts = settings.Show_counts;
+
+    settings.nav_links = [
+      { display_name: "New Topics", title: "new topics", url: "/new" },
+      { display_name: "Unread Topics", title: "unread topics", url: "/unread" },
+    ];
+    settings.Show_counts = true;
+  });
+
+  needs.hooks.afterEach(function () {
+    settings.nav_links = originalNavLinks;
+    settings.Show_counts = originalShowCounts;
+  });
+
+  test("shows new and unread counts in navigation items", async function (assert) {
+    const topicTrackingState = this.owner.lookup("service:topic-tracking-state");
+    topicTrackingState.countNew = () => 42;
+    topicTrackingState.countUnread = () => 17;
+
+    await visit("/latest");
+
+    assert.ok(exists(".nav-item_custom_new-topics"), "custom navigation item for new topics is rendered");
+    assert.dom(".nav-item_custom_new-topics a").hasText("New Topics (42)", "it shows the custom new topics count");
+
+    assert.ok(exists(".nav-item_custom_unread-topics"), "custom navigation item for unread topics is rendered");
+    assert.dom(".nav-item_custom_unread-topics a").hasText("Unread Topics (17)", "it shows the custom unread topics count");
+  });
+});