test: 💍 add missing controller unit tests in admin-ui (#2553)

* test: 💍 add missing controller unit tests in admin-ui

✅ Closes: https://hashicorp.atlassian.net/browse/ICU-14740

ui/admin/tests/unit/controllers/application-test.js

@@ -5,12 +5,57 @@
 
 import { module, test } from 'qunit';
 import { setupTest } from 'ember-qunit';
+import { authenticateSession } from 'ember-simple-auth/test-support';
 
 module('Unit | Controller | application', function (hooks) {
   setupTest(hooks);
 
+  let controller;
+  let featureEdition;
+  let featuresService;
+  let session;
+
+  hooks.beforeEach(async function () {
+    authenticateSession({});
+    controller = this.owner.lookup('controller:application');
+    featureEdition = this.owner.lookup('service:featureEdition');
+    featuresService = this.owner.lookup('service:features');
+    session = this.owner.lookup('service:session');
+  });
+
   test('it exists', function (assert) {
-    let controller = this.owner.lookup('controller:application');
     assert.ok(controller);
   });
+
+  test('invalidateSession action de-authenticates a user', async function (assert) {
+    assert.true(session.isAuthenticated);
+
+    await controller.invalidateSession();
+
+    assert.false(session.isAuthenticated);
+  });
+
+  test('toggleTheme action sets theme to specified value', function (assert) {
+    assert.notOk(session.data.theme);
+
+    controller.toggleTheme('light');
+
+    assert.strictEqual(session.data.theme, 'light');
+  });
+
+  test('toggleEdition action sets edition to specified value', function (assert) {
+    assert.notOk(featureEdition.edition);
+
+    controller.toggleEdition('oss');
+
+    assert.strictEqual(featureEdition.edition, 'oss');
+  });
+
+  test('toggleFeature action toggles specified feature', function (assert) {
+    assert.false(featuresService.isEnabled('ssh-target'));
+
+    controller.toggleFeature('ssh-target');
+
+    assert.true(featuresService.isEnabled('ssh-target'));
+  });
 });