1 files changed, 20 insertions, 0 deletions
diff --git a/spec/frontend/repository/utils/dom_spec.js b/spec/frontend/repository/utils/dom_spec.js
new file mode 100644
index 00000000000..678d444904d
--- /dev/null
+++ b/spec/frontend/repository/utils/dom_spec.js
@@ -0,0 +1,20 @@
+import { setHTMLFixture } from '../../helpers/fixtures';
+import { updateElementsVisibility } from '~/repository/utils/dom';
+
+describe('updateElementsVisibility', () => {
+  it('adds hidden class', () => {
+    setHTMLFixture('<div class="js-test"></div>');
+
+    updateElementsVisibility('.js-test', false);
+
+    expect(document.querySelector('.js-test').classList).toContain('hidden');
+  });
+
+  it('removes hidden class', () => {
+    setHTMLFixture('<div class="hidden js-test"></div>');
+
+    updateElementsVisibility('.js-test', true);
+
+    expect(document.querySelector('.js-test').classList).not.toContain('hidden');
+  });
+});