1 files changed, 31 insertions, 0 deletions
diff --git a/spec/frontend/blob_edit/blob_bundle_spec.js b/spec/frontend/blob_edit/blob_bundle_spec.js
new file mode 100644
index 00000000000..be438781850
--- /dev/null
+++ b/spec/frontend/blob_edit/blob_bundle_spec.js
@@ -0,0 +1,31 @@
+import $ from 'jquery';
+import blobBundle from '~/blob_edit/blob_bundle';
+
+jest.mock('~/blob_edit/edit_blob');
+
+describe('BlobBundle', () => {
+  beforeEach(() => {
+    setFixtures(`
+      <div class="js-edit-blob-form" data-blob-filename="blah">
+        <button class="js-commit-button"></button>
+        <a class="btn btn-cancel" href="#"></a>
+      </div>`);
+    blobBundle();
+  });
+
+  it('sets the window beforeunload listener to a function returning a string', () => {
+    expect(window.onbeforeunload()).toBe('');
+  });
+
+  it('removes beforeunload listener if commit button is clicked', () => {
+    $('.js-commit-button').click();
+
+    expect(window.onbeforeunload).toBeNull();
+  });
+
+  it('removes beforeunload listener when cancel link is clicked', () => {
+    $('.btn.btn-cancel').click();
+
+    expect(window.onbeforeunload).toBeNull();
+  });
+});