covering all javascript

src/index.test.js

@@ -0,0 +1,44 @@
+import EmbeddableWidget from './index';
+import { waitForSelection } from './test-helpers';
+
+describe('EmbeddableWidget', () => {
+  afterEach(() => {
+    document.readyState = 'complete';
+    if (EmbeddableWidget.el) {
+      EmbeddableWidget.unmount();
+    }
+  });
+
+  test('#mount document becomes ready', async () => {
+    document.readyState = 'loading';
+    EmbeddableWidget.mount();
+    window.dispatchEvent(new Event('load', {}));
+    await waitForSelection(document, 'div');
+  });
+
+  test('#mount document complete', async () => {
+    EmbeddableWidget.mount();
+    await waitForSelection(document, 'div');
+  });
+
+
+  test('#mount twice', async () => {
+    EmbeddableWidget.mount();
+    expect(() => EmbeddableWidget.mount()).toThrow('already mounted');
+  });
+
+  test('#unmount', async () => {
+    const el = document.createElement('div');
+    document.body.appendChild(el);
+    expect(document.querySelectorAll('div')).toHaveLength(1);
+
+    EmbeddableWidget.el = el;
+    EmbeddableWidget.unmount();
+
+    expect(document.querySelectorAll('div')).toHaveLength(0);
+  });
+
+  test('#unmount without mounting', async () => {
+    expect(() => EmbeddableWidget.unmount()).toThrow('not mounted');
+  });
+});