Rename helper library to get-error-message

examples/element-factory/src/button.test.js

@@ -0,0 +1,15 @@
+import { createButton } from './button.js';
+
+describe('createButton', () => {
+  it('should create a button element', () => {
+    const button = createButton();
+    expect(button.tagName).toBe('BUTTON');
+  });
+
+  it('should have the text "Click Me"', () => {
+    const button = createButton();
+    expect(button.textContent).toBe('Click Me');
+  });
+
+  it.todo('should change the text to "Clicked!" when clicked', async () => {});
+});