Created Loader.test.tsx file

Co-authored-by: minzo-kim <[email protected]>

Author: jasnoo

src/app/__tests__jn/Loader.test.tsx

@@ -0,0 +1,23 @@
+import React from 'react';
+import { render } from '@testing-library/react';
+import '@testing-library/jest-dom/extend-expect'; // needed this to extend the jest-dom assertions  (ex toHaveTextContent)
+import Loader from '../components/Loader';
+
+describe('unit testing for Loader.tsx', () => {
+  test('renders a loading icon', () => {
+    const { container } = render(<Loader loading={true} result={false} />);
+    expect(container.firstChild).toHaveClass('css-xp4o0b');
+  });
+
+  test('renders a fail icon', () => {
+    // render(<Loader loading={false} result={false} />);
+    const { container } = render(<Loader loading={false} result={false} />);
+    expect(container.getElementsByClassName('fail').length).toBe(1);
+  });
+
+  test('renders a check icon', () => {
+    // render(<Loader loading={false} result={true} />);
+    const { container } = render(<Loader loading={false} result={true} />);
+    expect(container.getElementsByClassName('check').length).toBe(1);
+  });
+});