Convert old tests to use "react-testing-library"

app/soapbox/components/ui/button/__tests__/button.test.tsx

@@ -0,0 +1,62 @@
+import React from 'react';
+
+import { fireEvent, render, screen } from '../../../../jest/test-helpers';
+import Button from '../button';
+
+describe('<Button />', () => {
+  it('renders the given text', () => {
+    const text = 'foo';
+    render(<Button text={text} />);
+
+    expect(screen.getByRole('button')).toHaveTextContent(text);
+  });
+
+  it('handles click events using the given handler', () => {
+    const handler = jest.fn();
+    render(<Button onClick={handler} />);
+
+    fireEvent.click(screen.getByRole('button'));
+    expect(handler.mock.calls.length).toEqual(1);
+  });
+
+  it('does not handle click events if props.disabled given', () => {
+    const handler = jest.fn();
+    render(<Button onClick={handler} disabled />);
+
+    fireEvent.click(screen.getByRole('button'));
+    expect(handler.mock.calls.length).toEqual(0);
+  });
+
+  it('renders a disabled attribute if props.disabled given', () => {
+    render(<Button disabled />);
+
+    expect(screen.getByRole('button')).toBeDisabled();
+  });
+
+  it('renders the children', () => {
+    render(<Button><p>children</p></Button>);
+
+    expect(screen.getByRole('button')).toHaveTextContent('children');
+  });
+
+  it('renders the props.text instead of children', () => {
+    const text = 'foo';
+    const children = <p>children</p>;
+    render(<Button text={text}>{children}</Button>);
+
+    expect(screen.getByRole('button')).toHaveTextContent('foo');
+    expect(screen.getByRole('button')).not.toHaveTextContent('children');
+  });
+
+  it('render full-width button if block prop given', () => {
+    render(<Button block />);
+
+    expect(screen.getByRole('button')).toHaveClass('w-full');
+  });
+
+  it('handles Theme properly', () => {
+    render(<Button theme='secondary' />);
+
+    expect(screen.getByRole('button')).toHaveClass('bg-primary-100');
+  });
+});