test: add test case

Author: zombieJ

tests/ref.spec.tsx

@@ -0,0 +1,28 @@
+/* eslint-disable react/no-render-return-value, max-classes-per-file, func-names, no-console */
+import { render } from '@testing-library/react';
+import { Provider } from 'rc-motion';
+import React from 'react';
+import Dialog from '../src';
+
+describe('Dialog.ref', () => {
+  beforeEach(() => {
+    jest.useFakeTimers();
+  });
+
+  afterEach(() => {
+    jest.clearAllTimers();
+    jest.useRealTimers();
+  });
+
+  it('support panelRef', () => {
+    const panelRef = React.createRef<HTMLDivElement>();
+
+    render(
+      <Provider motion={false}>
+        <Dialog panelRef={panelRef} visible />
+      </Provider>,
+    );
+
+    expect(panelRef.current).toHaveClass('rc-dialog');
+  });
+});