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__tests__/App.test.tsx

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+/**
+ * @format
+ */
+
+import React from 'react';
+import ReactTestRenderer from 'react-test-renderer';
+import App from '../App';
+
+test('renders correctly', async () => {
+  await ReactTestRenderer.act(() => {
+    ReactTestRenderer.create(<App />);
+  });
+});