Call async function in Jest test

AsyncJest.test.tsx

    it('Error label should contain `No userPool`', async () => {
      const wrapper = TestRenderer.create(<CognitoLogin />);
      const child = wrapper.root.findByProps({ iconName: 'sign-in' });
      await child.props.onPress();

      const errorLabel = wrapper.root.findByProps({ isCaption: true });
      expect(errorLabel.props.children).toBe('No userPool');
    });