Function event

packages/react-aria/test/searchfield/useSearchField.test.js:62–71

      let onSubmit = jest.fn();
      let onKeyDown = jest.fn();
      let event = key => ({
        key,
        nativeEvent: {
          isComposing: false
        },
        preventDefault,
        stopPropagation,
        target: {},
        currentTarget: {contains: () => true}
      });

      afterEach(() => {
        preventDefault.mockClear();