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import React from 'react';
import { fireEvent, render, sleep } from '../utils';
const focusTest = (
Component: React.ComponentType<any>,
{ refFocus = false, blurDelay = 0 } = {},
) => {
describe('focus and blur', () => {
let focused = false;
let blurred = false;
const mockFocus = jest.spyOn(HTMLElement.prototype, 'focus');
const mockBlur = jest.spyOn(HTMLElement.prototype, 'blur');
beforeAll(() => {
if (refFocus) {
mockFocus.mockImplementation(() => {
focused = true;
});
mockBlur.mockImplementation(() => {
blurred = true;
});
}
});
let containerHtml: HTMLDivElement;
beforeEach(() => {
containerHtml = document.createElement('div');
document.body.appendChild(containerHtml);
focused = false;
blurred = false;
});
afterAll(() => {
mockFocus.mockRestore();
mockBlur.mockRestore();
});
afterEach(() => {
document.body.removeChild(containerHtml);
});
const getElement = (container: HTMLElement) =>
container.querySelector('input') ||
container.querySelector('button') ||
container.querySelector('textarea') ||
container.querySelector('div[tabIndex]');
if (refFocus) {
it('Ref: focus() and onFocus', () => {
const onFocus = jest.fn();
const ref = React.createRef<any>();
const { container } = render(
<div>
<Component onFocus={onFocus} ref={ref} />
</div>,
);
ref.current.focus();
expect(focused).toBeTruthy();
fireEvent.focus(getElement(container)!);
expect(onFocus).toHaveBeenCalled();
});
it('Ref: blur() and onBlur', async () => {
jest.useRealTimers();
const onBlur = jest.fn();
const ref = React.createRef<any>();
const { container } = render(
<div>
<Component onBlur={onBlur} ref={ref} />
</div>,
);
ref.current.blur();
expect(blurred).toBeTruthy();
fireEvent.blur(getElement(container)!);
await sleep(blurDelay);
expect(onBlur).toHaveBeenCalled();
});
it('Ref: autoFocus', () => {
const onFocus = jest.fn();
const { container } = render(<Component autoFocus onFocus={onFocus} />);
expect(focused).toBeTruthy();
fireEvent.focus(getElement(container)!);
expect(onFocus).toHaveBeenCalled();
});
} else {
it('focus() and onFocus', () => {
const handleFocus = jest.fn();
const { container } = render(<Component onFocus={handleFocus} />);
fireEvent.focus(getElement(container)!);
expect(handleFocus).toHaveBeenCalled();
});
it('blur() and onBlur', async () => {
jest.useRealTimers();
const handleBlur = jest.fn();
const { container } = render(<Component onBlur={handleBlur} />);
fireEvent.focus(getElement(container)!);
await sleep(0);
fireEvent.blur(getElement(container)!);
await sleep(0);
expect(handleBlur).toHaveBeenCalled();
});
it('autoFocus', () => {
const handleFocus = jest.fn();
render(<Component autoFocus onFocus={handleFocus} />);
expect(handleFocus).toHaveBeenCalled();
});
}
});
};
// eslint-disable-next-line jest/no-export
export default focusTest;
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