[英]How can I test a button which uses props.history for it's onClick with react testing library?
[英]How can I test a button onClick which uses props.history for it's function in rtl?
我正在使用反应测试库,我想测试一个按钮:
<button data-testid="btn" onClick={() => props.history.push(`/post/${value}`)} > Search </button>
<input data-testid="input" type="text" value={value} onChange={(e) => handle(e.target.value)} />
我像这样测试它的 onClick function :
test('Button should navigate the url when enabled', () => {
render(<Home />);
const input = screen.getByTestId('input');
const btn = screen.getByTestId('btn');
fireEvent.change(input, { target: { value: '12' } });
fireEvent.click(btn);
});
但它给了我一个错误:
TypeError: Cannot read property 'push' of undefined
19 | <button
20 | data-testid="btn"
> 21 | onClick={() => props.history.push(`/post/${value}`)}
| ^
22 | disabled={!value}
23 | type="submit"
24 | >
当我启动 npm 时,应用程序本身运行良好,但仅在测试时失败。 我该如何解决这种未定义的推送?
您必须将道具传递给渲染的组件,在这种情况下 - <Home />
:
import history from 'history' // Or a file you made that contains an instance of history
test('Button should navigate the url when enabled', () => {
render(<Home history={history} {...otherProps} />);
const input = screen.getByTestId('input');
const btn = screen.getByTestId('btn');
fireEvent.change(input, { target: { value: '12' } });
fireEvent.click(btn);
});
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