Reactjs 从第三方库钩子返回的间谍函数
我无法从React-navigationv5中的Reactjs 从第三方库钩子返回的间谍函数,reactjs,react-native,jestjs,react-navigation,react-navigation-v5,Reactjs,React Native,Jestjs,React Navigation,React Navigation V5,我无法从React-navigationv5中的useNavigationhook返回的navigate函数中找出要监视的热点 我有一个简单的链接组件: const Link = props => { const { to, children, ...restProps } = props; const navigation = useNavigation(); const handlePress = useCallback(() => navigation.navig
useNavigation
hook返回的navigate
函数中找出要监视的热点
我有一个简单的链接
组件:
const Link = props => {
const { to, children, ...restProps } = props;
const navigation = useNavigation();
const handlePress = useCallback(() => navigation.navigate(to), [navigation, to]);
return (
<TouchableOpacity testID="link" onPress={handlePress}>
<Text
{...restProps}
>
{children}
</Text>
</TouchableOpacity>
);
};
const Link=props=>{
const{to,children,…restProps}=props;
const navigation=useNavigation();
const handlePress=useCallback(()=>navigation.navigate(to),[navigation,to]);
返回(
{儿童}
);
};
和相应试验:
jest.mock('@react-navigation/native', () => ({
...jest.requireActual('@react-navigation/native'),
useNavigation: () => ({
navigate: jest.fn(() => 'mocked navigate'),
}),
}));
import { useNavigation } from '@react-navigation/native';
const spy = jest.spyOn(useNavigation, 'navigate');
describe('<Link />', () => {
it('navigates', () => {
const link = render(<Link to="TestScreen">Test link</Link>);
fireEvent.press(link.getByTestId('link'));
expect(spy).toBeCalledTimes(1);
})
});
jest.mock('@react-navigation/native',()=>({
…jest.requireActual(“@react-navigation/native”),
使用导航:()=>({
导航:jest.fn(()=>“模拟导航”),
}),
}));
从'@react-navigation/native'导入{useNavigation};
const spy=jest.spyOn(使用导航,“导航”);
描述(“”,()=>{
它('导航',()=>{
常量链接=渲染(测试链接);
firevent.press(link.getByTestId('link'));
期望(间谍)。等待时间(1);
})
});
当然这是行不通的,因为在constspy=jest.spyOn(使用导航,'navigate')代码>导航
不是使用导航
的功能。但我尝试了无数其他的可能性,我就是不知道怎么做
基本上,我想做的是验证当按下链接时,它是否调用了带有预期参数的预期函数,我希望该函数被模拟出来。我知道我迟到了,但我也遇到了同样的问题,我想知道什么时候调用了导航函数
为此,我以这种方式模拟了该函数,因此mockedNavigate
将是一个笑话函数,我可以稍后使用:
const mockedNavigate = jest.fn();
jest.mock('@react-navigation/native', () => {
return {
...jest.requireActual('@react-navigation/native'),
useNavigation: () => ({
navigate: mockedNavigate,
}),
};
});
这使我以后可以使用它,在这种情况下,您将不再需要进行间谍活动,这应该可以实现以下目的:
expect(mockedNavigate).toHaveBeenCalledTimes(1);