@testing-library/react:testing-library 是个 UI 测试库,用于在测试中模仿浏览器渲染组件,@testing-library/react 是指适用于 react 的版本。 happy-dom:用于在测试中提供浏览器的document功能,如果没有这个包,测试中会抛出document is not defined,所以我们需要提供这个document。 msw:提供 mock 功能的库。如果你测...
As part of this, you want your testbase to be maintainable in the long run so refactors of your components (changes to implementation but not functionality) don't break your tests and slow you and your team down.The solutionThe React Testing Library is a very lightweight solution for ...
因为我们是在命令行中跑测试,而不是在浏览器中进行测试, 渲染使用@testing-library/react, 提供了渲染方法。查看内容,则是Jest内置了jsdom, jsdom提供了DOM的无头实现,也就是说在命令行中跑测试,在测试中仍然可以获取到document, document.body 等DOM 元素,也就可以使用documet.getElementId() 等DOM 方法来查出...
下一个错误变为:TypeError: (0 , _react.useState) is not a function在我使用 React 挂钩的另一个文件中。 我想解决问题而不是实施解决方法。 我使用microbundle使用 React 捆绑我的库。我使用parcel-bundler导入 React 组件并在开发环境(直接来自 src)或 prod(捆绑库)中呈现它 我使用的捆绑版本与 .mjs 捆绑...
My first thought was that somehow I just wasn’t usingjsdom. But this is the default env now, andconsole.log(document.createElement)works fine in the test file. However, either that’s undefined inreact-testing-library. Or theReact.default.createElementis somehow defined—not sure. ...
它可以在浏览器中工作,但现在的问题是我不知道如何为它编写测试。我尝试过react-testing-library/hooks,但是钩子从来没有被调用过,我想是因为ResizeObserver。基本上,在测试中,我创建了一个组件function Component { const [ref, 浏览39提问于2019-10-18得票数9 ...
问React + Jest测试错误-未定义ReferenceError: expectEN每当您希望测试某个值时，就可以使用expect函数，...
expect(getByText(/Getting started with React testing library/i)).toBeInTheDocument(); }); }); This refactor makes no material difference to how our test will run. I prefer thedescribeanditpattern as it allows me structure my test file into logical blocks of related tests. The test should...
First, we require React, its TestUtils, d3.js, the expect library, and the code we’re testing. Then we make a new test suite with describe, and create some random data. For our first test, let’s make sure ScatterPlot renders a title. Our test goes inside the describe block: //...
If you need to dynamically update the page title based on the content, you can use the browser document.title API. For more complex scenarios when you want to change the title from React components, you can use React Helmet, a third party library....