Jest uses matchers to test the unit test cases in different ways like matching the equal values, truthiness, numbers, strings, and so on. Mal ganz ehrlich: Testen im Frontend hat noch nie viel Spaß gemacht. That is, I'm opening a file from a SharePoint SiteAssets library. These are just a few I picked from a long list of Jest matchers in the docs, you can check out the rest. jest compare two json objects 14 Jan. jest compare two json objects. expect objectContaining jest test Code Example Jest snippets extension for Visual Studio Code. still expect.objectContaining allows for a simple way of implementing the comparison as you'd expect (i.e. We will use the 'expect' method to test our functions. I also want to mention that I'm doing something very similar to what it appears @VadimGorbenko is doing. Methods. Returns the jest object for chaining. jest not implemented window.alert() : codehunter Jest Expect Last update on May 22 2020 13:11:11 (UTC/GMT +8 hours) Often times you need to check that values meet certain conditions when you are writing tests. objectContaining ( { a : 1 , b : 2 , c : 3 } ) ) ; But this is longer to type out, and just in general I expected toMatchObject to work the same way as "recursive objectContaining s", which afaiu is the intent. You might have heard about snapshot testing in Jest, where it helps you monitor changes on your UI elements. A quick overview to Jest, a test framework for Node.js. csdn已为您找到关于await await expect 对此表达式没有影响相关内容，包含await await expect 对此表达式没有影响相关文档代码介绍、相关教程视频课程，以及相关await await expect 对此表达式没有影响问答内容。为您解决当下相关问题，如果想了解更详细await await expect 对此表达式没有影响内容，请点击详情 . jest-react-native - Overview - Socket expect.any (<constructor>) lets you match any object of a specific type expect.anything () matches anything except null and undefined expect.stringMatching (regexp) matches any string that matches the regex you pass it expect.stringContaining (string) matches strings against a substring The Collection Class. However, when applied to arrays, expect.objectContaining behaves the same way as toEqual (deep level object comparison), while toMatchObject goes its own way: It checks that the array contains the exact number of elements and that each element contains a subset of properties of the received element at the same position.