// myClass.jsclassMyClass{constructor(name){this.name=name;}methodOne(){return1;}methodTwo(){return2;}}exportdefaultMyClass; 如果在 testSubject.js 中使用,则测试文件中的 mock 代码为: importtestSubjectfrom'./testSubject';jest.mock('./myClass',()=>()=>({name:'Jody',methodOne:()=>10...
One common scenario where we may need to mock a static function is when following the Factory Design Pattern to create a new object as follows: Copy export class PersonFactory { private static _instance: IPerson; static getInstance(name: string, age: number): IPerson { if (!PersonFactory._...
Error: Argument of type 'typeof PermissionGuard' is not assignable to parameter of type 'PartialFuncReturn<{ prototype: { readonly reflector: ...; readonly rolePermissionService: ...; canActivate: ...; }; }>'. Types of property 'prototyp...
In the case where you define an ES6 class using the same filename as the mocked class in the __mocks__ folder, it serves as the mock. This class is used in place of the real class. This will allow you to inject a test implementation for the class, but it does not provide a way...
This means that if you happen to have imported a module that also uses/imports that module (that you are about to mock) in the setup file, you will not be able to mock that module! In my case, I was refactoring my code so that everything that relates to testing is in one export ...
In the case where you have a mock function, you can make use of .toHaveReturned to test that the mock function successfully returned (i.e., did not throw an error) at least one time. For example, let's say you have a mock drink that returns true. You can write the code below: ...
*/module.exports= {// All imported modules in your tests should be mocked automatically// automock: false,// Stop running tests after `n` failures// bail: 0,// The directory where Jest should store its cached dependency information// cacheDirectory: "/private/var/folders/6j/_9wqvbk15bl...
您可以使用jest.doMock()将jest类的所有方法存根到单个单元测试用例中。
You almost had it.The firstfixture.detectChanges()is whenngOnInitis called but the issue is you...
只需删除setTimeout（）并等待对应用程序的调用。您应该在beforeAll（）方法中初始化应用程序，我假设您...