警告付きでアプリをコンパイルできましたが、ブラウザコンソールでエラー . No provider for MessageService! - Prime Community Forum Angular-Karma Solution of NullInjectorError in UnitTest [ionic4] Bellow I mentions test code. However, when I run ng test for my unit tests, and when those tests use the service, I am getting the error: Error: StaticInjectorError(DynamicTestModule)[HttpClient]: StaticInjectorError(Platform: core)[HttpClient]: NullInjectorError: No provider for HttpClient! To fix NullInjectorError: No provider for HttpClient! Reddit - Dive into anything nullinjectorerror: no provider for httpclient jasmine test test case Uncaught Error: No provider for HttpClient! Error: NullInjectorError: No provider for Http! - GitHub 0. karma jasmine NullInjectorError: No provider for HttpClient! NullInjectorError: No provider for HttpClient - test component depending on service, which in turn depends on service using HttpClient Trying to unit-test a component with service A in the providers array. Step 2 — Adding Tests. . karma jasmine - Angular 6 - NullInjectorError: No provider for ... Reddit - Dive into anything No provider for ${this}!. Simply add the import at the top of the file : import { HttpClientModule } from '@angular/common/http'; And then in the imports section, add the HttpClientModule : nullinjectorerror: no provider for angular test Mark Hendriks. Service A imports Service B which in turn imports Service C. Service C has a dependency to HttpClient, which the unit-test complains about. If you don't import HttpClientModule(or HttpClientTestingModule) there, HttpClientwon't work because Angular doesn't know about it. Inject provider into another provider; Latest Posts. 17. NullInjectorError: No provider for HttpTestingController! during ... More "Kinda" Related Javascript Answers View All Javascript Answers » electronjs require is not defined; collection.ensureIndex is deprecated; Module not found: Can't resolve '@emotion/react' in 'E:\Web Development\Frontend\React JS Projects\linkedin-clone\node_modules\@mui\styled-engine' In this tutorial, you learn how to unit test angular services with example test cases. test angular main.ts:12 NullInjectorError: R3InjectorError(AppModule)[EmployeeService -> HttpClient -> HttpClient -> HttpClient]: No provider for HttpClient! NullInjectorError: R3InjectorError(DynamicTestModule)[ServiceA -> ServiceB -> ServiceC -> HttpClient -> HttpClient]: NullInjectorError: No provider for HttpClient! 5. unit test fail with NullInjectorError in Angular