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unit testing - Karma + Jasmine + Angular 4 - NullInjectorError: No provider for HttpClient - Stack Overflow
![Unhandled Promise rejection: StaticInjectorError(AppModule)[OidcSecurityService -> Router] · Issue #164 · damienbod/angular-auth-oidc-client · GitHub Unhandled Promise rejection: StaticInjectorError(AppModule)[OidcSecurityService -> Router] · Issue #164 · damienbod/angular-auth-oidc-client · GitHub](https://user-images.githubusercontent.com/7438486/35435665-679f3746-02ad-11e8-807c-32944a6c6290.png)
Unhandled Promise rejection: StaticInjectorError(AppModule)[OidcSecurityService -> Router] · Issue #164 · damienbod/angular-auth-oidc-client · GitHub
Error: NullInjectorError: No provider for Http! ; Zone: <root> ; while upgrading from version 4.4 to 5. · Issue #20096 · angular/angular · GitHub
![angular11 - Angular 11 jasmine test NullInjectorError: No provider for HttpClient! even after adding HttpClientTestingModule - Stack Overflow angular11 - Angular 11 jasmine test NullInjectorError: No provider for HttpClient! even after adding HttpClientTestingModule - Stack Overflow](https://i.stack.imgur.com/zvMic.png)
angular11 - Angular 11 jasmine test NullInjectorError: No provider for HttpClient! even after adding HttpClientTestingModule - Stack Overflow
![angular - NullInjectorError: R3InjectorError(AppModule)[RouterModule -> Router -> Function -> Function ->Function]: NullInjectorError: No provider for Function - Stack Overflow angular - NullInjectorError: R3InjectorError(AppModule)[RouterModule -> Router -> Function -> Function ->Function]: NullInjectorError: No provider for Function - Stack Overflow](https://i.stack.imgur.com/H0hEL.png)