Angular ユニットテスト エラー（ NullInjectorError: No provider for Router ）の対応。
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![StaticInjectorError(Platform: core)[RouterScroller -> ViewportScroller] · Issue #31425 · angular/angular · GitHub](https://user-images.githubusercontent.com/17472606/61265924-33674780-a7b0-11e9-8138-c77625543862.png "StaticInjectorError(Platform: core)[RouterScroller -> ViewportScroller] · Issue #31425 · angular/angular · GitHub")
StaticInjectorError(Platform: core)[RouterScroller -> ViewportScroller] · Issue #31425 · angular/angular · GitHub
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![angular - NullInjectorError: No provider for t! NullInjectorError: StaticInjectorError(ba)[Cw -> t]: - Stack Overflow](https://i.stack.imgur.com/NilZS.png "angular - NullInjectorError: No provider for t! NullInjectorError: StaticInjectorError(ba)[Cw -> t]: - Stack Overflow")
angular - NullInjectorError: No provider for t! NullInjectorError: StaticInjectorError(ba)[Cw -> t]: - 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 "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
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![No provider found for CdkOverlayContainer [angular client] - Issues developing apps - OpenVidu](https://canada1.discourse-cdn.com/free1/uploads/openvidu/optimized/2X/a/a352c4e36b41a186704d8cfeb2529ba4c67dfbfc_2_1024x613.png "No provider found for CdkOverlayContainer [angular client] - Issues developing apps - OpenVidu")
No provider found for CdkOverlayContainer [angular client] - Issues developing apps - OpenVidu
Upgrading to Angular 5 NullInjectorError: No provider for - Stack Overflow
