testing/Unittests.md

+Angular creates for every component, service or class a unittest file with the file ending `spec.ts`. We use native Angular unittests (Angular uses Karma and Jasmine) with two additional libraries.
+
+## Prerequisites
+Google Chrome or Chromium should be installed.
+
+## Run
+To run tests use `ng test`   
+To run tests with code coverage use `ng test --codeCoverage` (Result will be in `/coverage`)
+
+## Documentation
+- Angular Testing: https://angular.io/guide/testing
+- Spectator Library (simplifies testing): https://github.com/ngneat/spectator/blob/master/README.md
+- ng-mocks (mock Components and Pipes): https://github.com/ike18t/ng-mocks/blob/master/README.md
+  - Specific guide for Spectator: https://github.com/ngneat/spectator/blob/master/README.md#mocking-components
\ No newline at end of file