title: How to create test spec for angular 2 service with @Inject contructor
body: <p>I am having a problem creating a unit test for my translate service. I have this as a constructor of my <strong>TranslateService</strong></p>
  
  <pre><code>constructor(@Inject(TRANSLATIONS) private _translations: any) {}
  </code></pre>
  
  <p>I created <strong>my translate.service.spec.ts</strong> with this</p>
  
  <pre><code>describe('On initialize', () =&gt; {
          it('No changes made to the service', async(inject([TranslateService], (service: TranslateService) =&gt; {
              let translate = TestBed.get(TranslateService);
          })));
      });
  </code></pre>
  
  <p>However, the console prompts me with an error saying, "<strong>No provider for TranslateService</strong>". How inject the @Inject in the spec file?</p>