angular-cn/public/docs/js/latest/api/test/inject-function.jade

.l-main-section
  h2(class="function export") inject

  
  pre.prettyprint
    code.
      inject(tokens: List<any>, fn: Function) : FunctionWithParamTokens
  

  p.location-badge.
    exported from <a href='../test'>angular2/test</a>
    defined in <a href="https://github.com/angular/angular/tree/2.0.0-alpha.32/modules/angular2/src/test_lib/test_injector.ts#L148-L181">angular2/src/test_lib/test_injector.ts (line 148)</a>

  :markdown
    Allows injecting dependencies in `beforeEach()` and `it()`.
    
    Example:
    
    ```
    beforeEach(inject([Dependency, AClass], (dep, object) => {
      // some code that uses `dep` and `object`
      // ...
    }));
    
    it('...', inject([AClass, AsyncTestCompleter], (object, async) => {
      object.doSomething().then(() => {
        expect(...);
        async.done();
      });
    })
    ```
    
    Notes:
    - injecting an `AsyncTestCompleter` allow completing async tests - this is the equivalent of
      adding a `done` parameter in Jasmine,
    - inject is currently a function because of some Traceur limitation the syntax should eventually
      becomes `it('...', @Inject (object: AClass, async: AsyncTestCompleter) => { ... });`