review: tesing.
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@ -1107,13 +1107,13 @@ a(href="#top").to-top 回到顶部
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down through the component tree.
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Angular的注入系统是层次化的。
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可以有很多层注入器,从根`TestBed`创建的注入器下来贯穿整个组件数。
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可以有很多层注入器,从根`TestBed`创建的注入器下来贯穿整个组件树。
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The safest way to get the injected service, the way that **_always works_**,
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is to **get it from the injector of the _component-under-test_**.
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The component injector is a property of the fixture's `DebugElement`.
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最安全的获取注入的服务和**总是有效**的方法,是**从被测试的组件的注入器获取**。
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最安全并总是有效的获取注入服务的方法,是从被测试的组件的注入器获取。
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组件注入器是fixture的`DebugElement`的属性。
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+makeExample('testing/ts/app/welcome.component.spec.ts', 'injected-service', 'WelcomeComponent\'s injector')(format='.')
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