translate: 3450

public/docs/ts/latest/guide/testing.jade

@@ -3269,7 +3269,7 @@ code-example(format="." language="javascript").
   Each overide method takes a `MetadataOverride<T>` where `T` is the kind of metadata
   appropriate to the method, the parameter of an `@NgModule`, `@Component`, `@Directive`, or `@Pipe`.
 
-
+  每一个重载方法接受一个`MetadataOverride<T>`，这里`T`是适合这个方法的元数据类型，也就是`@NgModule`、`@Component`、`@Directive`或者`@Pipe`的参数。
 
 code-example(format="." language="javascript").
   type MetadataOverride<T> = {
@@ -3283,15 +3283,31 @@ code-example(format="." language="javascript").
 :marked
   The `TestBed` API consists of static class methods that either update or reference a _global_ instance of the`TestBed`.
 
+  `TestBed`的API包含了一系列静态类方法，它们更新或者引用**全局**的`TestBed`实例。
+  
   Internally, all static methods cover methods of the current runtime `TestBed` instance that is also returned by the `getTestBed()` function.
 
+  在内部，所有静态方法在`getTestBed()`函数返回的当前运行时间的`TestBed`实例上都有对应的方法。
+
   Call `TestBed` methods _within_ a `BeforeEach()` to ensure a fresh start before each individual test.
 
+  在`BeforeEach()`内调用`TestBed`方法，这样确保在运行每个单独测试时，都有崭新的开始。
+
   Here are the most important static methods, in order of likely utility.
+
+  这里列出了最重要的静态方法，以使用频率排序：
 table
   tr
-    th Methods
+    th 
-    th Description
+      :marked
+        Methods
+
+        方法
+    th 
+      :marked
+        Description
+
+        描述
   tr
     td(style="vertical-align: top") <code>configureTestingModule</code>
     td
@@ -3301,8 +3317,13 @@ table
         The default testing module is configured with basic declaratives and some Angular service substitutes (e.g. `DebugDomRender`) 
         that every tester needs.
 
+        测试垫片（`karma-test-shim`, `browser-test-shim`）创建了[初始测试环境](##testbed-initTestEnvironment)和默认测试模块。
+        默认测试模块是使用基本声明和一些Angular服务替代品（比如`DebugDomRender`），它们是所有测试都需要的。
+        
         Call `configureTestingModule` to refine the testing module configuration for a particular set of tests
         by adding and removing imports, declarations (of components, directives, and pipes), and providers.
+
+        调用`configureTestingModule`来为一套特定的测试定义测试模块配置，添加和删除导入、（组件、指令和管道的）声明和服务提供商。
   tr
     td(style="vertical-align: top") <code>compileComponents</code>
     td
@@ -3312,14 +3333,23 @@ table
         or `styleUrls` because fetching component template and style files is necessarily asynchronous.
         See [above](#compile-components).
 
+        在你完成配置以后异步编译测试模块。
+        如果**任何**测试组件有`templateUrl`或`styleUrls`，那么你**必须**调用这个方法。因为获取组件模块和样式文件必须是异步的。
+        参见[上面的描述](#compile-components)。
+
         Once called, the `TestBed` configuration is frozen for the duration of the current spec.
 
+        一旦调用，`TestBed`的配置就会在当前测试期间被冻结。
+
   tr
     td(style="vertical-align: top") <code>createComponent<T></code>
     td
       :marked
         Create an instance of a component of type `T` based on the current `TestBed` configuration.
         Once called, the `TestBed` configuration is frozen for the duration of the current spec.
+
+        基于当前`TestBed`的配置创建一个类型为T的组件实例。
+        一旦调用，`TestBed`的配置就会在当前测试期间被冻结。
   tr
     td(style="vertical-align: top") <code>overrideModule</code>
     td
@@ -3327,24 +3357,33 @@ table
         Replace metadata for the given `NgModule`. Recall that modules can import other modules.
         The `overrideModule` method can reach deeply into the current testing module to
         modify one of these inner modules.
+
+        替换指定的`NgModule`的元数据。回想一下，模块可以导入其他模块。
+        `overrideModule`方法可以深入到当前测试模块深处，修改其中一个内部模块。
   tr
     td(style="vertical-align: top") <code>overrideComponent</code>
     td
       :marked
         Replace metadata for the given component class which could be nested deeply 
         within an inner module.
+
+        替换指定组件类的元数据，该组件类可能嵌套在一个很深的内部模块中。
   tr
     td(style="vertical-align: top") <code>overrideDirective</code>
     td
       :marked
         Replace metadata for the given directive class which could be nested deeply 
         within an inner module.
+
+        替换指定的指令类的元数据，该指令可能嵌套在一个很深的内部模块中。
   tr
     td(style="vertical-align: top") <code>overridePipe</code>
     td
       :marked
         Replace metadata for the given pipe class which could be nested deeply 
         within an inner module.
+        
+        替换指定的管道类的元数据，该管道可能嵌套在一个很深的内部模块中。      
   tr
     td(style="vertical-align: top").
       <a id="testbed-get"></a>
@@ -3353,17 +3392,27 @@ table
       :marked
         Retrieve a service from the current `TestBed` injector.
 
+        从当前`TestBed`注入器获取一个服务。
+
         The `inject` function is often adequate for this purpose. 
         But `inject` throws an error if it can't provide the service. 
         What if the service is optional?
 
+        `inject`函数通常很适合这个任务。
+        但是如果`inject`不能提供服务，它会抛出错误。
+        如果服务是可选的呢？
+
         The `TestBed.get` method takes an optional second parameter, 
         the object to return if Angular can't find the provider
         (`null` in this example):
+
+        `TestBed.get`方法接受一个可选的第二参数，它是在Angular找不到所需提供商时返回的对象。（在本例中为`null`）：
       +makeExample('testing/ts/app/bag/bag.spec.ts', 'testbed-get')(format=".")
       :marked
         Once called, the `TestBed` configuration is frozen for the duration of the current spec.
 
+        一旦调用，`TestBed`的配置就会在当前测试期间被冻结。
+
   tr
     td(style="vertical-align: top").
       <a id="testbed-initTestEnvironment"></a>
@@ -3372,21 +3421,32 @@ table
       :marked
         Initialize the testing environment for the entire test run.
 
+        为整套测试的运行初始化测试环境。
+
         The testing shims (`karma-test-shim`, `browser-test-shim`) call it for you
         so there is rarely a reason for you to call it yourself.
 
+        测试垫片(`karma-test-shim`, `browser-test-shim`)会为你调用它，所以你很少需要自己调用它。
+
         This method may be called _exactly once_. Call `resetTestEnvironment` first
         if you absolutely need to change this default in the middle of your test run.
 
+        这个方法只能被调用**一次**。如果确实需要在测试运行期间变换这个默认设置，那么先调用`resetTestEnvironment`。
+
         Specify the Angular compiler factory, a `PlatformRef`, and a default Angular testing module.
         Alternatives for non-browser platforms are available in the general form
         `@angular/platform-<platform_name>/testing/<platform_name>`.
+
+        指定Angular编译器工厂，`PlatformRef`，和默认Angular测试模块。
+        非浏览器平台的替代以`@angular/platform-<platform_name>/testing/<platform_name>`的形式提供。
   tr
     td(style="vertical-align: top") <code>resetTestEnvironment</code>
     td
       :marked
         Reset the initial test environment including the default testing module.
 
+        重设初始测试环境，包括默认测试模块在内。
+
 :marked
   A few of the `TestBed` instance methods are not covered by static `TestBed` _class_ methods.
   These are rarely needed.