Javascript 错误：意外值'；FormGroup'；由模块'；动态测试模块'；

我们的项目结构如下：

我们的项目成功编译、构建并可以在浏览器中看到。这里没问题

但是当我们尝试使用

karma和jasmine运行测试用例时，我们得到了这个错误

XXXXComponent
   :heavy_multiplication_x: Should Match Current Tab as 1
     Chrome 55.0.2883 (Mac OS X 10.10.5)
   Error: Unexpected value 'FormGroup' declared by the module 'DynamicTestModule'
       at SyntaxError.ZoneAwareError (webpack:///~/zone.js/dist/zone.js:811:0 <- config/spec-bundle.js:74048:33)
       at SyntaxError.BaseError [as constructor] (webpack:///~/@angular/compiler/src/facade/errors.js:26:0 <- config/spec-bundle.js:78913:16)
       at new SyntaxError (webpack:///~/@angular/compiler/src/util.js:151:0 <- config/spec-bundle.js:6408:16)
       at webpack:///~/@angular/compiler/src/metadata_resolver.js:475:0 <- config/spec-bundle.js:19829:40
       at Array.forEach (native)
       at CompileMetadataResolver.getNgModuleMetadata (webpack:///~/@angular/compiler/src/metadata_resolver.js:457:0 <- config/spec-bundle.js:19811:54)
       at JitCompiler._loadModules (webpack:///~/@angular/compiler/src/jit/compiler.js:165:25 <- config/spec-bundle.js:55462:64)
       at JitCompiler._compileModuleAndAllComponents (webpack:///~/@angular/compiler/src/jit/compiler.js:144:25 <- config/spec-bundle.js:55441:52)
       at JitCompiler.compileModuleAndAllComponentsSync (webpack:///~/@angular/compiler/src/jit/compiler.js:98:0 <- config/spec-bundle.js:55395:21)
       at TestingCompilerImpl.compileModuleAndAllComponentsSync (webpack:///~/@angular/compiler/bundles/compiler-testing.umd.js:482:0 <- config/spec-bundle.js:78583:35)
       at TestBed._initIfNeeded (webpack:///~/@angular/core/bundles/core-testing.umd.js:761:0 <- config/spec-bundle.js:26731:40)
       at TestBed.createComponent (webpack:///~/@angular/core/bundles/core-testing.umd.js:844:0 <- config/spec-bundle.js:26814:18)
       at Function.TestBed.createComponent (webpack:///~/@angular/core/bundles/core-testing.umd.js:673:0 <- config/spec-bundle.js:26643:33)
       at Object.<anonymous> (webpack:///src/app/zzzz/yyyy/xxxx.component.spec.ts:20:0 <- config/spec-bundle.js:93231:37)
       at ZoneDelegate.invoke (webpack:///~/zone.js/dist/zone.js:242:0 <- config/spec-bundle.js:73479:26)
       at ProxyZoneSpec.onInvoke (webpack:///~/zone.js/dist/proxy.js:79:0 <- config/spec-bundle.js:73133:39)
       at ZoneDelegate.invoke (webpack:///~/zone.js/dist/zone.js:241:0 <- config/spec-bundle.js:73478:32)
       at Zone.run (webpack:///~/zone.js/dist/zone.js:113:0 <- config/spec-bundle.js:73350:43)
       at Object.<anonymous> (webpack:///~/zone.js/dist/jasmine-patch.js:102:0 <- config/spec-bundle.js:72848:34)
       at ZoneQueueRunner.jasmine.QueueRunner.ZoneQueueRunner.execute (webpack:///~/zone.js/dist/jasmine-patch.js:132:0 <- config/spec-bundle.js:72878:42)
       at ZoneQueueRunner.jasmine.QueueRunner.ZoneQueueRunner.execute (webpack:///~/zone.js/dist/jasmine-patch.js:132:0 <- config/spec-bundle.js:72878:42)
       at webpack:///~/zone.js/dist/jasmine-patch.js:129:91 <- config/spec-bundle.js:72875:130
       at ZoneDelegate.invokeTask (webpack:///~/zone.js/dist/zone.js:275:0 <- config/spec-bundle.js:73512:35)
       at Zone.runTask (webpack:///~/zone.js/dist/zone.js:151:0 <- config/spec-bundle.js:73388:47)
       at drainMicroTaskQueue (webpack:///~/zone.js/dist/zone.js:433:0 <- config/spec-bundle.js:73670:35)

我们的试验台就是这样设置的

TestBed.configureTestingModule({
   imports: [ReactiveFormsModule, FormsModule],
   declarations: [ FormGroup, XXXXComponent ], // declare the test   component
});

  fixture = TestBed.createComponent(XXXXComponent);
  comp = fixture.componentInstance; 
});

而且

testing.TestBed.initTestEnvironment(
  browser.BrowserDynamicTestingModule,
  browser.platformBrowserDynamicTesting()
);

我们已经安装了所有最新版本的软件包

"@angular/common": "~2.4.3",
"@angular/compiler": "~2.4.3",
"@angular/core": "~2.4.3",
"@angular/forms": "~2.4.3",
"@angular/http": "~2.4.3",
"@angular/material": "2.0.0-beta.1",
"@angular/platform-browser": "~2.4.3",
"@angular/platform-browser-dynamic": "~2.4.3",
"@angular/platform-server": "~2.4.3",
"@angular/router": "~3.4.3",
"karma": "^1.2.0",
"karma-chrome-launcher": "^2.0.0",
"karma-coverage": "^1.1.1",
"karma-jasmine": "^1.0.2",
"karma-remap-coverage": "^0.1.4",
"karma-sourcemap-loader": "^0.3.7",
"karma-webpack": "2.0.1",
"webpack": "2.2.0",
"webpack-dev-middleware": "^1.9.0",
"webpack-dev-server": "2.2.0",
"webpack-dll-bundles-plugin": "^1.0.0-beta.5",
"webpack-md5-hash": "~0.0.5",
"webpack-merge": "~2.4.0"

感谢您对解决此问题的任何帮助
 错误在测试台配置中

TestBed.configureTestingModule({
  imports: [ReactiveFormsModule, FormsModule],
  declarations: [ FormGroup, XXXXComponent ], // declare the test component
});

FormGroup
不是代码的一部分，它属于
ReactiveFormsModule
，因此声明它是无效的。声明意味着NgModule对所声明的内容拥有所有权。您也不应该提供、导入或直接导出它。您可以通过导入
ReactiveFormsModule
间接导入，也可以通过导出
ReactiveFormsModule
间接导出。你不能申报。你不能提供它

因此，将您的配置调用更改为

TestBed.configureTestingModule({
  imports: [ReactiveFormsModule, FormsModule],
  declarations: [XXXXComponent], // declare the test component
});

从声明中删除
FormGroup
，并添加到提供程序（如果已注入）。我也没有看到你导入
FormGroup
。。。因此，在测试时不能导入不必要的内容。。。明白了。@BenRacicot我很高兴这个答案对你有帮助。这适用于您是否正在测试。实际上，您可以在
imports
和/或
exports
中列出任意数量的
NgModule
，无论是否使用它们。您可能不做的是（1）声明组件、指令、管道和（2）提供属于其他
NgModule
s的服务。如果这听起来很复杂，那就是
NgModule
是一个极其复杂和不必要的抽象，没有任何价值（实际上，它有负价值）。这个答案救了我一天！我只想说，错误消息“模块'DynamicTestModule'声明的意外值'FormGroup'根本没有帮助！如果他们可以说“FormGroup不可声明，必须在模块中导入”，或者告诉DynamicTestModule和NgModule之间的关系。这个信息会更有帮助。但如果我只是在这里测试一个组件，为什么要涉及我的NgModule？测试系统的设计具有底层依赖关系？
TestBed.configureTestingModule({
  imports: [ReactiveFormsModule, FormsModule],
  declarations: [XXXXComponent], // declare the test component
});