angular - NullInjectorError : No provider for InjectionToken MatDialogData

Question

在我的 Angular 应用程序上运行 jasmine 测试时出现此错误。

Error: StaticInjectorError(DynamicTestModule)[MyEditDialogComponent -> InjectionToken MatDialogData]: 
  StaticInjectorError(Platform: core)[MyEditDialogComponent -> InjectionToken MatDialogData]: 
    NullInjectorError: No provider for InjectionToken MatDialogData!
error properties: Object({ ngTempTokenPath: null, ngTokenPath: [ 'MyEditDialogComponent', InjectionToken MatDialogData ], ngDebugContext: DebugContext_({ view: Object({ def: Object({ factory: Function, nodeFlags: 33669121, rootNodeFlags: 33554433, nodeMatchedQueries: 0, flags: 0, nodes: [ Object({ nodeIndex: 0, parent: null, renderParent: null, bindingIndex: 0, outputIndex: 0, checkIndex: 0, flags: 33554433, childFlags: 114688, directChildFlags: 114688, childMatchedQueries: 0, matchedQueries: Object({  }), matchedQueryIds: 0, references: Object({  }), ngContentIndex: null, childCount: 1, bindings: [  ], bindingFlags: 0, outputs: [  ], element: Object({ ns: '', name: 'app-edit-ban-dialog', attrs: [  ], template: null, componentProvider: Object({ nodeIndex: 1, parent: <circular reference: Object>, renderParent: <circular reference: Object>, bindingIndex: 0, outputIndex: 0, checkIndex: 1, flags: 114688, childFlags: 0, directChildFlags: 0, childMatchedQueries: 0, matchedQueries: Object, matchedQueryIds: 0 ...
Error: StaticInjectorError(DynamicTestModule)[MyEditDialogComponent -> InjectionToken MatDialogData]: 
  StaticInjectorError(Platform: core)[MyEditDialogComponent -> InjectionToken MatDialogData]: 
    NullInjectorError: No provider for InjectionToken MatDialogData!

我在我的组件中导入:

import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material';

在组件构造函数中，我将数据注入(inject)对话框:

 @Inject(MAT_DIALOG_DATA) public data: {
        myData : MyData
    }

在我要导入的组件的 karma jasmin 规范中:

import {
    MatFormFieldModule,
    MatInputModule,
    MatDialogModule,
    MatDialogRef,
    MAT_DIALOG_DATA,
    MatButtonModule,
    MatRadioModule,
    MatSelectModule
} from '@angular/material';

在 beforeEach 中的组件、导入和提供程序的 karma/jasmine 规范中:

 beforeEach(async(() => {
    TestBed.configureTestingModule({
        declarations: [ MyFormComponent ],
        imports: [
            MatFormFieldModule,
            MatInputModule,
            MatDialogModule,                               
        ],
        providers: [
            { provide: MatDialogRef, useValue: {} },
            { provide: MAT_DIALOG_DATA, useValue: { myData: MyData } }
        ]
    }).compileComponents();
}));

我已经尝试了这些答案，但它们没有解决问题
This
This

Answer 1

就我而言，我导入了指令 MatDialogModule、MAT_DIALOG_DATA 和 MatDialogRef

import { MatDialogModule, MAT_DIALOG_DATA, MatDialogRef } from '@angular/material/dialog';

然后在 beforeEatch() 中:

imports: [ MatDialogModule],
providers: [
    { provide: MAT_DIALOG_DATA, useValue: {} },
    { provide: MatDialogRef, useValue: {} }
  ]