关于打字稿：角垫分隔线不是已知元素

Angular mat-divider is not a known element

我正在尝试以角度测试弹出组件，但我不知道为什么在启动测试时出现错误消息：

'mat-divider' is not a known element:
1. If 'mat-divider' is an Angular component, then verify that it is part of this module.
2. If 'mat-divider' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component
to suppress this message.

我在@NgModule中导入了它，这是我的代码：

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@NgModule({
declarations: [
AppComponent,
AdminTopMenuComponent,
SvGameCardComponent,
SvCreationPopupComponent,
MockPopupComponent,
\tMyDialogComponent,
\tFvCreationPopupComponent,
GameModesComponent,
LinkTestComponent,
UserComponent,
],
imports: [
BrowserModule,
HttpClientModule,
AppRoutingModule,
FormsModule,
ReactiveFormsModule,
MatDialogModule,
\tBrowserAnimationsModule,
\tMatButtonModule,
\tMatCheckboxModule,
MatTableModule,
MatDividerModule,
MatInputModule,
MatSelectModule,
MatFormFieldModule,
MatCardModule,
AppRoutingModule,
RouterModule,
],
exports: [
MatDividerModule,
MatFormFieldModule,
],
providers: [BasicService],
bootstrap: [AppComponent],
entryComponents: [
MyDialogComponent,
SvCreationPopupComponent,
FvCreationPopupComponent,
]
})

export class AppModule {

}

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@Component({
selector: 'app-fv-creation-popup',
templateUrl: './fv-creation-popup.component.html',
styleUrls: ['./fv-creation-popup.component.css']
})
export class FvCreationPopupComponent implements OnInit {

constructor(
public dialogRef: MatDialogRef<FvCreationPopupComponent>, // dialogRef is now a reference to the diaolog popup
@Inject(MAT_DIALOG_DATA) public data: any) { } // allows the sharing of data through dialogConfig.data

ngOnInit() {

}

submit(): void {
//TODO: implementation de la fonction
console.log("Submit fv-gameCard not implemented")
}

close(): void {
this.dialogRef.close();
}
gameType: string[] = ["Formes géométriques","Thématique"];

}

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import { /*async,*/ async, ComponentFixture, TestBed } from"@angular/core/testing";

import { MatDialogModule, MatDialogRef, MAT_DIALOG_DATA } from"@angular/material";
import { FvCreationPopupComponent } from"./fv-creation-popup.component";

describe("FvCreationPopupComponent", () => {
let component: FvCreationPopupComponent;
let fixture: ComponentFixture<FvCreationPopupComponent>;
// const mock: MatDialogRef<FvCreationPopupComponent> = new MatDialogRef<FvCreationPopupComponent>(null, null) ;

beforeEach(async(() => {
// const data: MyDialogComponent = null;
// data.message ="Dialog Message";
// tslint:disable-next-line:typedef
const mockDialogRef = {
close: jasmine.createSpy("close"),
};

TestBed.configureTestingModule({
imports: [MatDialogModule],
declarations: [ FvCreationPopupComponent ],
providers: [{ provide: MatDialogRef, useValue: {mockDialogRef} }, { provide: MAT_DIALOG_DATA, useValue: {} } ]})
.compileComponents();
}));

beforeEach(() => {
fixture = TestBed.createComponent(FvCreationPopupComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});

it("should create", () => {
expect(component).toBeTruthy();
});

});

我认为您必须在测试模块中包含MatDividerModule，您还必须对组件中使用的其他模块执行相同的操作：

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import { MatDialogModule, MatDialogRef, MAT_DIALOG_DATA } from"@angular/material";
import { FvCreationPopupComponent } from"./fv-creation-popup.component";

describe("FvCreationPopupComponent", () => {
let component: FvCreationPopupComponent;
let fixture: ComponentFixture<FvCreationPopupComponent>;
// const mock: MatDialogRef<FvCreationPopupComponent> = new MatDialogRef<FvCreationPopupComponent>(null, null) ;

beforeEach(async(() => {
// const data: MyDialogComponent = null;
// data.message ="Dialog Message";
// tslint:disable-next-line:typedef
const mockDialogRef = {
close: jasmine.createSpy("close"),
};

TestBed.configureTestingModule({
imports: [MatDialogModule, MatDividerModule, ...],
declarations: [ FvCreationPopupComponent ],
providers: [{ provide: MatDialogRef, useValue: {mockDialogRef} }, { provide: MAT_DIALOG_DATA, useValue: {} } ]})
.compileComponents();
}));

beforeEach(() => {
fixture = TestBed.createComponent(FvCreationPopupComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});

it("should create", () => {
expect(component).toBeTruthy();
});

});