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问题描述
我有一个DialogComponent,它具有以下构造函数,其中Dialog是自定义对象:
I have a DialogComponent that has the following constructor where Dialog is a custom object:
constructor(
public dialogRef: MatDialogRef<CustomDialogComponent>,
@Inject(MAT_DIALOG_DATA) public data: Dialog
)
我在Angular4中创建了以下TestBed:
I created the following TestBed in Angular4:
data = new Dialog()
data.message = 'Dialog Message'
TestBed.configureTestingModule({
imports: [MaterialModules],
declarations: [CustomDialogComponent],
providers: [MatDialogRef, { provide: Dialog, useValue: data }]
})
TestBed.overrideModule(BrowserDynamicTestingModule, {
set: {
entryComponents: [CustomDialogComponent]
}
})
await TestBed.compileComponents()
但是出现以下错误:
Failed: Can't resolve all parameters for MatDialogRef: (?, ?, ?).
Error: Can't resolve all parameters for MatDialogRef: (?, ?, ?).
将提供者更改为:
providers: [
{ provide: MatDialogRef, useValue: {} },
{ provide: MAT_DIALOG_DATA, useValue: data }
]
导致以下错误:
Error: No provider for Dialog!
我该如何解决?
推荐答案
我通过将组件构造函数更改为:
I solved it by changing the component constructor to:
constructor(
public dialogRef: MatDialogRef<CustomDialogComponent>,
@Inject(MAT_DIALOG_DATA) public data: Dialog | any
)
TestBed中的提供者为:
The providers in the TestBed were:
providers: [{ provide: MatDialogRef, useValue: {} }, { provide: MAT_DIALOG_DATA, useValue: data }]
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