我正在尝试在以下内容中模拟 this.editedComponentDetailsData.find
:
editButtonClicked(event) {
let rowData = this.editedComponentDetailsData.find((row) => {
return row.operationalSequenceNumber == this.rowKey;
})
}
这不起作用:
it('should do something', () => {
let result=spyOn(subject.editedComponentDetailsData.prototype,'find').and.returnValue({prop1:''});
});
最佳答案
只需为 editedComponentDetailsData
分配一个像空数组一样可迭代的属性,然后您就可以监视查找,但您只需在没有原型(prototype)的情况下访问它,就像在组件内部一样。
beforeEach(() => {
TestBed.resetTestEnvironment();
TestBed.initTestEnvironment(BrowserDynamicTestingModule,
platformBrowserDynamicTesting())
TestBed.configureTestingModule({
declarations: [AppComponent],
providers: [
AppComponent
],
schemas: [NO_ERRORS_SCHEMA]
});
fixture = TestBed.createComponent(AppComponent);
subject = fixture.componentInstance;
subject.editedComponentDetailsData=[]; //mock with empty array
});
it('should do something', () => {
let result=spyOn(subject.editedComponentDetailsData,'find').and.returnValue({prop1:''}); //the spy
});
关于javascript - 如何监视原生 JavaScript 函数?比如.find()?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56933483/