[英]Angular Karma Jasmine Unit Test An error was thrown in afterAll TypeError: users.forEach is not a function
[英]Angular unit test error ( finalSprintsList.map is not a function ) with jasmine karma
我正在嘗試為我的組件方法編寫單元測試,即populateSprintDropDown 。 這是我的組件代碼
setResponseForButton() {
let sortedList = this.teamboardService.sortSprintsBasedOnEndDate();
this.populateSprintDropDown(sortedList);
}
//finalSprintList that is returned by service is = [{id: "3712", name: "DCT 3.128.1 Sp1 (11Dec-24Dec)",
status: "ACTIVE", sprintLink: null, startDate: "2019-12-11"}]
populateSprintDropDown(finalSprintList: Array<any>) {
this.sprintsList = (<Array<Sprint>>finalSprintList).map(sprint => ({ item_id: sprint.id, item_text: sprint.name }));
}
測試:
it('populate sprint in sprint dropdown upon button click', () => {
let list = [{item_id: "3712", item_text: "DCT 3.128.1 Sp1 (11Dec-24Dec)"}]
component.sprintsList = list;
const spy = spyOn(component, 'populateSprintDropDown').and.callThrough();
component.setResponseForButton();
expect(spy).toBeDefined();
expect(spy).toHaveBeenCalled();
});
但是當我運行我的測試時,我收到了這個錯誤:
類型錯誤:finalSprintsList.map 不是函數。 我無法理解這是什么意思以及如何解決它。
您應該模擬teamboardService.sortSprintsBasedOnEndDate
方法。
請注意,方法component.populateSprintDropDown
不需要間諜,因為您可以檢查由此方法更新的值component.sprintsList
。
嘗試按如下方式重寫您的測試:
it('dropdown upon button click should update sprintsList', () => {
// given
const sortedList = [{
id: "3712",
name: "DCT 3.128.1 Sp1 (11Dec-24Dec)",
status: "ACTIVE",
sprintLink: null,
startDate: "2019-12-11"
}];
spyOn(component.teamboardService, 'sortSprintsBasedOnEndDate').and.returnValue(sortedList);
// when
component.setResponseForButton();
// then
const expected = [{item_id: "3712", item_text: "DCT 3.128.1 Sp1 (11Dec-24Dec)"}];
expect(component.sprintsList).toEqual(expected );
});
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