我正在为一个组件编写一些单元测试,但它的状态在测试之间持续存在。
我已经看了here,但没有一个解决方案有所作为。
我的简化测试代码是:
describe('Component: HerdIndexComponent', () => {
beforeEach(() => {
TestBed.configureTestingModule({
imports: [FormsModule],
declarations: [
HerdIndexComponent,
],
providers: [
{provide: ActivatedRoute, useValue: activatedRouteStub},
{provide: HerdIndexService, useValue: herdIndexServiceStub},
]
});
fixture = TestBed.createComponent(HerdIndexComponent);
component = fixture.debugElement.componentInstance;
});
it('should not show error when formula is valid', fakeAsync(() => {
fixture.detectChanges();
const input = fixture.debugElement.queryAll(By.css('.pta-components tbody tr'))[0].query(By.css('input'));
input.nativeElement.value = '1';
input.nativeElement.dispatchEvent(newEvent('keyup'));
fixture.detectChanges();
const error = fixture.debugElement.query(By.css('.error'));
expect(error.nativeElement.textContent).toBe('');
}));
describe('Functionality: Saving', () => {
let saveButtonDe;
beforeEach(() => {
fixture.detectChanges();
const input0 = fixture.debugElement.queryAll(By.css('.pta-components tbody tr'))[0].query(By.css('input'));
const input1 = fixture.debugElement.queryAll(By.css('.pta-components tbody tr'))[1].query(By.css('input'));
input0.nativeElement.value = '0.5';
input1.nativeElement.value = '0.5';
input0.nativeElement.dispatchEvent(newEvent('keyup'));
input1.nativeElement.dispatchEvent(newEvent('keyup'));
saveButtonDe = fixture.debugElement.query(By.css('button'));
});
it('should save a valid formula', fakeAsync(() => {
fixture.detectChanges();
console.log(component.formula.components.map(com => com.coefficient.decimalValue));
saveButtonDe.nativeElement.dispatchEvent(newEvent('click'));
fixture.detectChanges();
tick();
fixture.detectChanges();
const error = fixture.debugElement.query(By.css('.error'));
const success = fixture.debugElement.query(By.css('.success'));
expect(error.nativeElement.textContent.trim()).toBe('');
expect(success.nativeElement.textContent.trim()).toBe('Formula Saved');
console.log(component);
}));
});
});
请注意,HerdIndexComponent有一个包含11个输入的数组。这一行将选择第五行:
fixture.debugElement.queryAll(By.css('.pta-components tbody tr'))[4].query(By.css('input'));
目前,问题正在'should save a valid formula'
测试中展示,其中第一个输入已经具有上述测试中的值1
。如果我要在第二个beforeEach
中选择2个不同的输入,则测试失败(公式仅在输入总和为1时有效,否则将总和为2,即1 + 0.5 + 0.5
)。
这是我几乎可以粘贴的,因为我的组件有多个依赖模型,但这不重要。
有什么想法吗?我以为我跟着docs来信了。
答案 0 :(得分:0)
我看不到您正在编译组件。
通常,您应该编译组件以验证测试模块的配置。
试试这个,而不是第一个beforeEach
beforeEach(async(() => {
TestBed.configureTestingModule({
imports: [FormsModule],
declarations: [
HerdIndexComponent,
],
providers: [
{provide: ActivatedRoute, useValue: activatedRouteStub},
{provide: HerdIndexService, useValue: herdIndexServiceStub},
]
})
.compileComponents;
}));
beforeEach(() => {
fixture = TestBed.createComponent(HerdIndexComponent);
component = fixture.debugElement.componentInstance;
fixture.detectChanges();
});