[英]Angular unit test HTTP request header
I want to write a unit test to check the headers of a http request.我想编写一个单元测试来检查 http 请求的标头。 However, the test always ends with an error when I try to access the request header:
但是,当我尝试访问请求标头时,测试总是以错误结束:
it('should have my header', () => {
httpClient.get('/someURL').subscribe();
const req = httpTestingController.match({ method: 'get' });
console.log(req[0].request.headers);
expect(req[0].request.headers.has('Custom-Header')).toEqual(true);
httpTestingController.verify();
});
The unit test fails with the following error:单元测试失败并出现以下错误:
TypeError: Invalid attempt to spread non-iterable instance.
In order to be iterable, non-array objects must have a [Symbol.iterator]() method.
I tried out all kinds of ways but I always get this error in the "expect" line where I access the headers.我尝试了各种方法,但我总是在访问标题的“期望”行中收到此错误。 When I log the headers in the console, it looks like this:
当我在控制台中记录标题时,它看起来像这样:
LOG: HttpHeaders{normalizedNames: Map{}, lazyUpdate: [Object{name: ..., value: ..., op: ...}], headers: Map{}, lazyInit: HttpHeaders{normalizedNames: Map{}, lazyUpdate: null, headers: Map{}}}
Is there other code in your spec that uses the spread operator?您的规范中是否还有其他使用扩展运算符的代码?
See working example below please.请参阅下面的工作示例。
import { HttpClient, HttpClientModule, HttpHeaders, HttpRequest } from '@angular/common/http';
import {
HttpClientTestingModule,
HttpTestingController,
TestRequest,
} from '@angular/common/http/testing';
import { TestBed, waitForAsync } from '@angular/core/testing';
describe('headers test', () => {
let httpTestingController: HttpTestingController;
let httpClient: HttpClient;
beforeEach(
waitForAsync(() => {
void TestBed.configureTestingModule({
imports: [HttpClientTestingModule, HttpClientModule],
})
.compileComponents()
.then(() => {
httpTestingController = TestBed.inject(HttpTestingController);
httpClient = TestBed.inject(HttpClient);
});
}),
);
afterEach(() => {
httpTestingController
.match((req: HttpRequest<unknown>): boolean => true)
.forEach((req: TestRequest) => (!req.cancelled ? req.flush({}) : null));
httpTestingController.verify();
});
it('should have my header', () => {
const headers = new HttpHeaders().set('Custom-Header', 'test');
void httpClient.get('/someURL', { headers }).subscribe();
const req = httpTestingController.match('/someURL');
console.warn('req', req);
console.warn(req[0].request.headers);
expect(req[0].request.headers.has('Custom-Header')).toEqual(true);
});
});
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