我有这4个单元测试。

const handleHttp = (method: 'POST' | 'GET' | 'PUT' | 'DELETE'): void => {
  const req = httptestingcontroller.expectone(`${environment.apiUrl}test`);
  expect(req.request.method).toEqual(method);
  return req.flush({ fake: 1 });
};

it('should make a POST request',fakeAsync(() => {
  service.post('test',{ fakeProp: 'fakeValue' }).then((res) => {
    expect(res).toEqual({ fake: 1 });
  });
  handleHttp('POST');
}));

it('should make a GET request',fakeAsync(() => {
  service.get('test').then((res) => {
    expect(res).toEqual({ fake: 1 });
  });
  handleHttp('GET');
}));

it('should make a PUT request',fakeAsync(() => {
  service.put('test',{ fakeProp: 'fakeValue' }).then((res) => {
    expect(res).toEqual({ fake: 1 });
  });
  handleHttp('PUT');
}));

it('should make a DELETE request',fakeAsync(() => {
  service.delete('test',{ fakeProp: 'fakeValue' }).then((res) => {
    expect(res).toEqual({ fake: 1 });
  });
  handleHttp('DELETE');
}));

方法选项参数都相同：

post<T>(url: string,body: object,options: object = this.httpoptions): Promise<T> {
get<T>(url: string,options: object = this.httpoptions): Promise<T> {
put<T>(url: string,options: object = this.httpoptions): Promise<T> {
delete<T>(url: string,options: object = this.httpoptions): Promise<T> {

结果：

75％的分支3/4

屏幕截图：

仅不覆盖最后一个参数options，而覆盖前三个参数。

库：

"jasmine-core": "~3.4.0","jasmine-spec-reporter": "~4.2.1","karma": "~4.1.0","karma-chrome-launcher": "~2.2.0","karma-coverage-istanbul-reporter": "~2.0.1","karma-jasmine": "~2.0.1","karma-jasmine-html-reporter": "^1.4.0",

所以问题：为什么分支覆盖范围看起来是随机的，还是我的代码中缺少某些内容？我应该运行测试还是不重要？