如何在 Jasmine 中对 httpParams 进行单元测试

Question

I'm pretty new in unit testing. I have a function which is setting query params:

setParams(scale): HttpParams {
    return this.params = new HttpParams()
        .set('scale', scale);
}

The output is passing right to the http get method. But I have no idea how to test if the function above is really giving http params. Can anyone give me some advice? Thanks!

Answer 1

Something along the lines of:

it('should set params', () => {
  const params = service.setParams('hello'); // I assume this is in the service code
  expect(params.get('scale')).toBe('hello');
});