Test Axios promise with jasmine-ajax

service_spec.js

import Service from 'path/to/service';
import 'jasmine-ajax'

describe('Service', () => {
  let request, promise;
  let instance = Service;
  let payload = {foo:'bar'};
  let path = '/path';
  let callback = jasmine.createSpy('callback');

  beforeEach(() => {
    jasmine.Ajax.install();
  })

  afterEach(() => {
    jasmine.Ajax.uninstall();
  });

  describe('get', () => {
    it('sends a get request and calls the callback with the response', (done) => {
      promise = instance.get(path, callback);
      promise.then((result) => {
        expect(callback).toHaveBeenCalledWith(200, 'foo');
        done();
      });

      setTimeout(function () {
        request = jasmine.Ajax.requests.mostRecent();
        expect(request.url).toBe(path);
        expect(request.method).toBe('GET');
        request.respondWith({
          "status": 200,
          "contentType": 'text/plain',
          "responseText": 'foo'
        })
      }, 0);
    })
  });

  describe('post', () => {
    it('calls request with the correct args and calls the callback with the response', (done) => {
      promise = instance.post(path, payload, callback);
      promise.then((result) => {
        expect(callback).toHaveBeenCalledWith(200, payload);
        done();
      });

      setTimeout(function () {
        request = jasmine.Ajax.requests.mostRecent();
        expect(request.url).toBe(path);
        expect(request.method).toBe('POST');
        expect(request.responseType).toBe('json');
        expect(request.data()).toEqual(payload);
        request.respondWith({
          "status": 200,
          "contentType": 'text/plain',
          "responseText": JSON.stringify(payload)
        })
      }, 0);
    });
  });

  describe('patch', () => {
    it('calls request with the correct args and calls the callback with the response', (done) => {
      promise = instance.patch(path, payload, callback);
      promise.then((result) => {
        expect(callback).toHaveBeenCalledWith(200, payload);
        done();
      });

      setTimeout(function () {
        var request = jasmine.Ajax.requests.mostRecent();
        expect(request.url).toBe(path);
        expect(request.method).toBe('PATCH');
        expect(request.responseType).toBe('json');
        expect(request.data()).toEqual(payload);
        request.respondWith({
          "status": 200,
          "contentType": 'text/plain',
          "responseText": JSON.stringify(payload)
        })
      }, 0);
    });
  });
});