import Vue from 'vue';
import mountComponent from 'helpers/vue_mount_component_helper';
import { TEST_HOST } from 'jest/helpers/test_constants';
import promoteMilestoneModal from '~/pages/milestones/shared/components/promote_milestone_modal.vue';
import eventHub from '~/pages/milestones/shared/event_hub';
import axios from '~/lib/utils/axios_utils';

describe('Promote milestone modal', () => {
  let vm;
  const Component = Vue.extend(promoteMilestoneModal);
  const milestoneMockData = {
    milestoneTitle: 'v1.0',
    url: `${TEST_HOST}/dummy/promote/milestones`,
    groupName: 'group',
  };

  describe('Modal title and description', () => {
    beforeEach(() => {
      vm = mountComponent(Component, milestoneMockData);
    });

    afterEach(() => {
      vm.$destroy();
    });

    it('contains the proper description', () => {
      expect(vm.text).toContain(
        `Promoting ${milestoneMockData.milestoneTitle} will make it available for all projects inside ${milestoneMockData.groupName}.`,
      );
    });

    it('contains the correct title', () => {
      expect(vm.title).toEqual('Promote v1.0 to group milestone?');
    });
  });

  describe('When requesting a milestone promotion', () => {
    beforeEach(() => {
      vm = mountComponent(Component, {
        ...milestoneMockData,
      });
      jest.spyOn(eventHub, '$emit').mockImplementation(() => {});
    });

    afterEach(() => {
      vm.$destroy();
    });

    it('redirects when a milestone is promoted', done => {
      const responseURL = `${TEST_HOST}/dummy/endpoint`;
      jest.spyOn(axios, 'post').mockImplementation(url => {
        expect(url).toBe(milestoneMockData.url);
        expect(eventHub.$emit).toHaveBeenCalledWith(
          'promoteMilestoneModal.requestStarted',
          milestoneMockData.url,
        );
        return Promise.resolve({
          request: {
            responseURL,
          },
        });
      });

      vm.onSubmit()
        .then(() => {
          expect(eventHub.$emit).toHaveBeenCalledWith('promoteMilestoneModal.requestFinished', {
            milestoneUrl: milestoneMockData.url,
            successful: true,
          });
        })
        .then(done)
        .catch(done.fail);
    });

    it('displays an error if promoting a milestone failed', done => {
      const dummyError = new Error('promoting milestone failed');
      dummyError.response = { status: 500 };
      jest.spyOn(axios, 'post').mockImplementation(url => {
        expect(url).toBe(milestoneMockData.url);
        expect(eventHub.$emit).toHaveBeenCalledWith(
          'promoteMilestoneModal.requestStarted',
          milestoneMockData.url,
        );
        return Promise.reject(dummyError);
      });

      vm.onSubmit()
        .catch(error => {
          expect(error).toBe(dummyError);
          expect(eventHub.$emit).toHaveBeenCalledWith('promoteMilestoneModal.requestFinished', {
            milestoneUrl: milestoneMockData.url,
            successful: false,
          });
        })
        .then(done)
        .catch(done.fail);
    });
  });
});