Rewrite related MRs widget with Vue

This MR rewrites existing Related Merge Requests widget
with Vue with reusing shared Related Issues components

3 files changed, 248 insertions, 0 deletions

diff --git a/spec/javascripts/related_merge_requests/components/related_merge_requests_spec.js b/spec/javascripts/related_merge_requests/components/related_merge_requests_spec.js
new file mode 100644
index 00000000000..29760f79c3c
--- /dev/null
+++ b/spec/javascripts/related_merge_requests/components/related_merge_requests_spec.js
@@ -0,0 +1,89 @@
+import { mount, createLocalVue } from '@vue/test-utils';
+import MockAdapter from 'axios-mock-adapter';
+import axios from '~/lib/utils/axios_utils';
+import RelatedIssuableItem from '~/vue_shared/components/issue/related_issuable_item.vue';
+import RelatedMergeRequests from '~/related_merge_requests/components/related_merge_requests.vue';
+import createStore from '~/related_merge_requests/store/index';
+
+const FIXTURE_PATH = 'issues/related_merge_requests.json';
+const API_ENDPOINT = '/api/v4/projects/2/issues/33/related_merge_requests';
+const localVue = createLocalVue();
+
+describe('RelatedMergeRequests', () => {
+  let wrapper;
+  let mock;
+  let mockData;
+
+  beforeEach(done => {
+    loadFixtures(FIXTURE_PATH);
+    mockData = getJSONFixture(FIXTURE_PATH);
+    mock = new MockAdapter(axios);
+    mock.onGet(`${API_ENDPOINT}?per_page=100`).reply(200, mockData, { 'x-total': 2 });
+
+    wrapper = mount(RelatedMergeRequests, {
+      localVue,
+      sync: false,
+      store: createStore(),
+      propsData: {
+        endpoint: API_ENDPOINT,
+        projectNamespace: 'gitlab-org',
+        projectPath: 'gitlab-ce',
+      },
+    });
+
+    setTimeout(done);
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+    mock.restore();
+  });
+
+  describe('methods', () => {
+    describe('getAssignees', () => {
+      const assignees = [{ name: 'foo' }, { name: 'bar' }];
+
+      describe('when there is assignees array', () => {
+        it('should return assignees array', () => {
+          const mr = { assignees };
+
+          expect(wrapper.vm.getAssignees(mr)).toEqual(assignees);
+        });
+      });
+
+      it('should return an array with single assingee', () => {
+        const mr = { assignee: assignees[0] };
+
+        expect(wrapper.vm.getAssignees(mr)).toEqual([assignees[0]]);
+      });
+
+      it('should return empty array when assignee is not set', () => {
+        expect(wrapper.vm.getAssignees({})).toEqual([]);
+        expect(wrapper.vm.getAssignees({ assignee: null })).toEqual([]);
+      });
+    });
+  });
+
+  describe('template', () => {
+    it('should render related merge request items', () => {
+      expect(wrapper.find('.js-items-count').text()).toEqual('2');
+      expect(wrapper.findAll(RelatedIssuableItem).length).toEqual(2);
+
+      const props = wrapper
+        .findAll(RelatedIssuableItem)
+        .at(1)
+        .props();
+      const data = mockData[1];
+
+      expect(props.idKey).toEqual(data.id);
+      expect(props.pathIdSeparator).toEqual('!');
+      expect(props.pipelineStatus).toBe(data.head_pipeline.detailed_status);
+      expect(props.assignees).toEqual([data.assignee]);
+      expect(props.isMergeRequest).toBe(true);
+      expect(props.confidential).toEqual(false);
+      expect(props.title).toEqual(data.title);
+      expect(props.state).toEqual(data.state);
+      expect(props.createdAt).toEqual(data.created_at);
+    });
+  });
+});
diff --git a/spec/javascripts/related_merge_requests/store/actions_spec.js b/spec/javascripts/related_merge_requests/store/actions_spec.js
new file mode 100644
index 00000000000..65e436fbb17
--- /dev/null
+++ b/spec/javascripts/related_merge_requests/store/actions_spec.js
@@ -0,0 +1,110 @@
+import MockAdapter from 'axios-mock-adapter';
+import axios from '~/lib/utils/axios_utils';
+import * as types from '~/related_merge_requests/store/mutation_types';
+import actionsModule, * as actions from '~/related_merge_requests/store/actions';
+import testAction from 'spec/helpers/vuex_action_helper';
+
+describe('RelatedMergeRequest store actions', () => {
+  let state;
+  let flashSpy;
+  let mock;
+
+  beforeEach(() => {
+    state = {
+      apiEndpoint: '/api/related_merge_requests',
+    };
+    flashSpy = spyOnDependency(actionsModule, 'createFlash');
+    mock = new MockAdapter(axios);
+  });
+
+  afterEach(() => {
+    mock.restore();
+  });
+
+  describe('setInitialState', () => {
+    it('commits types.SET_INITIAL_STATE with given props', done => {
+      const props = { a: 1, b: 2 };
+
+      testAction(
+        actions.setInitialState,
+        props,
+        {},
+        [{ type: types.SET_INITIAL_STATE, payload: props }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('requestData', () => {
+    it('commits types.REQUEST_DATA', done => {
+      testAction(actions.requestData, null, {}, [{ type: types.REQUEST_DATA }], [], done);
+    });
+  });
+
+  describe('receiveDataSuccess', () => {
+    it('commits types.RECEIVE_DATA_SUCCESS with data', done => {
+      const data = { a: 1, b: 2 };
+
+      testAction(
+        actions.receiveDataSuccess,
+        data,
+        {},
+        [{ type: types.RECEIVE_DATA_SUCCESS, payload: data }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('receiveDataError', () => {
+    it('commits types.RECEIVE_DATA_ERROR', done => {
+      testAction(
+        actions.receiveDataError,
+        null,
+        {},
+        [{ type: types.RECEIVE_DATA_ERROR }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('fetchMergeRequests', () => {
+    describe('for a successful request', () => {
+      it('should dispatch success action', done => {
+        const data = { a: 1 };
+        mock.onGet(`${state.apiEndpoint}?per_page=100`).replyOnce(200, data, { 'x-total': 2 });
+
+        testAction(
+          actions.fetchMergeRequests,
+          null,
+          state,
+          [],
+          [{ type: 'requestData' }, { type: 'receiveDataSuccess', payload: { data, total: 2 } }],
+          done,
+        );
+      });
+    });
+
+    describe('for a failing request', () => {
+      it('should dispatch error action', done => {
+        mock.onGet(`${state.apiEndpoint}?per_page=100`).replyOnce(400);
+
+        testAction(
+          actions.fetchMergeRequests,
+          null,
+          state,
+          [],
+          [{ type: 'requestData' }, { type: 'receiveDataError' }],
+          () => {
+            expect(flashSpy).toHaveBeenCalledTimes(1);
+            expect(flashSpy).toHaveBeenCalledWith(jasmine.stringMatching('Something went wrong'));
+
+            done();
+          },
+        );
+      });
+    });
+  });
+});
diff --git a/spec/javascripts/related_merge_requests/store/mutations_spec.js b/spec/javascripts/related_merge_requests/store/mutations_spec.js
new file mode 100644
index 00000000000..21b6e26376b
--- /dev/null
+++ b/spec/javascripts/related_merge_requests/store/mutations_spec.js
@@ -0,0 +1,49 @@
+import mutations from '~/related_merge_requests/store/mutations';
+import * as types from '~/related_merge_requests/store/mutation_types';
+
+describe('RelatedMergeRequests Store Mutations', () => {
+  describe('SET_INITIAL_STATE', () => {
+    it('should set initial state according to given data', () => {
+      const apiEndpoint = '/api';
+      const state = {};
+
+      mutations[types.SET_INITIAL_STATE](state, { apiEndpoint });
+
+      expect(state.apiEndpoint).toEqual(apiEndpoint);
+    });
+  });
+
+  describe('REQUEST_DATA', () => {
+    it('should set loading flag', () => {
+      const state = {};
+
+      mutations[types.REQUEST_DATA](state);
+
+      expect(state.isFetchingMergeRequests).toEqual(true);
+    });
+  });
+
+  describe('RECEIVE_DATA_SUCCESS', () => {
+    it('should set loading flag and data', () => {
+      const state = {};
+      const mrs = [1, 2, 3];
+
+      mutations[types.RECEIVE_DATA_SUCCESS](state, { data: mrs, total: mrs.length });
+
+      expect(state.isFetchingMergeRequests).toEqual(false);
+      expect(state.mergeRequests).toEqual(mrs);
+      expect(state.totalCount).toEqual(mrs.length);
+    });
+  });
+
+  describe('RECEIVE_DATA_ERROR', () => {
+    it('should set loading and error flags', () => {
+      const state = {};
+
+      mutations[types.RECEIVE_DATA_ERROR](state);
+
+      expect(state.isFetchingMergeRequests).toEqual(false);
+      expect(state.hasErrorFetchingMergeRequests).toEqual(true);
+    });
+  });
+});