Merge branch '50101-vuex-store' into 'master'

Adds Vuex store for the job log page

See merge request gitlab-org/gitlab-ce!21312

10 files changed, 1224 insertions, 7 deletions

diff --git a/app/assets/javascripts/jobs/store/actions.js b/app/assets/javascripts/jobs/store/actions.js
new file mode 100644
index 00000000000..7f5406d6f43
--- /dev/null
+++ b/app/assets/javascripts/jobs/store/actions.js
@@ -0,0 +1,175 @@
+import Visibility from 'visibilityjs';
+import * as types from './mutation_types';
+import axios from '../../lib/utils/axios_utils';
+import Poll from '../../lib/utils/poll';
+import { setCiStatusFavicon } from '../../lib/utils/common_utils';
+import flash from '../../flash';
+import { __ } from '../../locale';
+
+export const setJobEndpoint = ({ commit }, endpoint) => commit(types.SET_JOB_ENDPOINT, endpoint);
+export const setTraceEndpoint = ({ commit }, endpoint) =>
+  commit(types.SET_TRACE_ENDPOINT, endpoint);
+export const setStagesEndpoint = ({ commit }, endpoint) =>
+  commit(types.SET_STAGES_ENDPOINT, endpoint);
+export const setJobsEndpoint = ({ commit }, endpoint) => commit(types.SET_JOBS_ENDPOINT, endpoint);
+
+let eTagPoll;
+
+export const clearEtagPoll = () => {
+  eTagPoll = null;
+};
+
+export const stopPolling = () => {
+  if (eTagPoll) eTagPoll.stop();
+};
+
+export const restartPolling = () => {
+  if (eTagPoll) eTagPoll.restart();
+};
+
+export const requestJob = ({ commit }) => commit(types.REQUEST_JOB);
+
+export const fetchJob = ({ state, dispatch }) => {
+  dispatch('requestJob');
+
+  eTagPoll = new Poll({
+    resource: {
+      getJob(endpoint) {
+        return axios.get(endpoint);
+      },
+    },
+    data: state.jobEndpoint,
+    method: 'getJob',
+    successCallback: ({ data }) => dispatch('receiveJobSuccess', data),
+    errorCallback: () => dispatch('receiveJobError'),
+  });
+
+  if (!Visibility.hidden()) {
+    eTagPoll.makeRequest();
+  } else {
+    axios
+      .get(state.jobEndpoint)
+      .then(({ data }) => dispatch('receiveJobSuccess', data))
+      .catch(() => dispatch('receiveJobError'));
+  }
+
+  Visibility.change(() => {
+    if (!Visibility.hidden()) {
+      dispatch('restartPolling');
+    } else {
+      dispatch('stopPolling');
+    }
+  });
+};
+
+export const receiveJobSuccess = ({ commit }, data) => commit(types.RECEIVE_JOB_SUCCESS, data);
+export const receiveJobError = ({ commit }) => {
+  commit(types.RECEIVE_JOB_ERROR);
+  flash(__('An error occurred while fetching the job.'));
+};
+
+/**
+ * Job's Trace
+ */
+export const scrollTop = ({ commit }) => {
+  commit(types.SCROLL_TO_TOP);
+  window.scrollTo({ top: 0 });
+};
+
+export const scrollBottom = ({ commit }) => {
+  commit(types.SCROLL_TO_BOTTOM);
+  window.scrollTo({ top: document.height });
+};
+
+export const requestTrace = ({ commit }) => commit(types.REQUEST_TRACE);
+
+let traceTimeout;
+export const fetchTrace = ({ dispatch, state }) => {
+  dispatch('requestTrace');
+
+  axios
+    .get(`${state.traceEndpoint}/trace.json`, {
+      params: { state: state.traceState },
+    })
+    .then(({ data }) => {
+      if (!state.fetchingStatusFavicon) {
+        dispatch('fetchFavicon');
+      }
+      dispatch('receiveTraceSuccess', data);
+
+      if (!data.complete) {
+        traceTimeout = setTimeout(() => {
+          dispatch('fetchTrace');
+        }, 4000);
+      } else {
+        dispatch('stopPollingTrace');
+      }
+    })
+    .catch(() => dispatch('receiveTraceError'));
+};
+export const stopPollingTrace = ({ commit }) => {
+  commit(types.STOP_POLLING_TRACE);
+  clearTimeout(traceTimeout);
+};
+export const receiveTraceSuccess = ({ commit }, log) => commit(types.RECEIVE_TRACE_SUCCESS, log);
+export const receiveTraceError = ({ commit }) => {
+  commit(types.RECEIVE_TRACE_ERROR);
+  clearTimeout(traceTimeout);
+  flash(__('An error occurred while fetching the job log.'));
+};
+
+export const fetchFavicon = ({ state, dispatch }) => {
+  dispatch('requestStatusFavicon');
+  setCiStatusFavicon(`${state.pagePath}/status.json`)
+    .then(() => dispatch('receiveStatusFaviconSuccess'))
+    .catch(() => dispatch('requestStatusFaviconError'));
+};
+export const requestStatusFavicon = ({ commit }) => commit(types.REQUEST_STATUS_FAVICON);
+export const receiveStatusFaviconSuccess = ({ commit }) =>
+  commit(types.RECEIVE_STATUS_FAVICON_SUCCESS);
+export const requestStatusFaviconError = ({ commit }) => commit(types.RECEIVE_STATUS_FAVICON_ERROR);
+
+/**
+ * Stages dropdown on sidebar
+ */
+export const requestStages = ({ commit }) => commit(types.REQUEST_STAGES);
+export const fetchStages = ({ state, dispatch }) => {
+  dispatch('requestStages');
+
+  axios
+    .get(state.stagesEndpoint)
+    .then(({ data }) => dispatch('receiveStagesSuccess', data))
+    .catch(() => dispatch('receiveStagesError'));
+};
+export const receiveStagesSuccess = ({ commit }, data) =>
+  commit(types.RECEIVE_STAGES_SUCCESS, data);
+export const receiveStagesError = ({ commit }) => {
+  commit(types.RECEIVE_STAGES_ERROR);
+  flash(__('An error occurred while fetching stages.'));
+};
+
+/**
+ * Jobs list on sidebar - depend on stages dropdown
+ */
+export const requestJobsForStage = ({ commit }) => commit(types.REQUEST_JOBS_FOR_STAGE);
+export const setSelectedStage = ({ commit }, stage) => commit(types.SET_SELECTED_STAGE, stage);
+
+// On stage click, set selected stage + fetch job
+export const fetchJobsForStage = ({ state, dispatch }, stage) => {
+  dispatch('setSelectedStage', stage);
+  dispatch('requestJobsForStage');
+
+  axios
+    .get(state.stageJobsEndpoint)
+    .then(({ data }) => dispatch('receiveJobsForStageSuccess', data))
+    .catch(() => dispatch('receiveJobsForStageError'));
+};
+export const receiveJobsForStageSuccess = ({ commit }, data) =>
+  commit(types.RECEIVE_JOBS_FOR_STAGE_SUCCESS, data);
+export const receiveJobsForStageError = ({ commit }) => {
+  commit(types.RECEIVE_JOBS_FOR_STAGE_ERROR);
+  flash(__('An error occurred while fetching the jobs.'));
+};
+
+// prevent babel-plugin-rewire from generating an invalid default during karma tests
+export default () => {};
diff --git a/app/assets/javascripts/jobs/store/index.js b/app/assets/javascripts/jobs/store/index.js
new file mode 100644
index 00000000000..d8f6f56ce61
--- /dev/null
+++ b/app/assets/javascripts/jobs/store/index.js
@@ -0,0 +1,13 @@
+import Vue from 'vue';
+import Vuex from 'vuex';
+import state from './state';
+import * as actions from './actions';
+import mutations from './mutations';
+
+Vue.use(Vuex);
+
+export default () => new Vuex.Store({
+  actions,
+  mutations,
+  state: state(),
+});
diff --git a/app/assets/javascripts/jobs/store/mutation_types.js b/app/assets/javascripts/jobs/store/mutation_types.js
new file mode 100644
index 00000000000..e66e1d4f116
--- /dev/null
+++ b/app/assets/javascripts/jobs/store/mutation_types.js
@@ -0,0 +1,29 @@
+export const SET_JOB_ENDPOINT = 'SET_JOB_ENDPOINT';
+export const SET_TRACE_ENDPOINT = 'SET_TRACE_ENDPOINT';
+export const SET_STAGES_ENDPOINT = 'SET_STAGES_ENDPOINT';
+export const SET_JOBS_ENDPOINT = 'SET_JOBS_ENDPOINT';
+
+export const SCROLL_TO_TOP = 'SCROLL_TO_TOP';
+export const SCROLL_TO_BOTTOM = 'SCROLL_TO_BOTTOM';
+
+export const REQUEST_JOB = 'REQUEST_JOB';
+export const RECEIVE_JOB_SUCCESS = 'RECEIVE_JOB_SUCCESS';
+export const RECEIVE_JOB_ERROR = 'RECEIVE_JOB_ERROR';
+
+export const REQUEST_TRACE = 'REQUEST_TRACE';
+export const STOP_POLLING_TRACE = 'STOP_POLLING_TRACE';
+export const RECEIVE_TRACE_SUCCESS = 'RECEIVE_TRACE_SUCCESS';
+export const RECEIVE_TRACE_ERROR = 'RECEIVE_TRACE_ERROR';
+
+export const REQUEST_STATUS_FAVICON = 'REQUEST_STATUS_FAVICON';
+export const RECEIVE_STATUS_FAVICON_SUCCESS = 'RECEIVE_STATUS_FAVICON_SUCCESS';
+export const RECEIVE_STATUS_FAVICON_ERROR = 'RECEIVE_STATUS_FAVICON_ERROR';
+
+export const REQUEST_STAGES = 'REQUEST_STAGES';
+export const RECEIVE_STAGES_SUCCESS = 'RECEIVE_STAGES_SUCCESS';
+export const RECEIVE_STAGES_ERROR = 'RECEIVE_STAGES_ERROR';
+
+export const SET_SELECTED_STAGE = 'SET_SELECTED_STAGE';
+export const REQUEST_JOBS_FOR_STAGE = 'REQUEST_JOBS_FOR_STAGE';
+export const RECEIVE_JOBS_FOR_STAGE_SUCCESS = 'RECEIVE_JOBS_FOR_STAGE_SUCCESS';
+export const RECEIVE_JOBS_FOR_STAGE_ERROR = 'RECEIVE_JOBS_FOR_STAGE_ERROR';
diff --git a/app/assets/javascripts/jobs/store/mutations.js b/app/assets/javascripts/jobs/store/mutations.js
new file mode 100644
index 00000000000..2a451ef0cd1
--- /dev/null
+++ b/app/assets/javascripts/jobs/store/mutations.js
@@ -0,0 +1,94 @@
+/* eslint-disable no-param-reassign */
+
+import * as types from './mutation_types';
+
+export default {
+  [types.REQUEST_STATUS_FAVICON](state) {
+    state.fetchingStatusFavicon = true;
+  },
+  [types.RECEIVE_STATUS_FAVICON_SUCCESS](state) {
+    state.fetchingStatusFavicon = false;
+  },
+  [types.RECEIVE_STATUS_FAVICON_ERROR](state) {
+    state.fetchingStatusFavicon = false;
+  },
+
+  [types.RECEIVE_TRACE_SUCCESS](state, log) {
+    if (log.state) {
+      state.traceState = log.state;
+    }
+
+    if (log.append) {
+      state.trace += log.html;
+      state.traceSize += log.size;
+    } else {
+      state.trace = log.html;
+      state.traceSize = log.size;
+    }
+
+    if (state.traceSize < log.total) {
+      state.isTraceSizeVisible = true;
+    } else {
+      state.isTraceSizeVisible = false;
+    }
+
+    state.isTraceComplete = log.complete;
+    state.hasTraceError = false;
+  },
+  [types.STOP_POLLING_TRACE](state) {
+    state.isTraceComplete = true;
+  },
+  // todo_fl: check this.
+  [types.RECEIVE_TRACE_ERROR](state) {
+    state.isLoadingTrace = false;
+    state.isTraceComplete = true;
+    state.hasTraceError = true;
+  },
+
+  [types.REQUEST_JOB](state) {
+    state.isLoading = true;
+  },
+  [types.RECEIVE_JOB_SUCCESS](state, job) {
+    state.isLoading = false;
+    state.hasError = false;
+    state.job = job;
+  },
+  [types.RECEIVE_JOB_ERROR](state) {
+    state.isLoading = false;
+    state.hasError = true;
+    state.job = {};
+  },
+
+  [types.SCROLL_TO_TOP](state) {
+    state.isTraceScrolledToBottom = false;
+    state.hasBeenScrolled = true;
+  },
+  [types.SCROLL_TO_BOTTOM](state) {
+    state.isTraceScrolledToBottom = true;
+    state.hasBeenScrolled = true;
+  },
+
+  [types.REQUEST_STAGES](state) {
+    state.isLoadingStages = true;
+  },
+  [types.RECEIVE_STAGES_SUCCESS](state, stages) {
+    state.isLoadingStages = false;
+    state.stages = stages;
+  },
+  [types.RECEIVE_STAGES_ERROR](state) {
+    state.isLoadingStages = false;
+    state.stages = [];
+  },
+
+  [types.REQUEST_JOBS_FOR_STAGE](state) {
+    state.isLoadingJobs = true;
+  },
+  [types.RECEIVE_JOBS_FOR_STAGE_SUCCESS](state, jobs) {
+    state.isLoadingJobs = false;
+    state.jobs = jobs;
+  },
+  [types.RECEIVE_JOBS_FOR_STAGE_ERROR](state) {
+    state.isLoadingJobs = false;
+    state.jobs = [];
+  },
+};
diff --git a/app/assets/javascripts/jobs/store/state.js b/app/assets/javascripts/jobs/store/state.js
new file mode 100644
index 00000000000..509cb69a5d3
--- /dev/null
+++ b/app/assets/javascripts/jobs/store/state.js
@@ -0,0 +1,40 @@
+export default () => ({
+  jobEndpoint: null,
+  traceEndpoint: null,
+
+  // dropdown options
+  stagesEndpoint: null,
+  // list of jobs on sidebard
+  stageJobsEndpoint: null,
+
+  // job log
+  isLoading: false,
+  hasError: false,
+  job: {},
+
+  // trace
+  isLoadingTrace: false,
+  hasTraceError: false,
+
+  trace: '',
+
+  isTraceScrolledToBottom: false,
+  hasBeenScrolled: false,
+
+  isTraceComplete: false,
+  traceSize: 0, // todo_fl: needs to be converted into human readable format in components
+  isTraceSizeVisible: false,
+
+  fetchingStatusFavicon: false,
+  // used as a query parameter
+  traceState: null,
+  // used to check if we need to redirect the user - todo_fl:  check if actually needed
+  traceStatus: null,
+
+  // sidebar dropdown
+  isLoadingStages: false,
+  isLoadingJobs: false,
+  selectedStage: null,
+  stages: [],
+  jobs: [],
+});
diff --git a/app/assets/javascripts/lib/utils/common_utils.js b/app/assets/javascripts/lib/utils/common_utils.js
index 2f3dd6f6cbc..3e208764b3e 100644
--- a/app/assets/javascripts/lib/utils/common_utils.js
+++ b/app/assets/javascripts/lib/utils/common_utils.js
@@ -491,7 +491,10 @@ export const setCiStatusFavicon = pageUrl =>
       }
       return resetFavicon();
     })
-    .catch(resetFavicon);
+    .catch((error) => {
+      resetFavicon();
+      throw error;
+    });
 
 export const spriteIcon = (icon, className = '') => {
   const classAttribute = className.length > 0 ? `class="${className}"` : '';
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index 936b85146d4..2eb69695406 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -505,6 +505,18 @@ msgstr ""
 msgid "An error occurred while fetching sidebar data"
 msgstr ""
 
+msgid "An error occurred while fetching stages."
+msgstr ""
+
+msgid "An error occurred while fetching the job log."
+msgstr ""
+
+msgid "An error occurred while fetching the job."
+msgstr ""
+
+msgid "An error occurred while fetching the jobs."
+msgstr ""
+
 msgid "An error occurred while fetching the pipeline."
 msgstr ""
 
diff --git a/spec/javascripts/jobs/store/actions_spec.js b/spec/javascripts/jobs/store/actions_spec.js
new file mode 100644
index 00000000000..5042718dfa0
--- /dev/null
+++ b/spec/javascripts/jobs/store/actions_spec.js
@@ -0,0 +1,625 @@
+import MockAdapter from 'axios-mock-adapter';
+import axios from '~/lib/utils/axios_utils';
+import {
+  setJobEndpoint,
+  setTraceEndpoint,
+  setStagesEndpoint,
+  setJobsEndpoint,
+  clearEtagPoll,
+  stopPolling,
+  requestJob,
+  fetchJob,
+  receiveJobSuccess,
+  receiveJobError,
+  scrollTop,
+  scrollBottom,
+  requestTrace,
+  fetchTrace,
+  stopPollingTrace,
+  receiveTraceSuccess,
+  receiveTraceError,
+  fetchFavicon,
+  requestStatusFavicon,
+  receiveStatusFaviconSuccess,
+  requestStatusFaviconError,
+  requestStages,
+  fetchStages,
+  receiveStagesSuccess,
+  receiveStagesError,
+  requestJobsForStage,
+  setSelectedStage,
+  fetchJobsForStage,
+  receiveJobsForStageSuccess,
+  receiveJobsForStageError,
+} from '~/jobs/store/actions';
+import state from '~/jobs/store/state';
+import * as types from '~/jobs/store/mutation_types';
+import testAction from 'spec/helpers/vuex_action_helper';
+import { TEST_HOST } from 'spec/test_constants';
+
+describe('Job State actions', () => {
+  let mockedState;
+
+  beforeEach(() => {
+    mockedState = state();
+  });
+
+  describe('setJobEndpoint', () => {
+    it('should commit SET_JOB_ENDPOINT mutation', done => {
+      testAction(
+        setJobEndpoint,
+        'job/872324.json',
+        mockedState,
+        [{ type: types.SET_JOB_ENDPOINT, payload: 'job/872324.json' }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('setTraceEndpoint', () => {
+    it('should commit SET_TRACE_ENDPOINT mutation', done => {
+      testAction(
+        setTraceEndpoint,
+        'job/872324/trace.json',
+        mockedState,
+        [{ type: types.SET_TRACE_ENDPOINT, payload: 'job/872324/trace.json' }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('setStagesEndpoint', () => {
+    it('should commit SET_STAGES_ENDPOINT mutation', done => {
+      testAction(
+        setStagesEndpoint,
+        'job/872324/stages.json',
+        mockedState,
+        [{ type: types.SET_STAGES_ENDPOINT, payload: 'job/872324/stages.json' }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('setJobsEndpoint', () => {
+    it('should commit SET_JOBS_ENDPOINT mutation', done => {
+      testAction(
+        setJobsEndpoint,
+        'job/872324/stages/build.json',
+        mockedState,
+        [{ type: types.SET_JOBS_ENDPOINT, payload: 'job/872324/stages/build.json' }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('requestJob', () => {
+    it('should commit REQUEST_JOB mutation', done => {
+      testAction(requestJob, null, mockedState, [{ type: types.REQUEST_JOB }], [], done);
+    });
+  });
+
+  describe('fetchJob', () => {
+    let mock;
+
+    beforeEach(() => {
+      mockedState.jobEndpoint = `${TEST_HOST}/endpoint.json`;
+      mock = new MockAdapter(axios);
+    });
+
+    afterEach(() => {
+      mock.restore();
+      stopPolling();
+      clearEtagPoll();
+    });
+
+    describe('success', () => {
+      it('dispatches requestJob and receiveJobSuccess ', done => {
+        mock.onGet(`${TEST_HOST}/endpoint.json`).replyOnce(200, { id: 121212, name: 'karma' });
+
+        testAction(
+          fetchJob,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'requestJob',
+            },
+            {
+              payload: { id: 121212, name: 'karma' },
+              type: 'receiveJobSuccess',
+            },
+          ],
+          done,
+        );
+      });
+    });
+
+    describe('error', () => {
+      beforeEach(() => {
+        mock.onGet(`${TEST_HOST}/endpoint.json`).reply(500);
+      });
+
+      it('dispatches requestJob and receiveJobError ', done => {
+        testAction(
+          fetchJob,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'requestJob',
+            },
+            {
+              type: 'receiveJobError',
+            },
+          ],
+          done,
+        );
+      });
+    });
+  });
+
+  describe('receiveJobSuccess', () => {
+    it('should commit RECEIVE_JOB_SUCCESS mutation', done => {
+      testAction(
+        receiveJobSuccess,
+        { id: 121232132 },
+        mockedState,
+        [{ type: types.RECEIVE_JOB_SUCCESS, payload: { id: 121232132 } }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('receiveJobError', () => {
+    it('should commit RECEIVE_JOB_ERROR mutation', done => {
+      testAction(receiveJobError, null, mockedState, [{ type: types.RECEIVE_JOB_ERROR }], [], done);
+    });
+  });
+
+  describe('scrollTop', () => {
+    it('should commit SCROLL_TO_TOP mutation', done => {
+      testAction(scrollTop, null, mockedState, [{ type: types.SCROLL_TO_TOP }], [], done);
+    });
+  });
+
+  describe('scrollBottom', () => {
+    it('should commit SCROLL_TO_BOTTOM mutation', done => {
+      testAction(scrollBottom, null, mockedState, [{ type: types.SCROLL_TO_BOTTOM }], [], done);
+    });
+  });
+
+  describe('requestTrace', () => {
+    it('should commit REQUEST_TRACE mutation', done => {
+      testAction(requestTrace, null, mockedState, [{ type: types.REQUEST_TRACE }], [], done);
+    });
+  });
+
+  describe('fetchTrace', () => {
+    let mock;
+
+    beforeEach(() => {
+      mockedState.traceEndpoint = `${TEST_HOST}/endpoint`;
+      mock = new MockAdapter(axios);
+    });
+
+    afterEach(() => {
+      mock.restore();
+      stopPolling();
+      clearEtagPoll();
+    });
+
+    describe('success', () => {
+      it('dispatches requestTrace, fetchFavicon, receiveTraceSuccess and stopPollingTrace when job is complete', done => {
+        mock.onGet(`${TEST_HOST}/endpoint/trace.json`).replyOnce(200, {
+          html: 'I, [2018-08-17T22:57:45.707325 #1841]  INFO -- :',
+          complete: true,
+        });
+
+        testAction(
+          fetchTrace,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'requestTrace',
+            },
+            {
+              type: 'fetchFavicon',
+            },
+            {
+              payload: {
+                html: 'I, [2018-08-17T22:57:45.707325 #1841]  INFO -- :', complete: true,
+              },
+              type: 'receiveTraceSuccess',
+            },
+            {
+              type: 'stopPollingTrace',
+            },
+          ],
+          done,
+        );
+      });
+    });
+
+    describe('error', () => {
+      beforeEach(() => {
+        mock.onGet(`${TEST_HOST}/endpoint/trace.json`).reply(500);
+      });
+
+      it('dispatches requestTrace and receiveTraceError ', done => {
+        testAction(
+          fetchTrace,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'requestTrace',
+            },
+            {
+              type: 'receiveTraceError',
+            },
+          ],
+          done,
+        );
+      });
+    });
+  });
+
+  describe('stopPollingTrace', () => {
+    it('should commit STOP_POLLING_TRACE mutation ', done => {
+      testAction(
+        stopPollingTrace,
+        null,
+        mockedState,
+        [{ type: types.STOP_POLLING_TRACE }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('receiveTraceSuccess', () => {
+    it('should commit RECEIVE_TRACE_SUCCESS mutation ', done => {
+      testAction(
+        receiveTraceSuccess,
+        'hello world',
+        mockedState,
+        [{ type: types.RECEIVE_TRACE_SUCCESS, payload: 'hello world' }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('receiveTraceError', () => {
+    it('should commit RECEIVE_TRACE_ERROR mutation ', done => {
+      testAction(
+        receiveTraceError,
+        null,
+        mockedState,
+        [{ type: types.RECEIVE_TRACE_ERROR }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('fetchFavicon', () => {
+    let mock;
+
+    beforeEach(() => {
+      mockedState.pagePath = `${TEST_HOST}/endpoint`;
+      mock = new MockAdapter(axios);
+    });
+
+    afterEach(() => {
+      mock.restore();
+    });
+
+    describe('success', () => {
+      it('dispatches requestStatusFavicon and receiveStatusFaviconSuccess ', done => {
+        mock.onGet(`${TEST_HOST}/endpoint/status.json`).replyOnce(200);
+
+        testAction(
+          fetchFavicon,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'requestStatusFavicon',
+            },
+            {
+              type: 'receiveStatusFaviconSuccess',
+            },
+          ],
+          done,
+        );
+      });
+    });
+
+    describe('error', () => {
+      beforeEach(() => {
+        mock.onGet(`${TEST_HOST}/endpoint/status.json`).replyOnce(500);
+      });
+
+      it('dispatches requestStatusFavicon and requestStatusFaviconError ', done => {
+        testAction(
+          fetchFavicon,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'requestStatusFavicon',
+            },
+            {
+              type: 'requestStatusFaviconError',
+            },
+          ],
+          done,
+        );
+      });
+    });
+  });
+
+  describe('requestStatusFavicon', () => {
+    it('should commit REQUEST_STATUS_FAVICON mutation ', done => {
+      testAction(
+        requestStatusFavicon,
+        null,
+        mockedState,
+        [{ type: types.REQUEST_STATUS_FAVICON }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('receiveStatusFaviconSuccess', () => {
+    it('should commit RECEIVE_STATUS_FAVICON_SUCCESS mutation ', done => {
+      testAction(
+        receiveStatusFaviconSuccess,
+        null,
+        mockedState,
+        [{ type: types.RECEIVE_STATUS_FAVICON_SUCCESS }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('requestStatusFaviconError', () => {
+    it('should commit RECEIVE_STATUS_FAVICON_ERROR mutation ', done => {
+      testAction(
+        requestStatusFaviconError,
+        null,
+        mockedState,
+        [{ type: types.RECEIVE_STATUS_FAVICON_ERROR }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('requestStages', () => {
+    it('should commit REQUEST_STAGES mutation ', done => {
+      testAction(requestStages, null, mockedState, [{ type: types.REQUEST_STAGES }], [], done);
+    });
+  });
+
+  describe('fetchStages', () => {
+    let mock;
+
+    beforeEach(() => {
+      mockedState.stagesEndpoint = `${TEST_HOST}/endpoint.json`;
+      mock = new MockAdapter(axios);
+    });
+
+    afterEach(() => {
+      mock.restore();
+    });
+
+    describe('success', () => {
+      it('dispatches requestStages and receiveStagesSuccess ', done => {
+        mock.onGet(`${TEST_HOST}/endpoint.json`).replyOnce(200, [{ id: 121212, name: 'build' }]);
+
+        testAction(
+          fetchStages,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'requestStages',
+            },
+            {
+              payload: [{ id: 121212, name: 'build' }],
+              type: 'receiveStagesSuccess',
+            },
+          ],
+          done,
+        );
+      });
+    });
+
+    describe('error', () => {
+      beforeEach(() => {
+        mock.onGet(`${TEST_HOST}/endpoint.json`).reply(500);
+      });
+
+      it('dispatches requestStages and receiveStagesError ', done => {
+        testAction(
+          fetchStages,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'requestStages',
+            },
+            {
+              type: 'receiveStagesError',
+            },
+          ],
+          done,
+        );
+      });
+    });
+  });
+
+  describe('receiveStagesSuccess', () => {
+    it('should commit RECEIVE_STAGES_SUCCESS mutation ', done => {
+      testAction(
+        receiveStagesSuccess,
+        {},
+        mockedState,
+        [{ type: types.RECEIVE_STAGES_SUCCESS, payload: {} }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('receiveStagesError', () => {
+    it('should commit RECEIVE_STAGES_ERROR mutation ', done => {
+      testAction(
+        receiveStagesError,
+        null,
+        mockedState,
+        [{ type: types.RECEIVE_STAGES_ERROR }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('requestJobsForStage', () => {
+    it('should commit REQUEST_JOBS_FOR_STAGE mutation ', done => {
+      testAction(
+        requestJobsForStage,
+        null,
+        mockedState,
+        [{ type: types.REQUEST_JOBS_FOR_STAGE }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('setSelectedStage', () => {
+    it('should commit SET_SELECTED_STAGE mutation ', done => {
+      testAction(
+        setSelectedStage,
+        { name: 'build' },
+        mockedState,
+        [{ type: types.SET_SELECTED_STAGE, payload: { name: 'build' } }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('fetchJobsForStage', () => {
+    let mock;
+
+    beforeEach(() => {
+      mockedState.stageJobsEndpoint = `${TEST_HOST}/endpoint.json`;
+      mock = new MockAdapter(axios);
+    });
+
+    afterEach(() => {
+      mock.restore();
+    });
+
+    describe('success', () => {
+      it('dispatches setSelectedStage, requestJobsForStage and receiveJobsForStageSuccess ', done => {
+        mock.onGet(`${TEST_HOST}/endpoint.json`).replyOnce(200, [{ id: 121212, name: 'build' }]);
+
+        testAction(
+          fetchJobsForStage,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'setSelectedStage',
+              payload: null,
+            },
+            {
+              type: 'requestJobsForStage',
+            },
+            {
+              payload: [{ id: 121212, name: 'build' }],
+              type: 'receiveJobsForStageSuccess',
+            },
+          ],
+          done,
+        );
+      });
+    });
+
+    describe('error', () => {
+      beforeEach(() => {
+        mock.onGet(`${TEST_HOST}/endpoint.json`).reply(500);
+      });
+
+      it('dispatches setSelectedStage, requestJobsForStage and receiveJobsForStageError', done => {
+        testAction(
+          fetchJobsForStage,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              payload: null,
+              type: 'setSelectedStage',
+            },
+            {
+              type: 'requestJobsForStage',
+            },
+            {
+              type: 'receiveJobsForStageError',
+            },
+          ],
+          done,
+        );
+      });
+    });
+  });
+
+  describe('receiveJobsForStageSuccess', () => {
+    it('should commit RECEIVE_JOBS_FOR_STAGE_SUCCESS mutation ', done => {
+      testAction(
+        receiveJobsForStageSuccess,
+        [{ id: 121212, name: 'karma' }],
+        mockedState,
+        [{ type: types.RECEIVE_JOBS_FOR_STAGE_SUCCESS, payload: [{ id: 121212, name: 'karma' }] }],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('receiveJobsForStageError', () => {
+    it('should commit RECEIVE_JOBS_FOR_STAGE_ERROR mutation ', done => {
+      testAction(
+        receiveJobsForStageError,
+        null,
+        mockedState,
+        [{ type: types.RECEIVE_JOBS_FOR_STAGE_ERROR }],
+        [],
+        done,
+      );
+    });
+  });
+});
diff --git a/spec/javascripts/jobs/store/mutations_spec.js b/spec/javascripts/jobs/store/mutations_spec.js
new file mode 100644
index 00000000000..6900b2e5602
--- /dev/null
+++ b/spec/javascripts/jobs/store/mutations_spec.js
@@ -0,0 +1,228 @@
+import state from '~/jobs/store/state';
+import mutations from '~/jobs/store/mutations';
+import * as types from '~/jobs/store/mutation_types';
+
+describe('Jobs Store Mutations', () => {
+  let stateCopy;
+
+  const html =
+    'I, [2018-08-17T22:57:45.707325 #1841]  INFO -- : Writing /builds/ab89e95b0fa0b9272ea0c797b76908f24d36992630e9325273a4ce3.png<br>I';
+
+  beforeEach(() => {
+    stateCopy = state();
+  });
+
+  describe('REQUEST_STATUS_FAVICON', () => {
+    it('should set fetchingStatusFavicon to true', () => {
+      mutations[types.REQUEST_STATUS_FAVICON](stateCopy);
+      expect(stateCopy.fetchingStatusFavicon).toEqual(true);
+    });
+  });
+
+  describe('RECEIVE_STATUS_FAVICON_SUCCESS', () => {
+    it('should set fetchingStatusFavicon to false', () => {
+      mutations[types.RECEIVE_STATUS_FAVICON_SUCCESS](stateCopy);
+      expect(stateCopy.fetchingStatusFavicon).toEqual(false);
+    });
+  });
+
+  describe('RECEIVE_STATUS_FAVICON_ERROR', () => {
+    it('should set fetchingStatusFavicon to false', () => {
+      mutations[types.RECEIVE_STATUS_FAVICON_ERROR](stateCopy);
+      expect(stateCopy.fetchingStatusFavicon).toEqual(false);
+    });
+  });
+
+  describe('RECEIVE_TRACE_SUCCESS', () => {
+    describe('when trace has state', () => {
+      it('sets traceState', () => {
+        const stateLog =
+          'eyJvZmZzZXQiOjczNDQ1MSwibl9vcGVuX3RhZ3MiOjAsImZnX2NvbG9yIjpudWxsLCJiZ19jb2xvciI6bnVsbCwic3R5bGVfbWFzayI6MH0=';
+        mutations[types.RECEIVE_TRACE_SUCCESS](stateCopy, {
+          state: stateLog,
+        });
+        expect(stateCopy.traceState).toEqual(stateLog);
+      });
+    });
+
+    describe('when traceSize is smaller than the total size', () => {
+      it('sets isTraceSizeVisible to true', () => {
+        mutations[types.RECEIVE_TRACE_SUCCESS](stateCopy, { total: 51184600, size: 1231 });
+
+        expect(stateCopy.isTraceSizeVisible).toEqual(true);
+      });
+    });
+
+    describe('when traceSize is bigger than the total size', () => {
+      it('sets isTraceSizeVisible to false', () => {
+        const copy = Object.assign({}, stateCopy, { traceSize: 5118460, size: 2321312 });
+
+        mutations[types.RECEIVE_TRACE_SUCCESS](copy, { total: 511846 });
+
+        expect(copy.isTraceSizeVisible).toEqual(false);
+      });
+    });
+
+    it('sets trace, trace size and isTraceComplete', () => {
+      mutations[types.RECEIVE_TRACE_SUCCESS](stateCopy, {
+        append: true,
+        html,
+        size: 511846,
+        complete: true,
+      });
+      expect(stateCopy.trace).toEqual(html);
+      expect(stateCopy.traceSize).toEqual(511846);
+      expect(stateCopy.isTraceComplete).toEqual(true);
+    });
+  });
+
+  describe('STOP_POLLING_TRACE', () => {
+    it('sets isTraceComplete to true', () => {
+      mutations[types.STOP_POLLING_TRACE](stateCopy);
+      expect(stateCopy.isTraceComplete).toEqual(true);
+    });
+  });
+
+  describe('RECEIVE_TRACE_ERROR', () => {
+    it('resets trace state and sets error to true', () => {
+      mutations[types.RECEIVE_TRACE_ERROR](stateCopy);
+      expect(stateCopy.isLoadingTrace).toEqual(false);
+      expect(stateCopy.isTraceComplete).toEqual(true);
+      expect(stateCopy.hasTraceError).toEqual(true);
+    });
+  });
+
+  describe('REQUEST_JOB', () => {
+    it('sets isLoading to true', () => {
+      mutations[types.REQUEST_JOB](stateCopy);
+
+      expect(stateCopy.isLoading).toEqual(true);
+    });
+  });
+
+  describe('RECEIVE_JOB_SUCCESS', () => {
+    beforeEach(() => {
+      mutations[types.RECEIVE_JOB_SUCCESS](stateCopy, { id: 1312321 });
+    });
+
+    it('sets is loading to false', () => {
+      expect(stateCopy.isLoading).toEqual(false);
+    });
+
+    it('sets hasError to false', () => {
+      expect(stateCopy.hasError).toEqual(false);
+    });
+
+    it('sets job data', () => {
+      expect(stateCopy.job).toEqual({ id: 1312321 });
+    });
+  });
+
+  describe('RECEIVE_JOB_ERROR', () => {
+    it('resets job data', () => {
+      mutations[types.RECEIVE_JOB_ERROR](stateCopy);
+
+      expect(stateCopy.isLoading).toEqual(false);
+      expect(stateCopy.hasError).toEqual(true);
+      expect(stateCopy.job).toEqual({});
+    });
+  });
+
+  describe('SCROLL_TO_TOP', () => {
+    beforeEach(() => {
+      mutations[types.SCROLL_TO_TOP](stateCopy);
+    });
+
+    it('sets isTraceScrolledToBottom to false', () => {
+      expect(stateCopy.isTraceScrolledToBottom).toEqual(false);
+    });
+
+    it('sets hasBeenScrolled to true', () => {
+      expect(stateCopy.hasBeenScrolled).toEqual(true);
+    });
+  });
+
+  describe('SCROLL_TO_BOTTOM', () => {
+    beforeEach(() => {
+      mutations[types.SCROLL_TO_BOTTOM](stateCopy);
+    });
+
+    it('sets isTraceScrolledToBottom to true', () => {
+      expect(stateCopy.isTraceScrolledToBottom).toEqual(true);
+    });
+
+    it('sets hasBeenScrolled to true', () => {
+      expect(stateCopy.hasBeenScrolled).toEqual(true);
+    });
+  });
+
+  describe('REQUEST_STAGES', () => {
+    it('sets isLoadingStages to true', () => {
+      mutations[types.REQUEST_STAGES](stateCopy);
+      expect(stateCopy.isLoadingStages).toEqual(true);
+    });
+  });
+
+  describe('RECEIVE_STAGES_SUCCESS', () => {
+    beforeEach(() => {
+      mutations[types.RECEIVE_STAGES_SUCCESS](stateCopy, [{ name: 'build' }]);
+    });
+
+    it('sets isLoadingStages to false', () => {
+      expect(stateCopy.isLoadingStages).toEqual(false);
+    });
+
+    it('sets stages', () => {
+      expect(stateCopy.stages).toEqual([{ name: 'build' }]);
+    });
+  });
+
+  describe('RECEIVE_STAGES_ERROR', () => {
+    beforeEach(() => {
+      mutations[types.RECEIVE_STAGES_ERROR](stateCopy);
+    });
+
+    it('sets isLoadingStages to false', () => {
+      expect(stateCopy.isLoadingStages).toEqual(false);
+    });
+
+    it('resets stages', () => {
+      expect(stateCopy.stages).toEqual([]);
+    });
+  });
+
+  describe('REQUEST_JOBS_FOR_STAGE', () => {
+    it('sets isLoadingStages to true', () => {
+      mutations[types.REQUEST_JOBS_FOR_STAGE](stateCopy);
+      expect(stateCopy.isLoadingJobs).toEqual(true);
+    });
+  });
+
+  describe('RECEIVE_JOBS_FOR_STAGE_SUCCESS', () => {
+    beforeEach(() => {
+      mutations[types.RECEIVE_JOBS_FOR_STAGE_SUCCESS](stateCopy, [{ name: 'karma' }]);
+    });
+
+    it('sets isLoadingJobs to false', () => {
+      expect(stateCopy.isLoadingJobs).toEqual(false);
+    });
+
+    it('sets jobs', () => {
+      expect(stateCopy.jobs).toEqual([{ name: 'karma' }]);
+    });
+  });
+
+  describe('RECEIVE_JOBS_FOR_STAGE_ERROR', () => {
+    beforeEach(() => {
+      mutations[types.RECEIVE_JOBS_FOR_STAGE_ERROR](stateCopy);
+    });
+
+    it('sets isLoadingJobs to false', () => {
+      expect(stateCopy.isLoadingJobs).toEqual(false);
+    });
+
+    it('resets jobs', () => {
+      expect(stateCopy.jobs).toEqual([]);
+    });
+  });
+});
diff --git a/spec/javascripts/lib/utils/common_utils_spec.js b/spec/javascripts/lib/utils/common_utils_spec.js
index 71b26a315af..babad296f09 100644
--- a/spec/javascripts/lib/utils/common_utils_spec.js
+++ b/spec/javascripts/lib/utils/common_utils_spec.js
@@ -403,6 +403,7 @@ describe('common_utils', () => {
     afterEach(() => {
       document.body.removeChild(document.getElementById('favicon'));
     });
+
     it('should set page favicon to provided favicon', () => {
       const faviconPath = '//custom_favicon';
       commonUtils.setFavicon(faviconPath);
@@ -479,17 +480,14 @@ describe('common_utils', () => {
     });
 
     it('should reset favicon in case of error', (done) => {
-      mock.onGet(BUILD_URL).networkError();
+      mock.onGet(BUILD_URL).replyOnce(500);
 
       commonUtils.setCiStatusFavicon(BUILD_URL)
-        .then(() => {
+        .catch(() => {
           const favicon = document.getElementById('favicon');
           expect(favicon.getAttribute('href')).toEqual(faviconDataUrl);
           done();
-        })
-        // Error is already caught in catch() block of setCiStatusFavicon,
-        // It won't throw another error for us to catch
-        .catch(done.fail);
+        });
     });
 
     it('should set page favicon to CI status favicon based on provided status', (done) => {