Fix IDE pipelines eTagPoll not stopping

Closes #47678

app/assets/javascripts/ide/stores/modules/merge_requests/actions.js

@@ -31,10 +31,15 @@ export const openMergeRequest = ({ commit, dispatch }, { projectPath, id }) => {
   commit(rootTypes.CLEAR_PROJECTS, null, { root: true });
   commit(rootTypes.SET_CURRENT_MERGE_REQUEST, `${id}`, { root: true });
   commit(rootTypes.RESET_OPEN_FILES, null, { root: true });
-  dispatch('pipelines/stopPipelinePolling', null, { root: true });
-  dispatch('pipelines/clearEtagPoll', null, { root: true });
   dispatch('pipelines/resetLatestPipeline', null, { root: true });
   dispatch('setCurrentBranchId', '', { root: true });
+  dispatch('pipelines/stopPipelinePolling', null, { root: true })
+    .then(() => {
+      dispatch('pipelines/clearEtagPoll', null, { root: true });
+    })
+    .catch(e => {
+      throw e;
+    });
 
   router.push(`/project/${projectPath}/merge_requests/${id}`);
 };

app/assets/javascripts/ide/stores/modules/pipelines/actions.js

@@ -12,8 +12,12 @@ let eTagPoll;
 export const clearEtagPoll = () => {
   eTagPoll = null;
 };
-export const stopPipelinePolling = () => eTagPoll && eTagPoll.stop();
-export const restartPipelinePolling = () => eTagPoll && eTagPoll.restart();
+export const stopPipelinePolling = () => {
+  if (eTagPoll) eTagPoll.stop();
+};
+export const restartPipelinePolling = () => {
+  if (eTagPoll) eTagPoll.restart();
+};
 
 export const requestLatestPipeline = ({ commit }) => commit(types.REQUEST_LATEST_PIPELINE);
 export const receiveLatestPipelineError = ({ commit, dispatch }) => {
@@ -51,9 +55,9 @@ export const fetchLatestPipeline = ({ dispatch, rootGetters }) => {
 
   Visibility.change(() => {
     if (!Visibility.hidden()) {
-      eTagPoll.restart();
+      dispatch('restartPipelinePolling');
     } else {
-      eTagPoll.stop();
+      dispatch('stopPipelinePolling');
     }
   });
 };

spec/javascripts/ide/components/pipelines/list_spec.js

@@ -45,12 +45,15 @@ describe('IDE pipelines list', () => {
     setTimeout(done);
   });
 
-  afterEach(() => {
-    vm.$store.dispatch('pipelines/stopPipelinePolling');
-    vm.$store.dispatch('pipelines/clearEtagPoll');
-
+  afterEach(done => {
     vm.$destroy();
     mock.restore();
+
+    vm.$store
+      .dispatch('pipelines/stopPipelinePolling')
+      .then(() => vm.$store.dispatch('pipelines/clearEtagPoll'))
+      .then(done)
+      .catch(done.fail);
   });
 
   it('renders pipeline data', () => {