Updated heading for default state in Web IDE

Resolves https://gitlab.com/gitlab-org/gitlab-ce/issues/60107

app/assets/javascripts/ide/components/ide.vue

 <script>
 import Vue from 'vue';
 import { mapActions, mapState, mapGetters } from 'vuex';
+import { GlButton, GlLoadingIcon } from '@gitlab/ui';
 import { __ } from '~/locale';
 import FindFile from '~/vue_shared/components/file_finder/index.vue';
 import NewModal from './new_dropdown/modal.vue';
@@ -22,6 +23,8 @@ export default {
     FindFile,
     ErrorMessage,
     CommitEditorHeader,
+    GlButton,
+    GlLoadingIcon,
   },
   props: {
     rightPaneComponent: {
@@ -47,13 +50,15 @@ export default {
       'someUncommittedChanges',
       'isCommitModeActive',
       'allBlobs',
+      'emptyRepo',
+      'currentTree',
     ]),
   },
   mounted() {
     window.onbeforeunload = e => this.onBeforeUnload(e);
   },
   methods: {
-    ...mapActions(['toggleFileFinder']),
+    ...mapActions(['toggleFileFinder', 'openNewEntryModal']),
     onBeforeUnload(e = {}) {
       const returnValue = __('Are you sure you want to lose unsaved changes?');
@@ -98,17 +103,40 @@ export default {
           <repo-editor :file="activeFile" class="multi-file-edit-pane-content" />
         </template>
         <template v-else>
-          <div v-once class="ide-empty-state">
+          <div class="ide-empty-state">
             <div class="row js-empty-state">
               <div class="col-12">
                 <div class="svg-content svg-250"><img :src="emptyStateSvgPath" /></div>
               </div>
               <div class="col-12">
                 <div class="text-content text-center">
-                  <h4>Welcome to the GitLab IDE</h4>
-                  <p>
-                    Select a file from the left sidebar to begin editing. Afterwards, you'll be able
-                    to commit your changes.
+                  <h4>
+                    {{ __('Make and review changes in the browser with the Web IDE') }}
+                  </h4>
+                  <template v-if="emptyRepo">
+                    <p>
+                      {{
+                        __(
+                          "Create a new file as there are no files yet. Afterwards, you'll be able to commit your changes.",
+                        )
+                      }}
+                    </p>
+                    <gl-button
+                      variant="success"
+                      :title="__('New file')"
+                      :aria-label="__('New file')"
+                      @click="openNewEntryModal({ type: 'blob' })"
+                    >
+                      {{ __('New file') }}
+                    </gl-button>
+                  </template>
+                  <gl-loading-icon v-else-if="!currentTree || currentTree.loading" size="md" />
+                  <p v-else>
+                    {{
+                      __(
+                        "Select a file from the left sidebar to begin editing. Afterwards, you'll be able to commit your changes.",
+                      )
+                    }}
                   </p>
                 </div>
               </div>

app/assets/javascripts/ide/components/ide_tree_list.vue

@@ -54,14 +54,17 @@ export default {
         <slot name="header"></slot>
       </header>
       <div class="ide-tree-body h-100">
-        <file-row
-          v-for="file in currentTree.tree"
-          :key="file.key"
-          :file="file"
-          :level="0"
-          :extra-component="$options.FileRowExtra"
-          @toggleTreeOpen="toggleTreeOpen"
-        />
+        <template v-if="currentTree.tree.length">
+          <file-row
+            v-for="file in currentTree.tree"
+            :key="file.key"
+            :file="file"
+            :level="0"
+            :extra-component="$options.FileRowExtra"
+            @toggleTreeOpen="toggleTreeOpen"
+          />
+        </template>
+        <div v-else class="file-row">{{ __('No files') }}</div>
       </div>
     </template>
   </div>

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

 import $ from 'jquery';
 import Vue from 'vue';
+import { __, sprintf } from '~/locale';
 import { visitUrl } from '~/lib/utils/url_utility';
 import flash from '~/flash';
+import _ from 'underscore';
 import * as types from './mutation_types';
 import { decorateFiles } from '../lib/files';
 import { stageKeys } from '../constants';
-export const redirectToUrl = (_, url) => visitUrl(url);
+import service from '../services';
+export const redirectToUrl = (self, url) => visitUrl(url);
 export const setInitialData = ({ commit }, data) => commit(types.SET_INITIAL_DATA, data);
@@ -239,6 +242,53 @@ export const renameEntry = (
   }
 };
+export const getBranchData = ({ commit, state }, { projectId, branchId, force = false } = {}) =>
+  new Promise((resolve, reject) => {
+    const currentProject = state.projects[projectId];
+    if (!currentProject || !currentProject.branches[branchId] || force) {
+      service
+        .getBranchData(projectId, branchId)
+        .then(({ data }) => {
+          const { id } = data.commit;
+          commit(types.SET_BRANCH, {
+            projectPath: projectId,
+            branchName: branchId,
+            branch: data,
+          });
+          commit(types.SET_BRANCH_WORKING_REFERENCE, { projectId, branchId, reference: id });
+          resolve(data);
+        })
+        .catch(e => {
+          if (e.response.status === 404) {
+            reject(e);
+          } else {
+            flash(
+              __('Error loading branch data. Please try again.'),
+              'alert',
+              document,
+              null,
+              false,
+              true,
+            );
+
+            reject(
+              new Error(
+                sprintf(
+                  __('Branch not loaded - %{branchId}'),
+                  {
+                    branchId: `<strong>${_.escape(projectId)}/${_.escape(branchId)}</strong>`,
+                  },
+                  false,
+                ),
+              ),
+            );
+          }
+        });
+    } else {
+      resolve(currentProject.branches[branchId]);
+    }
+  });
+
 export * from './actions/tree';
 export * from './actions/file';
 export * from './actions/project';

app/assets/javascripts/ide/stores/actions/project.js

@@ -35,48 +35,6 @@ export const getProjectData = ({ commit, state }, { namespace, projectId, force
     }
   });
-export const getBranchData = (
-  { commit, dispatch, state },
-  { projectId, branchId, force = false } = {},
-) =>
-  new Promise((resolve, reject) => {
-    if (
-      typeof state.projects[`${projectId}`] === 'undefined' ||
-      !state.projects[`${projectId}`].branches[branchId] ||
-      force
-    ) {
-      service
-        .getBranchData(`${projectId}`, branchId)
-        .then(({ data }) => {
-          const { id } = data.commit;
-          commit(types.SET_BRANCH, {
-            projectPath: `${projectId}`,
-            branchName: branchId,
-            branch: data,
-          });
-          commit(types.SET_BRANCH_WORKING_REFERENCE, { projectId, branchId, reference: id });
-          resolve(data);
-        })
-        .catch(e => {
-          if (e.response.status === 404) {
-            dispatch('showBranchNotFoundError', branchId);
-          } else {
-            flash(
-              __('Error loading branch data. Please try again.'),
-              'alert',
-              document,
-              null,
-              false,
-              true,
-            );
-          }
-          reject(new Error(`Branch not loaded - ${projectId}/${branchId}`));
-        });
-    } else {
-      resolve(state.projects[`${projectId}`].branches[branchId]);
-    }
-  });
-
 export const refreshLastCommitData = ({ commit }, { projectId, branchId } = {}) =>
   service
     .getBranchData(projectId, branchId)
@@ -125,40 +83,66 @@ export const showBranchNotFoundError = ({ dispatch }, branchId) => {
   });
 };
-export const openBranch = ({ dispatch, state }, { projectId, branchId, basePath }) => {
-  dispatch('setCurrentBranchId', branchId);
-
-  dispatch('getBranchData', {
-    projectId,
-    branchId,
+export const showEmptyState = ({ commit, state }, { projectId, branchId }) => {
+  const treePath = `${projectId}/${branchId}`;
+  commit(types.CREATE_TREE, { treePath });
+  commit(types.TOGGLE_LOADING, {
+    entry: state.trees[treePath],
+    forceValue: false,
   });
-  return dispatch('getFiles', {
+};
+export const openBranch = ({ dispatch, state, getters }, { projectId, branchId, basePath }) => {
+  dispatch('setCurrentBranchId', branchId);
+
+  if (getters.emptyRepo) {
+    return dispatch('showEmptyState', { projectId, branchId });
+  }
+  return dispatch('getBranchData', {
     projectId,
     branchId,
   })
-    .then(() => {
-      if (basePath) {
-        const path = basePath.slice(-1) === '/' ? basePath.slice(0, -1) : basePath;
-        const treeEntryKey = Object.keys(state.entries).find(
-          key => key === path && !state.entries[key].pending,
-        );
-        const treeEntry = state.entries[treeEntryKey];
-
-        if (treeEntry) {
-          dispatch('handleTreeEntryAction', treeEntry);
-        } else {
-          dispatch('createTempEntry', {
-            name: path,
-            type: 'blob',
-          });
-        }
-      }
-    })
     .then(() => {
       dispatch('getMergeRequestsForBranch', {
         projectId,
         branchId,
       });
+      dispatch('getFiles', {
+        projectId,
+        branchId,
+      })
+        .then(() => {
+          if (basePath) {
+            const path = basePath.slice(-1) === '/' ? basePath.slice(0, -1) : basePath;
+            const treeEntryKey = Object.keys(state.entries).find(
+              key => key === path && !state.entries[key].pending,
+            );
+            const treeEntry = state.entries[treeEntryKey];
+
+            if (treeEntry) {
+              dispatch('handleTreeEntryAction', treeEntry);
+            } else {
+              dispatch('createTempEntry', {
+                name: path,
+                type: 'blob',
+              });
+            }
+          }
+        })
+        .catch(
+          () =>
+            new Error(
+              sprintf(
+                __('An error occurred whilst getting files for - %{branchId}'),
+                {
+                  branchId: `<strong>${_.escape(projectId)}/${_.escape(branchId)}</strong>`,
+                },
+                false,
+              ),
+            ),
+        );
+    })
+    .catch(() => {
+      dispatch('showBranchNotFoundError', branchId);
     });
 };

app/assets/javascripts/ide/stores/actions/tree.js

@@ -74,17 +74,13 @@ export const getFiles = ({ state, commit, dispatch }, { projectId, branchId } =
           resolve();
         })
         .catch(e => {
-          if (e.response.status === 404) {
-            dispatch('showBranchNotFoundError', branchId);
-          } else {
-            dispatch('setErrorMessage', {
-              text: __('An error occurred whilst loading all the files.'),
-              action: payload =>
-                dispatch('getFiles', payload).then(() => dispatch('setErrorMessage', null)),
-              actionText: __('Please try again'),
-              actionPayload: { projectId, branchId },
-            });
-          }
+          dispatch('setErrorMessage', {
+            text: __('An error occurred whilst loading all the files.'),
+            action: payload =>
+              dispatch('getFiles', payload).then(() => dispatch('setErrorMessage', null)),
+            actionText: __('Please try again'),
+            actionPayload: { projectId, branchId },
+          });
           reject(e);
         });
     } else {

app/assets/javascripts/ide/stores/getters.js

@@ -36,6 +36,9 @@ export const currentMergeRequest = state => {
 export const currentProject = state => state.projects[state.currentProjectId];
+export const emptyRepo = state =>
+  state.projects[state.currentProjectId] && state.projects[state.currentProjectId].empty_repo;
+
 export const currentTree = state =>
   state.trees[`${state.currentProjectId}/${state.currentBranchId}`];

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

@@ -135,6 +135,17 @@ export const commitChanges = ({ commit, state, getters, dispatch, rootState, roo
         return null;
       }
+      if (!data.parent_ids.length) {
+        commit(
+          rootTypes.TOGGLE_EMPTY_STATE,
+          {
+            projectPath: rootState.currentProjectId,
+            value: false,
+          },
+          { root: true },
+        );
+      }
+
       dispatch('setLastCommitMessage', data);
       dispatch('updateCommitMessage', '');
       return dispatch('updateFilesAfterCommit', {

app/assets/javascripts/ide/stores/mutation_types.js

@@ -12,6 +12,7 @@ export const SET_LINKS = 'SET_LINKS';
 export const SET_PROJECT = 'SET_PROJECT';
 export const SET_CURRENT_PROJECT = 'SET_CURRENT_PROJECT';
 export const TOGGLE_PROJECT_OPEN = 'TOGGLE_PROJECT_OPEN';
+export const TOGGLE_EMPTY_STATE = 'TOGGLE_EMPTY_STATE';
 // Merge Request Mutation Types
 export const SET_MERGE_REQUEST = 'SET_MERGE_REQUEST';

app/assets/javascripts/ide/stores/mutations/branch.js

@@ -19,6 +19,12 @@ export default {
     });
   },
   [types.SET_BRANCH_WORKING_REFERENCE](state, { projectId, branchId, reference }) {
+    if (!state.projects[projectId].branches[branchId]) {
+      Object.assign(state.projects[projectId].branches, {
+        [branchId]: {},
+      });
+    }
+
     Object.assign(state.projects[projectId].branches[branchId], {
       workingReference: reference,
     });

app/assets/javascripts/ide/stores/mutations/project.js

@@ -21,4 +21,9 @@ export default {
       }),
     });
   },
+  [types.TOGGLE_EMPTY_STATE](state, { projectPath, value }) {
+    Object.assign(state.projects[projectPath], {
+      empty_repo: value,
+    });
+  },
 };

changelogs/unreleased/45687-web-ide-empty-state.yml

+---
+title: Empty project state for Web IDE
+merge_request: 26556
+author:
+type: added

lib/api/entities.rb

@@ -239,6 +239,7 @@ module API
         end
       end
+      expose :empty_repo?, as: :empty_repo
       expose :archived?, as: :archived
       expose :visibility
       expose :owner, using: Entities::UserBasic, unless: ->(project, options) { project.group }

locale/gitlab.pot

@@ -952,6 +952,9 @@ msgstr ""
 msgid "An error occurred whilst fetching the latest pipeline."
 msgstr ""
+msgid "An error occurred whilst getting files for - %{branchId}"
+msgstr ""
+
 msgid "An error occurred whilst loading all the files."
 msgstr ""
@@ -1482,6 +1485,9 @@ msgstr ""
 msgid "Branch name"
 msgstr ""
+msgid "Branch not loaded - %{branchId}"
+msgstr ""
+
 msgid "BranchSwitcherPlaceholder|Search branches"
 msgstr ""
@@ -2993,6 +2999,9 @@ msgstr ""
 msgid "Create a new branch"
 msgstr ""
+msgid "Create a new file as there are no files yet. Afterwards, you'll be able to commit your changes."
+msgstr ""
+
 msgid "Create a new issue"
 msgstr ""
@@ -5796,6 +5805,9 @@ msgstr ""
 msgid "MRDiff|Show full file"
 msgstr ""
+msgid "Make and review changes in the browser with the Web IDE"
+msgstr ""
+
 msgid "Make issue confidential."
 msgstr ""
@@ -6452,6 +6464,9 @@ msgstr ""
 msgid "No file selected"
 msgstr ""
+msgid "No files"
+msgstr ""
+
 msgid "No files found."
 msgstr ""
@@ -8615,6 +8630,9 @@ msgstr ""
 msgid "Select Archive Format"
 msgstr ""
+msgid "Select a file from the left sidebar to begin editing. Afterwards, you'll be able to commit your changes."
+msgstr ""
+
 msgid "Select a group to invite"
 msgstr ""

spec/frontend/ide/stores/mutations/branch_spec.js

@@ -37,4 +37,39 @@ describe('Multi-file store branch mutations', () => {
       expect(localState.projects.Example.branches.master.commit.title).toBe('Example commit');
     });
   });
+
+  describe('SET_BRANCH_WORKING_REFERENCE', () => {
+    beforeEach(() => {
+      localState.projects = {
+        Foo: {
+          branches: {
+            bar: {},
+          },
+        },
+      };
+    });
+
+    it('sets workingReference for existing branch', () => {
+      mutations.SET_BRANCH_WORKING_REFERENCE(localState, {
+        projectId: 'Foo',
+        branchId: 'bar',
+        reference: 'foo-bar-ref',
+      });
+
+      expect(localState.projects.Foo.branches.bar.workingReference).toBe('foo-bar-ref');
+    });
+
+    it('does not fail on non-existent just yet branch', () => {
+      expect(localState.projects.Foo.branches.unknown).toBeUndefined();
+
+      mutations.SET_BRANCH_WORKING_REFERENCE(localState, {
+        projectId: 'Foo',
+        branchId: 'unknown',
+        reference: 'fun-fun-ref',
+      });
+
+      expect(localState.projects.Foo.branches.unknown).not.toBeUndefined();
+      expect(localState.projects.Foo.branches.unknown.workingReference).toBe('fun-fun-ref');
+    });
+  });
 });

spec/frontend/ide/stores/mutations/project_spec.js

+import mutations from '~/ide/stores/mutations/project';
+import state from '~/ide/stores/state';
+
+describe('Multi-file store branch mutations', () => {
+  let localState;
+
+  beforeEach(() => {
+    localState = state();
+    localState.projects = { abcproject: { empty_repo: true } };
+  });
+
+  describe('TOGGLE_EMPTY_STATE', () => {
+    it('sets empty_repo for project to passed value', () => {
+      mutations.TOGGLE_EMPTY_STATE(localState, { projectPath: 'abcproject', value: false });
+
+      expect(localState.projects.abcproject.empty_repo).toBe(false);
+
+      mutations.TOGGLE_EMPTY_STATE(localState, { projectPath: 'abcproject', value: true });
+
+      expect(localState.projects.abcproject.empty_repo).toBe(true);
+    });
+  });
+});

spec/javascripts/ide/components/ide_spec.js

@@ -5,21 +5,53 @@ import { createComponentWithStore } from 'spec/helpers/vue_mount_component_helpe
 import { file, resetStore } from '../helpers';
 import { projectData } from '../mock_data';
-describe('ide component', () => {
+function bootstrap(projData) {
+  const Component = Vue.extend(ide);
+
+  store.state.currentProjectId = 'abcproject';
+  store.state.currentBranchId = 'master';
+  store.state.projects.abcproject = Object.assign({}, projData);
+  Vue.set(store.state.trees, 'abcproject/master', {
+    tree: [],
+    loading: false,
+  });
+
+  return createComponentWithStore(Component, store, {
+    emptyStateSvgPath: 'svg',
+    noChangesStateSvgPath: 'svg',
+    committedStateSvgPath: 'svg',
+  });
+}
+
+describe('ide component, empty repo', () => {
   let vm;
   beforeEach(() => {
-    const Component = Vue.extend(ide);
-    store.state.currentProjectId = 'abcproject';
-    store.state.currentBranchId = 'master';
-    store.state.projects.abcproject = Object.assign({}, projectData);
-    vm = createComponentWithStore(Component, store, {
-      emptyStateSvgPath: 'svg',
-      noChangesStateSvgPath: 'svg',
-      committedStateSvgPath: 'svg',
-    }).$mount();
+    const emptyProjData = Object.assign({}, projectData, { empty_repo: true, branches: {} });
+    vm = bootstrap(emptyProjData);
+    vm.$mount();
+  });
+  afterEach(() => {
+    vm.$destroy();
+
+    resetStore(vm.$store);
+  });
+  it('renders "New file" button in empty repo', done => {
+    vm.$nextTick(() => {
+      expect(vm.$el.querySelector('.ide-empty-state button[title="New file"]')).not.toBeNull();
+      done();
+    });
+  });
+});
+
+describe('ide component, non-empty repo', () => {
+  let vm;
+
+  beforeEach(() => {
+    vm = bootstrap(projectData);
+    vm.$mount();
   });
   afterEach(() => {
@@ -28,17 +60,15 @@ describe('ide component', () => {
     resetStore(vm.$store);
   });
-  it('does not render right when no files open', () => {
-    expect(vm.$el.querySelector('.panel-right')).toBeNull();
-  });
-  it('renders right panel when files are open', done => {
-    vm.$store.state.trees['abcproject/mybranch'] = {
-      tree: [file()],
+  it('shows error message when set', done => {
+    expect(vm.$el.querySelector('.flash-container')).toBe(null);
+    vm.$store.state.errorMessage = {
+      text: 'error',
     };
-    Vue.nextTick(() => {
-      expect(vm.$el.querySelector('.panel-right')).toBeNull();
+    vm.$nextTick(() => {
+      expect(vm.$el.querySelector('.flash-container')).not.toBe(null);
       done();
     });
@@ -71,17 +101,25 @@ describe('ide component', () => {
     });
   });
-  it('shows error message when set', done => {
-    expect(vm.$el.querySelector('.flash-container')).toBe(null);
-
-    vm.$store.state.errorMessage = {
-      text: 'error',
-    };
-    vm.$nextTick(() => {
-      expect(vm.$el.querySelector('.flash-container')).not.toBe(null);
-      done();
+  describe('non-existent branch', () => {
+    it('does not render "New file" button for non-existent branch when repo is not empty', done => {
+      vm.$nextTick(() => {
+        expect(vm.$el.querySelector('.ide-empty-state button[title="New file"]')).toBeNull();
+        done();
+      });
+    });
+  });
+  describe('branch with files', () => {
+    beforeEach(() => {
+      store.state.trees['abcproject/master'].tree = [file()];
+    });
+    it('does not render "New file" button', done => {
+      vm.$nextTick(() => {
+        expect(vm.$el.querySelector('.ide-empty-state button[title="New file"]')).toBeNull();
+        done();
+      });
     });
   });
 });

spec/javascripts/ide/components/ide_tree_list_spec.js

@@ -7,25 +7,23 @@ import { projectData } from '../mock_data';
 describe('IDE tree list', () => {
   const Component = Vue.extend(IdeTreeList);
+  const normalBranchTree = [file('fileName')];
+  const emptyBranchTree = [];
   let vm;
-  beforeEach(() => {
+  const bootstrapWithTree = (tree = normalBranchTree) => {
     store.state.currentProjectId = 'abcproject';
     store.state.currentBranchId = 'master';
     store.state.projects.abcproject = Object.assign({}, projectData);
     Vue.set(store.state.trees, 'abcproject/master', {
-      tree: [file('fileName')],
+      tree,
       loading: false,
     });
     vm = createComponentWithStore(Component, store, {
       viewerType: 'edit',
     });
-
-    spyOn(vm, 'updateViewer').and.callThrough();
-
-    vm.$mount();
-  });
+  };
   afterEach(() => {
     vm.$destroy();
@@ -33,22 +31,47 @@ describe('IDE tree list', () => {
     resetStore(vm.$store);
   });
-  it('updates viewer on mount', () => {
-    expect(vm.updateViewer).toHaveBeenCalledWith('edit');
-  });
-  it('renders loading indicator', done => {
-    store.state.trees['abcproject/master'].loading = true;
-    vm.$nextTick(() => {
-      expect(vm.$el.querySelector('.multi-file-loading-container')).not.toBeNull();
-      expect(vm.$el.querySelectorAll('.multi-file-loading-container').length).toBe(3);
-      done();
+  describe('normal branch', () => {
+    beforeEach(() => {
+      bootstrapWithTree();
+
+      spyOn(vm, 'updateViewer').and.callThrough();
+
+      vm.$mount();
+    });
+
+    it('updates viewer on mount', () => {
+      expect(vm.updateViewer).toHaveBeenCalledWith('edit');
+    });
+
+    it('renders loading indicator', done => {
+      store.state.trees['abcproject/master'].loading = true;
+      vm.$nextTick(() => {
+        expect(vm.$el.querySelector('.multi-file-loading-container')).not.toBeNull();
+        expect(vm.$el.querySelectorAll('.multi-file-loading-container').length).toBe(3);
+        done();
+      });
+    });
+    it('renders list of files', () => {
+      expect(vm.$el.textContent).toContain('fileName');
     });
   });
-  it('renders list of files', () => {
-    expect(vm.$el.textContent).toContain('fileName');
+  describe('empty-branch state', () => {
+    beforeEach(() => {
+      bootstrapWithTree(emptyBranchTree);
+
+      spyOn(vm, 'updateViewer').and.callThrough();
+
+      vm.$mount();
+    });
+
+    it('does not load files if the branch is empty', () => {
+      expect(vm.$el.textContent).not.toContain('fileName');
+      expect(vm.$el.textContent).toContain('No files');
+    });
   });
 });

spec/javascripts/ide/stores/actions/project_spec.js

@@ -4,7 +4,7 @@ import {
   refreshLastCommitData,
   showBranchNotFoundError,
   createNewBranchFromDefault,
-  getBranchData,
+  showEmptyState,
   openBranch,
 } from '~/ide/stores/actions';
 import store from '~/ide/stores';
@@ -196,39 +196,44 @@ describe('IDE store project actions', () => {
     });
   });
-  describe('getBranchData', () => {
-    describe('error', () => {
-      it('dispatches branch not found action when response is 404', done => {
-        const dispatch = jasmine.createSpy('dispatchSpy');
-
-        mock.onGet(/(.*)/).replyOnce(404);
-
-        getBranchData(
+  describe('showEmptyState', () => {
+    it('commits proper mutations when supplied error is 404', done => {
+      testAction(
+        showEmptyState,
+        {
+          err: {
+            response: {
+              status: 404,
+            },
+          },
+          projectId: 'abc/def',
+          branchId: 'master',
+        },
+        store.state,
+        [
           {
-            commit() {},
-            dispatch,
-            state: store.state,
+            type: 'CREATE_TREE',
+            payload: {
+              treePath: 'abc/def/master',
+            },
           },
           {
-            projectId: 'abc/def',
-            branchId: 'master-testing',
+            type: 'TOGGLE_LOADING',
+            payload: {
+              entry: store.state.trees['abc/def/master'],
+              forceValue: false,
+            },
           },
-        )
-          .then(done.fail)
-          .catch(() => {
-            expect(dispatch.calls.argsFor(0)).toEqual([
-              'showBranchNotFoundError',
-              'master-testing',
-            ]);
-            done();
-          });
-      });
+        ],
+        [],
+        done,
+      );
     });
   });
   describe('openBranch', () => {
     const branch = {
-      projectId: 'feature/lorem-ipsum',
+      projectId: 'abc/def',
       branchId: '123-lorem',
     };
@@ -238,63 +243,113 @@ describe('IDE store project actions', () => {
         'foo/bar-pending': { pending: true },
         'foo/bar': { pending: false },
       };
-
-      spyOn(store, 'dispatch').and.returnValue(Promise.resolve());
     });
-    it('dispatches branch actions', done => {
-      openBranch(store, branch)
-        .then(() => {
-          expect(store.dispatch.calls.allArgs()).toEqual([
-            ['setCurrentBranchId', branch.branchId],
-            ['getBranchData', branch],
-            ['getFiles', branch],
-            ['getMergeRequestsForBranch', branch],
-          ]);
-        })
-        .then(done)
-        .catch(done.fail);
-    });
-    it('handles tree entry action, if basePath is given', done => {
-      openBranch(store, { ...branch, basePath: 'foo/bar/' })
-        .then(() => {
-          expect(store.dispatch).toHaveBeenCalledWith(
-            'handleTreeEntryAction',
-            store.state.entries['foo/bar'],
-          );
-        })
-        .then(done)
-        .catch(done.fail);
+    describe('empty repo', () => {
+      beforeEach(() => {
+        spyOn(store, 'dispatch').and.returnValue(Promise.resolve());
+        store.state.currentProjectId = 'abc/def';
+        store.state.projects['abc/def'] = {
+          empty_repo: true,
+        };
+      });
+
+      afterEach(() => {
+        resetStore(store);
+      });
+
+      it('dispatches showEmptyState action right away', done => {
+        openBranch(store, branch)
+          .then(() => {
+            expect(store.dispatch.calls.allArgs()).toEqual([
+              ['setCurrentBranchId', branch.branchId],
+              ['showEmptyState', branch],
+            ]);
+            done();
+          })
+          .catch(done.fail);
+      });
     });
-    it('does not handle tree entry action, if entry is pending', done => {
-      openBranch(store, { ...branch, basePath: 'foo/bar-pending' })
-        .then(() => {
-          expect(store.dispatch).not.toHaveBeenCalledWith(
-            'handleTreeEntryAction',
-            jasmine.anything(),
-          );
-        })
-        .then(done)
-        .catch(done.fail);
+    describe('existing branch', () => {
+      beforeEach(() => {
+        spyOn(store, 'dispatch').and.returnValue(Promise.resolve());
+      });
+
+      it('dispatches branch actions', done => {
+        openBranch(store, branch)
+          .then(() => {
+            expect(store.dispatch.calls.allArgs()).toEqual([
+              ['setCurrentBranchId', branch.branchId],
+              ['getBranchData', branch],
+              ['getMergeRequestsForBranch', branch],
+              ['getFiles', branch],
+            ]);
+          })
+          .then(done)
+          .catch(done.fail);
+      });
+
+      it('handles tree entry action, if basePath is given', done => {
+        openBranch(store, { ...branch, basePath: 'foo/bar/' })
+          .then(() => {
+            expect(store.dispatch).toHaveBeenCalledWith(
+              'handleTreeEntryAction',
+              store.state.entries['foo/bar'],
+            );
+          })
+          .then(done)
+          .catch(done.fail);
+      });
+
+      it('does not handle tree entry action, if entry is pending', done => {
+        openBranch(store, { ...branch, basePath: 'foo/bar-pending' })
+          .then(() => {
+            expect(store.dispatch).not.toHaveBeenCalledWith(
+              'handleTreeEntryAction',
+              jasmine.anything(),
+            );
+          })
+          .then(done)
+          .catch(done.fail);
+      });
+
+      it('creates a new file supplied via URL if the file does not exist yet', done => {
+        openBranch(store, { ...branch, basePath: 'not-existent.md' })
+          .then(() => {
+            expect(store.dispatch).not.toHaveBeenCalledWith(
+              'handleTreeEntryAction',
+              jasmine.anything(),
+            );
+
+            expect(store.dispatch).toHaveBeenCalledWith('createTempEntry', {
+              name: 'not-existent.md',
+              type: 'blob',
+            });
+          })
+          .then(done)
+          .catch(done.fail);
+      });
     });
-    it('creates a new file supplied via URL if the file does not exist yet', done => {
-      openBranch(store, { ...branch, basePath: 'not-existent.md' })
-        .then(() => {
-          expect(store.dispatch).not.toHaveBeenCalledWith(
-            'handleTreeEntryAction',
-            jasmine.anything(),
-          );
-          expect(store.dispatch).toHaveBeenCalledWith('createTempEntry', {
-            name: 'not-existent.md',
-            type: 'blob',
-          });
-        })
-        .then(done)
-        .catch(done.fail);
+    describe('non-existent branch', () => {
+      beforeEach(() => {
+        spyOn(store, 'dispatch').and.returnValue(Promise.reject());
+      });
+      it('dispatches correct branch actions', done => {
+        openBranch(store, branch)
+          .then(() => {
+            expect(store.dispatch.calls.allArgs()).toEqual([
+              ['setCurrentBranchId', branch.branchId],
+              ['getBranchData', branch],
+              ['showBranchNotFoundError', branch.branchId],
+            ]);
+          })
+          .then(done)
+          .catch(done.fail);
+      });
     });
   });
 });

spec/javascripts/ide/stores/actions/tree_spec.js

@@ -93,38 +93,6 @@ describe('Multi-file store tree actions', () => {
     });
     describe('error', () => {
-      it('dispatches branch not found actions when response is 404', done => {
-        const dispatch = jasmine.createSpy('dispatchSpy');
-
-        store.state.projects = {
-          'abc/def': {
-            web_url: `${gl.TEST_HOST}/files`,
-          },
-        };
-
-        mock.onGet(/(.*)/).replyOnce(404);
-
-        getFiles(
-          {
-            commit() {},
-            dispatch,
-            state: store.state,
-          },
-          {
-            projectId: 'abc/def',
-            branchId: 'master-testing',
-          },
-        )
-          .then(done.fail)
-          .catch(() => {
-            expect(dispatch.calls.argsFor(0)).toEqual([
-              'showBranchNotFoundError',
-              'master-testing',
-            ]);
-            done();
-          });
-      });
-
       it('dispatches error action', done => {
         const dispatch = jasmine.createSpy('dispatchSpy');

spec/javascripts/ide/stores/actions_spec.js

@@ -9,12 +9,15 @@ import actions, {
   setErrorMessage,
   deleteEntry,
   renameEntry,
+  getBranchData,
 } from '~/ide/stores/actions';
+import axios from '~/lib/utils/axios_utils';
 import store from '~/ide/stores';
 import * as types from '~/ide/stores/mutation_types';
 import router from '~/ide/ide_router';
 import { resetStore, file } from '../helpers';
 import testAction from '../../helpers/vuex_action_helper';
+import MockAdapter from 'axios-mock-adapter';
 describe('Multi-file store actions', () => {
   beforeEach(() => {
@@ -560,4 +563,65 @@ describe('Multi-file store actions', () => {
       );
     });
   });
+
+  describe('getBranchData', () => {
+    let mock;
+
+    beforeEach(() => {
+      mock = new MockAdapter(axios);
+    });
+
+    afterEach(() => {
+      mock.restore();
+    });
+
+    describe('error', () => {
+      let dispatch;
+      const callParams = [
+        {
+          commit() {},
+          state: store.state,
+        },
+        {
+          projectId: 'abc/def',
+          branchId: 'master-testing',
+        },
+      ];
+
+      beforeEach(() => {
+        dispatch = jasmine.createSpy('dispatchSpy');
+        document.body.innerHTML += '<div class="flash-container"></div>';
+      });
+
+      afterEach(() => {
+        document.querySelector('.flash-container').remove();
+      });
+
+      it('passes the error further unchanged without dispatching any action when response is 404', done => {
+        mock.onGet(/(.*)/).replyOnce(404);
+
+        getBranchData(...callParams)
+          .then(done.fail)
+          .catch(e => {
+            expect(dispatch.calls.count()).toEqual(0);
+            expect(e.response.status).toEqual(404);
+            expect(document.querySelector('.flash-alert')).toBeNull();
+            done();
+          });
+      });
+
+      it('does not pass the error further and flashes an alert if error is not 404', done => {
+        mock.onGet(/(.*)/).replyOnce(418);
+
+        getBranchData(...callParams)
+          .then(done.fail)
+          .catch(e => {
+            expect(dispatch.calls.count()).toEqual(0);
+            expect(e.response).toBeUndefined();
+            expect(document.querySelector('.flash-alert')).not.toBeNull();
+            done();
+          });
+      });
+    });
+  });
 });