Reapply "Merge branch '48817-fix-mr-changes-discussion-navigation' into 'master'"

This reverts commit e0fe97ca4a506405af8e85368f2c69cda637e192.

4 files changed, 262 insertions, 26 deletions

diff --git a/spec/javascripts/notes/components/discussion_counter_spec.js b/spec/javascripts/notes/components/discussion_counter_spec.js
index a3869cc6498..d09bc5037ef 100644
--- a/spec/javascripts/notes/components/discussion_counter_spec.js
+++ b/spec/javascripts/notes/components/discussion_counter_spec.js
@@ -46,7 +46,7 @@ describe('DiscussionCounter component', () => {
           discussions,
         });
         setFixtures(`
-          <div data-discussion-id="${firstDiscussionId}"></div>
+          <div class="discussion" data-discussion-id="${firstDiscussionId}"></div>
         `);
 
         vm.jumpToFirstUnresolvedDiscussion();
diff --git a/spec/javascripts/notes/components/noteable_discussion_spec.js b/spec/javascripts/notes/components/noteable_discussion_spec.js
index f3f50aed232..2a01bd85520 100644
--- a/spec/javascripts/notes/components/noteable_discussion_spec.js
+++ b/spec/javascripts/notes/components/noteable_discussion_spec.js
@@ -14,6 +14,7 @@ describe('noteable_discussion component', () => {
   preloadFixtures(discussionWithTwoUnresolvedNotes);
 
   beforeEach(() => {
+    window.mrTabs = {};
     store = createStore();
     store.dispatch('setNoteableData', noteableDataMock);
     store.dispatch('setNotesData', notesDataMock);
@@ -106,33 +107,29 @@ describe('noteable_discussion component', () => {
 
   describe('methods', () => {
     describe('jumpToNextDiscussion', () => {
-      it('expands next unresolved discussion', () => {
-        spyOn(vm, 'expandDiscussion').and.stub();
-        const discussions = [
-          discussionMock,
-          {
-            ...discussionMock,
-            id: discussionMock.id + 1,
-            notes: [{ ...discussionMock.notes[0], resolvable: true, resolved: true }],
-          },
-          {
-            ...discussionMock,
-            id: discussionMock.id + 2,
-            notes: [{ ...discussionMock.notes[0], resolvable: true, resolved: false }],
-          },
-        ];
-        const nextDiscussionId = discussionMock.id + 2;
-        store.replaceState({
-          ...store.state,
-          discussions,
-        });
-        setFixtures(`
-          <div data-discussion-id="${nextDiscussionId}"></div>
-        `);
+      it('expands next unresolved discussion', done => {
+        const discussion2 = getJSONFixture(discussionWithTwoUnresolvedNotes)[0];
+        discussion2.resolved = false;
+        discussion2.id = 'next'; // prepare this for being identified as next one (to be jumped to)
+        vm.$store.dispatch('setInitialNotes', [discussionMock, discussion2]);
+        window.mrTabs.currentAction = 'show';
+
+        Vue.nextTick()
+          .then(() => {
+            spyOn(vm, 'expandDiscussion').and.stub();
+
+            const nextDiscussionId = discussion2.id;
 
-        vm.jumpToNextDiscussion();
+            setFixtures(`
+              <div class="discussion" data-discussion-id="${nextDiscussionId}"></div>
+            `);
 
-        expect(vm.expandDiscussion).toHaveBeenCalledWith({ discussionId: nextDiscussionId });
+            vm.jumpToNextDiscussion();
+
+            expect(vm.expandDiscussion).toHaveBeenCalledWith({ discussionId: nextDiscussionId });
+          })
+          .then(done)
+          .catch(done.fail);
       });
     });
   });
diff --git a/spec/javascripts/notes/mock_data.js b/spec/javascripts/notes/mock_data.js
index be2a8ba67fe..67f6a9629d9 100644
--- a/spec/javascripts/notes/mock_data.js
+++ b/spec/javascripts/notes/mock_data.js
@@ -1168,3 +1168,87 @@ export const collapsedSystemNotes = [
     diff_discussion: false,
   },
 ];
+
+export const discussion1 = {
+  id: 'abc1',
+  resolvable: true,
+  resolved: false,
+  diff_file: {
+    file_path: 'about.md',
+  },
+  position: {
+    formatter: {
+      new_line: 50,
+      old_line: null,
+    },
+  },
+  notes: [
+    {
+      created_at: '2018-07-04T16:25:41.749Z',
+    },
+  ],
+};
+
+export const resolvedDiscussion1 = {
+  id: 'abc1',
+  resolvable: true,
+  resolved: true,
+  diff_file: {
+    file_path: 'about.md',
+  },
+  position: {
+    formatter: {
+      new_line: 50,
+      old_line: null,
+    },
+  },
+  notes: [
+    {
+      created_at: '2018-07-04T16:25:41.749Z',
+    },
+  ],
+};
+
+export const discussion2 = {
+  id: 'abc2',
+  resolvable: true,
+  resolved: false,
+  diff_file: {
+    file_path: 'README.md',
+  },
+  position: {
+    formatter: {
+      new_line: null,
+      old_line: 20,
+    },
+  },
+  notes: [
+    {
+      created_at: '2018-07-04T12:05:41.749Z',
+    },
+  ],
+};
+
+export const discussion3 = {
+  id: 'abc3',
+  resolvable: true,
+  resolved: false,
+  diff_file: {
+    file_path: 'README.md',
+  },
+  position: {
+    formatter: {
+      new_line: 21,
+      old_line: null,
+    },
+  },
+  notes: [
+    {
+      created_at: '2018-07-05T17:25:41.749Z',
+    },
+  ],
+};
+
+export const unresolvableDiscussion = {
+  resolvable: false,
+};
diff --git a/spec/javascripts/notes/stores/getters_spec.js b/spec/javascripts/notes/stores/getters_spec.js
index 41599e00122..7f8ede51508 100644
--- a/spec/javascripts/notes/stores/getters_spec.js
+++ b/spec/javascripts/notes/stores/getters_spec.js
@@ -5,6 +5,11 @@ import {
   noteableDataMock,
   individualNote,
   collapseNotesMock,
+  discussion1,
+  discussion2,
+  discussion3,
+  resolvedDiscussion1,
+  unresolvableDiscussion,
 } from '../mock_data';
 
 const discussionWithTwoUnresolvedNotes = 'merge_requests/resolved_diff_discussion.json';
@@ -109,4 +114,154 @@ describe('Getters Notes Store', () => {
       expect(getters.isNotesFetched(state)).toBeFalsy();
     });
   });
+
+  describe('allResolvableDiscussions', () => {
+    it('should return only resolvable discussions in same order', () => {
+      const localGetters = {
+        allDiscussions: [
+          discussion3,
+          unresolvableDiscussion,
+          discussion1,
+          unresolvableDiscussion,
+          discussion2,
+        ],
+      };
+
+      expect(getters.allResolvableDiscussions(state, localGetters)).toEqual([
+        discussion3,
+        discussion1,
+        discussion2,
+      ]);
+    });
+
+    it('should return empty array if there are no resolvable discussions', () => {
+      const localGetters = {
+        allDiscussions: [unresolvableDiscussion, unresolvableDiscussion],
+      };
+
+      expect(getters.allResolvableDiscussions(state, localGetters)).toEqual([]);
+    });
+  });
+
+  describe('unresolvedDiscussionsIdsByDiff', () => {
+    it('should return all discussions IDs in diff order', () => {
+      const localGetters = {
+        allResolvableDiscussions: [discussion3, discussion1, discussion2],
+      };
+
+      expect(getters.unresolvedDiscussionsIdsByDiff(state, localGetters)).toEqual([
+        'abc1',
+        'abc2',
+        'abc3',
+      ]);
+    });
+
+    it('should return empty array if all discussions have been resolved', () => {
+      const localGetters = {
+        allResolvableDiscussions: [resolvedDiscussion1],
+      };
+
+      expect(getters.unresolvedDiscussionsIdsByDiff(state, localGetters)).toEqual([]);
+    });
+  });
+
+  describe('unresolvedDiscussionsIdsByDate', () => {
+    it('should return all discussions in date ascending order', () => {
+      const localGetters = {
+        allResolvableDiscussions: [discussion3, discussion1, discussion2],
+      };
+
+      expect(getters.unresolvedDiscussionsIdsByDate(state, localGetters)).toEqual([
+        'abc2',
+        'abc1',
+        'abc3',
+      ]);
+    });
+
+    it('should return empty array if all discussions have been resolved', () => {
+      const localGetters = {
+        allResolvableDiscussions: [resolvedDiscussion1],
+      };
+
+      expect(getters.unresolvedDiscussionsIdsByDate(state, localGetters)).toEqual([]);
+    });
+  });
+
+  describe('unresolvedDiscussionsIdsOrdered', () => {
+    const localGetters = {
+      unresolvedDiscussionsIdsByDate: ['123', '456'],
+      unresolvedDiscussionsIdsByDiff: ['abc', 'def'],
+    };
+
+    it('should return IDs ordered by diff when diffOrder param is true', () => {
+      expect(getters.unresolvedDiscussionsIdsOrdered(state, localGetters)(true)).toEqual([
+        'abc',
+        'def',
+      ]);
+    });
+
+    it('should return IDs ordered by date when diffOrder param is not true', () => {
+      expect(getters.unresolvedDiscussionsIdsOrdered(state, localGetters)(false)).toEqual([
+        '123',
+        '456',
+      ]);
+      expect(getters.unresolvedDiscussionsIdsOrdered(state, localGetters)(undefined)).toEqual([
+        '123',
+        '456',
+      ]);
+    });
+  });
+
+  describe('isLastUnresolvedDiscussion', () => {
+    const localGetters = {
+      unresolvedDiscussionsIdsOrdered: () => ['123', '456', '789'],
+    };
+
+    it('should return true if the discussion id provided is the last', () => {
+      expect(getters.isLastUnresolvedDiscussion(state, localGetters)('789')).toBe(true);
+    });
+
+    it('should return false if the discussion id provided is not the last', () => {
+      expect(getters.isLastUnresolvedDiscussion(state, localGetters)('123')).toBe(false);
+      expect(getters.isLastUnresolvedDiscussion(state, localGetters)('456')).toBe(false);
+    });
+  });
+
+  describe('nextUnresolvedDiscussionId', () => {
+    const localGetters = {
+      unresolvedDiscussionsIdsOrdered: () => ['123', '456', '789'],
+    };
+
+    it('should return the ID of the discussion after the ID provided', () => {
+      expect(getters.nextUnresolvedDiscussionId(state, localGetters)('123')).toBe('456');
+      expect(getters.nextUnresolvedDiscussionId(state, localGetters)('456')).toBe('789');
+      expect(getters.nextUnresolvedDiscussionId(state, localGetters)('789')).toBe(undefined);
+    });
+  });
+
+  describe('firstUnresolvedDiscussionId', () => {
+    const localGetters = {
+      unresolvedDiscussionsIdsByDate: ['123', '456'],
+      unresolvedDiscussionsIdsByDiff: ['abc', 'def'],
+    };
+
+    it('should return the first discussion id by diff when diffOrder param is true', () => {
+      expect(getters.firstUnresolvedDiscussionId(state, localGetters)(true)).toBe('abc');
+    });
+
+    it('should return the first discussion id by date when diffOrder param is not true', () => {
+      expect(getters.firstUnresolvedDiscussionId(state, localGetters)(false)).toBe('123');
+      expect(getters.firstUnresolvedDiscussionId(state, localGetters)(undefined)).toBe('123');
+    });
+
+    it('should be falsy if all discussions are resolved', () => {
+      const localGettersFalsy = {
+        unresolvedDiscussionsIdsByDiff: [],
+        unresolvedDiscussionsIdsByDate: [],
+      };
+
+      expect(getters.firstUnresolvedDiscussionId(state, localGettersFalsy)(true)).toBeFalsy();
+      expect(getters.firstUnresolvedDiscussionId(state, localGettersFalsy)(false)).toBeFalsy();
+    });
+  });
 });