Make minId reset with minVisibleId to prevent gaps when showing new

src/modules/statuses.js

@@ -333,6 +333,7 @@ export const mutations = {
     oldTimeline.newStatusCount = 0
     oldTimeline.visibleStatuses = slice(oldTimeline.statuses, 0, 50)
     oldTimeline.minVisibleId = last(oldTimeline.visibleStatuses).id
+    oldTimeline.minId = oldTimeline.minVisibleId
     oldTimeline.visibleStatusesObject = {}
     each(oldTimeline.visibleStatuses, (status) => { oldTimeline.visibleStatusesObject[status.id] = status })
   },

test/unit/specs/modules/statuses.spec.js

@@ -14,14 +14,15 @@ const makeMockStatus = ({id, text, type = 'status'}) => {
   }
 }
 
-describe('Statuses.prepareStatus', () => {
+describe('Statuses module', () => {
+  describe('prepareStatus', () => {
     it('sets deleted flag to false', () => {
       const aStatus = makeMockStatus({id: '1', text: 'Hello oniichan'})
       expect(prepareStatus(aStatus).deleted).to.eq(false)
     })
   })
 
-describe('The Statuses module', () => {
+  describe('addNewStatuses', () => {
     it('adds the status to allStatuses and to the given timeline', () => {
       const state = defaultState()
       const status = makeMockStatus({id: '1'})
@@ -238,7 +239,25 @@ describe('The Statuses module', () => {
       expect(state.timelines.public.visibleStatuses[0].fave_num).to.eql(1)
       expect(state.timelines.public.visibleStatuses[0].favorited).to.eql(true)
     })
+  })
 
+  describe('showNewStatuses', () => {
+    it('resets the minId to the min of the visible statuses when adding new to visible statuses', () => {
+      const state = defaultState()
+      const status = makeMockStatus({ id: '10' })
+      mutations.addNewStatuses(state, { statuses: [status], showImmediately: true, timeline: 'public' })
+      const newStatus = makeMockStatus({ id: '20' })
+      mutations.addNewStatuses(state, { statuses: [newStatus], showImmediately: false, timeline: 'public' })
+      state.timelines.public.minId = '5'
+      mutations.showNewStatuses(state, { timeline: 'public' })
+
+      expect(state.timelines.public.visibleStatuses.length).to.eql(2)
+      expect(state.timelines.public.minVisibleId).to.eql('10')
+      expect(state.timelines.public.minId).to.eql('10')
+    })
+  })
+
+  describe('clearTimeline', () => {
     it('keeps userId when clearing user timeline', () => {
       const state = defaultState()
       state.timelines.user.userId = 123
@@ -247,6 +266,7 @@ describe('The Statuses module', () => {
 
       expect(state.timelines.user.userId).to.eql(123)
     })
+  })
 
   describe('notifications', () => {
     it('removes a notification when the notice gets removed', () => {