Revert "MM-14810 Fix for channel header loading in center channel (#2596

)"

This reverts commit 6bc18af.

components/post_view/post_list.jsx

@@ -281,7 +281,7 @@ export default class PostList extends React.PureComponent {
  } else {
  this.loadingMorePosts = false;
  if (this.mounted && this.props.posts) {
- const atEnd = !moreToLoad;
+ const atEnd = !moreToLoad && this.props.posts.length < this.props.postVisibility;
  const newState = {
  atEnd,
  autoRetryEnable: true,

components/post_view/post_list.test.jsx

@@ -4,31 +4,9 @@
 import React from 'react';
 import {shallow} from 'enzyme';
 
-import {mountWithIntl} from 'tests/helpers/intl-test-helper.jsx';
-
 import PostList from 'components/post_view/post_list.jsx';
 import {PostListRowListIds} from 'utils/constants.jsx';
 
-const returnDummyPostsAndIds = () => {
- const postsArray = [];
- const Ids = [];
- const createAtValue = 12346;
- for (var i = 1; i <= 30; i++) {
- const postCreatedAt = createAtValue + i;
- postsArray.push({
- id: `${postCreatedAt}`,
- message: 'test',
- create_at: postCreatedAt,
- });
- Ids.push(`${postCreatedAt}`);
- }
-
- return {
- postsArray,
- Ids,
- };
-};
-
 describe('components/post_view/post_list', () => {
  const posts = [{
  id: 'postId',
@@ -62,7 +40,19 @@ describe('components/post_view/post_list', () => {
  };
 
  test('should return index of loader when all are unread messages in the view and call increasePostVisibility action', () => {
- const {Ids, postsArray} = returnDummyPostsAndIds();
+ const postsArray = [];
+ const Ids = [];
+ const createAtValue = 12346;
+ for (var i = 1; i <= 30; i++) {
+ const postCreatedAt = createAtValue + i;
+ postsArray.push({
+ id: `${postCreatedAt}`,
+ message: 'test',
+ create_at: postCreatedAt,
+ });
+ Ids.push(`${postCreatedAt}`);
+ }
+
  const postListIds = [...Ids, PostListRowListIds.START_OF_NEW_MESSAGES];
  const props = {
  ...baseProps,
@@ -75,20 +65,4 @@ describe('components/post_view/post_list', () => {
  expect(initScrollToIndex).toEqual({index: 31, position: 'start'}); //Loader will be at pos 31
  expect(actions.increasePostVisibility).toHaveBeenCalledTimes(1);
  });
-
- test('should set the state of atEnd to true when increasePostVisibility returns moreToLoad false', async () => {
- const increasePostVisibilityMock = jest.fn().mockResolvedValue({moreToLoad: false});
- const props = {
- ...baseProps,
- actions: {
- ...baseProps.actions,
- increasePostVisibility: increasePostVisibilityMock,
- },
- };
- const wrapper = mountWithIntl(<PostList {...props}/>);
- await wrapper.instance().loadMorePosts();
- expect(increasePostVisibilityMock).toHaveBeenCalledTimes(1);
- wrapper.update();
- expect(wrapper.state('atEnd')).toEqual(true);
- });
 });