Update link preview test cases (#5620)

tests/test-link-preview.md

@@ -14,64 +14,40 @@ Post location variation:
 Test the above variations with the below sample messages (e.g. 1-A, 2-B, 3-C, 4-D, etc.) 
 
 ```
-#### A) News: The Globe and Mail 
-
-Link 1 example: http://www.theglobeandmail.com/news/national/three-canadians-shortlisted-for-global-teacher-prize/article33429901/
-
-Link 2 example: http://www.theglobeandmail.com/news/toronto/a-last-minute-guide-for-made-in-toronto-gifts/article33426221/
-
-Link 3 example: http://www.theglobeandmail.com/opinion/as-2016-crashed-in-flames-libraries-were-the-last-good-place/article33427957/
-```
-
-```
-#### B) Twitter
-
-Link 1 example: https://twitter.com/mattermosthq/status/784382907896987648
-
-Link 2 example: https://twitter.com/ArchieComics/status/813007703861841920
-
-Link 3 example: https://twitter.com/ValiantComics/status/813066492187201536
-
-```
-
-
-```
-#### C) Wikipedia 
+#### A) No link preview
 
 Link 1 example: https://en.wikipedia.org/wiki/Olympus_Mons
 
-Link 2 example: https://en.wikipedia.org/wiki/Climate_of_Mars#Effect_of_dust_storms
-
-Link 3 example: https://en.wikipedia.org/wiki/Mars_Exploration_Rover
+Link 2 example: http://www.techmeme.com/
 
+Link 3 example: https://about.gitlab.com/
 ```
 
 ```
-#### D) YouTube 
+#### B) Link preview without an image
 
-Link 1 example: https://www.youtube.com/watch?v=fDu1S-MMClw
-
-Link 2 example: https://www.youtube.com/watch?v=GaCjjda5v1o
-
-Link 3 example: https://www.youtube.com/watch?v=1Ui44_-N9y0
-
-```
-
-
-```
-#### E) GitHub
-
-Link 1 example: https://github.com/mattermost
+Link 1 example: https://coveralls.io/builds/9818822/source?filename=app%2Faudit.go
 ```
 
 ```
-#### F) Webpage: Techmeme 
+#### C) Link preview with image in top right corner
 
-Link 1 example: http://www.techmeme.com/
+Link 1 example: http://www.theglobeandmail.com/news/national/three-canadians-shortlisted-for-global-teacher-prize/article33429901/
+
+Link 2 example: https://twitter.com/ArchieComics/status/813007703861841920
+
+Link 3 example: https://github.com/mattermost
+
+Link 4 example: http://stackoverflow.com/questions/36650437/using-mattermost-api-via-gitlab-oauth-as-an-end-user-with-username-and-password
 ```
 
 ```
-#### G) StackOverflow 
+#### D) Link preview with image at the bottom
+
+If "Account Settings > Display > Default appearance of image link previews" is set to "Collapsed", you must click the expand arrows to display the image.
+
+Link 1 example: https://www.yahoo.com/news/panasonic-unveils-solar-roof-may-212400917.html
+
+Link 2 example: https://about.mattermost.com
 
-Link 1 example: http://stackoverflow.com/questions/36650437/using-mattermost-api-via-gitlab-oauth-as-an-end-user-with-username-and-password
 ```