Tests
Hamburger Theme Selector
In the upper right of the page you will see the hamburger button 
which is part of your header links 
When the hamburger button is clicked a drop down appears. One of the groups of links are for the user selectable base themes, e.g.
In the image above Light is the currently selected base theme. Clicking on a different name should select a different base theme.
Component Themes
Iconified Header Links
In the upper right of the page you should see the in-box 
which links to your personal mail-box and is part of your header links, i.e.
Linkify words in post
SWISH
SWI-Prolog
mqi
swiplserver
Each of the 4 lines above should be clickable links.
Auto linkify Prolog predicates
member/2
append/3
(==)/2
Each of the 3 lines above should be clickable links.
DiscoTOC - automatic table of contents
On the right you should see a table of contents for this page.
If you see just the word Tests then scroll the content of the post down and more of the entries should appear. The subentries expand/collapse as the context section moves corresponding to the table of content.
The entries in the table of contents on the right are also links that should work.
When you mouse over a section name in the post, 
will appear at the end and the link can typically be copied in most Internet browsers via the right click context menu.
Raw post button
Discourse makes use of Markdown for simple editing of post. Sometimes you see a complex post and want to know the Markdown used before text is converted (cooked) into HTML.
At the end of a post/reply is the raw button 
for displaying the raw text. You will have to click the ellipsis 
to see the raw button exposed. Clicking the raw button will display
Note: The above is an image capture so the scroll bar will not work.
Plugins
Discourse Math Plugin
MathJax
Inline math is done by wrapping text with the $ symbol like so $E=MC^2$ renders as
E=MC^2
Above line should look like
Blocks of math are done by wrapping text in a double $$ sign.
$$
E=MC^2
$$
renders as
The above line should look like
asciimath
Math is done by wrapping text with a % sign
%
sum_(i=1)^n i^3=((n(n+1))/2)^2
%
renders as
sum_(i=1)^n i^3=((n(n+1))/2)^2
The above line should look like
discourse-solved
This presents an additional button as an icon at the footer of a post for any post after the first, the first is considered the question, any post after the first is considered a possible answer.
In the second post below you should see the Solution button. It has been selected.
When a post has a selected solution it is displayed in the list of post having 
before the name, e.g.
discourse-spoiler-alert
A spoiler is created using the Markdown tag spoiler
This
[spoiler]This is blurred by the spoiler[/spoiler]
renders as
This is blurred by the spoiler
The above line should look like this when it has not been selected (mouse click)
and when selected like this
Notes: This does not work in e-mails
Note for site admins.
If there is something wrong with the page