test/extensions/unordered_list_with_checkboxes.unit

>>> checkbox with space
* [ ] one
* [ ] two
<<<
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox"></input>one</li>
<li class="task-list-item"><input type="checkbox"></input>two</li>
</ul>
>>> empty checkbox
* [] one
* [] two
<<<
<ul>
<li>[] one</li>
<li>[] two</li>
</ul>
>>> checkbox with x
* [x] one
* [x] two
<<<
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" checked="true"></input>one</li>
<li class="task-list-item"><input type="checkbox" checked="true"></input>two</li>
</ul>
>>> checkbox with X
* [X] one
* [X] two
<<<
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" checked="true"></input>one</li>
<li class="task-list-item"><input type="checkbox" checked="true"></input>two</li>
</ul>
>>> mixed checkboxes
* [ ] one
* [] two
* [x] three
* [X] four
* five
<<<
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox"></input>one</li>
<li>[] two</li>
<li class="task-list-item"><input type="checkbox" checked="true"></input>three</li>
<li class="task-list-item"><input type="checkbox" checked="true"></input>four</li>
<li>five</li>
</ul>
>>> mixed leading spaces
*[ ] zero
* [ ] one
*  [ ] two
*   [ ] three
*    [ ] four
*     [ ] five
<<<
<p>*[ ] zero</p>
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox"></input>one</li>
<li class="task-list-item"><input type="checkbox"></input>two</li>
<li class="task-list-item"><input type="checkbox"></input>three</li>
<li class="task-list-item"><input type="checkbox"></input>four</li>
<li>
<pre><code>[ ] five
</code></pre>
</li>
</ul>