test_should_highlight_bash_syntax_without_name failing on openSUSE Tumbleweed

[jayvdb]

This test has started failing out of the blue. I suspect it is due to a more recent version of Markdown, or something similar.

[   67s] =================================== FAILURES ===================================
[   67s] _______ HighlightTagTests.test_should_highlight_bash_syntax_without_name _______
[   67s] 
[   67s] self = <tests.templatetags.test_highlighting.HighlightTagTests testMethod=test_should_highlight_bash_syntax_without_name>
[   67s] 
[   67s]         def test_should_highlight_bash_syntax_without_name(self):
[   67s]             content = """{% load highlighting %}
[   67s]     {% highlight 'bash' %}
[   67s]     echo "Hello $1"
[   67s]     {% endhighlight %}"""
[   67s]             expected_result = '''<div class="highlight"><pre><span></span><span class="nb">echo</span> <span class="s2">&quot;Hello </span><span class="nv">$1</span><span class="s2">&quot;</span>
[   67s]     </pre></div>'''
[   67s]     
[   67s]             result = Template(content).render(self.ctx)
[   67s]     
[   67s] >           self.assertHTMLEqual(result, expected_result)
[   67s] 
[   67s] tests/templatetags/test_highlighting.py:52: 
[   67s] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
[   67s] /usr/lib/python3.8/site-packages/django/test/testcases.py:1034: in assertHTMLEqual
[   67s]     self.fail(self._formatMessage(msg, standardMsg))
[   67s] E   AssertionError: <div class="highlight">
[   67s] E   <pre>
[   67s] E   <span><span class="nb">
[   67s] E   echo
[   67s] E   </span><span class="w [truncated]... != <div class="highlight">
[   67s] E   <pre>
[   67s] E   <span><span class="nb">
[   67s] E   echo
[   67s] E   </span><span class="s [truncated]...
[   67s] E     <div class="highlight">
[   67s] E     <pre>
[   67s] E     <span><span class="nb">
[   67s] E     echo
[   67s] E   - </span><span class="w"><span class="s2">
[   67s] E   ?              ----------------
[   67s] E   
[   67s] E   + </span><span class="s2">
[   67s] E     &quot;Hello
[   67s] E     </span><span class="nv">
[   67s] E     $1
[   67s] E     </span><span class="s2">
[   67s] E     &quot;
[   67s] E     </span>
[   67s] E     </pre>
[   67s] E     </div>

[foarsitter]

It due to an upgrade of Pygments from 2.13.0 to 2.14.0. According there changelog "The HTML lexer no longer emits empty spans for whitespace (pygments/pygments#2304)". I will submit a PR that updates the test to the new behavior.