Changed markup tests to not fail if required modules are not installed

git-svn-id: http://code.djangoproject.com/svn/django/trunk@483 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/othertests/markup.py

@@ -1,45 +1,67 @@
 # Quick tests for the markup templatetags (django.contrib.markup)
-#
-# Requires that all supported markup modules be installed
-# (http://dealmeida.net/projects/textile/, 
-# http://www.freewisdom.org/projects/python-markdown,  and 
-# http://docutils.sf.net/)
-
 
 from django.core.template import Template, Context
 import django.contrib.markup.templatetags.markup # this registers the filters
 
+# find out if markup modules are installed and tailor the test appropriately
+try:
+    import textile
+except ImportError:
+    textile = None
+
+try:
+    import markdown
+except ImportError:
+    markdown = None
+
+try:
+    import docutils
+except ImportError:
+    docutils = None
+
 # simple examples 'cause this isn't actually testing the markup, just
 # that the filters work as advertised
 
+### test textile
+
 textile_content = """Paragraph 1
 
 Paragraph 2 with "quotes" and @code@"""
 
-markdown_content = """Paragraph 1
+t = Template("{{ textile_content|textile }}")
+rendered = t.render(Context(locals())).strip()
+if textile:
+    assert rendered == """<p>Paragraph 1</p>
 
-## An h2 with *italics*"""
+<p>Paragraph 2 with &#8220;quotes&#8221; and <code>code</code></p>"""
+else:
+    assert rendered == textile_content
+
+### test markdown
 
-rest_content = """Paragraph 1
+markdown_content = """Paragraph 1
 
-Paragraph 2 with a link_
+## An h2"""
 
-.. _link: http://www.example.com/"""
+t = Template("{{ markdown_content|markdown }}")
+rendered = t.render(Context(locals())).strip()
+if textile:
+    assert rendered == """<p>Paragraph 1</p><h2>An h2</h2>"""
+else:
+    assert rendered == markdown_content
 
-t = Template("""{{ textile_content|textile }}
-----
-{{ markdown_content|markdown }}
-----
-{{ rest_content|restructuredtext }}""")
+### test rest
 
-rendered = t.render(Context(locals()))
+rest_content = """Paragraph 1
 
-assert rendered.strip() == """<p>Paragraph 1</p>
+Paragraph 2 with a link_
 
-<p>Paragraph 2 with &#8220;quotes&#8221; and <code>code</code></p>
-----
-<p>Paragraph 1</p><h2>An h2 with *italics*</h2>
+.. _link: http://www.example.com/"""
 
-----
-<p>Paragraph 1</p>
-<p>Paragraph 2 with a <a class="reference" href="http://www.example.com/">link</a></p>"""
+t = Template("{{ rest_content|restructuredtext }}")
+rendered = t.render(Context(locals())).strip()
+if docutils:
+    assert rendered =="""<p>Paragraph 1</p>
+<p>Paragraph 2 with a <a class="reference" href="http://www.example.com/">link</a></p>"""
+else:
+    assert rendered == rest_content