revert docutils.writers.null.Writer.output to None, now with docutils.io.Output and test support

git-svn-id: http://svn.code.sf.net/p/docutils/code/trunk@3646 929543f6-e4f2-0310-98a6-ba3bd3dd1d04

3 files changed, 15 insertions, 10 deletions

diff --git a/docutils/docutils/writers/null.py b/docutils/docutils/writers/null.py
index faf7bbfad..cf3566480 100644
--- a/docutils/docutils/writers/null.py
+++ b/docutils/docutils/writers/null.py
@@ -20,4 +20,4 @@ class Writer(writers.Writer):
     config_section_dependencies = ('writers',)
 
     def translate(self):
-        self.output = u''
+        pass
diff --git a/docutils/test/DocutilsTestSupport.py b/docutils/test/DocutilsTestSupport.py
index 72d5cdbc2..c0c2c331b 100644
--- a/docutils/test/DocutilsTestSupport.py
+++ b/docutils/test/DocutilsTestSupport.py
@@ -153,13 +153,19 @@ class CustomTestCase(StandardTestCase):
             expected = expected.encode('raw_unicode_escape')
         try:
             self.assertEquals(output, expected)
-        except AssertionError:
+        except AssertionError, error:
             print >>sys.stderr, '\n%s\ninput:' % (self,)
             print >>sys.stderr, input
-            print >>sys.stderr, '-: expected\n+: output'
-            print >>sys.stderr, ''.join(self.compare(expected.splitlines(1),
-                                                     output.splitlines(1)))
-            raise
+            try:
+                comparison = ''.join(self.compare(expected.splitlines(1),
+                                                  output.splitlines(1)))
+                print >>sys.stderr, '-: expected\n+: output'
+                print >>sys.stderr, comparison
+            except AttributeError:      # expected or output not a string
+                # alternative output for non-strings:
+                print >>sys.stderr, 'expected: %r' % expected
+                print >>sys.stderr, 'output:   %r' % output
+            raise error
 
     def failUnlessEqual(self, first, second, msg=None):
         """Fail if the two objects are unequal as determined by the '=='
@@ -819,8 +825,8 @@ def _format_str(*args):
     return_tuple = []
     for i in args:
         r = repr(i)
-        if '\n' in i and (isinstance(i, StringType) or
-                          isinstance(i, UnicodeType)):
+        if ( (isinstance(i, StringType) or isinstance(i, UnicodeType))
+             and '\n' in i):
             stripped = ''
             if isinstance(i, UnicodeType):
                 # stripped = 'u' or 'U'
diff --git a/docutils/test/test_writers/test_null.py b/docutils/test/test_writers/test_null.py
index 9f8d8fe19..da385e565 100755
--- a/docutils/test/test_writers/test_null.py
+++ b/docutils/test/test_writers/test_null.py
@@ -23,8 +23,7 @@ totest['basic'] = [
 ["""\
 This is a paragraph.
 """,
-"""\
-"""]
+None]
 ]
 
 if __name__ == '__main__':