clarify that python_functions does not apply to unittest.TestCase

classes and their methods.  Addresses issue284.

_pytest/assertion/__init__.py

@@ -78,10 +78,12 @@ def pytest_runtest_setup(item):
 
         for new_expl in hook_result:
             if new_expl:
-                # Don't include pageloads of data unless we are very verbose (-vv)
+                # Don't include pageloads of data unless we
+                # are very verbose (-vv)
                 if len(''.join(new_expl[1:])) > 80*8 and item.config.option.verbose < 2:
                     new_expl[1:] = ['Detailed information truncated, use "-vv" to see']
-                res = '\n~'.join(new_expl)
+                res = '\n'.join(new_expl)
+                print res
                 if item.config.getvalue("assertmode") == "rewrite":
                     # The result will be fed back a python % formatting
                     # operation, which will fail if there are extraneous

_pytest/assertion/util.py

@@ -95,9 +95,6 @@ except NameError:
 def assertrepr_compare(config, op, left, right):
     """Return specialised explanations for some operators/operands"""
     width = 80 - 15 - len(op) - 2  # 15 chars indentation, 1 space around op
-    left_repr = py.io.saferepr(left, maxsize=int(width/2))
-    right_repr = py.io.saferepr(right, maxsize=width-len(left_repr))
-    summary = '%s %s %s' % (left_repr, op, right_repr)
 
     issequence = lambda x: (isinstance(x, (list, tuple, Sequence))
                             and not isinstance(x, basestring))
@@ -120,9 +117,7 @@ def assertrepr_compare(config, op, left, right):
         elif op == 'not in':
             if istext(left) and istext(right):
                 explanation = _notin_text(left, right, verbose)
-    except py.builtin._sysex:
-        raise
-    except:
+    except Exception:
         excinfo = py.code.ExceptionInfo()
         explanation = [
             '(pytest_assertion plugin: representation of details failed.  '
@@ -130,7 +125,15 @@ def assertrepr_compare(config, op, left, right):
 
     if not explanation:
         return None
-
+    if istext(left):
+        left_repr = left[:int(width/2)]
+    else:
+        left_repr = py.io.saferepr(left, maxsize=int(width/2))
+    if istext(right):
+        right_repr = right[:int(width/2)]
+    else:
+        right_repr = py.io.saferepr(right, maxsize=width-len(left_repr))
+    summary = '%s %s %s' % (left_repr, op, right_repr)
     return [summary] + explanation
 
 

doc/en/customize.txt

@@ -121,6 +121,8 @@ Builtin configuration file options
 .. confval:: python_functions
 
    One or more name prefixes determining which test functions
-   and methods are considered as test modules.
+   and methods are considered as test modules.  Note that this
+   has no effect on methods that live on a ``unittest.TestCase`` 
+   derived class.
 
    See :ref:`change naming conventions` for examples.

doc/en/example/pythoncollection.txt

@@ -53,6 +53,12 @@ then the test collection looks like this::
     
     =============================  in 0.01 seconds =============================
 
+.. note::
+   
+   the ``python_functions`` and ``python_classes`` has no effect
+   for ``unittest.TestCase`` test discovery because pytest delegates
+   detection of test case methods to unittest code.
+
 Interpreting cmdline arguments as Python packages
 -----------------------------------------------------