Ensure the unexpected success works in python3

And ensure there is coverage for unexpected success in both python3
and 2 and in travis.

.travis.yml

@@ -12,6 +12,9 @@ env:
       - TOXENV=pypy
       - TOXENV=pypy3
       - TOXENV=pep8
+      - TOXENV=py34-failskip
+      - TOXENV=py34-limit
+      - TOXENV=py34-prefix
 
 notifications:
       irc: "chat.freenode.net#gabbi"

gabbi/case.py

@@ -77,7 +77,10 @@ def potentialFailure(func):
                 else:
                     self._addExpectedFailure(self.result, sys.exc_info())
             else:
-                raise case._UnexpectedSuccess
+                if hasattr(self, '_addUnexpectedSuccess'):
+                    self._addUnexpectedSuccess(self.result)
+                else:
+                    raise case._UnexpectedSuccess
         else:
             func(self)
     return wrapper

gabbi/gabbits_intercept/self.yaml

@@ -12,6 +12,11 @@ tests:
   url: /
   verbose: True
 
+- name: get simple page xfail uxsuccess
+  xfail: true
+  url: /
+  verbose: True
+
 - name: inheritance of defaults
   response_headers:
       x-gabbi-url: $SCHEME://$NETLOC/cow?alpha=1

test-failskip.sh

@@ -1,11 +1,13 @@
-#!/bin/bash
+#!/bin/bash -e
 # Run the tests and confirm that the stuff we expect to skip or fail
 # does.
 
 GREP_FAIL_MATCH='expected failures=8'
-GREP_SKIP_MATCH='skips=2'
+GREP_SKIP_MATCH='skipped=2'
+GREP_UXSUC_MATCH='unexpected successes=1'
 
 python setup.py testr && \
-    testr last --subunit | subunit2pyunit 2>&1 | \
-    grep "${GREP_FAIL_MATCH}" && \
-    testr last | grep "${GREP_SKIP_MATCH}"
+    for match in "${GREP_FAIL_MATCH}" "${GREP_UXSUC_MATCH}" "${GREP_SKIP_MATCH}"; do
+        testr last --subunit | subunit2pyunit 2>&1 | \
+            grep "${match}"
+    done

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 minversion = 1.6
 skipsdist = True
-envlist = py27,py33,py34,py35,pypy,pypy3,pep8,limit,failskip,docs,py34-prefix
+envlist = py27,py33,py34,py35,pypy,pypy3,pep8,limit,failskip,docs,py34-prefix,py34-limit,py34-failskip
 
 [testenv]
 deps = -r{toxinidir}/requirements.txt
@@ -29,6 +29,12 @@ commands = {toxinidir}/test-limit.sh
 [testenv:failskip]
 commands = {toxinidir}/test-failskip.sh
 
+[testenv:py34-limit]
+commands = {toxinidir}/test-limit.sh
+
+[testenv:py34-failskip]
+commands = {toxinidir}/test-failskip.sh
+
 [testenv:cover]
 commands = python setup.py testr --coverage --testr-args="{posargs}"