address review

fix indent in tox.ini
fix and extend tests for error

testing/root/test_error.py

@@ -2,6 +2,7 @@
 import py
 
 import errno
+import subprocess
 
 
 def test_error_classes():
@@ -33,7 +34,7 @@ def test_unknown_error():
     assert cls is cls2
 
 
-def test_error_conversion_ENOTDIR(testdir):
+def test_error_conversion_enotdir(testdir):
     p = testdir.makepyfile("")
     excinfo = py.test.raises(py.error.Error, py.error.checked_call, p.listdir)
     assert isinstance(excinfo.value, EnvironmentError)
@@ -46,6 +47,11 @@ def test_checked_call_supports_kwargs(tmpdir):
     py.error.checked_call(tempfile.mkdtemp, dir=str(tmpdir))
 
 
+def test_error_importable():
+    subprocess.check_call(
+        [sys.executable, '-c', 'from py.error import ENOENT'])
+
+
 try:
     import unittest
     unittest.TestCase.assertWarns
@@ -56,13 +62,13 @@ def test_checked_call_supports_kwargs(tmpdir):
     import warnings
 
     class Case(unittest.TestCase):
-        def test_assertWarns(self):
+        def test_assert_warns(self):
             # Clear everything "py.*" from sys.modules and re-import py
             # as a fresh start
             for mod in tuple(sys.modules.keys()):
                 if mod and (mod == 'py' or mod.startswith('py.')):
                     del sys.modules[mod]
-            import py
+            __import__('py')
 
             with self.assertWarns(UserWarning):
                 warnings.warn('this should work')

tox.ini

@@ -4,14 +4,13 @@ envlist=py{27,34,35,36}-pytest{29,30,31}
 [testenv]
 changedir=testing
 commands=
-    pip install -U .. # hande the install order fallout since pytest depends on pip
-
-	py.test --confcutdir=.. -rfsxX --junitxml={envlogdir}/junit-{envname}.xml []
+  pip install -U .. # hande the install order fallout since pytest depends on pip
+  py.test --confcutdir=.. -rfsxX --junitxml={envlogdir}/junit-{envname}.xml []
 deps=
   attrs
-	pytest29: pytest~=2.9.0
-	pytest30: pytest~=3.0.0
-	pytest31: pytest~=3.1.0
+  pytest29: pytest~=2.9.0
+  pytest30: pytest~=3.0.0
+  pytest31: pytest~=3.1.0
 
 [testenv:py27-xdist]
 basepython=python2.7