Merge pull request #20 from vapier/tests

setup.py: add a test command

setup.py

@@ -1,8 +1,20 @@
-from distutils.core import setup
+from distutils.core import setup, Command
 
 from jsonref import __version__
 
 
+class PyTest(Command):
+    user_options = []
+    def initialize_options(self):
+        pass
+    def finalize_options(self):
+        pass
+    def run(self):
+        import sys,subprocess
+        errno = subprocess.call(['py.test', 'tests.py'])
+        raise SystemExit(errno)
+
+
 with open("README.rst") as readme:
     long_description = readme.read()
 
@@ -36,4 +48,7 @@
     license="MIT",
     long_description=long_description,
     url="https://github.com/gazpachoking/jsonref",
+    cmdclass={
+        'test': PyTest,
+    },
 )