fix issue123 - new "python -m py.test" invocation.

--HG--
branch : trunk

CHANGELOG

@@ -2,6 +2,7 @@
 Changes between 1.3.4 and 1.4.0.dev0
 ==================================================
 
+- fix issue123 - new "python -m py.test" invocation for py.test
 - fix issue124 - make reporting more resilient against tests opening
   files on filedescriptor 1 (stdout).
 - fix issue109 - sibling conftest.py files will not be loaded.

py/test.py

@@ -0,0 +1,6 @@
+if __name__ == '__main__':
+    import sys, py
+    sys.exit(py.test.cmdline.main())
+
+# for more API entry points see the 'tests' definition
+# in __init__.py

testing/acceptance_test.py

@@ -208,3 +208,11 @@ class TestGeneralUsage:
             "*1 pass*",
         ])
 
+
+    def test_python_minus_m_invocation(self, testdir):
+        p1 = testdir.makepyfile("def test_hello(): pass")
+        res = testdir.run(py.std.sys.executable, "-m", "py.test", str(p1))
+        assert res.ret == 0
+        p2 = testdir.makepyfile("def test_world(): 0/0")
+        res = testdir.run(py.std.sys.executable, "-m", "py.test", str(p2))
+        assert res.ret == 1