setup.py: Sync moban

Related to https://gitlab.com/coala/mobans/merge_requests/3

setup.py

@@ -21,11 +21,24 @@
 
 
 class PyTestCommand(TestCommand):
+    """
+    From https://pytest.org/latest/goodpractices.html
+    """
+    user_options = [('pytest-args=', 'a', 'Arguments to pass to py.test')]
+
+    def initialize_options(self):
+        TestCommand.initialize_options(self)
+        self.pytest_args = []
+
+    def finalize_options(self):
+        TestCommand.finalize_options(self)
+        self.test_args = []
+        self.test_suite = True
 
     def run_tests(self):
         # import here, cause outside the eggs aren't loaded
         import pytest
-        errno = pytest.main([])
+        errno = pytest.main(self.pytest_args)
         sys.exit(errno)