add test__nochild.py

greentest/test__nochild.py

+import gevent.core
+import unittest
+
+class Test(unittest.TestCase):
+
+    if hasattr(gevent.core, 'child'):
+
+        def test(self):
+            loop = gevent.core.loop('nochild', default=True)
+            self.assertRaises(TypeError, loop.child, 1)
+
+            loop = gevent.core.loop(default=False)
+            self.assertRaises(TypeError, loop.child, 1)
+
+
+if __name__ == '__main__':
+    unittest.main()