Make zope.interface optional for tests too.

src/gevent/testing/__init__.py

@@ -145,3 +145,18 @@ except ImportError: # Python 2
                 return unittest.skip(reason)
 
 mock = mock
+
+
+# zope.interface
+try:
+    from zope.interface import verify
+except ImportError:
+    class verify(object):
+
+        @staticmethod
+        def verifyObject(*_):
+            import warnings
+            warnings.warn("zope.interface is not installed; not verifying")
+            return
+
+verify = verify

src/gevent/testing/skipping.py

@@ -146,7 +146,7 @@ def skipWithoutPSUtil(reason):
                 # Python 2
                 pass
             test_item = SkipWrapper
-            print(test_item.mro())
+
         return test_item
     return decorator
 

src/gevent/tests/test___monitor.py

@@ -10,8 +10,8 @@ from greenlet import settrace
 from gevent.monkey import get_original
 from gevent._compat import thread_mod_name
 from gevent._compat import NativeStrIO
-from gevent._compat import get_this_psutil_process
 
+from gevent.testing import verify
 from gevent.testing.skipping import skipWithoutPSUtil
 
 from gevent import _monitor as monitor
@@ -247,7 +247,6 @@ class TestPeriodicMonitorBlocking(_AbstractTestPeriodicMonitoringThread,
         # so nothing is considered blocked
         from gevent.events import subscribers
         from gevent.events import IEventLoopBlocked
-        from zope.interface.verify import verifyObject
         events = []
         subscribers.append(events.append)
 
@@ -265,7 +264,7 @@ class TestPeriodicMonitorBlocking(_AbstractTestPeriodicMonitoringThread,
         # Again without switching is a problem.
         self.assertTrue(self.pmt.monitor_blocking(self.hub))
         self.assertTrue(events)
-        verifyObject(IEventLoopBlocked, events[0])
+        verify.verifyObject(IEventLoopBlocked, events[0])
         del events[:]
 
         # But we can order it not to be a problem

src/gevent/tests/test__events.py

@@ -8,8 +8,19 @@ from __future__ import print_function
 import unittest
 
 from gevent import events
-from zope.interface import verify
 
+try:
+    from zope.interface import verify
+except ImportError:
+    verify = None
+
+try:
+    from zope import event
+except ImportError:
+    event = None
+
+
+@unittest.skipIf(verify is None, "Needs zope.interface")
 class TestImplements(unittest.TestCase):
 
     def test_event_loop_blocked(self):
@@ -28,10 +39,10 @@ class TestImplements(unittest.TestCase):
                             events.MemoryUsageUnderThreshold(0, 0, 0, 0))
 
 
+@unittest.skipIf(event is None, "Needs zope.event")
 class TestEvents(unittest.TestCase):
 
     def test_is_zope(self):
-        from zope import event
         self.assertIs(events.subscribers, event.subscribers)
         self.assertIs(events.notify, event.notify)
 

src/gevent/tests/test__hub.py

@@ -329,7 +329,7 @@ class TestPeriodicMonitoringThread(greentest.TestCase):
 class TestLoopInterface(unittest.TestCase):
 
     def test_implemensts_ILoop(self):
-        from zope.interface import verify
+        from gevent.testing import verify
         from gevent._interfaces import ILoop
 
         loop = get_hub().loop

src/gevent/tests/test__monkey.py

@@ -70,7 +70,7 @@ class TestMonkey(SubscriberCleanupMixin, unittest.TestCase):
 
     def test_patch_twice_warnings_events(self):
         import warnings
-        from zope.interface import verify
+        from gevent.testing import verify
 
         orig_saved = {}
         for k, v in monkey.saved.items():