add test_hub_join_timeout.py

greentest/test_hub_join_timeout.py

+import gevent
+from time import time
+
+
+SMALL = 0.1
+FUZZY = SMALL / 2
+
+
+for _a in xrange(2):
+
+    for _b in xrange(2):
+        gevent.spawn_later(SMALL, lambda: 5)
+        start = time()
+        result = gevent.get_hub().join(timeout=10)
+        assert result is True, repr(result)
+        delay = time() - start
+        assert SMALL - FUZZY <= delay <= SMALL + FUZZY, delay
+
+    for _c in xrange(2):
+        gevent.spawn_later(10, lambda: 5)
+        start = time()
+        result = gevent.get_hub().join(timeout=SMALL)
+        assert result is None, repr(result)
+        delay = time() - start
+        assert SMALL - FUZZY <= delay <= SMALL + FUZZY, delay