Make tests more informative (#372)

* Make tests more informative

* Change grpc status checks to warning instead of fatal

test/microbenchmarks.py

@@ -6,12 +6,18 @@ import numpy as np
 
 import test_functions
 
-class MicroBenchmarkTest(unittest.TestCase):
+class TestMicroBenchmarks(unittest.TestCase):
 
-  def testTiming(self):
+  @classmethod
+  def setUpClass(cls):
     reload(test_functions)
     ray.init(start_ray_local=True, num_workers=3)
 
+  @classmethod
+  def tearDownClass(cls):
+    ray.worker.cleanup()
+
+  def test_timing(self):
     # measure the time required to submit a remote task to the scheduler
     elapsed_times = []
     for _ in range(1000):
@@ -77,7 +83,5 @@ class MicroBenchmarkTest(unittest.TestCase):
     print "    worst:           {}".format(elapsed_times[999])
     # average_elapsed_time should be about 0.00087
 
-    ray.worker.cleanup()
-
 if __name__ == "__main__":
-    unittest.main()
+    unittest.main(verbosity=2)