Add teardown_module to test_queue.py (#4012)

Author: williamma12

python/ray/test/test_queue.py

@@ -2,32 +2,35 @@
 from __future__ import division
 from __future__ import print_function
 
-import time
 import pytest
+import time
 
 import ray
-
 from ray.experimental.queue import Queue, Empty, Full
 
 
-def setup_module():
-    if not ray.worker.global_worker.connected:
-        ray.init()
-
+@pytest.fixture
+def ray_start():
+    # Start the Ray process.
+    ray.init(num_cpus=1)
+    yield None
+    # The code after the yield will run as teardown code.
+    ray.shutdown()
 
-@ray.remote
-def get_async(queue, block, timeout, sleep):
-    time.sleep(sleep)
-    return queue.get(block, timeout)
 
+def test_queue(ray_start):
+    @ray.remote
+    def get_async(queue, block, timeout, sleep):
+        time.sleep(sleep)
+        return queue.get(block, timeout)
 
-@ray.remote
-def put_async(queue, item, block, timeout, sleep):
-    time.sleep(sleep)
-    queue.put(item, block, timeout)
+    @ray.remote
+    def put_async(queue, item, block, timeout, sleep):
+        time.sleep(sleep)
+        queue.put(item, block, timeout)
 
+    # Test simple usage.
 
-def test_simple_use():
     q = Queue()
 
     items = list(range(10))
@@ -38,8 +41,8 @@ def test_simple_use():
     for item in items:
         assert item == q.get()
 
+    # Test asynchronous usage.
 
-def test_async():
     q = Queue()
 
     items = set(range(10))
@@ -52,8 +55,8 @@ def test_async():
 
     assert items == result
 
+    # Test put.
 
-def test_put():
     q = Queue(1)
 
     item = 0
@@ -82,8 +85,8 @@ def test_put():
 
     assert ray.get(get_id) == 1
 
+    # Test get.
 
-def test_get():
     q = Queue()
 
     item = 0
@@ -107,8 +110,8 @@ def test_get():
     put_async.remote(q, item, True, None, 0.2)
     assert q.get() == item
 
+    # Test qsize.
 
-def test_qsize():
     q = Queue()
 
     items = list(range(10))