add async timeout

Author: alimanfoo

zarr/tests/test_sync.py

@@ -88,7 +88,7 @@ def test_parallel_setitem(self):
 
         # parallel setitem
         results = pool.map_async(_set_arange, zip([arr] * n, range(n)))
-        print(results.get())
+        print(results.get(20))
 
         assert_array_equal(np.arange(n * 1000), arr[:])
 
@@ -102,7 +102,7 @@ def test_parallel_append(self):
 
         # parallel append
         results = pool.map_async(_append, zip([arr] * n, range(n)))
-        print(results.get())
+        print(results.get(20))
 
         eq(((n+1)*1000,), arr.shape)
 
@@ -188,7 +188,7 @@ def test_parallel_create_group(self):
         n = 1000
         results = pool.map_async(
             _create_group, zip([g] * n, [str(i) for i in range(n)]))
-        print(results.get())
+        print(results.get(20))
 
         eq(n, len(g))
 
@@ -202,7 +202,7 @@ def test_parallel_require_group(self):
         n = 1000
         results = pool.map_async(
             _require_group, zip([g] * n, [str(i//10) for i in range(n)]))
-        print(results.get())
+        print(results.get(20))
 
         eq(n//10, len(g))