open deccorator test, test=develop (#25464)

python/paddle/reader/decorator.py

@@ -536,6 +536,10 @@ def multiprocess_reader(readers, use_pipe=True, queue_size=1000):
 
     """
 
+    if sys.platform == 'win32':
+        raise NotImplementedError(
+            "The multiprocess_reader method is not supported on windows.")
+
     try:
         import ujson as json
     except Exception as e:

python/paddle/reader/tests/CMakeLists.txt

@@ -1,4 +1 @@
-# TODO: Fix this unittest failed on Windows
-if(NOT WIN32)
 py_test(decorator_test SRCS decorator_test.py)
-endif()

python/paddle/reader/tests/decorator_test.py

@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import sys
 import time
 import unittest
 import functools
@@ -171,6 +172,7 @@ class TestMultiProcessReader(unittest.TestCase):
         self.assertEqual(sorted(self.samples), sorted(results))
 
     def test_distributed_batch_reader(self):
+        if sys.platform != 'win32':
             self.reader_test(use_pipe=False)
             self.reader_test(use_pipe=True)