add static_mode_white_list (#28112)

* add static_mode_white_list

* add Mac CI static list

* add Win CI white_list

* add Coverage and Py3 CI white_list, add test_unittest

python/paddle/fluid/tests/unittests/test_dygraph_mode_of_unittest.py

@@ -0,0 +1,29 @@
+#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import print_function
+
+import unittest
+import paddle
+
+
+class TestDygraphModeOfUnittest(unittest.TestCase):
+    def test_dygraph_mode(self):
+        self.assertTrue(paddle.in_dynamic_mode(
+        ), 'Default Mode of Unittest should be dygraph mode, but get static mode.'
+                        )
+
+
+if __name__ == '__main__':
+    unittest.main()