add a test that provokes a compile time error on windows

test/unittest/CMakeLists.txt

@@ -16,6 +16,7 @@ set(UNITTEST_SOURCES
     jsoncheckertest.cpp
     namespacetest.cpp
     pointertest.cpp
+    platformtest.cpp
     prettywritertest.cpp
     ostreamwrappertest.cpp
     readertest.cpp

test/unittest/platformtest.cpp

@@ -0,0 +1,37 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2021 THL A29 Limited, a Tencent company, and Milo Yip.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// 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.
+
+#include "unittest.h"
+
+// see https://github.com/Tencent/rapidjson/issues/1448
+// including windows.h on purpose to provoke a compile time problem as GetObject is a 
+// macro that gets defined when windows.h is included
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+#include "rapidjson/document.h"
+
+using namespace rapidjson;
+
+TEST(Platform, GetObject) {
+    Document doc;
+    doc.Parse(" { \"object\" : { \"pi\": 3.1416} } ");
+    EXPECT_TRUE(doc.IsObject());
+    EXPECT_TRUE(doc.HasMember("object"));
+    const Document::ValueType& o = doc["object"];
+    EXPECT_TRUE(o.IsObject());
+    auto sub = o.GetObject();
+    EXPECT_TRUE(sub.HasMember("pi"));
+}