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diff --git a/test/unittest/namespacetest.cpp b/test/unittest/namespacetest.cpp
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+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// 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"
+
+// test another instantiation of RapidJSON in a different namespace 
+
+#define RAPIDJSON_NAMESPACE my::rapid::json
+#define RAPIDJSON_NAMESPACE_BEGIN namespace my { namespace rapid { namespace json {
+#define RAPIDJSON_NAMESPACE_END } } }
+
+// include lots of RapidJSON files
+
+#include "rapidjson/document.h"
+#include "rapidjson/writer.h"
+#include "rapidjson/filereadstream.h"
+#include "rapidjson/filewritestream.h"
+#include "rapidjson/encodedstream.h"
+#include "rapidjson/stringbuffer.h"
+
+static const char json[] = "{\"hello\":\"world\",\"t\":true,\"f\":false,\"n\":null,\"i\":123,\"pi\":3.1416,\"a\":[1,2,3,4]}";
+
+TEST(NamespaceTest,Using) {
+    using namespace RAPIDJSON_NAMESPACE;
+    typedef GenericDocument<UTF8<>, CrtAllocator> DocumentType;
+    DocumentType doc;
+
+    doc.Parse(json);
+    EXPECT_TRUE(!doc.HasParseError());
+}
+
+TEST(NamespaceTest,Direct) {
+    typedef RAPIDJSON_NAMESPACE::Document Document;
+    typedef RAPIDJSON_NAMESPACE::Reader Reader;
+    typedef RAPIDJSON_NAMESPACE::StringStream StringStream;
+    typedef RAPIDJSON_NAMESPACE::StringBuffer StringBuffer;
+    typedef RAPIDJSON_NAMESPACE::Writer<StringBuffer> WriterType;
+
+    StringStream s(json);
+    StringBuffer buffer;
+    WriterType writer(buffer);
+    buffer.ShrinkToFit();
+    Reader reader;
+    reader.Parse(s, writer);
+
+    EXPECT_STREQ(json, buffer.GetString());
+    EXPECT_EQ(sizeof(json)-1, buffer.GetSize());
+    EXPECT_TRUE(writer.IsComplete());
+
+    Document doc;
+    doc.Parse(buffer.GetString());
+    EXPECT_TRUE(!doc.HasParseError());
+
+    buffer.Clear();
+    writer.Reset(buffer);
+    doc.Accept(writer);
+    EXPECT_STREQ(json, buffer.GetString());
+    EXPECT_TRUE(writer.IsComplete());
+}