Add tests for Writer API for RAPIDJSON_HAS_STDSTRING

include/rapidjson/prettywriter.h

@@ -78,7 +78,7 @@ public:
 
 #if RAPIDJSON_HAS_STDSTRING
     bool String(const std::basic_string<Ch>& str) {
-      return String(str.data(), SizeType(str.size()));
+        return String(str.data(), SizeType(str.size()));
     }
 #endif
 

include/rapidjson/writer.h

@@ -127,7 +127,7 @@ public:
 
 #if RAPIDJSON_HAS_STDSTRING
     bool String(const std::basic_string<Ch>& str) {
-      return String(str.data(), SizeType(str.size()));
+        return String(str.data(), SizeType(str.size()));
     }
 #endif
 

test/unittest/prettywritertest.cpp

@@ -79,3 +79,14 @@ TEST(PrettyWriter, SetIndent) {
         "}",
         buffer.GetString());
 }
+
+#if RAPIDJSON_HAS_STDSTRING
+TEST(PrettyWriter, String_STDSTRING) {
+    StringBuffer buffer;
+    PrettyWriter<StringBuffer> writer(buffer);
+    EXPECT_TRUE(writer.StartArray());
+    EXPECT_TRUE(writer.String(std::string("Hello\n")));
+    EXPECT_TRUE(writer.EndArray());
+    EXPECT_STREQ("[\n    \"Hello\\n\"\n]", buffer.GetString());
+}
+#endif

test/unittest/writertest.cpp

@@ -89,6 +89,15 @@ TEST(Writer, String) {
     TEST_ROUNDTRIP("[\"Hello\"]");
     TEST_ROUNDTRIP("[\"Hello\\u0000World\"]");
     TEST_ROUNDTRIP("[\"\\\"\\\\/\\b\\f\\n\\r\\t\"]");
+
+#if RAPIDJSON_HAS_STDSTRING
+    {
+        StringBuffer buffer;
+        Writer<StringBuffer> writer(buffer);
+        writer.String(std::string("Hello\n"));
+        EXPECT_STREQ("\"Hello\\n\"", buffer.GetString());
+    }
+#endif
 }
 
 TEST(Writer, Double) {