Test empty object serialization

tests/JsonValueTests.cpp

@@ -93,4 +93,16 @@ TEST_F(JsonValueTests, CharPointersAreCopied)
     jsonValue1 = "world";
 
     EXPECT_STREQ("hello", (const char*) jsonValue2);
+}
+
+TEST_F(JsonValueTests, ObjectPointsAreCopied)
+{
+    JsonObject object = json.createObject();
+
+    jsonValue1 = object;
+    jsonValue2 = jsonValue1;
+    
+    object["hello"] = "world";
+
+    EXPECT_EQ(1, ((JsonObject) jsonValue2).size());
 }