Test empty object serialization

tests/JsonObjectSerializationTests.cpp

@@ -0,0 +1,30 @@
+#include <gtest/gtest.h>
+#include <JsonObject.h>
+#include <StaticJsonBuffer.h>
+
+class JsonObjectSerializationTests : public testing::Test
+{
+protected:
+    virtual void SetUp()
+    {
+        object = json.createObject();
+    }
+
+    void jsonMustBe(const char* expected)
+    {        
+        char actual[256];
+        object.serialize(actual, sizeof(actual));
+
+        EXPECT_STREQ(expected, actual);
+    }
+
+    JsonObject object;
+
+private:
+    StaticJsonBuffer<42> json;
+};
+
+TEST_F(JsonObjectSerializationTests, EmptyObject)
+{
+    jsonMustBe("{}");
+}