Test that integers can be stored in a JsonObject

tests/JsonObjectTests.cpp

@@ -26,4 +26,17 @@ TEST(JsonObjectTests, WhenTheSameValueIsAddedTwice_ThenSizeIsOnlyIncreasedByOne)
 
     object["hello"];
     EXPECT_EQ(1, object.size());
+}
+
+TEST(JsonObjectTests, WhenAnIntegerIsStore_TheSameIntegerIsRetreived)
+{
+    StaticJsonBuffer<42> json;
+
+    JsonObject object = json.createObject();
+
+    object["hello"] = 123;
+    object["world"] = 456;
+
+    EXPECT_EQ(123, (int) object["hello"]);
+    EXPECT_EQ(456, (int) object["world"]);
 }