Added a test of an empty hashtable

JsonGeneratorTests/JsonHashTable.h

@@ -0,0 +1,38 @@
+/*
+ * Arduino JSON library
+ * Benoit Blanchon 2014 - MIT License
+ */
+
+#pragma once
+
+#include "JsonObjectBase.h"
+
+template<int N>
+class JsonHashTable : public JsonObjectBase
+{
+public:
+
+    using JsonObjectBase::writeTo;
+
+private:
+
+   /* struct KeyValuePair
+    {
+        const char* key;
+        ObjectContainer value;
+    };*/
+
+    virtual void writeTo(StringBuilder& sb)
+    {
+        sb.append("{");
+
+        /*for (int i = 0; i < itemCount; i++)
+        {
+            if (i>0) sb.append(",");
+            writeObjectTo(items[i], sb);
+        }*/
+
+        sb.append("}");
+    }
+};
+