Test cases for issue described in https://github.com/stleary/JSON-java/issues/410.

src/test/resources/jsonpointer-testdoc.json

@@ -19,6 +19,7 @@
 			"another/key" : [
 				"val"
 			]
-		}
+		},
+		"" : { "" : "empty key of an object with an empty key" }
 	}
 }