Refined the debugging

test/index.js

@@ -0,0 +1,23 @@
+//the library to test
+const sineQL = require('../source/index.js');
+
+//the dummy values
+const schema = `
+scalar Date
+
+type Book {
+	String title
+	Date published
+}
+
+type Author {
+	String name
+	Book books
+}
+`;
+
+const handler = null;
+
+//run the function in debug mode (builds type graph)
+const sine = sineQL(schema, handler, { debug: true });
+