diff --git a/extramath-test.js b/extramath-test.js
new file mode 100644
index 0000000..a20296b
--- /dev/null
+++ b/extramath-test.js
@@ -0,0 +1,19 @@
+var ExtraMath = require("lib/extramath");
+
+function main(args) {
+	var a = "this is an apple";
+	var b = "this is red apple";
+	
+	var dtm = new ExtraMath.DTM();
+	dtm.add(a);
+	dtm.add(b);
+	var mat = dtm.toArray();
+
+	console.log(mat[0].join(' '));
+	console.log(mat[1].join(' '));
+
+	console.log(String(ExtraMath.cos(mat[0], mat[1])));
+	console.log(String(ExtraMath.measureSimilarity(a, b)));
+}
+
+exports.main = main;