diff --git a/test/test-des48.js b/test/test-des48.js
new file mode 100644
index 0000000..c1fa022
--- /dev/null
+++ b/test/test-des48.js
@@ -0,0 +1,12 @@
+var key=[];for(var i=0;i<64;i++) key[i]=i%2;
+// console.log(key,
+var CKS=des48.des_OWsetkey(key);
+for (var i=0;i<16;i++) {
+  var ck='';
+  for (var j=0;j<48;j++) {
+    ck=ck+String(CKS.KS[i][j])
+  }
+  console.log(ck)
+}
+var block=[]; for(var i=0;i<48;i++) block[i]=0;
+console.log(des48.des_OWcrypt48(block).join(' , '))