fix mutant

test/index.js

@@ -5,18 +5,43 @@
  * Created by Timo Hocker <timo@scode.ovh>, March 2020
  */
 
+/* eslint-disable no-magic-numbers */
+
 'use strict';
 
 const helper = require ('../index');
+const argon2 = require ('argon2');
 const test = require ('ava');
+const encoding_helper = require ('@scode/encoding-helper');
+
+const required_options = {
+  hashLength: 64,
+  saltLength: 32,
+  type:       argon2.argon2id
+};
+const type_str = 'argon2id';
 
 test ('create hash', async (t) => {
   const hash = await helper.hash ('foo');
+  const regex = /\$(?<type>.*?)\$.*?\$.*?\$(?<salt>.*?)\$(?<hash>.*)/u;
+  const res = regex.exec (hash);
   t.is (typeof hash, 'string');
+  t.not (res, null);
+  t.is (res.groups.type, type_str);
+  t.is (
+    encoding_helper.to_hex (res.groups.salt, 'base64').length,
+    required_options.saltLength * 2
+  );
+  t.is (
+    encoding_helper.to_hex (res.groups.hash, 'base64').length,
+    required_options.hashLength * 2
+  );
+  t.is (await argon2.verify (hash, 'foo', required_options), true);
 });
 
 test ('validate', async (t) => {
-  const hash = await helper.hash ('foo');
+  // eslint-disable-next-line max-len
+  const hash = '$argon2id$v=19$m=4096,t=3,p=1$IxY4EsXRazKmYijrGMEKap6MWeSjVaBIKykCu2fzNwg$ffJ4aOJTITnakX5NXVTAVvQZFIrj47mKVDuqcStu6uw1Ouo0LfILHP9z3beaZscGGR5BXJZhUFlXSsdsi/4pOg';
   const valid = await helper.verify (hash, 'foo');
   t.is (valid, true);
 });