add test

.gitignore

@@ -1,2 +1,4 @@
 /node_modules/
 /dist/
+/.nyc_output/
+/coverage/

index.js

@@ -6,7 +6,7 @@
 /* eslint-disable no-magic-numbers */
 'use strict';
 
-const argon2 = require('argon2');
+const argon2 = require ('argon2');
 
 const argon_options = {
   hashLength: 64,
@@ -17,12 +17,12 @@ const argon_options = {
 /**
  * verify a plain text against an argon2 hash
  *
- * @param {string} hash argon hash
+ * @param {string} hash_str hash
  * @param {string} plain plain text
  * @returns {Promise<boolean>} true if valid
  */
-function argon_verify (hash, plain) {
+function verify (hash_str, plain) {
-  return argon2.verify (hash, plain, argon_options);
+  return argon2.verify (hash_str, plain, argon_options);
 }
 
 /**
@@ -31,11 +31,11 @@ function argon_verify (hash, plain) {
  * @param {string} plain plain text
  * @returns {Promise<string>} hash
  */
-function argon_hash (plain) {
+function hash (plain) {
   return argon2.hash (plain, argon_options);
 }
 
 module.exports = {
-  argon_hash,
+  hash,
-  argon_verify
+  verify
-}
+};

test/index.js

@@ -0,0 +1,21 @@
+'use strict';
+
+const helper = require ('../index');
+const test = require ('ava');
+
+test ('create hash', async (t) => {
+  const hash = await helper.hash ('foo');
+  t.is (typeof hash, 'string');
+});
+
+test ('validate', async (t) => {
+  const hash = await helper.hash ('foo');
+  const valid = await helper.verify (hash, 'foo');
+  t.is (valid, true);
+});
+
+test ('fail validation', async (t) => {
+  const hash = await helper.hash ('foo');
+  const valid = await helper.verify (hash, 'bar');
+  t.is (valid, false);
+});