use localeCompare

index.js

@@ -1,12 +1,12 @@
 /*!
  * sort-asc <https://github.com/helpers/sort-asc>
  *
- * Copyright (c) 2014 Jon Schlinkert, contributors.
+ * Copyright (c) 2014-2015 Jon Schlinkert.
  * Licensed under the MIT License
  */
 
 'use strict';
 
 module.exports = function (a, b) {
-  return b < a ? -1 : 1;
+  return a === b ? 0 : a.localeCompare(b);
 };

test.js

@@ -1,18 +1,14 @@
-/*!
- * sort-asc <https://github.com/jonschlinkert/sort-asc>
- *
- * Copyright (c) 2014 Jon Schlinkert, contributors.
- * Licensed under the MIT License
- */
-
 'use strict';
 
 var assert = require('assert');
 var sortAsc = require('./');
 
-describe('sort object', function () {
-  it('should sort keys in ascending order.', function () {
-    var actual = (['a', 'b', 'c', 'd']).sort(sortAsc);
-    assert.deepEqual(actual, ['d', 'c', 'b', 'a']);
+describe('sort ascending', function () {
+  it('should sort elements in ascending order.', function () {
+    assert.deepEqual(['d', 'c', 'b', 'a'].sort(sortAsc), ['a', 'b', 'c', 'd']);
+    assert.deepEqual(['g', 'z', 'a', 'x'].sort(sortAsc), ['a', 'g', 'x', 'z']);
+    assert.deepEqual(['z', 'z', 'a', 'z'].sort(sortAsc), ['a', 'z', 'z', 'z']);
+    assert.deepEqual(['zz', 'z', 'aa', 'a'].sort(sortAsc), ['a', 'aa', 'z', 'zz']);
+    assert.deepEqual(['aba', 'aab', 'acc', 'abb', 'aabb'].sort(sortAsc), ['aab', 'aabb', 'aba', 'abb', 'acc']);
   });
 });