Added at()

tests/Stringy/CommonTest.php

@@ -546,6 +546,22 @@ class CommonTest extends PHPUnit_Framework_TestCase
         return $testData;
     }
 
+    public function stringsForAt()
+    {
+        $testData = array(
+            array('f', 'foo bar', 0),
+            array('o', 'foo bar', 1),
+            array('r', 'foo bar', 6),
+            array('', 'foo bar', 7),
+            array('f', 'fòô bàř', 0, 'UTF-8'),
+            array('ò', 'fòô bàř', 1, 'UTF-8'),
+            array('ř', 'fòô bàř', 6, 'UTF-8'),
+            array('', 'fòô bàř', 7, 'UTF-8'),
+        );
+
+        return $testData;
+    }
+
     // A test is required so as not to throw an error
     // This is a lot cleaner than using PHPUnit's mocks to spy
     public function test() {

tests/Stringy/StaticStringyTest.php

@@ -317,4 +317,13 @@ class StaticStringyTestCase extends CommonTest
         $result = S::substr($str, $start, $length, $encoding);
         $this->assertEquals($expected, $result);
     }
+
+    /**
+     * @dataProvider stringsForAt
+     */
+    public function testAt($expected, $str, $index, $encoding = null)
+    {
+        $result = S::at($str, $index, $encoding);
+        $this->assertEquals($expected, $result);
+    }
 }

tests/Stringy/StringyTest.php

@@ -309,4 +309,13 @@ class StringyTestCase extends CommonTest
         $result = S::create($str, $encoding)->substr($start, $length);
         $this->assertEquals($expected, $result);
     }
+
+    /**
+     * @dataProvider stringsForAt
+     */
+    public function testAt($expected, $str, $index, $encoding = null)
+    {
+        $result = S::create($str, $encoding)->at($index);
+        $this->assertEquals($expected, $result);
+    }
 }