Added unit tests for Str::limit and limit_words. Also fixed bug in limit with multibyte characters.

laravel/str.php

@@ -118,7 +118,7 @@ class Str {
 
 		if (function_exists('mb_substr'))
 		{
-			return mb_substr($value, 0, $length).$end;
+			return mb_substr($value, 0, $length, Config::get('application.encoding')).$end;
 		}
 
 		return substr($value, 0, $length).$end;

tests/Cases/StrTest.php

@@ -35,4 +35,17 @@ class StrTest extends PHPUnit_Framework_TestCase {
 	{
 		$this->assertEquals(5, strlen(Laravel\Str::random(5)));
 	}
+
+	public function test_limit()
+	{
+		$this->assertEquals('Thi...', Laravel\Str::limit('This is a string of text', 3, '...'));
+		$this->assertEquals('This is ', Laravel\Str::limit('This is a string of text', 7, ' '));
+		$this->assertEquals('τάχ', Laravel\Str::limit('τάχιστη', 3, ''));
+	}
+
+	public function test_limit_words()
+	{
+		$this->assertEquals('This is a...', Laravel\Str::limit_words('This is a string of text', 3, '...'));
+		$this->assertEquals('This is a string ', Laravel\Str::limit_words('This is a string of text', 4, ' '));
+	}
 }
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