add strict str_is

Author: fey

src/Illuminate/Support/Str.php

@@ -251,7 +251,7 @@ public static function is($pattern, $value)
             // If the given value is an exact match we can of course return true right
             // from the beginning. Otherwise, we will translate asterisks and do an
             // actual pattern match against the two strings to see if they match.
-            if ($pattern == $value) {
+            if ($pattern === $value) {
                 return true;
             }
 

tests/Support/SupportStrTest.php

@@ -264,6 +264,10 @@ public function testIs()
 
         // empty patterns
         $this->assertFalse(Str::is([], 'test'));
+
+        $this->assertFalse( Str::is('', 0));
+        $this->assertFalse( Str::is([null], 0));
+        $this->assertTrue( Str::is([null], null));
     }
 
     /**