Throw InvalidSelectorException instead of InvalidArgumentException when selector is empty

Author: Imangazaliev

src/DiDom/Query.php

@@ -387,15 +387,14 @@ protected static function convertContains($string, $caseSensetive = false)
      *
      * @return array
      *
-     * @throws \InvalidArgumentException if an empty string is passed
-     * @throws \InvalidSelectorException if the selector is not valid
+     * @throws \InvalidSelectorException if the selector is empty or not valid
      */
     public static function getSegments($selector)
     {
         $selector = trim($selector);
 
         if ($selector === '') {
-            throw new InvalidArgumentException('The selector must not be empty');
+            throw new InvalidSelectorException('The selector must not be empty');
         }
 
         $tag = '(?P<tag>[\*|\w|\-]+)?';

tests/DiDom/QueryTest.php

@@ -40,7 +40,15 @@ public function testBuildXpathWithEmptyArray()
     }
 
     /**
-     * @expectedException InvalidArgumentException
+     * @expectedException DiDom\Exceptions\InvalidSelectorException
+     */
+    public function testCompileWithEmptySelector()
+    {
+        Query::compile('');
+    }
+
+    /**
+     * @expectedException DiDom\Exceptions\InvalidSelectorException
      */
     public function testGetSegmentsWithEmptySelector()
     {