[Form] replaced UnexpectedValueException by InvalidArgumentException in Guess

this is a better fit because the error is a logic exception instead of a runtime exception

src/Symfony/Component/Form/Guess/Guess.php

@@ -97,12 +97,12 @@ abstract class Guess
      *
      * @param integer $confidence The confidence
      *
-     * @throws \UnexpectedValueException if the given value of confidence is unknown
+     * @throws \InvalidArgumentException if the given value of confidence is unknown
      */
     public function __construct($confidence)
     {
         if (!in_array($confidence, self::$confidences)) {
-            throw new \UnexpectedValueException(sprintf('The confidence should be one of "%s"', implode('", "', self::$confidences)));
+            throw new \InvalidArgumentException(sprintf('The confidence should be one of "%s"', implode('", "', self::$confidences)));
         }
 
         $this->confidence = $confidence;

src/Symfony/Component/Form/Tests/Guess/GuessTest.php

@@ -27,7 +27,7 @@ class GuessTest extends \PHPUnit_Framework_TestCase
     }
 
     /**
-     * @expectedException \UnexpectedValueException
+     * @expectedException \InvalidArgumentException
      */
     public function testGuessExpectsValidConfidence()
     {