[Form] Implemented checks to assert that values and indices generated…

… in choice lists match their requirements

src/Symfony/Component/Form/Extension/Core/ChoiceList/ChoiceList.php

@@ -11,8 +11,10 @@
 
 namespace Symfony\Component\Form\Extension\Core\ChoiceList;
 
+use Symfony\Component\Form\Form;
 use Symfony\Component\Form\Util\FormUtil;
 use Symfony\Component\Form\Exception\UnexpectedTypeException;
+use Symfony\Component\Form\Exception\InvalidConfigurationException;
 use Symfony\Component\Form\Extension\Core\View\ChoiceView;
 
 /**
@@ -429,8 +431,18 @@ protected function addChoice(&$bucketForPreferred, &$bucketForRemaining, $choice
     {
         $index = $this->createIndex($choice);
 
+        if ('' === $index || null === $index || !Form::isValidName((string)$index)) {
+            throw new InvalidConfigurationException('The choice list index "' . $index . '" is invalid. Please set the choice field option "index_generation" to ChoiceList::GENERATE.');
+        }
+
+        $value = $this->createValue($choice);
+
+        if (!is_scalar($value)) {
+            throw new InvalidConfigurationException('The choice list value of type "' . gettype($value) . '" should be a scalar. Please set the choice field option "value_generation" to ChoiceList::GENERATE.');
+        }
+
         // Always store values as strings to facilitate comparisons
-        $value = $this->fixValue($this->createValue($choice));
+        $value = $this->fixValue($value);
         $view = new ChoiceView($value, $label);
 
         $this->choices[$index] = $this->fixChoice($choice);

src/Symfony/Component/Form/Form.php

@@ -1063,14 +1063,8 @@ private function clientToNorm($value)
     /**
      * Validates whether the given variable is a valid form name.
      *
-     * A name is accepted if it
-     *
-     *   * is empty
-     *   * starts with a letter, digit or underscore
-     *   * contains only letters, digits, numbers, underscores ("_"),
-     *     hyphens ("-") and colons (":")
-     *
      * @param string $name The tested form name.
+     *
      * @throws UnexpectedTypeException If the name is not a string.
      * @throws \InvalidArgumentException If the name contains invalid characters.
      */
@@ -1080,11 +1074,30 @@ static public function validateName($name)
             throw new UnexpectedTypeException($name, 'string');
         }
 
-        if ($name !== '' && !preg_match('/^[a-zA-Z0-9_][a-zA-Z0-9_\-:]*$/D', $name)) {
+        if (!self::isValidName($name)) {
             throw new \InvalidArgumentException(sprintf(
                 'The name "%s" contains illegal characters. Names should start with a letter, digit or underscore and only contains letters, digits, numbers, underscores ("_"), hyphens ("-") and colons (":").',
                 $name
             ));
         }
     }
+
+    /**
+     * Returns whether the given variable contains a valid form name.
+     *
+     * A name is accepted if it
+     *
+     *   * is empty
+     *   * starts with a letter, digit or underscore
+     *   * contains only letters, digits, numbers, underscores ("_"),
+     *     hyphens ("-") and colons (":")
+     *
+     * @param string $name The tested form name.
+     *
+     * @return Boolean Whether the name is valid.
+     */
+    static public function isValidName($name)
+    {
+        return $name === '' || preg_match('/^[a-zA-Z0-9_][a-zA-Z0-9_\-:]*$/D', $name);
+    }
 }

tests/Symfony/Tests/Component/Form/Extension/Core/ChoiceList/ChoiceListTest.php

@@ -87,6 +87,34 @@ public function testInitNestedArray()
         ), $this->list->getRemainingViews());
     }
 
+    /**
+     * @expectedException Symfony\Component\Form\Exception\InvalidConfigurationException
+     */
+    public function testInitIndexCopyChoiceWithInvalidIndex()
+    {
+        new ChoiceList(
+            array('a.'),
+            array('A'),
+            array(),
+            ChoiceList::GENERATE,
+            ChoiceList::COPY_CHOICE
+        );
+    }
+
+    /**
+     * @expectedException Symfony\Component\Form\Exception\InvalidConfigurationException
+     */
+    public function testInitValueCopyChoiceWithInvalidValue()
+    {
+        new ChoiceList(
+            array($this->obj1),
+            array('A'),
+            array(),
+            ChoiceList::COPY_CHOICE,
+            ChoiceList::GENERATE
+        );
+    }
+
     public function testGetIndicesForChoices()
     {
         $choices = array($this->obj2, $this->obj3);