[Form] Fixed MoneyToLocalizedStringTransformer and added tests

src/Symfony/Component/Form/ValueTransformer/MoneyToLocalizedStringTransformer.php

@@ -41,11 +41,15 @@ class MoneyToLocalizedStringTransformer extends NumberToLocalizedStringTransform
      */
     public function transform($value)
     {
-        if (!is_numeric($value)) {
-            throw new \InvalidArgumentException(sprintf('Numeric argument expected, %s given', gettype($value)));
+        if ($value !== null) {
+            if (!is_numeric($value)) {
+                throw new \InvalidArgumentException(sprintf('Numeric argument expected, %s given', gettype($value)));
+            }
+
+            $value /= $this->getOption('divisor');
         }
 
-        return parent::transform($value / $this->getOption('divisor'));
+        return parent::transform($value);
     }
 
     /**
@@ -56,7 +60,13 @@ class MoneyToLocalizedStringTransformer extends NumberToLocalizedStringTransform
      */
     public function reverseTransform($value, $originalValue)
     {
-        return parent::reverseTransform($value) * $this->getOption('divisor');
+        $value = parent::reverseTransform($value, $originalValue);
+
+        if ($value !== null) {
+            $value *= $this->getOption('divisor');
+        }
+
+        return $value;
     }
 
 }

tests/Symfony/Tests/Component/Form/ValueTransformer/MoneyToLocalizedStringTransformerTest.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace Symfony\Tests\Component\Form\ValueTransformer;
+
+require_once __DIR__ . '/../LocalizedTestCase.php';
+
+use Symfony\Component\Form\ValueTransformer\MoneyToLocalizedStringTransformer;
+use Symfony\Tests\Component\Form\LocalizedTestCase;
+
+
+class MoneyToLocalizedStringTransformerTest extends LocalizedTestCase
+{
+    public function testTransform()
+    {
+        $transformer = new MoneyToLocalizedStringTransformer(array(
+            'divisor' => 100,
+        ));
+        $transformer->setLocale('de_AT');
+
+        $this->assertEquals('1,23', $transformer->transform(123));
+    }
+
+    public function testTransformThrowsExceptionIfNotNumeric()
+    {
+        $transformer = new MoneyToLocalizedStringTransformer(array(
+            'divisor' => 100,
+        ));
+
+        $this->setExpectedException('InvalidArgumentException');
+
+        $transformer->transform('abcd');
+    }
+
+    public function testTransform_empty()
+    {
+        $transformer = new MoneyToLocalizedStringTransformer();
+
+        $this->assertSame('', $transformer->transform(null));
+    }
+
+    public function testReverseTransform()
+    {
+        $transformer = new MoneyToLocalizedStringTransformer(array(
+            'divisor' => 100,
+        ));
+        $transformer->setLocale('de_AT');
+
+        $this->assertEquals(123, $transformer->reverseTransform('1,23', null));
+    }
+
+    public function testReverseTransform_empty()
+    {
+        $transformer = new MoneyToLocalizedStringTransformer();
+
+        $this->assertSame(null, $transformer->reverseTransform('', null));
+    }
+}