public function testConvertToStorageValue()
{
$convMock = $this->getMock('eZ\\Publish\\Core\\Persistence\\Legacy\\Content\\FieldValue\\Converter');
$convMock->expects($this->once())->method('toStorageValue')->with($this->isInstanceOf('eZ\\Publish\\SPI\\Persistence\\Content\\FieldValue'), $this->isInstanceOf('eZ\\Publish\\Core\\Persistence\\Legacy\\Content\\StorageFieldValue'))->will($this->returnValue(new StorageFieldValue()));
$reg = new Registry(array('some-type' => $convMock));
$field = new Field();
$field->type = 'some-type';
$field->value = new FieldValue();
$mapper = new Mapper($reg, $this->getLanguageHandler());
$res = $mapper->convertToStorageValue($field);
$this->assertInstanceOf('eZ\\Publish\\Core\\Persistence\\Legacy\\Content\\StorageFieldValue', $res);
}