public function testGetTypeOfField()
{
$cmi = new ClassMetadata('Doctrine\\Tests\\ODM\\PHPCR\\Mapping\\Person');
$cmi->initializeReflection(new RuntimeReflectionService());
$this->assertEquals(null, $cmi->getTypeOfField('some_field'));
$cmi->mappings['some_field'] = array('type' => 'some_type');
$this->assertEquals('some_type', $cmi->getTypeOfField('some_field'));
}