public function testDeleteFields()
{
$this->insertDatabaseFixture(__DIR__ . '/../_fixtures/contentobjects.php');
$beforeCount = array('all' => $this->countContentFields(), 'this' => $this->countContentFields(4));
$gateway = $this->getDatabaseGateway();
$gateway->deleteFields(4);
$this->assertEquals(array('all' => $beforeCount['all'] - 2, 'this' => 0), array('all' => $this->countContentFields(), 'this' => $this->countContentFields(4)));
}