public function test_getColumns_shouldNotConvertNullValuesToFalse()
{
$this->row->setColumns(array('nb_visits' => null, 'label' => 'Test', 'closure' => function () {
return null;
}, 'boolean' => false));
$expected = array('nb_visits' => null, 'label' => 'Test', 'closure' => null, 'boolean' => false);
$this->assertSame($expected, $this->row->getColumns());
}