public function testFilter()
{
$data = array(0, 1, 'a', true, false, null, '');
// default = Hash::filter
$this->assertEquals(array_values(Pluck::filter($data)), array(0, 1, 'a', true));
$this->assertEquals(array_values(Pluck::filter($data, null)), array(0, 1, 'a', true));
$this->assertEquals(array_values(Pluck::filter($data, 0)), array(0, 1, 'a', true));
// true = strip 0
$this->assertEquals(array_values(Pluck::filter($data, true)), array(1, 'a', true));
// false = strip nothing
$this->assertEquals(Pluck::filter($data, false), $data);
// custom = strip 0
$this->assertEquals(array_values(Pluck::filter($data, array('Pluck', '_filterExcludeNull'))), array(0, 1, 'a', true, false, ''));
}
