public function testSearchColumns()
{
$this->engine->searchColumns('id');
$this->assertEquals(array('id'), $this->engine->getSearchingColumns());
$this->engine->searchColumns('name', 'email');
$this->assertEquals(array('name', 'email'), $this->engine->getSearchingColumns());
$this->engine->searchColumns(array('foo', 'bar'));
$this->assertEquals(array('foo', 'bar'), $this->engine->getSearchingColumns());
}
