public function testReplaceColumn() { $columnBag = with(new \mechanicious\Columnizer\Columnizer($this->mockData))->columnizeRowArray(); $tableman = new \mechanicious\Tableman\Tableman($columnBag); $tableman->replaceColumn(new Column(array('old', 'young'), 'approx_age'), 'age'); $this->assertEquals($tableman->get('age'), null); $this->assertEquals($tableman->get('approx_age')->first(), 'old'); }