public function testTransform() { $handler = new Handler($dataGrid = $this->getMockDataGrid()); $handler->setTransformer(function ($el) { $el['first_name'] = 'foobar'; return $el; }); $handler->hydrate(); $expected = $this->getValidatedData(); $this->assertCount(count($expected), $data = $handler->getResults()); foreach ($data as $item) { $this->assertEquals($item['first_name'], 'foobar'); } }