public function testappendStreamFilter() { $csv = new Reader(__DIR__ . '/foo.csv'); $csv->appendStreamFilter('string.toupper'); $csv->setFlags(SplFileObject::READ_AHEAD | SplFileObject::SKIP_EMPTY); foreach ($csv->getIterator() as $row) { $this->assertSame($row, ['JOHN', 'DOE', '*****@*****.**']); } }