/**
* setting and retrieving owner group of a file
*
* @test
* @group permissions
*/
public function group()
{
$this->assertEquals(vfsStream::getCurrentGroup(), $this->dir->getGroup());
$this->assertTrue($this->dir->isOwnedByGroup(vfsStream::getCurrentGroup()));
$this->assertSame($this->dir, $this->dir->chgrp(vfsStream::GROUP_USER_1));
$this->assertEquals(vfsStream::GROUP_USER_1, $this->dir->getGroup());
$this->assertTrue($this->dir->isOwnedByGroup(vfsStream::GROUP_USER_1));
}