public function testChangeRole()
{
$this->Shell = new UsersShell($this->io);
$this->Shell->Users = $this->Users;
$user = $this->Users->get('00000000-0000-0000-0000-000000000001');
$this->assertSame('admin', $user['role']);
$this->Shell->runCommand(['changeRole', 'user-1', 'another-role']);
$user = $this->Users->get('00000000-0000-0000-0000-000000000001');
$this->assertSame('another-role', $user['role']);
}