/**
* Test set pem file for connection
*/
public function testPem()
{
$config = $this->getMockBuilder('Deployer\\Server\\Configuration')->disableOriginalConstructor()->getMock();
$env = $this->getMock('Deployer\\Server\\Environment');
$config->expects($this->once())->method('setAuthenticationMethod')->with(Configuration::AUTH_BY_PEM_FILE)->will($this->returnSelf());
$config->expects($this->once())->method('setPemFile')->with('~/.pem')->will($this->returnSelf());
$b = new Builder($config, $env);
$b->pemFile('~/.pem');
}