public function testImmutability()
{
$pullRequests = new PullRequests();
$pullRequest = PullRequest::fromArray(['title' => 'a', 'repositoryName' => 'foo/bar', 'url' => 'http://www.example.com/', 'loneliness' => 42]);
$newPullRequests = $pullRequests->add($pullRequest);
$anotherPullRequests = $pullRequests->add($pullRequest);
$this->assertNotSame($pullRequest, $newPullRequests);
$this->assertNotSame($pullRequest, $anotherPullRequests);
$this->assertNotSame($newPullRequests, $anotherPullRequests);
$this->assertEquals($newPullRequests, $anotherPullRequests);
}
/**
* @param PullRequest $pullRequest
*
* @return PullRequests
*/
public function add(PullRequest $pullRequest)
{
$this->pullRequests = $this->pullRequests->add($pullRequest);
}