public function testResolveServer()
{
$this->assertSame("https://acme-v01.api.letsencrypt.org/directory", resolveServer("letsencrypt"));
$this->assertSame("https://acme-v01.api.letsencrypt.org/directory", resolveServer("letsencrypt:production"));
$this->assertSame("https://acme-staging.api.letsencrypt.org/directory", resolveServer("letsencrypt:staging"));
$this->assertSame("https://acme-v01.api.letsencrypt.org/directory", resolveServer("acme-v01.api.letsencrypt.org/directory"));
$this->assertSame("https://acme-v01.api.letsencrypt.org/directory", resolveServer("https://acme-v01.api.letsencrypt.org/directory"));
}