public void returns_correct_issuer_when_one_registered()
{
string issuerName = "testIssuer";
var issuer = new IssuerInformation(issuerName, new NullSignatureAlgorithm());
_signatureProvider.Register(issuer);
Assert.AreSame(issuer, _signatureProvider.GetIssuer(issuerName),
"Incorrect issuer returned");
}