public void TestEmptyField() { Passphrase zero = Passphrase.Empty; Passphrase nonzero = new Passphrase("something"); Assert.That(zero.Equals(Passphrase.Empty)); Assert.That(zero.Thumbprint, Is.EqualTo(Passphrase.Empty.Thumbprint)); Assert.That(!nonzero.Equals(Passphrase.Empty)); Assert.That(nonzero.Thumbprint, Is.Not.EqualTo(Passphrase.Empty.Thumbprint)); }