public async Task GetMasterKeyCertificate_GivenRsaCertificate_ReturnsPrivateKeyBytes()
        {
            var options = new AnonymousTokensConfig
            {
                MasterKeyCertId = "key-id"
            };

            var eccCert = CertUtils.GenerateTestRsaCert();

            var automocker = new AutoMocker();

            automocker.SetupOptions(options);

            automocker
            .Setup <ICertificateLocator, Task <Option <X509Certificate2> > >(x => x.GetCertificateAsync("key-id"))
            .ReturnsAsync(eccCert.Some);

            var target = automocker.CreateInstance <AnonymousTokenMasterKeyLoader>();

            var result = await target.LoadMasterKeyBytes();

            result.Should().NotBeNullOrEmpty();
        }