public void CreateSigningKey()
{
var signer = new AwsSigner();
var config = Helpers.CreateExampleConfig();
const string expected = "c4afb1cc5771d871763a393e44b703571b55cc28424d1a5e86da6ed3c154a4b9";
var dateTime = DateTimeOffset.Parse("2015-08-30T12:36:00Z");
var result = signer.CreateSigningKey(config.Secret, dateTime, config.Region, config.Service);
// Convert the result to hex string just to compare
// In the actual world this stays a byte array
Assert.AreEqual(expected, signer.ToHexString(result), "Create signing key failed");
}