add Affine cipher

[davidelettieri]

add affine cipher exercise, info for config file is taken from ruby project

[ErikSchierboom]

Thanks so much for doing this! It is already looking quite good! I've requested some small changes, and suggested a simplification of the generator code.

[ErikSchierboom]

There is quite a bit of customization going on here, and I think we can simplify things quite a bit. Let me explain!

Looking at the canonical data, the input data is straightforward, except for the "key" property, which is a nested property. You can work around this using the following code in the UpdateTestMethod method:

testMethod.Input["a"] = testMethod.Input["key"]["a"];
testMethod.Input["b"] = testMethod.Input["key"]["b"];
testMethod.InputParameters = new[] { "phrase", "a", "b" };

The second bit is dealing with exception, which is also easy to fix:

if (!(testMethod.Expected is string))
     testMethod.ExceptionThrown = typeof(ArgumentException);

With just these 5 lines of code, the generate becomes a lot simpler and still generates a nice test file. The only change you have to make in your example and stub files is make them use a static class with static methods.

[davidelettieri]

Generator is considerably better, we're missing check on exception message. Is there a simple way to do it?

[ErikSchierboom]

This is looking great! I've solved the solution conflict. When the CI is green, I'll merge!

[ErikSchierboom]

Merged, thanks a lot! 🎉

[davidelettieri]

Thanks to you :)