MSpec (Machine Specifications.NET) is a testing library that is based on Behavior Driven Development (BDD) techniques. The idea behind BDD is that given a certain context, because of given scenario, the software should work a certain way. Through better readability, specifications set forth by business stake holders and other concerned parties, can be directly translated into tests. MSpec is a .NET testing library that supports BDD-style tests.
Fluent Validation for .NET is a fluent-based library that allows us to separate the validation rules from our domain models. Because of this separation, we can achieve testability and reuse. Through it’s fluent interface, the validation rules become more readable.