Project abandoned! This was a nice excercise but I decided to abandon it to try to focus on more useful libraries like Builder and Minded. Feel free to branch and reuse all or part of this code, and please contact me if you need help.
MSTest is the Microsoft Unit Testing library which does not requires third party frameworks. It has a decent amount of features and is quite mature but for for people like me that prefers a fluent approach in defining the expectations, it does not really offer anything.
I been using for years FluentAssertions, I love it and I think is the best library out there which allows you to fluently write test assertions.
The benefit of using fluency is that the reader is facilitated in understanding what is actually being asserted, tested.
An important thing I don't like about FluentAssertion is that you loose the highlight of where an assertion has been placed.
When you write:
var result = sut.Do();
result.Should().Be(ExpectedResult);
you don't have any visual indication that you are doing an assert, the style of your code shows plain colour and nothing really catches your eyes.
If you use Assert:
var result = sut.Do();
Assert.AreEqual(ExpectedResult, result);
the Assert class is highlighted and in complex tests (which you should not have, but we all do have), this simple highlight is helping you find all assertions.
That's why I decided to invest some of my time to leverage Assert.That property to extend MSTest adding flunt assertion extension methods, it is both fun and a good coding excercise.