Unit testing and code coverage for ASP.NET Web API (2/2)

This post continues on Unit testing and code coverage for ASP.NET Web API (1/2).
Much about the topic is inspired from the truly magnificent book “The Clean Coder: A Code of Conduct for Professional Programmers” of Robert C. Martin Series, which of course, I definitely recommend.

Specifying the low level architecture

Professional software developers always test their code. It is part of our daily job, we should be proud and flexible on writing tests. It is a proof that our code actually follows our intent, at least on system’s low level. There are many more tests to be followed, composing a testing strategy, but this post is going to focus solely on one aspect of such strategy, the unit tests.

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Unit testing and code coverage for ASP.NET Web API (1/2)

This is the second post in the series on Web API. Topic is TDD and code coverage, so I am going to demonstrate how to unit test your core code, as well as the API code and in the end, how to measure the code coverage you achieved on testing your code base. First, I am going through the changes needed to take place in  the application architecture and then I will go to tests, so this article is divided into two parts.

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Mocking a class dependency which casts into a derived type using Moq

Let’s say we have the following, one class named Implementor which has an IParentInterface dependency.

In method DoWork of the class, we call the interface’s method, but we also call another method, which comes by casting the dependency to a derived interface.
All, good, we go ahead and create a unit test project, adding the Moq package as well, in order to mock dependencies.

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