Today I’d like to share with you a very interesting concept in software testing – Assert Object pattern. It makes the Assert part of a test much simpler and more readable. Let’s dive right into it 😉The Asserts Hell Let’s consider the following unit test: What’s wrong here? Given and When sections are great single-liners. We know straightaway what’s the input and the action executed. However, Then block is too complex. It’s hard to figure out, just passing quickly through this test, what is expected. T...

When it comes to writing maintainable UI test there always appears the term of Page Object Pattern. For those who are not familiar with Page Object, it’s the approach to building UI test that focuses on creating high-level abstraction over low-level details related to interaction with a tested application. This testing interface encapsulates all the noise related to technology and allows to clearly express intention of test cases. This concept is very well described...

While looking for some efficient solution to mock (or autogenerate) some testing data I stumbled upon this funny-named library called Bogus. I tried and compared it with another well-known library called AutoFixture. They’re both powerful and can speed up tedious manual object initialization. I was looking for a solution that would work with Entity Framework and our database models which required that some selected properties were always not-null. Also, just for my own...

Generic classes tests mechanism using NUnit with test cases

I’m a big fan of using con­ven­tions when devel­op­ing appli­ca­tions. I blogged about it in the past (here, here and later here). I also gave a talk about my expe­ri­ence with this approach and how I cur­rently use it at NDC last week (slides are avail­able here, video is here). One prob­lem I faced when try­ing to build con­ven­tion val­i­da­tion tests was lack of sim­ple API that would allow me to build the val­i­da­tion rules for my tests. I built a spike of such library (call...