Question

I want to run integration tests on my store filters e.g.

I filter by price and by different product attributes

are there pattern or best practices on how to assert on such a test, I’ll illustrate an example:

Say I am calling a Repository.GetOnlyTShirtsWithColorRed() in my test db I have all the possible types of items.

I may get more then 1 item back but I want to assert that they all have a Red Color and they are all T-Shirts

I have read in many books that looping and iterating in tests in bad practice but how else may I assert that no mistake was done by my code, in a more complex query this may help to catch the bugs

Answer 1

From what I read – you want to test that your repository implementation works with a real DB – aka integration tests.

If the above is true, I think you’re on the right path. My assert would probably look like

Assert.That(shirtsFromRepo.All(shirt => shirt.Color == Colors.Red), "all shirts were not red!)

As for the “best practice”, can you post a link?

AFAIK the only recommendation is to avoid complicated logic in your code (e.g. ifs and other control structures) and testing one thing per test.