This post is about writing integration tests and TestContainers. As you might know writing integration tests against the in-memory provider is a bad practice. Because it only works well with trivial solutions. Mostly because the in-memory API of IQueryProvider doesn’t match the LINQ query provider. Here’s a good article called “Avoid In-Memory Databases for Tests” …
C#
Enum Serialization: System.Text.Json vs Utf8Json vs Jil vs Newtonsoft
I was reading about the new System.Text.Json in .net core 3 and comparing its speed to other libraries. You can read more about it here if you’re interested. To put it shortly, the new serializer is faster then Newtonsoft but not as fast as others. Also the enum serialization between different libraries can be inconsistent. …
Careful Model Binding JavaScript ISO Date Format to DateTime
It is agreed by the .Net community that DateTime should not be used when we develop .Net applications. You can read more about why that here. In short the least we can do is to use DateTimeOffset instead. But this post is not about the common problems associated with using DateTime. But rather it’s about …
Upgrade to Asp.Net Core From Asp.Net MVC 5
I’m working on a project written with Asp.Net MVC 5 were I work. We intend first upgrade our class libraries to .Net Standard as much as we can. Then we make the move to Asp.Net Core. But since we have many class libraries, I’ve decide to first do a little search about what is the …
XUnit – Part 7: Categorizing Tests with xUnit Trait
Sometimes we only need to run a specific kind of tests and not others. In order to be able to do that we need some mechanism to categorize our tests. xUnit has a built in mechanism for this called Trait. In this post I’m going to show how we can use it to categorize our …
XUnit – Part 6: Testing The Database with xUnit Custom Attributes
In this Often we need to test our database code. There are a lot of ways to do that, but I think the cleanest way is to create a custom attribute for it. What we want to achieve is to create a custom attribute. In this attribute we pass the information need to connect to …
XUnit – Part 5: Share Test Context With IClassFixture and ICollectionFixture
xUnit has different mechanisms to share test context and dependencies. Not only it allows us to share different dependencies between tests, but also between multiple test classes. We can also choose to get a fresh set of data every time for our test. So in this post, I’m going to go though those mechanism with …
XUnit – Part 4: Parallelism and Custom Test Collections
As multi core processor and computers gain prevalence, the topic of Parallelism become more important. It allows us to use the computing resource we have available to the fullest. So by release of xUnit 2, we have the ability to run the tests in parallel. In this version, the tests are gathered into collection, and …
XUnit – Part 3: Action Based Assertions Assert.Raises and Assert.Throws
In my previous post, we saw how value and type based assertions works in xUnit. In this post I’m going to focus on assertions that check whether or not something happened. Specifically we look at assertions to check if an event is raised or an exception is thrown. Asserting if An Event Is Raised Let’s …
XUnit – Part 1: xUnit Packages and Writing Your First Unit Test
I one of my previous post I said I’m going to write a series of articles on xUnit. I’m going to start from the begging which is installing xUnit packages. I’m also going to explain a little about other frameworks that might be used with xUnit to complement it. In the future I’ll go in …