Stop Using Repository Pattern With an ORM

There a tendency in software developers to want to follow a specific formula. Whether it is adhering to a methodology like agile or using a specific design pattern. This happens so often that we have a specific term for it in our field called Cargo cult programming. In these situation a programmer don’t ask themselves … 

 

TPL Dataflow Blocks: Post vs SendAsync

I was reading an excellent series of articles about TPL Dataflow from Jack Vanlightly the other day. He draw my attention to the difference between Post and SendAsync when we want to post something to a block. I wasn’t thinking about it much at the time. But as I progressed through my readings, I saw … 

 

xUnit BeforeAfterTestAttribute: How to Run Code Before And After Test

Sometimes we need to run a piece of custom code before and after a test and set of tests. One example of this might be when we want to change the thread culture. In this case we change it before test start to run and restore it to its original after test is finished. One … 

 

More Robust Asynchrony and Parallelism With TPL Dataflow ActionBlock

.In my previous post, I explained what TPL Dataflow is and when we should and shouldn’t use it. But I haven’t got into much detail about how it can help us solve real world scenarios. Since my last post, thanks to a comment on my previous post, I went though different Stackoverflow questions. I saw … 

 

xUnit: Control the Test Execution Order

Sometime in our tests, we need to control the test execution order. This mostly happens in our integration test and not as often as our unit tests. Some people might even argue that controlling the execution order of unit test is bad practice. You can read more about it here. The main reason to not … 

 

What is TPL Dataflow in .Net and When Should We Use It

There are various ways to write a concurrent or parallel program in .Net but they’re often don’t have the flexibility and robustness needed. That’s where TPL Dataflow comes in, it helps us build a more robust concurrent program and it can helps us reduce a lot of complexity. For example when we use other paradigms … 

 

xUnit: Share an SUT Instance Between Two Class Using Collection

In my previous post I talked about how we can Share Expensive Object Between Tests By Using IClassFixture. My previous post is about situations when we want to share a class instance between all test methods. Because a test class is created once per test method so its constructor is executed per test methods. But … 

 

Share Expensive Object Between Tests By IClassFixture

When XUnit run a test method, it’s going to create a new object of our test class for each and everyone of our test method. This can create a problem when the creation of the object is expensive and slow our tests down. But there’s a solution to it, we can use IClassFixture to share … 

 

Asynchronous Programming Series

Recently I wrote a series of posts regarding asynchronous programming. You can find the links to this series down below. In these series of posts I started from the definition of concurrency and how it’s different with parallelism. Then I moved on deeper into the subject by each post. My 10th post in this series … 

 

Thread Safety

There a lot of things that can go wrong in our code. But when we introduce concurrency or parallelism in our code, we potentially could experience different set of bugs. These are race conditions, deadlocks and data corruption to name a few. This happens because there might be a share piece of data between different …