Check it out. In unit testing, developers test individual functions, methods, modules, and packages to verify their correctness. Unit testing helps to find and fix bugs early in the development cycle, and it prevents regressions when refactoring. A good unit test can also serve as a form of documentation for developers who are new to the project. With a unit test, the results are harder to interpret than with integration testing. Unit tests take developers to understand the results. With integration tests, anyone can see if the software is working or not. The results are really simple to interpret. Maintenance Costs. Both these tests will cost your company in terms of time and money. It is really important to differentiate Unit testing vs Feature testing. You are correctly using Feature test, because you want to test business logic instead of a class directly. When you test, my personal recommendation is always create a second DB to only use with tests. It must be completely empty all the time. Notable Points about Feature Testing. Unlike unit tests, feature testing involves testing a new feature just like a user would. The goal is to interact with the new feature as a user and look for possible bugs so when the feature is finally deployed the user will experience the error-free version. Combinatorial testing may be better suited for the next section, when testing real feature flags that have too many variants. As mentioned before, we treat e2e testing FFs like UI login; test the FFs with due diligence in isolation and stub it everywhere else. Stubbing is better suited for turning on the flags and testing the features in full. Solved by verified expert. Unit testing is easy to develop because its done on units, small codes in an application, software or system while feature testing is done on multiple variations of a feature in an application, software or system. This means that feature testing is done after completion of a multiple codes to implement a certain Unit Tests test the smallest unit of the code, usually a method. Each unit test is closely tied to the method it is testing, and if it's well written it's tied (almost) only with that. They are great to guide the design of new code and the refactoring of existing code. They are great to spot problems long before the system is ready for With this pattern every unit test is written in 3 parts: Arrange: Setup the prerequisites for your test. Create objects, prepare inputs and configure mocked interfaces. Act: Perform the actual Unit Testing is done during the development (coding phase) of an application by the developers. Unit Tests isolate a section of code and verify its correctness. A unit may be an individual function, method, procedure, module, or object. In SDLC, STLC, V Model, Unit testing is first level of testing done before integration testing. xUnit.NET also supports fit-style testing directly out of the box with its Theory attribute and corresponding data attributes. Fit input data may be loaded from excel, database, or even a custom data source such as a Word document (by extending the base data attribute.) This allows you to capitalize on a single testing platform for both unit jArtQ.