The problem Let’s suppose that we have to write tests for presenter or viewmodel that supports two paths: anonymous and logged in user. We have use cases telling us if user is currently logged in, use case for fetching feed which we will present to the user and router for handling some of navigation events. …
In 2020 I had an opportunity to present my thoughts about crucial element of unit testing – test doubles. I discussed various examples of test doubles, ways to implement them and how they fit into specific test cases. Links to the conference talks you can find at the bottom of the article. Every talk had …
In some systems you sometimes need to record date or timestamp of given action. Good example could be comments system, where each comment has timestamp: interface CommentsInteractor { fun createComment(content: String): CommentEntity}data class CommentEntity( val content: String, val timestamp: Long) In our experiment we will perform two test cases: comment created at given time should …
We make use of parameterized test when we want to check system under test against various inputs while using same or similar test logic. Real life example for parameterized test may be unit conversion – meters to kilometers converter for the sake of UI display. In some place in an application (either web or mobile) …
In Junit based testing framework there are few possible test outcomes: passed, failed and crashed. In this short note we will dive into that mechanisms. Test will pass, if no exception is thrown. Empty test should always pass: class TestFlowShowcase : StringSpec({ "it should pass"{ // nothing here }}) Or test with assertion that passes: …
