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If you’re encountering the error message “ReactWrapper::state() can only be called on class components” while writing unit tests in React using Jest and Enzyme, don’t worry. You’re not alone in facing this problem. In this article, we’ll explore the cause of this error and provide you with a solution to overcome it. Understanding the Error…
Introduction: Welcome to our comprehensive guide on mocking the useHistory hook in Jest for React Router v5.1.2 with TypeScript. If you’ve encountered the error “TypeError: Cannot read property ‘history’ of undefined” while running unit tests, you’re in the right place. In this article, we’ll walk you through the process of mocking the useHistory hook to…
When it comes to Mockito and JUnit testing, one of the most common issues developers face is the infamous “null @MockBean” problem. This article dives into the root cause of this issue and offers a solution to ensure your tests run smoothly and efficiently. Grab your coffee, and let’s get started! Understanding the Problem The…
Testing is an essential part of the development process, especially when working with modern frameworks such as React. In this blog post, we will delve into a common issue that developers face while testing React functional components with Jest and Enzyme: spying on methods and dealing with the error “Cannot spyOn on a primitive value;…
