![]() ![]() Write a basic, first test for simplest (happy) path in file.In the simplest case, for a pure function like data parser or form value validator you should: TDD in React application should be based on unit tests for single components or helper (pure) functions. Should we test stylesheets? Should we test the render method of each component? What about interactions and mocking data? The theory behind it seems simple, isn’t it? How does it look in practice, in real frontend application? It is not clear what should we test on the frontend. Test-Driven Development is a software development process that relies on simple life-cycle: In TDD approach developer should first write single, failing tests and then try to write code that would pass the test. It is not obvious how or when we should write those tests. Developers are most often focused on Unit Tests. E2E tests are usually written by a Quality Assurance Specialist and could be based on Behaviour Driven Development scenarios that describe every possible path for a new feature in the application. The goal of these small pieces of code mentioned in the introduction is to verify small chunks of a system (then they are called Unit Tests) or whole scenarios on live application (this approach is called the end to end tests). ![]()
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