Nextjs Testing Examples

Overview

React Component Testing is an essential practice for ensuring that components behave as expected in various scenarios. This collection offers a comprehensive set of tests utilized for different types of React components using tools like Jest and the React Testing Library. By providing real-world examples, it serves as a valuable reference for both novices and experienced developers looking to deepen their understanding of effective testing practices.

This repository covers various aspects of React component behavior, including handling input validation, user interactions, and managing API responses. With practical demonstrations within each component folder, one can easily navigate through different testing scenarios, making it an ideal resource for anyone aiming to enhance their skills in React testing.

Features

• Diverse Test Cases: Includes a variety of test examples such as forms with onSubmit handlers, input validation, and button clicks to simulate real-world interactions.
• Mock Functionalities with jest.fn(): Offers mock functions to track calls and arguments, making it easier to assert function behavior during tests.
• Efficient Component Rendering: Utilizes render(component) to effectively render React components into the testing DOM for thorough evaluations.
• Accessible Querying with screen: Allows easy access to rendered elements using queries such as getByText and getByRole, streamlining the testing process.
• Simulated User Interaction: Incorporates the userEvent library to mimic user actions like clicking and typing, ensuring realistic user experiences during tests.
• Asynchronous Testing Support: Features waitFor(callback) to handle async rendering, perfect for testing components that fetch data from APIs with various loading and error states.
• Comprehensive Matchers with expect(): Provides extensive matcher functions to assert values, deep comparisons, and check for behaviors, increasing the precision of tests.
• Setup and Cleanup with beforeEach/afterEach: Facilitates test organization by allowing setup or cleanup logic to be easily applied before and after each test, ensuring a clean test environment.