Comprehensive Testing Strategies in Java Projects with Spring Boot

Different types of tests to consider

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When it comes to ensuring the quality and reliability of software, testing plays a crucial role. In Java projects, particularly those leveraging the Spring Boot framework, a variety of testing approaches can be employed to cover the full spectrum of needs — from the smallest units of code to the application’s interaction with external systems. In this article, we’ll explore the main types of tests, including unit tests, integration tests, system tests, and acceptance tests, and we’ll delve into the significance of mocks and stubs in the testing process.

Unit Testing

Purpose: Unit tests are designed to verify the correctness of isolated pieces of code, such as individual methods or classes, without dependencies on external systems or the integration between components.

Typical Use Case: A common scenario is testing a service method in a Spring Boot application that performs a calculation or manipulates data.

Example

Objective: Test the addUser method of a UserService that adds a user to a list.

public class UserService {
private List<User> users = new ArrayList<>();

public void addUser(User user) {…

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