Student Management Module Unit Testing

# Introduction

In this project, you will learn how to create unit tests for a Student Management Module using JUnit 5 and Mockito. The project includes two main tasks: creating tests for the `StudentServiceImpl` class and creating tests for the `StudentController` class.

## 🎯 Tasks

In this project, you will learn:

- How to create a `ServiceTests.java` file to test the `StudentServiceImpl` class using JUnit 5
- How to create a `ControllerTests.java` file to test the `StudentController` class using JUnit 5 and Mockito
- How to use Spring Boot testing features, such as `@SpringBootTest` and `@MockBean`, to load the necessary components and create mocks for testing
- How to write test cases to verify the functionality of the `queryStudents()`, `insertStudent()`, and `deleteStudent()` methods in the `StudentServiceImpl` class
- How to write test cases to verify the functionality of the `getStudents()`, `getStudent()`, and `modifyStudent()` methods in the `StudentController` class

## 🏆 Achievements

After completing this project, you will be able to:

- Set up unit testing for a Spring Boot application using JUnit 5 and Mockito
- Use Spring Boot testing features to load the necessary components and create mocks for testing
- Write effective test cases to ensure the correctness of the service and controller layer implementations
- Use assertions to verify the expected behavior of the tested methods