Add test case for dependency exclusions in DependencyTest

[yuehcw]

Description

This pull request adds a new test case to the DependencyTest class to verify the correct functionality of exclusion handling within the Dependency class.

Changes

• New Test Case:
  • testDependencyExclusions:
    • This test aims to verify that the addExclusion method in the Dependency class correctly adds exclusions.
    • It creates an Exclusion object and sets its groupId and artifactId.
    • The exclusion is added to the dependency using the dependency.addExclusion(exclusion) method.
    • The test verifies that the size of the exclusions list in the dependency is 1.
    • It checks that the groupId and artifactId of the added exclusion are correct.

Purpose

The purpose of this test case is to ensure that the exclusion handling functionality within the Dependency class works correctly. This is crucial for dependency management during the build process. With this test case, we can:

1. Ensure the correct functionality of the exclusion handling in the Dependency class.
2. Enhance the stability and reliability of the project code.
3. Provide a safety net for future improvements and refactoring to prevent regression.

[hiufung-kwok]

Please update the title to include the Jira ticket.