Add test cases for FIUService.java class

[sweep-ai]

Description

This PR adds test cases for the methods in the FIUService.java class. The test cases are written in the FIUServiceTest.java class, which is located in the test directory of the project. The dependencies of the FIUService class are mocked using Mockito to simulate their behavior during the execution of the test cases. The goal is to ensure that the methods in the FIUService class are working as expected and to provide maximum coverage for the code.

Summary

• Created FIUServiceTest.java in the test directory to contain test cases for the methods in the FIUService.java class.
• Added test cases for the createConsent() method in the FIUServiceTest.java class.
• Added test cases for the createDataRequest() method in the FIUServiceTest.java class.
• Added test cases for the receiveSessionNotification() method in the FIUServiceTest.java class.
• Added test cases for the getAndSaveData() method in the FIUServiceTest.java class.
• Mocked the dependencies of the FIUService class using Mockito in the FIUServiceTest.java class.
• Ensured maximum coverage for the code in the FIUService.java class.

Fixes #18.

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git checkout sweep/add-test-cases-for-fiu-service_1

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