Missing verification of generated reports in ReportControllerIntegrationTest

[pmoustopoulos]

Issue Description

The ReportControllerIntegrationTest class in the src/test/java/com/ainigma100/departmentapi/integration/ directory is missing verification steps for the generated reports. The tests currently only check the HTTP response status, but they do not verify the content or correctness of the reports themselves. JasperReport libraries were used to generate the reports.

Steps to Reproduce

1. Set up the project and execute the ReportControllerIntegrationTest class.
2. Review the tests givenNoInput_whenGenerateDepartmentsExcelReport, givenNoInput_whenGenerateEmployeesExcelReport, givenNoInput_whenGeneratePdfFullReport, givenNoInput_whenGenerateAndZipReports, and givenNoInput_whenGenerateMultiSheetExcelReport.
3. Notice that the tests only verify the HTTP response status and do not perform any assertions on the actual report content.

Expected Behavior

The integration tests for generating reports should include assertions to verify that the generated reports, created using the JasperReport libraries (version 6.20.5), contain the correct values, ensuring their accuracy and integrity.

Proposed Solution

To fix this issue, we need to modify the ReportControllerIntegrationTest class and add appropriate assertions to verify the content of the generated reports. This may involve using the JasperReport API to extract the report data from the response, parsing it, and asserting on specific values or structures.