Add tests for AlbumUtils private constructor and formatYear method

[Lemeri123]

This pull request adds unit tests for the AlbumUtils class.

1.Added test for formatYear method:

• Tests the formatYear method with a valid date string.
• Tests the formatYear method with an invalid date string and expects a StringIndexOutOfBoundsException.

2.Added test for private constructor:

• Uses reflection to access the private constructor of the AlbumUtils class.
• Ensures that the private constructor throws an IllegalStateException.

[josdem]

Just small changes before merge @Lemeri123 I appreciate your effort.

[josdem]

Quality Gate passed

Issues 5 New issues 0 Accepted issues

Measures 0 Security Hotspots 0.0% Coverage on New Code 0.0% Duplication on New Code

See analysis details on SonarQube Cloud

@Lemeri123 Also please address these issues reported by SonarCloud before merge.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[josdem]

Thanks for doing suggested changes, with my comments I am looking to improve your skills as developer.

[Lemeri123]

Thank you so much @josdem I really appreciate