Added unit tests for Dropdown_Item block class.

[mauteri]

Description of the Change

Closes #

How to test the Change

Changelog Entry

Added - New feature
Changed - Existing functionality
Deprecated - Soon-to-be removed feature
Removed - Feature
Fixed - Bug fix
Security - Vulnerability

Credits

Props @username, @username2, ...

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[what-the-diff]

PR Summary

• Added a New Testing Module
  A new unit test class Test_Dropdown_Item has been introduced for comprehensively testing another code module called GatherPress\Core\Blocks\Dropdown_Item.

• Testing Registered Filters
  A set of tests were developed to inspect the 'setup_hooks' method. It verifies that pertinent filters (codes that allow data transformation) are correctly registered in the system.

• Broad Scenario Testing for the apply_dropdown_attributes Method
  Multiple tests for apply_dropdown_attributes method were performed, checking various scenarios. These include:

  • Dealing with an absent link (empty href attribute).
  • Handling a 'page-top' link (hash # href attribute).
  • Managing a valid web address as href.
  • Coping with a case where no HTML link tag is present.

• Checking Output Accuracy
  Proper assertions (conditional checks in programming) were added to confirm that specific characteristics are available or absent in the resulting webpage design, rooted in different input conditions.