Write Unit Tests for TouchSwitchHelper

[yrlmanoharreddy]

Description:
The TouchSwitchHelper class manages the interaction with a touch switch connected via a Pi4J DigitalInput. This issue involves writing unit tests to verify the functionality and robustness of the TouchSwitchHelper class.

Tasks:

1. Test Initialization Logic

   • Verify that the isTouched property correctly reflects the initial state of the DigitalInput.
   • Ensure that the initialize() method is called during object instantiation.

2. Test Event Listener Management

   • Test if the default DigitalStateChangeListener updates the isTouched property correctly when the state of the DigitalInput changes.
   • Validate that addEventListener() correctly adds a custom listener to the DigitalInput.
   • Test that removeEventListener() properly removes the listener and ensures no state updates occur after removal.

3. Test Logging

   • Verify that appropriate logs are generated during the initialization process.

4. Mock Dependencies

   • Use a mock for DigitalInput to simulate state changes and interactions.
   • Use a mock for DigitalStateChangeListener to validate listener behavior.

5. Edge Cases

   • Test the behavior when no listeners are added or removed.
   • Validate that the removeEventListener() method is idempotent (can be called multiple times without error).

Acceptance Criteria

• All test cases outlined in the tasks above are implemented.
• Code coverage for the TouchSwitchHelper class is at least 70%.
• Tests are written using a Java JUnit testing framework
• Mocking is implemented using a framework such as Mockito or a similar tool.
• All tests pass successfully, and edge cases are handled gracefully.

[pranayh24]

Hi, I'd like to work on this issue. Could you assign it to me?