Testing with default log level (INFO):
[2025-12-10 16:26:07] [INFO]: This is an info message - should be logged
[2025-12-10 16:26:07] [WARNING]: This is a warning message - should be logged
[2025-12-10 16:26:07] [ERROR]: This is an error message - should be logged

Testing with DEBUG log level:
[2025-12-10 16:26:07] [DEBUG]: This is a debug message - should be logged
[2025-12-10 16:26:07] [INFO]: This is an info message - should be logged
[2025-12-10 16:26:07] [WARNING]: This is a warning message - should be logged
[2025-12-10 16:26:07] [ERROR]: This is an error message - should be logged

Testing with WARNING log level:
[2025-12-10 16:26:07] [WARNING]: This is a warning message - should be logged
[2025-12-10 16:26:07] [ERROR]: This is an error message - should be logged

Testing with ERROR log level:
[2025-12-10 16:26:07] [ERROR]: This is an error message - should be logged

Testing with invalid log level:
[2025-12-10 16:26:07] [ERROR] [Logger]: Invalid log level: INVALID_LEVEL
Result of setting invalid level: Failure

Test completed.