Test 2: Testing calculator functions...
Adding 2 + 3 = 5
✓ add function works
Subtracting 5 - 3 = 2
✓ subtract function works
Multiplying 4 * 3 = 12
✓ multiply function works
Dividing 10 / 2 = 5.0
✓ divide function works
Error: Cannot divide 10 by 0
WARNING: divide(10, 0) returned Error: Cannot divide by zero
✓ divide by zero handled (with warning)
SUCCESS: All calculator functions work correctly!
Calculator functions test passed!