Test 3: Testing main.py output...
SUCCESS: main.py prints the correct message!
Output was: Calculator ready!
\n--- Running Verification Tests ---
10 + 5 = 15 (Expected: 15)
10 - 5 = 5 (Expected: 5)
10 * 5 = 50 (Expected: 50)
10 / 5 = 2.0 (Expected: 2.0)
10 / 0 = Error: Division by zero (Expected: Error: Division by zero)
--- Verification Complete ---
Main output test passed!