import pytest
from scripts.mma_exec import create_parser

def test_parser_role_choices():
    """Test that the parser accepts valid roles and the prompt argument."""
    parser = create_parser()
    valid_roles = ['tier1', 'tier2', 'tier3', 'tier4']
    test_prompt = "Analyze the codebase for bottlenecks."

    for role in valid_roles:
        args = parser.parse_args(['--role', role, test_prompt])
        assert args.role == role
        assert args.prompt == test_prompt

def test_parser_invalid_role():
    """Test that the parser rejects roles outside the specified choices."""
    parser = create_parser()
    with pytest.raises(SystemExit):
        parser.parse_args(['--role', 'tier5', 'Some prompt'])

def test_parser_prompt_required():
    """Test that the prompt argument is mandatory."""
    parser = create_parser()
    with pytest.raises(SystemExit):
        parser.parse_args(['--role', 'tier3'])

def test_parser_help():
    """Test that the help flag works without raising errors (exits with 0)."""
    parser = create_parser()
    with pytest.raises(SystemExit) as excinfo:
        parser.parse_args(['--help'])
    assert excinfo.value.code == 0