test_state.py 文件源码

def fixture_vm_class(fixture_data):
    _, _, fork_name, _ = fixture_data
    if fork_name == 'Frontier':
        return FrontierVMForTesting
    elif fork_name == 'Homestead':
        return HomesteadVMForTesting
    elif fork_name == 'EIP150':
        return EIP150VMForTesting
    elif fork_name == 'EIP158':
        return SpuriousDragonVMForTesting
    elif fork_name == 'Byzantium':
        return ByzantiumVMForTesting
    elif fork_name == 'Constantinople':
        pytest.skip("Constantinople VM has not been implemented")
    elif fork_name == 'Metropolis':
        pytest.skip("Metropolis VM has not been implemented")
    else:
        raise ValueError("Unknown Fork Name: {0}".format(fork_name))