def METHOD_NAME(create_command, first_app_config):
    "Test that the glibc version of the local system can be returned"
    # Mock a non-docker setup
    create_command.target_image = None
    create_command.tools.os.confstr = MagicMock(return_value="glibc 2.42")
    # The glibc version was returned
    assert create_command.target_glibc_version(first_app_config) == "2.42"
    # The OS module was consulted for the glibc version
    create_command.tools.os.confstr.assert_called_once_with("CS_GNU_LIBC_VERSION")