def METHOD_NAME(mocker, response):
    """Verify that SsmClient.get_parameter behaves as expected."""
    mock_aws_api(mocker)
    mocker.patch("pcluster.aws.ssm.SsmClient.get_parameter", side_effect=response)
    assert_that(_DummyAWSApi().instance().ssm.get_parameter(FAKE_SSM_PARAMETER)).is_equal_to(response)