def METHOD_NAME(iris_split_dataset_and_model):
    train, test, model = iris_split_dataset_and_model
    check_result = DatasetsSizeComparison().run(train, test, model)
    assert_that(check_result, instance_of(CheckResult))
    assert_that(check_result.value, instance_of(dict))
    assert_that(check_result.value, has_entries({
        "Train": instance_of(int),
        "Test": instance_of(int)
    }))