Source code for tests.system.huggingface.example_read_only

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"""Read a pinned public dataset, map it, and validate the durable XCom handoff."""

from __future__ import annotations

from airflow.providers.huggingface.operators.datasets import LoadDatasetOperator, MapDatasetOperator
from airflow.sdk import DAG, task


[docs]
SOURCE_REPO = "nyu-mll/glue"


[docs]
SOURCE_REVISION = "bcdcba79d07bc864c1c254ccfcedcce55bcc9a8c"




[docs]
def add_pair_text(example):
    return {"pair_text": f"{example['sentence1']} [SEP] {example['sentence2']}"}



with DAG(dag_id="huggingface_system_read_only", schedule="@once", tags=["huggingface", "system-test"]) as dag:
    # [START huggingface_load_and_map_example]

[docs]
    load = LoadDatasetOperator(
        task_id="load_public_dataset",
        path=SOURCE_REPO,
        name="mrpc",
        split="train[:8]",
        revision=SOURCE_REVISION,
        output_uri="file:///tmp/hf-provider-system/read-only-source.json",
        huggingface_conn_id=None,
    )

    mapped = MapDatasetOperator(
        task_id="map_public_dataset",
        input_uri=load.output,
        output_uri="file:///tmp/hf-provider-system/read-only-mapped.json",
        transform=add_pair_text,
    )
    # [END huggingface_load_and_map_example]

    @task
    def verify_xcom_and_artifact(load_ref, mapped_ref):
        assert load_ref["revision"] == SOURCE_REVISION
        dataset_ref = mapped_ref["splits"]["dataset"]
        assert dataset_ref["rows"] == 8
        assert "pair_text" in dataset_ref["features"]
        return {"revision": load_ref["revision"], "rows": dataset_ref["rows"]}

    verify_xcom_and_artifact(load.output, mapped.output)

    from tests_common.test_utils.watcher import watcher

    list(dag.tasks) >> watcher()


from tests_common.test_utils.system_tests import get_test_run  # noqa: E402

# Needed to run the example DAG with pytest (see: contributing-docs/testing/system_tests.rst)

[docs]
test_run = get_test_run(dag)