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2026-07-13 11:58:32 +08:00

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Python

"""Test Base Schema of documents."""
from collections.abc import Iterator
from langchain_core.document_loaders import BaseBlobParser, Blob
from langchain_core.documents import Document
from typing_extensions import override
def test_base_blob_parser() -> None:
"""Verify that the eager method is hooked up to the lazy method by default."""
class MyParser(BaseBlobParser):
"""A simple parser that returns a single document."""
@override
def lazy_parse(self, blob: Blob) -> Iterator[Document]:
"""Lazy parsing interface."""
yield Document(
page_content="foo",
)
parser = MyParser()
assert isinstance(parser.lazy_parse(Blob(data="who?")), Iterator)
# We're verifying that the eager method is hooked up to the lazy method by default.
docs = parser.parse(Blob(data="who?"))
assert len(docs) == 1
assert docs[0].page_content == "foo"