langchain/tests/unit_tests/document_loaders/test_telegram.py

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from pathlib import Path
import pytest
from langchain.document_loaders import TelegramChatApiLoader, TelegramChatFileLoader
def test_telegram_chat_file_loader() -> None:
"""Test TelegramChatFileLoader."""
file_path = Path(__file__).parent / "test_docs" / "telegram.json"
loader = TelegramChatFileLoader(str(file_path))
docs = loader.load()
assert len(docs) == 1
assert docs[0].metadata["source"] == str(file_path)
assert docs[0].page_content == (
"Henry on 2020-01-01T00:00:02: It's 2020...\n\n"
"Henry on 2020-01-01T00:00:04: Fireworks!\n\n"
"Grace 🧤 ðŸ\x8d on 2020-01-01T00:00:05: You're a minute late!\n\n"
)
@pytest.mark.requires("telethon", "pandas")
def test_telegram_channel_loader_parsing() -> None:
"""Test TelegramChatApiLoader."""
file_path = Path(__file__).parent / "test_docs" / "telegram_channel.json"
# if we don't provide any value, it will skip fetching from telegram
# and will check the parsing logic.
loader = TelegramChatApiLoader(file_path=str(file_path))
docs = loader.load()
assert len(docs) == 1
print(docs[0].page_content)
assert docs[0].page_content == (
"Hello, world!.\nLLMs are awesome! Langchain is great. Telegram is the best!."
)