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add test for knn retriever (#7769)
# What - This is to add test for knn retriever. --------- Co-authored-by: Bagatur <baskaryan@gmail.com>
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tests/unit_tests/retrievers/test_knn.py
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tests/unit_tests/retrievers/test_knn.py
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from langchain.embeddings import FakeEmbeddings
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from langchain.retrievers.knn import KNNRetriever
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class TestKNNRetriever:
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def test_from_texts(self) -> None:
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input_texts = ["I have a pen.", "Do you have a pen?", "I have a bag."]
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knn_retriever = KNNRetriever.from_texts(
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texts=input_texts, embeddings=FakeEmbeddings(size=100)
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)
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assert len(knn_retriever.texts) == 3
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