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829 lines
20 KiB
Python
829 lines
20 KiB
Python
"""Test text splitting functionality."""
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from typing import List
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import pytest
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from langchain.docstore.document import Document
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from langchain.text_splitter import (
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CharacterTextSplitter,
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Language,
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MarkdownHeaderTextSplitter,
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PythonCodeTextSplitter,
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RecursiveCharacterTextSplitter,
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)
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FAKE_PYTHON_TEXT = """
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class Foo:
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def bar():
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def foo():
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def testing_func():
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def bar():
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"""
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def test_character_text_splitter() -> None:
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"""Test splitting by character count."""
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text = "foo bar baz 123"
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splitter = CharacterTextSplitter(separator=" ", chunk_size=7, chunk_overlap=3)
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output = splitter.split_text(text)
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expected_output = ["foo bar", "bar baz", "baz 123"]
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assert output == expected_output
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def test_character_text_splitter_empty_doc() -> None:
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"""Test splitting by character count doesn't create empty documents."""
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text = "foo bar"
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splitter = CharacterTextSplitter(separator=" ", chunk_size=2, chunk_overlap=0)
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output = splitter.split_text(text)
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expected_output = ["foo", "bar"]
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assert output == expected_output
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def test_character_text_splitter_separtor_empty_doc() -> None:
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"""Test edge cases are separators."""
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text = "f b"
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splitter = CharacterTextSplitter(separator=" ", chunk_size=2, chunk_overlap=0)
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output = splitter.split_text(text)
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expected_output = ["f", "b"]
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assert output == expected_output
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def test_character_text_splitter_long() -> None:
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"""Test splitting by character count on long words."""
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text = "foo bar baz a a"
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splitter = CharacterTextSplitter(separator=" ", chunk_size=3, chunk_overlap=1)
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output = splitter.split_text(text)
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expected_output = ["foo", "bar", "baz", "a a"]
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assert output == expected_output
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def test_character_text_splitter_short_words_first() -> None:
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"""Test splitting by character count when shorter words are first."""
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text = "a a foo bar baz"
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splitter = CharacterTextSplitter(separator=" ", chunk_size=3, chunk_overlap=1)
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output = splitter.split_text(text)
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expected_output = ["a a", "foo", "bar", "baz"]
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assert output == expected_output
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def test_character_text_splitter_longer_words() -> None:
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"""Test splitting by characters when splits not found easily."""
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text = "foo bar baz 123"
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splitter = CharacterTextSplitter(separator=" ", chunk_size=1, chunk_overlap=1)
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output = splitter.split_text(text)
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expected_output = ["foo", "bar", "baz", "123"]
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assert output == expected_output
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def test_character_text_splitting_args() -> None:
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"""Test invalid arguments."""
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with pytest.raises(ValueError):
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CharacterTextSplitter(chunk_size=2, chunk_overlap=4)
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def test_merge_splits() -> None:
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"""Test merging splits with a given separator."""
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splitter = CharacterTextSplitter(separator=" ", chunk_size=9, chunk_overlap=2)
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splits = ["foo", "bar", "baz"]
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expected_output = ["foo bar", "baz"]
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output = splitter._merge_splits(splits, separator=" ")
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assert output == expected_output
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def test_create_documents() -> None:
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"""Test create documents method."""
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texts = ["foo bar", "baz"]
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splitter = CharacterTextSplitter(separator=" ", chunk_size=3, chunk_overlap=0)
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docs = splitter.create_documents(texts)
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expected_docs = [
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Document(page_content="foo"),
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Document(page_content="bar"),
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Document(page_content="baz"),
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]
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assert docs == expected_docs
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def test_create_documents_with_metadata() -> None:
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"""Test create documents with metadata method."""
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texts = ["foo bar", "baz"]
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splitter = CharacterTextSplitter(separator=" ", chunk_size=3, chunk_overlap=0)
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docs = splitter.create_documents(texts, [{"source": "1"}, {"source": "2"}])
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expected_docs = [
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Document(page_content="foo", metadata={"source": "1"}),
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Document(page_content="bar", metadata={"source": "1"}),
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Document(page_content="baz", metadata={"source": "2"}),
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]
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assert docs == expected_docs
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def test_create_documents_with_start_index() -> None:
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"""Test create documents method."""
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texts = ["foo bar baz 123"]
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splitter = CharacterTextSplitter(
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separator=" ", chunk_size=7, chunk_overlap=3, add_start_index=True
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)
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docs = splitter.create_documents(texts)
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expected_docs = [
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Document(page_content="foo bar", metadata={"start_index": 0}),
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Document(page_content="bar baz", metadata={"start_index": 4}),
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Document(page_content="baz 123", metadata={"start_index": 8}),
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]
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assert docs == expected_docs
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def test_metadata_not_shallow() -> None:
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"""Test that metadatas are not shallow."""
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texts = ["foo bar"]
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splitter = CharacterTextSplitter(separator=" ", chunk_size=3, chunk_overlap=0)
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docs = splitter.create_documents(texts, [{"source": "1"}])
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expected_docs = [
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Document(page_content="foo", metadata={"source": "1"}),
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Document(page_content="bar", metadata={"source": "1"}),
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]
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assert docs == expected_docs
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docs[0].metadata["foo"] = 1
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assert docs[0].metadata == {"source": "1", "foo": 1}
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assert docs[1].metadata == {"source": "1"}
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def test_iterative_text_splitter_keep_separator() -> None:
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chunk_size = 5
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output = __test_iterative_text_splitter(chunk_size=chunk_size, keep_separator=True)
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assert output == [
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"....5",
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"X..3",
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"Y...4",
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"X....5",
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"Y...",
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]
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def test_iterative_text_splitter_discard_separator() -> None:
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chunk_size = 5
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output = __test_iterative_text_splitter(chunk_size=chunk_size, keep_separator=False)
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assert output == [
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"....5",
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"..3",
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"...4",
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"....5",
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"...",
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]
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def __test_iterative_text_splitter(chunk_size: int, keep_separator: bool) -> List[str]:
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chunk_size += 1 if keep_separator else 0
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splitter = RecursiveCharacterTextSplitter(
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chunk_size=chunk_size,
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chunk_overlap=0,
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separators=["X", "Y"],
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keep_separator=keep_separator,
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)
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text = "....5X..3Y...4X....5Y..."
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output = splitter.split_text(text)
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for chunk in output:
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assert len(chunk) <= chunk_size, f"Chunk is larger than {chunk_size}"
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return output
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def test_iterative_text_splitter() -> None:
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"""Test iterative text splitter."""
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text = """Hi.\n\nI'm Harrison.\n\nHow? Are? You?\nOkay then f f f f.
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This is a weird text to write, but gotta test the splittingggg some how.
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Bye!\n\n-H."""
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splitter = RecursiveCharacterTextSplitter(chunk_size=10, chunk_overlap=1)
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output = splitter.split_text(text)
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expected_output = [
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"Hi.",
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"I'm",
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"Harrison.",
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"How? Are?",
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"You?",
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"Okay then",
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"f f f f.",
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"This is a",
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"weird",
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"text to",
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"write,",
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"but gotta",
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"test the",
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"splitting",
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"gggg",
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"some how.",
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"Bye!",
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"-H.",
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]
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assert output == expected_output
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def test_split_documents() -> None:
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"""Test split_documents."""
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splitter = CharacterTextSplitter(separator="", chunk_size=1, chunk_overlap=0)
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docs = [
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Document(page_content="foo", metadata={"source": "1"}),
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Document(page_content="bar", metadata={"source": "2"}),
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Document(page_content="baz", metadata={"source": "1"}),
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]
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expected_output = [
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Document(page_content="f", metadata={"source": "1"}),
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Document(page_content="o", metadata={"source": "1"}),
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Document(page_content="o", metadata={"source": "1"}),
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Document(page_content="b", metadata={"source": "2"}),
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Document(page_content="a", metadata={"source": "2"}),
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Document(page_content="r", metadata={"source": "2"}),
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Document(page_content="b", metadata={"source": "1"}),
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Document(page_content="a", metadata={"source": "1"}),
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Document(page_content="z", metadata={"source": "1"}),
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]
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assert splitter.split_documents(docs) == expected_output
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def test_python_text_splitter() -> None:
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splitter = PythonCodeTextSplitter(chunk_size=30, chunk_overlap=0)
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splits = splitter.split_text(FAKE_PYTHON_TEXT)
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split_0 = """class Foo:\n\n def bar():"""
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split_1 = """def foo():"""
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split_2 = """def testing_func():"""
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split_3 = """def bar():"""
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expected_splits = [split_0, split_1, split_2, split_3]
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assert splits == expected_splits
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CHUNK_SIZE = 16
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def test_python_code_splitter() -> None:
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splitter = RecursiveCharacterTextSplitter.from_language(
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Language.PYTHON, chunk_size=CHUNK_SIZE, chunk_overlap=0
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)
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code = """
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def hello_world():
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print("Hello, World!")
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# Call the function
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hello_world()
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"""
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chunks = splitter.split_text(code)
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assert chunks == [
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"def",
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"hello_world():",
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'print("Hello,',
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'World!")',
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"# Call the",
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"function",
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"hello_world()",
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]
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def test_golang_code_splitter() -> None:
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splitter = RecursiveCharacterTextSplitter.from_language(
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Language.GO, chunk_size=CHUNK_SIZE, chunk_overlap=0
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)
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code = """
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package main
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import "fmt"
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func helloWorld() {
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fmt.Println("Hello, World!")
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}
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func main() {
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helloWorld()
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}
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"""
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chunks = splitter.split_text(code)
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assert chunks == [
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"package main",
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'import "fmt"',
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"func",
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"helloWorld() {",
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'fmt.Println("He',
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"llo,",
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'World!")',
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"}",
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"func main() {",
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"helloWorld()",
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"}",
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]
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def test_rst_code_splitter() -> None:
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splitter = RecursiveCharacterTextSplitter.from_language(
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Language.RST, chunk_size=CHUNK_SIZE, chunk_overlap=0
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)
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code = """
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Sample Document
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===============
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Section
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-------
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This is the content of the section.
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Lists
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-----
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- Item 1
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- Item 2
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- Item 3
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Comment
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*******
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Not a comment
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.. This is a comment
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"""
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chunks = splitter.split_text(code)
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assert chunks == [
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"Sample Document",
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"===============",
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"Section",
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"-------",
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"This is the",
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"content of the",
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"section.",
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"Lists",
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"-----",
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"- Item 1",
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"- Item 2",
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"- Item 3",
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"Comment",
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"*******",
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"Not a comment",
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".. This is a",
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"comment",
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]
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def test_proto_file_splitter() -> None:
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splitter = RecursiveCharacterTextSplitter.from_language(
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Language.PROTO, chunk_size=CHUNK_SIZE, chunk_overlap=0
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)
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code = """
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syntax = "proto3";
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package example;
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message Person {
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string name = 1;
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int32 age = 2;
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repeated string hobbies = 3;
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}
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"""
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chunks = splitter.split_text(code)
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assert chunks == [
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"syntax =",
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'"proto3";',
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"package",
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"example;",
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"message Person",
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"{",
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"string name",
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"= 1;",
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"int32 age =",
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"2;",
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"repeated",
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"string hobbies",
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"= 3;",
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"}",
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]
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def test_javascript_code_splitter() -> None:
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splitter = RecursiveCharacterTextSplitter.from_language(
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Language.JS, chunk_size=CHUNK_SIZE, chunk_overlap=0
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)
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code = """
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function helloWorld() {
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console.log("Hello, World!");
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}
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// Call the function
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helloWorld();
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"""
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chunks = splitter.split_text(code)
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assert chunks == [
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"function",
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"helloWorld() {",
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'console.log("He',
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"llo,",
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'World!");',
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"}",
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"// Call the",
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"function",
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"helloWorld();",
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]
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def test_java_code_splitter() -> None:
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splitter = RecursiveCharacterTextSplitter.from_language(
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Language.JAVA, chunk_size=CHUNK_SIZE, chunk_overlap=0
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)
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code = """
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public class HelloWorld {
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public static void main(String[] args) {
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System.out.println("Hello, World!");
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}
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}
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"""
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chunks = splitter.split_text(code)
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assert chunks == [
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"public class",
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"HelloWorld {",
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"public",
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"static void",
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"main(String[]",
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"args) {",
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"System.out.prin",
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'tln("Hello,',
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'World!");',
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"}\n}",
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]
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def test_cpp_code_splitter() -> None:
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splitter = RecursiveCharacterTextSplitter.from_language(
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Language.CPP, chunk_size=CHUNK_SIZE, chunk_overlap=0
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)
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code = """
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#include <iostream>
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int main() {
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std::cout << "Hello, World!" << std::endl;
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return 0;
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}
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"""
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chunks = splitter.split_text(code)
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assert chunks == [
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"#include",
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"<iostream>",
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"int main() {",
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"std::cout",
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'<< "Hello,',
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'World!" <<',
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"std::endl;",
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"return 0;\n}",
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]
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def test_scala_code_splitter() -> None:
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splitter = RecursiveCharacterTextSplitter.from_language(
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Language.SCALA, chunk_size=CHUNK_SIZE, chunk_overlap=0
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)
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code = """
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object HelloWorld {
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def main(args: Array[String]): Unit = {
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println("Hello, World!")
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}
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}
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"""
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chunks = splitter.split_text(code)
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assert chunks == [
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"object",
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"HelloWorld {",
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"def",
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"main(args:",
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"Array[String]):",
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"Unit = {",
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'println("Hello,',
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'World!")',
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"}\n}",
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]
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|
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def test_ruby_code_splitter() -> None:
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splitter = RecursiveCharacterTextSplitter.from_language(
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Language.RUBY, chunk_size=CHUNK_SIZE, chunk_overlap=0
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)
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code = """
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def hello_world
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puts "Hello, World!"
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end
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hello_world
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"""
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chunks = splitter.split_text(code)
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assert chunks == [
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"def hello_world",
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'puts "Hello,',
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'World!"',
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"end",
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"hello_world",
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]
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|
|
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def test_php_code_splitter() -> None:
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splitter = RecursiveCharacterTextSplitter.from_language(
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Language.PHP, chunk_size=CHUNK_SIZE, chunk_overlap=0
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)
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code = """
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<?php
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function hello_world() {
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echo "Hello, World!";
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}
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hello_world();
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?>
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"""
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chunks = splitter.split_text(code)
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assert chunks == [
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"<?php",
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"function",
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"hello_world() {",
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"echo",
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'"Hello,',
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|
'World!";',
|
|
"}",
|
|
"hello_world();",
|
|
"?>",
|
|
]
|
|
|
|
|
|
def test_swift_code_splitter() -> None:
|
|
splitter = RecursiveCharacterTextSplitter.from_language(
|
|
Language.SWIFT, chunk_size=CHUNK_SIZE, chunk_overlap=0
|
|
)
|
|
code = """
|
|
func helloWorld() {
|
|
print("Hello, World!")
|
|
}
|
|
|
|
helloWorld()
|
|
"""
|
|
chunks = splitter.split_text(code)
|
|
assert chunks == [
|
|
"func",
|
|
"helloWorld() {",
|
|
'print("Hello,',
|
|
'World!")',
|
|
"}",
|
|
"helloWorld()",
|
|
]
|
|
|
|
|
|
def test_rust_code_splitter() -> None:
|
|
splitter = RecursiveCharacterTextSplitter.from_language(
|
|
Language.RUST, chunk_size=CHUNK_SIZE, chunk_overlap=0
|
|
)
|
|
code = """
|
|
fn main() {
|
|
println!("Hello, World!");
|
|
}
|
|
"""
|
|
chunks = splitter.split_text(code)
|
|
assert chunks == ["fn main() {", 'println!("Hello', ",", 'World!");', "}"]
|
|
|
|
|
|
def test_markdown_code_splitter() -> None:
|
|
splitter = RecursiveCharacterTextSplitter.from_language(
|
|
Language.MARKDOWN, chunk_size=CHUNK_SIZE, chunk_overlap=0
|
|
)
|
|
code = """
|
|
# Sample Document
|
|
|
|
## Section
|
|
|
|
This is the content of the section.
|
|
|
|
## Lists
|
|
|
|
- Item 1
|
|
- Item 2
|
|
- Item 3
|
|
|
|
### Horizontal lines
|
|
|
|
***********
|
|
____________
|
|
-------------------
|
|
|
|
#### Code blocks
|
|
```
|
|
This is a code block
|
|
```
|
|
"""
|
|
chunks = splitter.split_text(code)
|
|
assert chunks == [
|
|
"# Sample",
|
|
"Document",
|
|
"## Section",
|
|
"This is the",
|
|
"content of the",
|
|
"section.",
|
|
"## Lists",
|
|
"- Item 1",
|
|
"- Item 2",
|
|
"- Item 3",
|
|
"### Horizontal",
|
|
"lines",
|
|
"***********",
|
|
"____________",
|
|
"---------------",
|
|
"----",
|
|
"#### Code",
|
|
"blocks",
|
|
"```",
|
|
"This is a code",
|
|
"block",
|
|
"```",
|
|
]
|
|
|
|
|
|
def test_html_code_splitter() -> None:
|
|
splitter = RecursiveCharacterTextSplitter.from_language(
|
|
Language.HTML, chunk_size=60, chunk_overlap=0
|
|
)
|
|
code = """
|
|
<h1>Sample Document</h1>
|
|
<h2>Section</h2>
|
|
<p id="1234">Reference content.</p>
|
|
|
|
<h2>Lists</h2>
|
|
<ul>
|
|
<li>Item 1</li>
|
|
<li>Item 2</li>
|
|
<li>Item 3</li>
|
|
</ul>
|
|
|
|
<h3>A block</h3>
|
|
<div class="amazing">
|
|
<p>Some text</p>
|
|
<p>Some more text</p>
|
|
</div>
|
|
"""
|
|
chunks = splitter.split_text(code)
|
|
assert chunks == [
|
|
"<h1>Sample Document</h1>\n <h2>Section</h2>",
|
|
'<p id="1234">Reference content.</p>',
|
|
"<h2>Lists</h2>\n <ul>",
|
|
"<li>Item 1</li>\n <li>Item 2</li>",
|
|
"<li>Item 3</li>\n </ul>",
|
|
"<h3>A block</h3>",
|
|
'<div class="amazing">',
|
|
"<p>Some text</p>",
|
|
"<p>Some more text</p>\n </div>",
|
|
]
|
|
|
|
|
|
def test_md_header_text_splitter_1() -> None:
|
|
"""Test markdown splitter by header: Case 1."""
|
|
|
|
markdown_document = (
|
|
"# Foo\n\n"
|
|
" ## Bar\n\n"
|
|
"Hi this is Jim\n\n"
|
|
"Hi this is Joe\n\n"
|
|
" ## Baz\n\n"
|
|
" Hi this is Molly"
|
|
)
|
|
headers_to_split_on = [
|
|
("#", "Header 1"),
|
|
("##", "Header 2"),
|
|
]
|
|
markdown_splitter = MarkdownHeaderTextSplitter(
|
|
headers_to_split_on=headers_to_split_on,
|
|
)
|
|
output = markdown_splitter.split_text(markdown_document)
|
|
expected_output = [
|
|
{
|
|
"content": "Hi this is Jim \nHi this is Joe",
|
|
"metadata": {"Header 1": "Foo", "Header 2": "Bar"},
|
|
},
|
|
{
|
|
"content": "Hi this is Molly",
|
|
"metadata": {"Header 1": "Foo", "Header 2": "Baz"},
|
|
},
|
|
]
|
|
assert output == expected_output
|
|
|
|
|
|
def test_md_header_text_splitter_2() -> None:
|
|
"""Test markdown splitter by header: Case 2."""
|
|
markdown_document = (
|
|
"# Foo\n\n"
|
|
" ## Bar\n\n"
|
|
"Hi this is Jim\n\n"
|
|
"Hi this is Joe\n\n"
|
|
" ### Boo \n\n"
|
|
" Hi this is Lance \n\n"
|
|
" ## Baz\n\n"
|
|
" Hi this is Molly"
|
|
)
|
|
|
|
headers_to_split_on = [
|
|
("#", "Header 1"),
|
|
("##", "Header 2"),
|
|
("###", "Header 3"),
|
|
]
|
|
markdown_splitter = MarkdownHeaderTextSplitter(
|
|
headers_to_split_on=headers_to_split_on,
|
|
)
|
|
output = markdown_splitter.split_text(markdown_document)
|
|
expected_output = [
|
|
{
|
|
"content": "Hi this is Jim \nHi this is Joe",
|
|
"metadata": {"Header 1": "Foo", "Header 2": "Bar"},
|
|
},
|
|
{
|
|
"content": "Hi this is Lance",
|
|
"metadata": {"Header 1": "Foo", "Header 2": "Bar", "Header 3": "Boo"},
|
|
},
|
|
{
|
|
"content": "Hi this is Molly",
|
|
"metadata": {"Header 1": "Foo", "Header 2": "Baz"},
|
|
},
|
|
]
|
|
assert output == expected_output
|
|
|
|
|
|
def test_md_header_text_splitter_3() -> None:
|
|
"""Test markdown splitter by header: Case 3."""
|
|
|
|
markdown_document = (
|
|
"# Foo\n\n"
|
|
" ## Bar\n\n"
|
|
"Hi this is Jim\n\n"
|
|
"Hi this is Joe\n\n"
|
|
" ### Boo \n\n"
|
|
" Hi this is Lance \n\n"
|
|
" #### Bim \n\n"
|
|
" Hi this is John \n\n"
|
|
" ## Baz\n\n"
|
|
" Hi this is Molly"
|
|
)
|
|
|
|
headers_to_split_on = [
|
|
("#", "Header 1"),
|
|
("##", "Header 2"),
|
|
("###", "Header 3"),
|
|
("####", "Header 4"),
|
|
]
|
|
|
|
markdown_splitter = MarkdownHeaderTextSplitter(
|
|
headers_to_split_on=headers_to_split_on,
|
|
)
|
|
output = markdown_splitter.split_text(markdown_document)
|
|
|
|
expected_output = [
|
|
{
|
|
"content": "Hi this is Jim \nHi this is Joe",
|
|
"metadata": {"Header 1": "Foo", "Header 2": "Bar"},
|
|
},
|
|
{
|
|
"content": "Hi this is Lance",
|
|
"metadata": {"Header 1": "Foo", "Header 2": "Bar", "Header 3": "Boo"},
|
|
},
|
|
{
|
|
"content": "Hi this is John",
|
|
"metadata": {
|
|
"Header 1": "Foo",
|
|
"Header 2": "Bar",
|
|
"Header 3": "Boo",
|
|
"Header 4": "Bim",
|
|
},
|
|
},
|
|
{
|
|
"content": "Hi this is Molly",
|
|
"metadata": {"Header 1": "Foo", "Header 2": "Baz"},
|
|
},
|
|
]
|
|
|
|
assert output == expected_output
|
|
|
|
|
|
def test_solidity_code_splitter() -> None:
|
|
splitter = RecursiveCharacterTextSplitter.from_language(
|
|
Language.SOL, chunk_size=CHUNK_SIZE, chunk_overlap=0
|
|
)
|
|
code = """pragma solidity ^0.8.20;
|
|
contract HelloWorld {
|
|
function add(uint a, uint b) pure public returns(uint) {
|
|
return a + b;
|
|
}
|
|
}
|
|
"""
|
|
chunks = splitter.split_text(code)
|
|
assert chunks == [
|
|
"pragma solidity",
|
|
"^0.8.20;",
|
|
"contract",
|
|
"HelloWorld {",
|
|
"function",
|
|
"add(uint a,",
|
|
"uint b) pure",
|
|
"public",
|
|
"returns(uint) {",
|
|
"return a",
|
|
"+ b;",
|
|
"}\n }",
|
|
]
|