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76 lines
2.7 KiB
Python
76 lines
2.7 KiB
Python
"""Tests for ChunkerCreator registry + byte-identical classic_chunk parity."""
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from __future__ import annotations
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import pytest
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from application.parser.chunking import Chunker
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from application.parser.chunking_creator import ChunkerCreator
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from application.parser.schema.base import Document
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def _docs():
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"""Representative mix: a small doc, a large splittable doc, a tiny doc."""
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return [
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Document(text="A short paragraph of text.", doc_id="small"),
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Document(text="word " * 4000, doc_id="large"),
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Document(text="tiny", doc_id="below-min"),
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Document(text="header1\nheader2\nheader3\n" + "lorem " * 3000, doc_id="hdr"),
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]
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def _serialize(chunks):
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"""Stable, comparable view of a chunk list."""
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return [(c.doc_id, c.text, c.extra_info) for c in chunks]
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@pytest.mark.unit
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class TestChunkerCreator:
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def test_classic_chunk_is_registered(self):
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assert "classic_chunk" in ChunkerCreator.chunkers
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assert ChunkerCreator.chunkers["classic_chunk"] is Chunker
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def test_create_chunker_returns_chunker(self):
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chunker = ChunkerCreator.create_chunker(
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"classic_chunk", max_tokens=1250, min_tokens=150,
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)
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assert isinstance(chunker, Chunker)
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assert chunker.max_tokens == 1250
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assert chunker.min_tokens == 150
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def test_create_chunker_unknown_strategy_raises(self):
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with pytest.raises(ValueError, match="No chunker class found"):
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ChunkerCreator.create_chunker("does_not_exist")
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def test_register_is_idempotent_and_overrides(self):
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class Dummy:
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def __init__(self, **kwargs):
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self.kwargs = kwargs
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try:
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ChunkerCreator.register("dummy_strategy", Dummy)
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inst = ChunkerCreator.create_chunker("dummy_strategy", x=1)
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assert isinstance(inst, Dummy)
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assert inst.kwargs == {"x": 1}
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finally:
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ChunkerCreator.chunkers.pop("dummy_strategy", None)
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@pytest.mark.unit
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class TestByteIdenticalParity:
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def test_creator_output_matches_direct_chunker(self):
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# The refactor must not change classic_chunk output: a chunker built
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# via ChunkerCreator must produce identical chunks to the old direct
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# ``Chunker(...)`` instantiation for the same input + params.
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params = dict(max_tokens=1250, min_tokens=150, duplicate_headers=False)
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direct = Chunker(chunking_strategy="classic_chunk", **params)
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via_creator = ChunkerCreator.create_chunker(
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"classic_chunk", chunking_strategy="classic_chunk", **params,
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)
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direct_out = direct.chunk(documents=_docs())
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creator_out = via_creator.chunk(documents=_docs())
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assert _serialize(creator_out) == _serialize(direct_out)
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