mirror of
https://github.com/hwchase17/langchain
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58 lines
1.7 KiB
Python
58 lines
1.7 KiB
Python
"""Test HyDE."""
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from typing import List, Optional
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import numpy as np
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from pydantic import BaseModel
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from langchain.chains.hyde.base import HypotheticalDocumentEmbedder
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from langchain.chains.hyde.prompts import PROMPT_MAP
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from langchain.embeddings.base import Embeddings
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from langchain.llms.base import BaseLLM
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from langchain.schema import Generation, LLMResult
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class FakeEmbeddings(Embeddings):
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"""Fake embedding class for tests."""
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def embed_documents(self, texts: List[str]) -> List[List[float]]:
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"""Return random floats."""
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return [list(np.random.uniform(0, 1, 10)) for _ in range(10)]
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def embed_query(self, text: str) -> List[float]:
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"""Return random floats."""
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return list(np.random.uniform(0, 1, 10))
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class FakeLLM(BaseLLM, BaseModel):
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"""Fake LLM wrapper for testing purposes."""
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n: int = 1
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def _generate(
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self, prompts: List[str], stop: Optional[List[str]] = None
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) -> LLMResult:
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return LLMResult(generations=[[Generation(text="foo") for _ in range(self.n)]])
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@property
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def _llm_type(self) -> str:
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"""Return type of llm."""
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return "fake"
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def test_hyde_from_llm() -> None:
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"""Test loading HyDE from all prompts."""
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for key in PROMPT_MAP:
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embedding = HypotheticalDocumentEmbedder.from_llm(
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FakeLLM(), FakeEmbeddings(), key
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)
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embedding.embed_query("foo")
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def test_hyde_from_llm_with_multiple_n() -> None:
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"""Test loading HyDE from all prompts."""
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for key in PROMPT_MAP:
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embedding = HypotheticalDocumentEmbedder.from_llm(
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FakeLLM(n=8), FakeEmbeddings(), key
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)
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embedding.embed_query("foo")
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