langchain/tests/integration_tests/chains/test_memory.py

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"""Test memory functionality."""
from langchain.chains.conversation.memory import ConversationSummaryBufferMemory
from tests.unit_tests.llms.fake_llm import FakeLLM
def test_summary_buffer_memory_no_buffer_yet() -> None:
"""Test ConversationSummaryBufferMemory when no inputs put in buffer yet."""
memory = ConversationSummaryBufferMemory(llm=FakeLLM(), memory_key="baz")
output = memory.load_memory_variables({})
assert output == {"baz": ""}
def test_summary_buffer_memory_buffer_only() -> None:
"""Test ConversationSummaryBufferMemory when only buffer."""
memory = ConversationSummaryBufferMemory(llm=FakeLLM(), memory_key="baz")
memory.save_context({"input": "bar"}, {"output": "foo"})
assert memory.buffer == ["Human: bar\nAI: foo"]
output = memory.load_memory_variables({})
assert output == {"baz": "Human: bar\nAI: foo"}
def test_summary_buffer_memory_summary() -> None:
"""Test ConversationSummaryBufferMemory when only buffer."""
memory = ConversationSummaryBufferMemory(
llm=FakeLLM(), memory_key="baz", max_token_limit=13
)
memory.save_context({"input": "bar"}, {"output": "foo"})
memory.save_context({"input": "bar1"}, {"output": "foo1"})
assert memory.buffer == ["Human: bar1\nAI: foo1"]
output = memory.load_memory_variables({})
assert output == {"baz": "foo\nHuman: bar1\nAI: foo1"}