Automated tests for the context summarization feature.
This commit is contained in:
filipi87
606
tests/test_context_summarization.py
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606
tests/test_context_summarization.py
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#
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# Copyright (c) 2024–2025, Daily
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#
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# SPDX-License-Identifier: BSD 2-Clause License
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#
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"""Tests for context summarization feature."""
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import unittest
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from unittest.mock import AsyncMock, MagicMock, patch
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from pipecat.frames.frames import LLMContextSummaryRequestFrame
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from pipecat.processors.aggregators.llm_context import LLMContext
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from pipecat.services.llm_service import LLMService
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from pipecat.utils.context.llm_context_summarization import (
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LLMContextSummarizationConfig,
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LLMContextSummarizationUtil,
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)
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class TestContextSummarizationMixin(unittest.TestCase):
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"""Tests for LLMContextSummarizationUtil."""
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def test_estimate_tokens_simple_text(self):
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"""Test token estimation with simple text."""
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# Simple sentence: "Hello world" = 11 chars / 4 = 2.75 -> 2 tokens
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tokens = LLMContextSummarizationUtil.estimate_tokens("Hello world")
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self.assertEqual(tokens, 2)
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# More words: "This is a test message" = 22 chars / 4 = 5.5 -> 5 tokens
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tokens = LLMContextSummarizationUtil.estimate_tokens("This is a test message")
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self.assertEqual(tokens, 5)
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def test_estimate_tokens_empty(self):
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"""Test token estimation with empty text."""
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tokens = LLMContextSummarizationUtil.estimate_tokens("")
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self.assertEqual(tokens, 0)
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def test_estimate_context_tokens(self):
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"""Test context token estimation."""
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context = LLMContext()
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# Empty context
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self.assertEqual(LLMContextSummarizationUtil.estimate_context_tokens(context), 0)
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# Add messages
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context.add_message({"role": "system", "content": "You are helpful"}) # ~4 words
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context.add_message({"role": "user", "content": "Hello"}) # ~1 word
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context.add_message({"role": "assistant", "content": "Hi there"}) # ~2 words
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# Each message has ~10 token overhead
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# Total content: ~7 words * 1.3 = ~9 tokens
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# Total overhead: 3 * 10 = 30 tokens
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# Expected: ~39 tokens
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total = LLMContextSummarizationUtil.estimate_context_tokens(context)
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self.assertGreater(total, 30) # At least overhead
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self.assertLess(total, 50) # Not too much
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def test_get_messages_to_summarize_basic(self):
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"""Test basic message extraction for summarization."""
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context = LLMContext()
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# Add messages
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context.add_message({"role": "system", "content": "System prompt"})
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context.add_message({"role": "user", "content": "Message 1"})
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context.add_message({"role": "assistant", "content": "Response 1"})
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context.add_message({"role": "user", "content": "Message 2"})
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context.add_message({"role": "assistant", "content": "Response 2"})
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context.add_message({"role": "user", "content": "Message 3"})
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context.add_message({"role": "assistant", "content": "Response 3"})
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# Keep last 2 messages
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result = LLMContextSummarizationUtil.get_messages_to_summarize(context, 2)
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# Get first system message from context
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first_system = None
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for msg in context.messages:
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if msg.get("role") == "system":
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first_system = msg
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break
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# Should get system message
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self.assertIsNotNone(first_system)
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self.assertEqual(first_system["content"], "System prompt")
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# Should get middle messages (indices 1-4)
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self.assertEqual(len(result.messages), 4)
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self.assertEqual(result.messages[0]["content"], "Message 1")
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self.assertEqual(result.messages[-1]["content"], "Response 2")
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# Last index should be 4 (0-indexed)
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self.assertEqual(result.last_summarized_index, 4)
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def test_get_messages_to_summarize_no_system(self):
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"""Test message extraction when there's no system message."""
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context = LLMContext()
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# Add messages without system prompt
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context.add_message({"role": "user", "content": "Message 1"})
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context.add_message({"role": "assistant", "content": "Response 1"})
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context.add_message({"role": "user", "content": "Message 2"})
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context.add_message({"role": "assistant", "content": "Response 2"})
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# Keep last 1 message
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result = LLMContextSummarizationUtil.get_messages_to_summarize(context, 1)
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# Get first system message from context
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first_system = None
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for msg in context.messages:
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if msg.get("role") == "system":
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first_system = msg
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break
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# Should have no system message
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self.assertIsNone(first_system)
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# Should get first 3 messages
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self.assertEqual(len(result.messages), 3)
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self.assertEqual(result.last_summarized_index, 2)
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def test_get_messages_to_summarize_insufficient(self):
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"""Test when there aren't enough messages to summarize."""
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context = LLMContext()
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# Add only 2 messages
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context.add_message({"role": "user", "content": "Message 1"})
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context.add_message({"role": "assistant", "content": "Response 1"})
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# Try to keep 2 messages (same as total)
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result = LLMContextSummarizationUtil.get_messages_to_summarize(context, 2)
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# Should return empty
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self.assertEqual(len(result.messages), 0)
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self.assertEqual(result.last_summarized_index, -1)
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def test_format_messages_for_summary(self):
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"""Test message formatting for summary."""
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messages = [
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{"role": "user", "content": "Hello"},
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{"role": "assistant", "content": "Hi there"},
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{"role": "user", "content": "How are you?"},
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]
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transcript = LLMContextSummarizationUtil.format_messages_for_summary(messages)
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self.assertIn("USER: Hello", transcript)
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self.assertIn("ASSISTANT: Hi there", transcript)
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self.assertIn("USER: How are you?", transcript)
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def test_format_messages_with_list_content(self):
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"""Test formatting messages with list content."""
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messages = [
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{
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"role": "user",
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"content": [
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{"type": "text", "text": "First part"},
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{"type": "text", "text": "Second part"},
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],
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}
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]
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transcript = LLMContextSummarizationUtil.format_messages_for_summary(messages)
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self.assertIn("USER: First part Second part", transcript)
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class TestLLMContextSummarizationConfig(unittest.TestCase):
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"""Tests for LLMContextSummarizationConfig."""
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def test_default_config(self):
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"""Test default configuration values."""
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config = LLMContextSummarizationConfig()
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self.assertEqual(config.max_context_tokens, 8000)
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self.assertEqual(config.max_unsummarized_messages, 20)
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self.assertEqual(config.min_messages_after_summary, 4)
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self.assertIsNone(config.summarization_prompt)
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def test_custom_config(self):
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"""Test custom configuration."""
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config = LLMContextSummarizationConfig(
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max_context_tokens=2500,
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target_context_tokens=2000,
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max_unsummarized_messages=15,
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min_messages_after_summary=4,
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summarization_prompt="Custom prompt",
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)
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self.assertEqual(config.max_context_tokens, 2500)
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self.assertEqual(config.target_context_tokens, 2000)
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self.assertEqual(config.max_unsummarized_messages, 15)
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self.assertEqual(config.min_messages_after_summary, 4)
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self.assertEqual(config.summary_prompt, "Custom prompt")
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def test_summary_prompt_property(self):
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"""Test summary_prompt property uses default when None."""
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config = LLMContextSummarizationConfig()
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self.assertIn("summarizing a conversation", config.summary_prompt.lower())
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config_with_custom = LLMContextSummarizationConfig(summarization_prompt="Custom")
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self.assertEqual(config_with_custom.summary_prompt, "Custom")
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class TestFunctionCallHandling(unittest.TestCase):
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"""Tests for function call handling in summarization."""
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def test_function_call_in_progress_not_summarized(self):
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"""Test that messages with function calls in progress are not summarized."""
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context = LLMContext()
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# Add messages including a function call without result
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context.add_message({"role": "system", "content": "System prompt"})
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context.add_message({"role": "user", "content": "What time is it?"})
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context.add_message(
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{
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"role": "assistant",
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"content": "",
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"tool_calls": [
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{
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"id": "call_123",
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"type": "function",
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"function": {"name": "get_time", "arguments": "{}"},
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}
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],
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}
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)
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# No tool result yet - function call is in progress
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context.add_message({"role": "user", "content": "Latest message"})
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# Try to keep last 1 message
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result = LLMContextSummarizationUtil.get_messages_to_summarize(context, 1)
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# Should only get the first user message, stopping before the function call
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self.assertEqual(len(result.messages), 1)
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self.assertEqual(result.messages[0]["content"], "What time is it?")
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self.assertEqual(result.last_summarized_index, 1)
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def test_completed_function_call_can_be_summarized(self):
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"""Test that completed function calls can be summarized."""
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context = LLMContext()
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# Add messages including a complete function call sequence
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context.add_message({"role": "system", "content": "System prompt"})
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context.add_message({"role": "user", "content": "What time is it?"})
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context.add_message(
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{
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"role": "assistant",
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"content": "",
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"tool_calls": [
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{
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"id": "call_123",
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"type": "function",
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"function": {"name": "get_time", "arguments": "{}"},
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}
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],
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}
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)
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# Tool result completes the function call
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context.add_message(
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{"role": "tool", "tool_call_id": "call_123", "content": '{"time": "10:30 AM"}'}
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)
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context.add_message({"role": "assistant", "content": "It's 10:30 AM"})
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context.add_message({"role": "user", "content": "Latest message"})
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# Try to keep last 1 message
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result = LLMContextSummarizationUtil.get_messages_to_summarize(context, 1)
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# Should get all messages except the last one (complete function call is included)
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self.assertEqual(len(result.messages), 4)
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self.assertEqual(result.messages[0]["content"], "What time is it?")
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self.assertEqual(result.messages[-1]["content"], "It's 10:30 AM")
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self.assertEqual(result.last_summarized_index, 4)
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def test_multiple_function_calls_in_progress(self):
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"""Test handling of multiple function calls in progress."""
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context = LLMContext()
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# Add messages with multiple function calls
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context.add_message({"role": "system", "content": "System prompt"})
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context.add_message({"role": "user", "content": "Message 1"})
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context.add_message({"role": "assistant", "content": "Response 1"})
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context.add_message({"role": "user", "content": "What's the time and date?"})
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context.add_message(
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{
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"role": "assistant",
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"content": "",
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"tool_calls": [
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{
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"id": "call_time",
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"type": "function",
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"function": {"name": "get_time", "arguments": "{}"},
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},
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{
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"id": "call_date",
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"type": "function",
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"function": {"name": "get_date", "arguments": "{}"},
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},
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],
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}
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)
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# Only one tool result - other call still in progress
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context.add_message(
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{"role": "tool", "tool_call_id": "call_time", "content": '{"time": "10:30 AM"}'}
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)
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context.add_message({"role": "user", "content": "Latest message"})
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# Try to keep last 1 message
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result = LLMContextSummarizationUtil.get_messages_to_summarize(context, 1)
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# Should stop before the function call that's in progress
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# Messages to summarize: indices 1, 2, 3 (stops before index 4 where incomplete call is)
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self.assertEqual(len(result.messages), 3)
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self.assertEqual(result.last_summarized_index, 3)
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def test_multiple_completed_function_calls(self):
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"""Test that multiple completed function calls can be summarized."""
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context = LLMContext()
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# Add messages with multiple completed function calls
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context.add_message({"role": "system", "content": "System prompt"})
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context.add_message({"role": "user", "content": "What's the time and date?"})
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context.add_message(
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{
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"role": "assistant",
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"content": "",
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"tool_calls": [
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{
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"id": "call_time",
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"type": "function",
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"function": {"name": "get_time", "arguments": "{}"},
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},
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{
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"id": "call_date",
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"type": "function",
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"function": {"name": "get_date", "arguments": "{}"},
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},
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],
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}
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)
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# Both tool results provided
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context.add_message(
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{"role": "tool", "tool_call_id": "call_time", "content": '{"time": "10:30 AM"}'}
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)
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context.add_message(
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{
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"role": "tool",
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"tool_call_id": "call_date",
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"content": '{"date": "January 1, 2024"}',
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}
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)
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context.add_message({"role": "assistant", "content": "It's 10:30 AM on January 1, 2024"})
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context.add_message({"role": "user", "content": "Latest message"})
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# Try to keep last 1 message
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result = LLMContextSummarizationUtil.get_messages_to_summarize(context, 1)
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# Should get all messages except the last one (all function calls completed)
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self.assertEqual(len(result.messages), 5)
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self.assertEqual(result.last_summarized_index, 5)
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def test_sequential_function_calls_mixed_completion(self):
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"""Test sequential function calls with mixed completion states."""
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context = LLMContext()
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# Add messages with sequential function calls
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context.add_message({"role": "system", "content": "System prompt"})
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# First function call - completed
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context.add_message({"role": "user", "content": "What time is it?"})
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context.add_message(
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{
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"role": "assistant",
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"content": "",
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"tool_calls": [
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{
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"id": "call_1",
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"type": "function",
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"function": {"name": "get_time", "arguments": "{}"},
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}
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],
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}
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)
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context.add_message(
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{"role": "tool", "tool_call_id": "call_1", "content": '{"time": "10:30 AM"}'}
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)
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context.add_message({"role": "assistant", "content": "It's 10:30 AM"})
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# Second function call - in progress
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context.add_message({"role": "user", "content": "What's the date?"})
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context.add_message(
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{
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"role": "assistant",
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"content": "",
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"tool_calls": [
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{
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"id": "call_2",
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"type": "function",
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"function": {"name": "get_date", "arguments": "{}"},
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}
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],
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}
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)
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# No result for call_2 yet
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context.add_message({"role": "user", "content": "Latest message"})
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# Try to keep last 1 message
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result = LLMContextSummarizationUtil.get_messages_to_summarize(context, 1)
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# Should get messages up to and including the first completed function call
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# but stop before the second function call that's in progress
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# Messages to summarize: indices 1, 2, 3, 4, 5 (stops before index 6 where incomplete call is)
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self.assertEqual(len(result.messages), 5)
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self.assertEqual(result.messages[-1]["content"], "What's the date?")
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self.assertEqual(result.last_summarized_index, 5)
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def test_function_call_formatting_in_transcript(self):
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"""Test that function calls are properly formatted in transcript."""
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messages = [
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{"role": "user", "content": "What time is it?"},
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{
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"role": "assistant",
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"content": "",
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"tool_calls": [
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{
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"id": "call_123",
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"type": "function",
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"function": {"name": "get_time", "arguments": "{}"},
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}
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],
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},
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{"role": "tool", "tool_call_id": "call_123", "content": '{"time": "10:30 AM"}'},
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{"role": "assistant", "content": "It's 10:30 AM"},
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]
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transcript = LLMContextSummarizationUtil.format_messages_for_summary(messages)
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# Check that function call is included
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self.assertIn("TOOL_CALL: get_time({})", transcript)
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# Check that tool result is included
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self.assertIn('TOOL_RESULT[call_123]: {"time": "10:30 AM"}', transcript)
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def test_no_function_calls(self):
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"""Test that summarization works normally without function calls."""
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context = LLMContext()
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# Add normal conversation without function calls
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context.add_message({"role": "system", "content": "System prompt"})
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context.add_message({"role": "user", "content": "Hello"})
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context.add_message({"role": "assistant", "content": "Hi"})
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context.add_message({"role": "user", "content": "How are you?"})
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context.add_message({"role": "assistant", "content": "I'm good"})
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context.add_message({"role": "user", "content": "Latest message"})
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# Try to keep last 1 message
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result = LLMContextSummarizationUtil.get_messages_to_summarize(context, 1)
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|
||||
# Should get all messages except the last one
|
||||
self.assertEqual(len(result.messages), 4)
|
||||
self.assertEqual(result.last_summarized_index, 4)
|
||||
|
||||
|
||||
class TestSummaryGenerationExceptions(unittest.IsolatedAsyncioTestCase):
|
||||
"""Tests for summary generation exception handling."""
|
||||
|
||||
async def test_generate_summary_raises_on_no_messages(self):
|
||||
"""Test that _generate_summary raises RuntimeError when there are no messages to summarize."""
|
||||
llm_service = LLMService()
|
||||
context = LLMContext()
|
||||
|
||||
# Add only one message (system), which isn't enough to summarize
|
||||
context.add_message({"role": "system", "content": "System prompt"})
|
||||
|
||||
frame = LLMContextSummaryRequestFrame(
|
||||
request_id="test",
|
||||
context=context,
|
||||
min_messages_to_keep=1,
|
||||
target_context_tokens=1000,
|
||||
summarization_prompt="Summarize this",
|
||||
)
|
||||
|
||||
with self.assertRaises(RuntimeError) as cm:
|
||||
await llm_service._generate_summary(frame)
|
||||
|
||||
self.assertEqual(str(cm.exception), "No messages to summarize")
|
||||
|
||||
async def test_generate_summary_raises_on_no_run_inference(self):
|
||||
"""Test that _generate_summary raises RuntimeError when run_inference is not implemented."""
|
||||
# Create a minimal LLM service - base class raises NotImplementedError
|
||||
llm_service = LLMService()
|
||||
|
||||
context = LLMContext()
|
||||
context.add_message({"role": "user", "content": "Message 1"})
|
||||
context.add_message({"role": "assistant", "content": "Response 1"})
|
||||
context.add_message({"role": "user", "content": "Message 2"})
|
||||
|
||||
frame = LLMContextSummaryRequestFrame(
|
||||
request_id="test",
|
||||
context=context,
|
||||
min_messages_to_keep=1,
|
||||
target_context_tokens=1000,
|
||||
summarization_prompt="Summarize this",
|
||||
)
|
||||
|
||||
with self.assertRaises(RuntimeError) as cm:
|
||||
await llm_service._generate_summary(frame)
|
||||
|
||||
self.assertIn("does not implement run_inference", str(cm.exception))
|
||||
self.assertIn("LLMService", str(cm.exception))
|
||||
|
||||
async def test_generate_summary_raises_on_empty_response(self):
|
||||
"""Test that _generate_summary raises RuntimeError when LLM returns empty summary."""
|
||||
llm_service = LLMService()
|
||||
# Mock run_inference to return None
|
||||
llm_service.run_inference = AsyncMock(return_value=None)
|
||||
|
||||
context = LLMContext()
|
||||
context.add_message({"role": "user", "content": "Message 1"})
|
||||
context.add_message({"role": "assistant", "content": "Response 1"})
|
||||
context.add_message({"role": "user", "content": "Message 2"})
|
||||
|
||||
frame = LLMContextSummaryRequestFrame(
|
||||
request_id="test",
|
||||
context=context,
|
||||
min_messages_to_keep=1,
|
||||
target_context_tokens=1000,
|
||||
summarization_prompt="Summarize this",
|
||||
)
|
||||
|
||||
with self.assertRaises(RuntimeError) as cm:
|
||||
await llm_service._generate_summary(frame)
|
||||
|
||||
self.assertEqual(str(cm.exception), "LLM returned empty summary")
|
||||
|
||||
async def test_generate_summary_task_handles_exceptions(self):
|
||||
"""Test that _generate_summary_task properly handles exceptions from _generate_summary."""
|
||||
llm_service = LLMService()
|
||||
|
||||
# Mock broadcast_frame to capture the result
|
||||
broadcast_calls = []
|
||||
|
||||
async def mock_broadcast(frame_class, **kwargs):
|
||||
broadcast_calls.append((frame_class, kwargs))
|
||||
|
||||
llm_service.broadcast_frame = mock_broadcast
|
||||
|
||||
# Mock push_error
|
||||
llm_service.push_error = AsyncMock()
|
||||
|
||||
context = LLMContext()
|
||||
context.add_message({"role": "system", "content": "System prompt"})
|
||||
|
||||
frame = LLMContextSummaryRequestFrame(
|
||||
request_id="test_123",
|
||||
context=context,
|
||||
min_messages_to_keep=1,
|
||||
target_context_tokens=1000,
|
||||
summarization_prompt="Summarize this",
|
||||
)
|
||||
|
||||
# Execute the task
|
||||
await llm_service._generate_summary_task(frame)
|
||||
|
||||
# Verify broadcast_frame was called with error
|
||||
self.assertEqual(len(broadcast_calls), 1)
|
||||
frame_class, kwargs = broadcast_calls[0]
|
||||
self.assertEqual(kwargs["request_id"], "test_123")
|
||||
self.assertEqual(kwargs["summary"], "")
|
||||
self.assertEqual(kwargs["last_summarized_index"], -1)
|
||||
self.assertEqual(
|
||||
kwargs["error"], "Error generating context summary: No messages to summarize"
|
||||
)
|
||||
|
||||
# Verify push_error was called
|
||||
llm_service.push_error.assert_called_once()
|
||||
|
||||
async def test_generate_summary_success(self):
|
||||
"""Test that _generate_summary returns successfully with valid input."""
|
||||
llm_service = LLMService()
|
||||
# Mock run_inference to return a summary
|
||||
llm_service.run_inference = AsyncMock(return_value="This is a summary of the conversation")
|
||||
|
||||
context = LLMContext()
|
||||
context.add_message({"role": "user", "content": "Message 1"})
|
||||
context.add_message({"role": "assistant", "content": "Response 1"})
|
||||
context.add_message({"role": "user", "content": "Message 2"})
|
||||
|
||||
frame = LLMContextSummaryRequestFrame(
|
||||
request_id="test",
|
||||
context=context,
|
||||
min_messages_to_keep=1,
|
||||
target_context_tokens=1000,
|
||||
summarization_prompt="Summarize this",
|
||||
)
|
||||
|
||||
summary, last_index = await llm_service._generate_summary(frame)
|
||||
|
||||
self.assertEqual(summary, "This is a summary of the conversation")
|
||||
self.assertGreater(last_index, -1)
|
||||
self.assertEqual(last_index, 1) # Should be the index of the last summarized message
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
unittest.main()
|
||||
Reference in New Issue
Block a user