test_chat_models.py

"""Test ChatAnthropic chat model."""

import json
from base64 import b64encode
from typing import List, Optional

import pytest
import requests
from langchain_core.callbacks import CallbackManager
from langchain_core.messages import (
    AIMessage,
    AIMessageChunk,
    BaseMessage,
    BaseMessageChunk,
    HumanMessage,
    SystemMessage,
    ToolMessage,
)
from langchain_core.outputs import ChatGeneration, LLMResult
from langchain_core.prompts import ChatPromptTemplate
from langchain_core.tools import tool
from pydantic import BaseModel, Field

from langchain_anthropic import ChatAnthropic, ChatAnthropicMessages
from tests.unit_tests._utils import FakeCallbackHandler

MODEL_NAME = "claude-3-5-sonnet-20240620"


def test_stream() -> None:
    """Test streaming tokens from Anthropic."""
    llm = ChatAnthropicMessages(model_name=MODEL_NAME)  # type: ignore[call-arg, call-arg]

    full: Optional[BaseMessageChunk] = None
    chunks_with_input_token_counts = 0
    chunks_with_output_token_counts = 0
    for token in llm.stream("I'm Pickle Rick"):
        assert isinstance(token.content, str)
        full = token if full is None else full + token
        assert isinstance(token, AIMessageChunk)
        if token.usage_metadata is not None:
            if token.usage_metadata.get("input_tokens"):
                chunks_with_input_token_counts += 1
            elif token.usage_metadata.get("output_tokens"):
                chunks_with_output_token_counts += 1
    if chunks_with_input_token_counts != 1 or chunks_with_output_token_counts != 1:
        raise AssertionError(
            "Expected exactly one chunk with input or output token counts. "
            "AIMessageChunk aggregation adds counts. Check that "
            "this is behaving properly."
        )
    # check token usage is populated
    assert isinstance(full, AIMessageChunk)
    assert full.usage_metadata is not None
    assert full.usage_metadata["input_tokens"] > 0
    assert full.usage_metadata["output_tokens"] > 0
    assert full.usage_metadata["total_tokens"] > 0
    assert (
        full.usage_metadata["input_tokens"] + full.usage_metadata["output_tokens"]
        == full.usage_metadata["total_tokens"]
    )
    assert "stop_reason" in full.response_metadata
    assert "stop_sequence" in full.response_metadata


async def test_astream() -> None:
    """Test streaming tokens from Anthropic."""
    llm = ChatAnthropicMessages(model_name=MODEL_NAME)  # type: ignore[call-arg, call-arg]

    full: Optional[BaseMessageChunk] = None
    chunks_with_input_token_counts = 0
    chunks_with_output_token_counts = 0
    async for token in llm.astream("I'm Pickle Rick"):
        assert isinstance(token.content, str)
        full = token if full is None else full + token
        assert isinstance(token, AIMessageChunk)
        if token.usage_metadata is not None:
            if token.usage_metadata.get("input_tokens"):
                chunks_with_input_token_counts += 1
            elif token.usage_metadata.get("output_tokens"):
                chunks_with_output_token_counts += 1
    if chunks_with_input_token_counts != 1 or chunks_with_output_token_counts != 1:
        raise AssertionError(
            "Expected exactly one chunk with input or output token counts. "
            "AIMessageChunk aggregation adds counts. Check that "
            "this is behaving properly."
        )
    # check token usage is populated
    assert isinstance(full, AIMessageChunk)
    assert full.usage_metadata is not None
    assert full.usage_metadata["input_tokens"] > 0
    assert full.usage_metadata["output_tokens"] > 0
    assert full.usage_metadata["total_tokens"] > 0
    assert (
        full.usage_metadata["input_tokens"] + full.usage_metadata["output_tokens"]
        == full.usage_metadata["total_tokens"]
    )
    assert "stop_reason" in full.response_metadata
    assert "stop_sequence" in full.response_metadata

    # test usage metadata can be excluded
    model = ChatAnthropic(model_name=MODEL_NAME, stream_usage=False)  # type: ignore[call-arg]
    async for token in model.astream("hi"):
        assert isinstance(token, AIMessageChunk)
        assert token.usage_metadata is None
    # check we override with kwarg
    model = ChatAnthropic(model_name=MODEL_NAME)  # type: ignore[call-arg]
    assert model.stream_usage
    async for token in model.astream("hi", stream_usage=False):
        assert isinstance(token, AIMessageChunk)
        assert token.usage_metadata is None

    # Check expected raw API output
    async_client = model._async_client
    params: dict = {
        "model": "claude-3-haiku-20240307",
        "max_tokens": 1024,
        "messages": [{"role": "user", "content": "hi"}],
        "temperature": 0.0,
    }
    stream = await async_client.messages.create(**params, stream=True)
    async for event in stream:
        if event.type == "message_start":
            assert event.message.usage.input_tokens > 1
            # Note: this single output token included in message start event
            # does not appear to contribute to overall output token counts. It
            # is excluded from the total token count.
            assert event.message.usage.output_tokens == 1
        elif event.type == "message_delta":
            assert event.usage.output_tokens > 1
        else:
            pass


async def test_abatch() -> None:
    """Test streaming tokens from ChatAnthropicMessages."""
    llm = ChatAnthropicMessages(model_name=MODEL_NAME)  # type: ignore[call-arg, call-arg]

    result = await llm.abatch(["I'm Pickle Rick", "I'm not Pickle Rick"])
    for token in result:
        assert isinstance(token.content, str)


async def test_abatch_tags() -> None:
    """Test batch tokens from ChatAnthropicMessages."""
    llm = ChatAnthropicMessages(model_name=MODEL_NAME)  # type: ignore[call-arg, call-arg]

    result = await llm.abatch(
        ["I'm Pickle Rick", "I'm not Pickle Rick"], config={"tags": ["foo"]}
    )
    for token in result:
        assert isinstance(token.content, str)


async def test_async_tool_use() -> None:
    llm = ChatAnthropic(
        model=MODEL_NAME,
    )

    llm_with_tools = llm.bind_tools(
        [
            {
                "name": "get_weather",
                "description": "Get weather report for a city",
                "input_schema": {
                    "type": "object",
                    "properties": {"location": {"type": "string"}},
                },
            }
        ]
    )
    response = await llm_with_tools.ainvoke("what's the weather in san francisco, ca")
    assert isinstance(response, AIMessage)
    assert isinstance(response.content, list)
    assert isinstance(response.tool_calls, list)
    assert len(response.tool_calls) == 1
    tool_call = response.tool_calls[0]
    assert tool_call["name"] == "get_weather"
    assert isinstance(tool_call["args"], dict)
    assert "location" in tool_call["args"]

    # Test streaming
    first = True
    chunks = []  # type: ignore
    async for chunk in llm_with_tools.astream(
        "what's the weather in san francisco, ca"
    ):
        chunks = chunks + [chunk]
        if first:
            gathered = chunk
            first = False
        else:
            gathered = gathered + chunk  # type: ignore
    assert len(chunks) > 1
    assert isinstance(gathered, AIMessageChunk)
    assert isinstance(gathered.tool_call_chunks, list)
    assert len(gathered.tool_call_chunks) == 1
    tool_call_chunk = gathered.tool_call_chunks[0]
    assert tool_call_chunk["name"] == "get_weather"
    assert isinstance(tool_call_chunk["args"], str)
    assert "location" in json.loads(tool_call_chunk["args"])


def test_batch() -> None:
    """Test batch tokens from ChatAnthropicMessages."""
    llm = ChatAnthropicMessages(model_name=MODEL_NAME)  # type: ignore[call-arg, call-arg]

    result = llm.batch(["I'm Pickle Rick", "I'm not Pickle Rick"])
    for token in result:
        assert isinstance(token.content, str)


async def test_ainvoke() -> None:
    """Test invoke tokens from ChatAnthropicMessages."""
    llm = ChatAnthropicMessages(model_name=MODEL_NAME)  # type: ignore[call-arg, call-arg]

    result = await llm.ainvoke("I'm Pickle Rick", config={"tags": ["foo"]})
    assert isinstance(result.content, str)


def test_invoke() -> None:
    """Test invoke tokens from ChatAnthropicMessages."""
    llm = ChatAnthropicMessages(model_name=MODEL_NAME)  # type: ignore[call-arg, call-arg]

    result = llm.invoke("I'm Pickle Rick", config=dict(tags=["foo"]))
    assert isinstance(result.content, str)


def test_system_invoke() -> None:
    """Test invoke tokens with a system message"""
    llm = ChatAnthropicMessages(model_name=MODEL_NAME)  # type: ignore[call-arg, call-arg]

    prompt = ChatPromptTemplate.from_messages(
        [
            (
                "system",
                "You are an expert cartographer. If asked, you are a cartographer. "
                "STAY IN CHARACTER",
            ),
            ("human", "Are you a mathematician?"),
        ]
    )

    chain = prompt | llm

    result = chain.invoke({})
    assert isinstance(result.content, str)


def test_anthropic_call() -> None:
    """Test valid call to anthropic."""
    chat = ChatAnthropic(model=MODEL_NAME)
    message = HumanMessage(content="Hello")
    response = chat.invoke([message])
    assert isinstance(response, AIMessage)
    assert isinstance(response.content, str)


def test_anthropic_generate() -> None:
    """Test generate method of anthropic."""
    chat = ChatAnthropic(model=MODEL_NAME)
    chat_messages: List[List[BaseMessage]] = [
        [HumanMessage(content="How many toes do dogs have?")]
    ]
    messages_copy = [messages.copy() for messages in chat_messages]
    result: LLMResult = chat.generate(chat_messages)
    assert isinstance(result, LLMResult)
    for response in result.generations[0]:
        assert isinstance(response, ChatGeneration)
        assert isinstance(response.text, str)
        assert response.text == response.message.content
    assert chat_messages == messages_copy


def test_anthropic_streaming() -> None:
    """Test streaming tokens from anthropic."""
    chat = ChatAnthropic(model=MODEL_NAME)
    message = HumanMessage(content="Hello")
    response = chat.stream([message])
    for token in response:
        assert isinstance(token, AIMessageChunk)
        assert isinstance(token.content, str)


def test_anthropic_streaming_callback() -> None:
    """Test that streaming correctly invokes on_llm_new_token callback."""
    callback_handler = FakeCallbackHandler()
    callback_manager = CallbackManager([callback_handler])
    chat = ChatAnthropic(
        model=MODEL_NAME,
        callback_manager=callback_manager,
        verbose=True,
    )
    message = HumanMessage(content="Write me a sentence with 10 words.")
    for token in chat.stream([message]):
        assert isinstance(token, AIMessageChunk)
        assert isinstance(token.content, str)
    assert callback_handler.llm_streams > 1


async def test_anthropic_async_streaming_callback() -> None:
    """Test that streaming correctly invokes on_llm_new_token callback."""
    callback_handler = FakeCallbackHandler()
    callback_manager = CallbackManager([callback_handler])
    chat = ChatAnthropic(
        model=MODEL_NAME,
        callback_manager=callback_manager,
        verbose=True,
    )
    chat_messages: List[BaseMessage] = [
        HumanMessage(content="How many toes do dogs have?")
    ]
    async for token in chat.astream(chat_messages):
        assert isinstance(token, AIMessageChunk)
        assert isinstance(token.content, str)
    assert callback_handler.llm_streams > 1


def test_anthropic_multimodal() -> None:
    """Test that multimodal inputs are handled correctly."""
    chat = ChatAnthropic(model=MODEL_NAME)
    messages: list[BaseMessage] = [
        HumanMessage(
            content=[
                {
                    "type": "image_url",
                    "image_url": {
                        # langchain logo
                        "url": "data:image/jpeg;base64,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",  # noqa: E501
                    },
                },
                {"type": "text", "text": "What is this a logo for?"},
            ]
        )
    ]
    response = chat.invoke(messages)
    assert isinstance(response, AIMessage)
    assert isinstance(response.content, str)
    num_tokens = chat.get_num_tokens_from_messages(messages)
    assert num_tokens > 0


def test_streaming() -> None:
    """Test streaming tokens from Anthropic."""
    callback_handler = FakeCallbackHandler()
    callback_manager = CallbackManager([callback_handler])

    llm = ChatAnthropicMessages(  # type: ignore[call-arg, call-arg]
        model_name=MODEL_NAME, streaming=True, callback_manager=callback_manager
    )

    response = llm.generate([[HumanMessage(content="I'm Pickle Rick")]])
    assert callback_handler.llm_streams > 0
    assert isinstance(response, LLMResult)


async def test_astreaming() -> None:
    """Test streaming tokens from Anthropic."""
    callback_handler = FakeCallbackHandler()
    callback_manager = CallbackManager([callback_handler])

    llm = ChatAnthropicMessages(  # type: ignore[call-arg, call-arg]
        model_name=MODEL_NAME, streaming=True, callback_manager=callback_manager
    )

    response = await llm.agenerate([[HumanMessage(content="I'm Pickle Rick")]])
    assert callback_handler.llm_streams > 0
    assert isinstance(response, LLMResult)


def test_tool_use() -> None:
    llm = ChatAnthropic(model=MODEL_NAME)
    llm_with_tools = llm.bind_tools(
        [
            {
                "name": "get_weather",
                "description": "Get weather report for a city",
                "input_schema": {
                    "type": "object",
                    "properties": {"location": {"type": "string"}},
                },
            }
        ]
    )
    response = llm_with_tools.invoke("what's the weather in san francisco, ca")
    assert isinstance(response, AIMessage)
    assert isinstance(response.content, list)
    assert isinstance(response.tool_calls, list)
    assert len(response.tool_calls) == 1
    tool_call = response.tool_calls[0]
    assert tool_call["name"] == "get_weather"
    assert isinstance(tool_call["args"], dict)
    assert "location" in tool_call["args"]

    # Test streaming
    input = "how are you? what's the weather in san francisco, ca"
    first = True
    chunks = []  # type: ignore
    for chunk in llm_with_tools.stream(input):
        chunks = chunks + [chunk]
        if first:
            gathered = chunk
            first = False
        else:
            gathered = gathered + chunk  # type: ignore
    assert len(chunks) > 1
    assert isinstance(gathered.content, list)
    assert len(gathered.content) == 2
    tool_use_block = None
    for content_block in gathered.content:
        assert isinstance(content_block, dict)
        if content_block["type"] == "tool_use":
            tool_use_block = content_block
            break
    assert tool_use_block is not None
    assert tool_use_block["name"] == "get_weather"
    assert "location" in json.loads(tool_use_block["partial_json"])
    assert isinstance(gathered, AIMessageChunk)
    assert isinstance(gathered.tool_calls, list)
    assert len(gathered.tool_calls) == 1
    tool_call = gathered.tool_calls[0]
    assert tool_call["name"] == "get_weather"
    assert isinstance(tool_call["args"], dict)
    assert "location" in tool_call["args"]
    assert tool_call["id"] is not None

    # Test passing response back to model
    stream = llm_with_tools.stream(
        [
            input,
            gathered,
            ToolMessage(content="sunny and warm", tool_call_id=tool_call["id"]),
        ]
    )
    chunks = []  # type: ignore
    first = True
    for chunk in stream:
        chunks = chunks + [chunk]
        if first:
            gathered = chunk
            first = False
        else:
            gathered = gathered + chunk  # type: ignore
    assert len(chunks) > 1


class GenerateUsername(BaseModel):
    "Get a username based on someone's name and hair color."

    name: str
    hair_color: str


def test_disable_parallel_tool_calling() -> None:
    llm = ChatAnthropic(model="claude-3-5-sonnet-20241022")
    llm_with_tools = llm.bind_tools([GenerateUsername], parallel_tool_calls=False)
    result = llm_with_tools.invoke(
        "Use the GenerateUsername tool to generate user names for:\n\n"
        "Sally with green hair\n"
        "Bob with blue hair"
    )
    assert isinstance(result, AIMessage)
    assert len(result.tool_calls) == 1


def test_anthropic_with_empty_text_block() -> None:
    """Anthropic SDK can return an empty text block."""

    @tool
    def type_letter(letter: str) -> str:
        """Type the given letter."""
        return "OK"

    model = ChatAnthropic(model="claude-3-opus-20240229", temperature=0).bind_tools(
        [type_letter]
    )

    messages = [
        SystemMessage(
            content="Repeat the given string using the provided tools. Do not write "
            "anything else or provide any explanations. For example, "
            "if the string is 'abc', you must print the "
            "letters 'a', 'b', and 'c' one at a time and in that order. "
        ),
        HumanMessage(content="dog"),
        AIMessage(
            content=[
                {"text": "", "type": "text"},
                {
                    "id": "toolu_01V6d6W32QGGSmQm4BT98EKk",
                    "input": {"letter": "d"},
                    "name": "type_letter",
                    "type": "tool_use",
                },
            ],
            tool_calls=[
                {
                    "name": "type_letter",
                    "args": {"letter": "d"},
                    "id": "toolu_01V6d6W32QGGSmQm4BT98EKk",
                    "type": "tool_call",
                },
            ],
        ),
        ToolMessage(content="OK", tool_call_id="toolu_01V6d6W32QGGSmQm4BT98EKk"),
    ]

    model.invoke(messages)


def test_with_structured_output() -> None:
    llm = ChatAnthropic(
        model="claude-3-opus-20240229",
    )

    structured_llm = llm.with_structured_output(
        {
            "name": "get_weather",
            "description": "Get weather report for a city",
            "input_schema": {
                "type": "object",
                "properties": {"location": {"type": "string"}},
            },
        }
    )
    response = structured_llm.invoke("what's the weather in san francisco, ca")
    assert isinstance(response, dict)
    assert response["location"]


def test_get_num_tokens_from_messages() -> None:
    llm = ChatAnthropic(model="claude-3-5-sonnet-20241022")

    # Test simple case
    messages = [
        SystemMessage(content="You are a scientist"),
        HumanMessage(content="Hello, Claude"),
    ]
    num_tokens = llm.get_num_tokens_from_messages(messages)
    assert num_tokens > 0

    # Test tool use
    @tool(parse_docstring=True)
    def get_weather(location: str) -> str:
        """Get the current weather in a given location

        Args:
            location: The city and state, e.g. San Francisco, CA
        """
        return "Sunny"

    messages = [
        HumanMessage(content="What's the weather like in San Francisco?"),
    ]
    num_tokens = llm.get_num_tokens_from_messages(messages, tools=[get_weather])
    assert num_tokens > 0

    messages = [
        HumanMessage(content="What's the weather like in San Francisco?"),
        AIMessage(
            content=[
                {"text": "Let's see.", "type": "text"},
                {
                    "id": "toolu_01V6d6W32QGGSmQm4BT98EKk",
                    "input": {"location": "SF"},
                    "name": "get_weather",
                    "type": "tool_use",
                },
            ],
            tool_calls=[
                {
                    "name": "get_weather",
                    "args": {"location": "SF"},
                    "id": "toolu_01V6d6W32QGGSmQm4BT98EKk",
                    "type": "tool_call",
                },
            ],
        ),
        ToolMessage(content="Sunny", tool_call_id="toolu_01V6d6W32QGGSmQm4BT98EKk"),
    ]
    num_tokens = llm.get_num_tokens_from_messages(messages, tools=[get_weather])
    assert num_tokens > 0


class GetWeather(BaseModel):
    """Get the current weather in a given location"""

    location: str = Field(..., description="The city and state, e.g. San Francisco, CA")


@pytest.mark.parametrize("tool_choice", ["GetWeather", "auto", "any"])
def test_anthropic_bind_tools_tool_choice(tool_choice: str) -> None:
    chat_model = ChatAnthropic(
        model=MODEL_NAME,
    )
    chat_model_with_tools = chat_model.bind_tools([GetWeather], tool_choice=tool_choice)
    response = chat_model_with_tools.invoke("what's the weather in ny and la")
    assert isinstance(response, AIMessage)


def test_pdf_document_input() -> None:
    url = "https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf"
    data = b64encode(requests.get(url).content).decode()

    result = ChatAnthropic(model=MODEL_NAME).invoke(
        [
            HumanMessage(
                [
                    "summarize this document",
                    {
                        "type": "document",
                        "source": {
                            "type": "base64",
                            "data": data,
                            "media_type": "application/pdf",
                        },
                    },
                ]
            )
        ]
    )
    assert isinstance(result, AIMessage)
    assert isinstance(result.content, str)
    assert len(result.content) > 0