TestAsyncMessages Class — anthropic-sdk-python Architecture

Architecture documentation for the TestAsyncMessages class in test_beta_messages.py from the anthropic-sdk-python codebase.

Class python AnthropicClient

Entity Profile

AnthropicClient→ TestAsyncMessages Class — anthropic-sdk-python Architecture

Dependency Diagram

graph TD
  692db1db_e9a7_ed62_b129_14081098a7ae["TestAsyncMessages"]
  17ce5647_6f06_0676_a4a5_e378a3f57cb1["BaseModel"]
  692db1db_e9a7_ed62_b129_14081098a7ae -->|extends| 17ce5647_6f06_0676_a4a5_e378a3f57cb1
  145ee5ba_422d_688e_ca30_dbf4a26bf47f["AnthropicError"]
  692db1db_e9a7_ed62_b129_14081098a7ae -->|extends| 145ee5ba_422d_688e_ca30_dbf4a26bf47f
  61bcf220_f0ab_e6e0_1d11_6d45d9dbf60b["test_beta_messages.py"]
  692db1db_e9a7_ed62_b129_14081098a7ae -->|defined in| 61bcf220_f0ab_e6e0_1d11_6d45d9dbf60b
  dd54031b_584a_4852_c5cc_c514cb424766["test_stream_with_raw_schema()"]
  692db1db_e9a7_ed62_b129_14081098a7ae -->|method| dd54031b_584a_4852_c5cc_c514cb424766
  55e28727_496a_adff_d21a_2d67318f4082["test_parse_uses_output_config()"]
  692db1db_e9a7_ed62_b129_14081098a7ae -->|method| 55e28727_496a_adff_d21a_2d67318f4082
  74e22072_e66b_fa27_b5a9_eeef81fb4f31["test_rejects_both_output_format_and_config()"]
  692db1db_e9a7_ed62_b129_14081098a7ae -->|method| 74e22072_e66b_fa27_b5a9_eeef81fb4f31

Relationship Graph

Source Code

tests/lib/_parse/test_beta_messages.py lines 17–131

class TestAsyncMessages:
    async def test_stream_with_raw_schema(self, async_client: AsyncAnthropic, respx_mock: MockRouter) -> None:
        async def async_stream_parse(client: AsyncAnthropic) -> ParsedBetaMessage[None]:
            async with client.beta.messages.stream(
                model="claude-sonnet-4-5",
                messages=[
                    {
                        "role": "user",
                        "content": "Extract order IDs from the following text:\n\nOrder 12345\nOrder 67890",
                    }
                ],
                output_format={
                    "type": "json_schema",
                    "schema": {
                        "type": "array",
                        "items": {"type": "integer"},
                    },
                },
                betas=["structured-outputs-2025-12-15"],
                max_tokens=1024,
            ) as stream:
                return await stream.get_final_message()

        response = await make_async_stream_snapshot_request(
            async_stream_parse,
            content_snapshot=external("uuid:48aac7c3-f271-47b3-854b-af4ed31e10bb.json"),
            respx_mock=respx_mock,
            mock_client=async_client,
            path="/v1/messages?beta=true",
        )

        assert response.content[0].text == snapshot("[12345,67890]")

    async def test_parse_uses_output_config(self, async_client: AsyncAnthropic, respx_mock: MockRouter) -> None:
        class User(BaseModel):
            name: str
            age: int

        async def simple_parse(client: AsyncAnthropic) -> LegacyAPIResponse[ParsedBetaMessage[User]]:
            return await client.beta.with_raw_response.messages.parse(
                model="claude-sonnet-4-5",
                messages=[
                    {
                        "role": "user",
                        "content": "Extract the user's name and age from the following text:\n\nMy name is John Doe and I am 30 years old.",
                    }
                ],
                output_format=User,
                max_tokens=1024,
            )

        response = await make_async_stream_snapshot_request(
            simple_parse,
            content_snapshot=external("uuid:044ce19d-3e9c-42d2-90e7-759c978cd94b.json"),
            respx_mock=respx_mock,
            mock_client=async_client,
            path="/v1/messages?beta=true",
        )

        request_json = json.loads(response.http_request.content)
        assert request_json == snapshot(
            {
                "max_tokens": 1024,
                "messages": [
                    {
                        "role": "user",
                        "content": """\
Extract the user's name and age from the following text:

My name is John Doe and I am 30 years old.\
""",
                    }
                ],
                "model": "claude-sonnet-4-5",
                "output_config": {
                    "format": {
                        "schema": {
                            "type": "object",
                            "title": "User",
                            "properties": {
                                "name": {"type": "string", "title": "Name"},