langflow/src/backend/tests/unit/test_endpoints.py

import asyncio
import json
from uuid import UUID, uuid4

import pytest
from fastapi import status
from httpx import AsyncClient
from langflow.custom.directory_reader.directory_reader import DirectoryReader
from langflow.services.settings.base import BASE_COMPONENTS_PATH


async def run_post(client, flow_id, headers, post_data):
    """Sends a POST request to process a flow and returns the JSON response.

    Args:
        client: The HTTP client to use for making requests.
        flow_id: The identifier of the flow to process.
        headers: The HTTP headers to include in the request.
        post_data: The JSON payload to send in the request.

    Returns:
        The JSON response from the API if the request is successful.

    Raises:
        AssertionError: If the response status code is not 200.
    """
    response = await client.post(
        f"api/v1/process/{flow_id}",
        headers=headers,
        json=post_data,
    )
    assert response.status_code == 200, response.json()
    return response.json()


# Helper function to poll task status
async def poll_task_status(client, headers, href, max_attempts=20, sleep_time=1):
    for _ in range(max_attempts):
        task_status_response = await client.get(
            href,
            headers=headers,
        )
        if task_status_response.status_code == 200 and task_status_response.json()["status"] == "SUCCESS":
            return task_status_response.json()
        await asyncio.sleep(sleep_time)
    return None  # Return None if task did not complete in time


PROMPT_REQUEST = {
    "name": "string",
    "template": "string",
    "frontend_node": {
        "template": {},
        "description": "string",
        "base_classes": ["string"],
        "name": "",
        "display_name": "",
        "documentation": "",
        "custom_fields": {},
        "output_types": [],
        "field_formatters": {
            "formatters": {"openai_api_key": {}},
            "base_formatters": {
                "kwargs": {},
                "optional": {},
                "list": {},
                "dict": {},
                "union": {},
                "multiline": {},
                "show": {},
                "password": {},
                "default": {},
                "headers": {},
                "dict_code_file": {},
                "model_fields": {
                    "MODEL_DICT": {
                        "OpenAI": [
                            "text-davinci-003",
                            "text-davinci-002",
                            "text-curie-001",
                            "text-babbage-001",
                            "text-ada-001",
                        ],
                        "ChatOpenAI": [
                            "gpt-4-turbo-preview",
                            "gpt-4-0125-preview",
                            "gpt-4-1106-preview",
                            "gpt-4-vision-preview",
                            "gpt-3.5-turbo-0125",
                            "gpt-3.5-turbo-1106",
                        ],
                        "Anthropic": [
                            "claude-v1",
                            "claude-v1-100k",
                            "claude-instant-v1",
                            "claude-instant-v1-100k",
                            "claude-v1.3",
                            "claude-v1.3-100k",
                            "claude-v1.2",
                            "claude-v1.0",
                            "claude-instant-v1.1",
                            "claude-instant-v1.1-100k",
                            "claude-instant-v1.0",
                        ],
                        "ChatAnthropic": [
                            "claude-v1",
                            "claude-v1-100k",
                            "claude-instant-v1",
                            "claude-instant-v1-100k",
                            "claude-v1.3",
                            "claude-v1.3-100k",
                            "claude-v1.2",
                            "claude-v1.0",
                            "claude-instant-v1.1",
                            "claude-instant-v1.1-100k",
                            "claude-instant-v1.0",
                        ],
                    }
                },
            },
        },
    },
}


@pytest.mark.benchmark
async def test_get_all(client: AsyncClient, logged_in_headers):
    """Tests the retrieval of all available components from the API.

    Sends a GET request to the `api/v1/all` endpoint and verifies that the returned component names
    correspond to files in the components directory. Also checks for the presence of specific components
    such as "ChatInput", "Prompt", and "ChatOutput" in the response.
    """
    response = await client.get("api/v1/all", headers=logged_in_headers)
    assert response.status_code == 200
    dir_reader = DirectoryReader(BASE_COMPONENTS_PATH)
    files = dir_reader.get_files()
    # json_response is a dict of dicts
    all_names = [component_name for _, components in response.json().items() for component_name in components]
    json_response = response.json()
    # We need to test the custom nodes
    assert len(all_names) <= len(
        files
    )  # Less or equal because we might have some files that don't have the dependencies installed
    assert "ChatInput" in json_response["input_output"]
    assert "Prompt" in json_response["prompts"]
    assert "ChatOutput" in json_response["input_output"]


@pytest.mark.usefixtures("active_user")
async def test_post_validate_code(client: AsyncClient, logged_in_headers):
    # Test case with a valid import and function
    code1 = """
import math

def square(x):
    return x ** 2
"""
    response1 = await client.post("api/v1/validate/code", json={"code": code1}, headers=logged_in_headers)
    assert response1.status_code == 200
    assert response1.json() == {"imports": {"errors": []}, "function": {"errors": []}}

    # Test case with an invalid import and valid function
    code2 = """
import non_existent_module

def square(x):
    return x ** 2
"""
    response2 = await client.post("api/v1/validate/code", json={"code": code2}, headers=logged_in_headers)
    assert response2.status_code == 200
    assert response2.json() == {
        "imports": {"errors": ["No module named 'non_existent_module'"]},
        "function": {"errors": []},
    }

    # Test case with a valid import and invalid function syntax
    code3 = """
import math

def square(x)
    return x ** 2
"""
    response3 = await client.post("api/v1/validate/code", json={"code": code3}, headers=logged_in_headers)
    assert response3.status_code == 200
    assert response3.json() == {
        "imports": {"errors": []},
        "function": {"errors": ["expected ':' (<unknown>, line 4)"]},
    }

    # Test case with invalid JSON payload
    response4 = await client.post("api/v1/validate/code", json={"invalid_key": code1}, headers=logged_in_headers)
    assert response4.status_code == 422

    # Test case with an empty code string
    response5 = await client.post("api/v1/validate/code", json={"code": ""}, headers=logged_in_headers)
    assert response5.status_code == 200
    assert response5.json() == {"imports": {"errors": []}, "function": {"errors": []}}

    # Test case with a syntax error in the code
    code6 = """
import math

def square(x)
    return x ** 2
"""
    response6 = await client.post("api/v1/validate/code", json={"code": code6}, headers=logged_in_headers)
    assert response6.status_code == 200
    assert response6.json() == {
        "imports": {"errors": []},
        "function": {"errors": ["expected ':' (<unknown>, line 4)"]},
    }


VALID_PROMPT = """
I want you to act as a naming consultant for new companies.

Here are some examples of good company names:

- search engine, Google
- social media, Facebook
- video sharing, YouTube

The name should be short, catchy and easy to remember.

What is a good name for a company that makes {product}?
"""

INVALID_PROMPT = "This is an invalid prompt without any input variable."


async def test_valid_prompt(client: AsyncClient):
    PROMPT_REQUEST["template"] = VALID_PROMPT
    response = await client.post("api/v1/validate/prompt", json=PROMPT_REQUEST)
    assert response.status_code == 200
    assert response.json()["input_variables"] == ["product"]


async def test_invalid_prompt(client: AsyncClient):
    PROMPT_REQUEST["template"] = INVALID_PROMPT
    response = await client.post(
        "api/v1/validate/prompt",
        json=PROMPT_REQUEST,
    )
    assert response.status_code == 200
    assert response.json()["input_variables"] == []


@pytest.mark.parametrize(
    ("prompt", "expected_input_variables"),
    [
        ("{color} is my favorite color.", ["color"]),
        ("The weather is {weather} today.", ["weather"]),
        ("This prompt has no variables.", []),
        ("{a}, {b}, and {c} are variables.", ["a", "b", "c"]),
    ],
)
async def test_various_prompts(client, prompt, expected_input_variables):
    PROMPT_REQUEST["template"] = prompt
    response = await client.post("api/v1/validate/prompt", json=PROMPT_REQUEST)
    assert response.status_code == 200
    assert response.json()["input_variables"] == expected_input_variables


async def test_get_vertices_flow_not_found(client, logged_in_headers):
    uuid = uuid4()
    response = await client.post(f"/api/v1/build/{uuid}/vertices", headers=logged_in_headers)
    assert response.status_code == 500


async def test_get_vertices(client, added_flow_webhook_test, logged_in_headers):
    flow_id = added_flow_webhook_test["id"]
    response = await client.post(f"/api/v1/build/{flow_id}/vertices", headers=logged_in_headers)
    assert response.status_code == 200
    assert "ids" in response.json()
    # The response should contain the list in this order
    # ['ConversationBufferMemory-Lu2Nb', 'PromptTemplate-5Q0W8', 'ChatOpenAI-vy7fV', 'LLMChain-UjBh1']
    # The important part is before the - (ConversationBufferMemory, PromptTemplate, ChatOpenAI, LLMChain)
    ids = [_id.split("-")[0] for _id in response.json()["ids"]]

    assert set(ids) == {"ChatInput"}


async def test_build_vertex_invalid_flow_id(client, logged_in_headers):
    uuid = uuid4()
    response = await client.post(f"/api/v1/build/{uuid}/vertices/vertex_id", headers=logged_in_headers)
    assert response.status_code == 500


async def test_build_vertex_invalid_vertex_id(client, added_flow_webhook_test, logged_in_headers):
    flow_id = added_flow_webhook_test["id"]
    response = await client.post(f"/api/v1/build/{flow_id}/vertices/invalid_vertex_id", headers=logged_in_headers)
    assert response.status_code == 500


async def test_successful_run_no_payload(client, simple_api_test, created_api_key):
    headers = {"x-api-key": created_api_key.api_key}
    flow_id = simple_api_test["id"]
    response = await client.post(f"/api/v1/run/{flow_id}", headers=headers)
    assert response.status_code == status.HTTP_200_OK, response.text
    # Add more assertions here to validate the response content
    json_response = response.json()
    assert "session_id" in json_response
    assert "outputs" in json_response
    outer_outputs = json_response["outputs"]
    assert len(outer_outputs) == 1
    outputs_dict = outer_outputs[0]
    assert len(outputs_dict) == 2
    assert "inputs" in outputs_dict
    assert "outputs" in outputs_dict
    assert isinstance(outputs_dict.get("outputs"), list)
    assert len(outputs_dict.get("outputs")) == 1
    ids = [output.get("component_id") for output in outputs_dict.get("outputs")]
    assert all("ChatOutput" in _id for _id in ids)
    display_names = [output.get("component_display_name") for output in outputs_dict.get("outputs")]
    assert all(name in display_names for name in ["Chat Output"])
    output_results_has_results = all("results" in output.get("results") for output in outputs_dict.get("outputs"))
    inner_results = [output.get("results") for output in outputs_dict.get("outputs")]

    assert all(result is not None for result in inner_results), (outputs_dict, output_results_has_results)


async def test_successful_run_with_output_type_text(client, simple_api_test, created_api_key):
    headers = {"x-api-key": created_api_key.api_key}
    flow_id = simple_api_test["id"]
    payload = {
        "output_type": "text",
    }
    response = await client.post(f"/api/v1/run/{flow_id}", headers=headers, json=payload)
    assert response.status_code == status.HTTP_200_OK, response.text
    # Add more assertions here to validate the response content
    json_response = response.json()
    assert "session_id" in json_response
    assert "outputs" in json_response
    outer_outputs = json_response["outputs"]
    assert len(outer_outputs) == 1
    outputs_dict = outer_outputs[0]
    assert len(outputs_dict) == 2
    assert "inputs" in outputs_dict
    assert "outputs" in outputs_dict
    assert isinstance(outputs_dict.get("outputs"), list)
    assert len(outputs_dict.get("outputs")) == 1
    ids = [output.get("component_id") for output in outputs_dict.get("outputs")]
    assert all("ChatOutput" in _id for _id in ids), ids
    display_names = [output.get("component_display_name") for output in outputs_dict.get("outputs")]
    assert all(name in display_names for name in ["Chat Output"]), display_names
    inner_results = [output.get("results") for output in outputs_dict.get("outputs")]
    expected_keys = ["message"]
    assert all(key in result for result in inner_results for key in expected_keys), outputs_dict


@pytest.mark.benchmark
async def test_successful_run_with_output_type_any(client, simple_api_test, created_api_key):
    # This one should have both the ChatOutput and TextOutput components
    headers = {"x-api-key": created_api_key.api_key}
    flow_id = simple_api_test["id"]
    payload = {
        "output_type": "any",
    }
    response = await client.post(f"/api/v1/run/{flow_id}", headers=headers, json=payload)
    assert response.status_code == status.HTTP_200_OK, response.text
    # Add more assertions here to validate the response content
    json_response = response.json()
    assert "session_id" in json_response
    assert "outputs" in json_response
    outer_outputs = json_response["outputs"]
    assert len(outer_outputs) == 1
    outputs_dict = outer_outputs[0]
    assert len(outputs_dict) == 2
    assert "inputs" in outputs_dict
    assert "outputs" in outputs_dict
    assert isinstance(outputs_dict.get("outputs"), list)
    assert len(outputs_dict.get("outputs")) == 1
    ids = [output.get("component_id") for output in outputs_dict.get("outputs")]
    assert all("ChatOutput" in _id or "TextOutput" in _id for _id in ids), ids
    display_names = [output.get("component_display_name") for output in outputs_dict.get("outputs")]
    assert all(name in display_names for name in ["Chat Output"]), display_names
    inner_results = [output.get("results") for output in outputs_dict.get("outputs")]
    expected_keys = ["message"]
    assert all(key in result for result in inner_results for key in expected_keys), outputs_dict


@pytest.mark.benchmark
async def test_successful_run_with_output_type_debug(client, simple_api_test, created_api_key):
    # This one should return outputs for all components
    # Let's just check the amount of outputs(there should be 7)
    headers = {"x-api-key": created_api_key.api_key}
    flow_id = simple_api_test["id"]
    payload = {
        "output_type": "debug",
    }
    response = await client.post(f"/api/v1/run/{flow_id}", headers=headers, json=payload)
    assert response.status_code == status.HTTP_200_OK, response.text
    # Add more assertions here to validate the response content
    json_response = response.json()
    assert "session_id" in json_response
    assert "outputs" in json_response
    outer_outputs = json_response["outputs"]
    assert len(outer_outputs) == 1
    outputs_dict = outer_outputs[0]
    assert len(outputs_dict) == 2
    assert "inputs" in outputs_dict
    assert "outputs" in outputs_dict
    assert isinstance(outputs_dict.get("outputs"), list)
    assert len(outputs_dict.get("outputs")) == 3


@pytest.mark.benchmark
async def test_successful_run_with_input_type_text(client, simple_api_test, created_api_key):
    headers = {"x-api-key": created_api_key.api_key}
    flow_id = simple_api_test["id"]
    payload = {
        "input_type": "text",
        "output_type": "debug",
        "input_value": "value1",
    }
    response = await client.post(f"/api/v1/run/{flow_id}", headers=headers, json=payload)
    assert response.status_code == status.HTTP_200_OK, response.text
    # Add more assertions here to validate the response content
    json_response = response.json()
    assert "session_id" in json_response
    assert "outputs" in json_response
    outer_outputs = json_response["outputs"]
    assert len(outer_outputs) == 1
    outputs_dict = outer_outputs[0]
    assert len(outputs_dict) == 2
    assert "inputs" in outputs_dict
    assert "outputs" in outputs_dict
    assert outputs_dict.get("inputs") == {"input_value": "value1"}
    assert isinstance(outputs_dict.get("outputs"), list)
    assert len(outputs_dict.get("outputs")) == 3
    # Now we get all components that contain TextInput in the component_id
    text_input_outputs = [output for output in outputs_dict.get("outputs") if "TextInput" in output.get("component_id")]
    assert len(text_input_outputs) == 1
    # Now we check if the input_value is correct
    # We get text key twice because the output is now a Message
    assert all(output.get("results").get("text").get("text") == "value1" for output in text_input_outputs), (
        text_input_outputs
    )


@pytest.mark.api_key_required
@pytest.mark.benchmark
async def test_successful_run_with_input_type_chat(client: AsyncClient, simple_api_test, created_api_key):
    headers = {"x-api-key": created_api_key.api_key}
    flow_id = simple_api_test["id"]
    payload = {
        "input_type": "chat",
        "output_type": "debug",
        "input_value": "value1",
    }
    response = await client.post(f"/api/v1/run/{flow_id}", headers=headers, json=payload)
    assert response.status_code == status.HTTP_200_OK, response.text
    # Add more assertions here to validate the response content
    json_response = response.json()
    assert "session_id" in json_response
    assert "outputs" in json_response
    outer_outputs = json_response["outputs"]
    assert len(outer_outputs) == 1
    outputs_dict = outer_outputs[0]
    assert len(outputs_dict) == 2
    assert "inputs" in outputs_dict
    assert "outputs" in outputs_dict
    assert outputs_dict.get("inputs") == {"input_value": "value1"}
    assert isinstance(outputs_dict.get("outputs"), list)
    assert len(outputs_dict.get("outputs")) == 3
    # Now we get all components that contain TextInput in the component_id
    chat_input_outputs = [output for output in outputs_dict.get("outputs") if "ChatInput" in output.get("component_id")]
    assert len(chat_input_outputs) == 1
    # Now we check if the input_value is correct
    assert all(output.get("results").get("message").get("text") == "value1" for output in chat_input_outputs), (
        chat_input_outputs
    )


@pytest.mark.benchmark
async def test_invalid_run_with_input_type_chat(client, simple_api_test, created_api_key):
    headers = {"x-api-key": created_api_key.api_key}
    flow_id = simple_api_test["id"]
    payload = {
        "input_type": "chat",
        "output_type": "debug",
        "input_value": "value1",
        "tweaks": {"Chat Input": {"input_value": "value2"}},
    }
    response = await client.post(f"/api/v1/run/{flow_id}", headers=headers, json=payload)
    assert response.status_code == status.HTTP_400_BAD_REQUEST, response.text
    assert "If you pass an input_value to the chat input, you cannot pass a tweak with the same name." in response.text


@pytest.mark.benchmark
async def test_successful_run_with_input_type_any(client, simple_api_test, created_api_key):
    headers = {"x-api-key": created_api_key.api_key}
    flow_id = simple_api_test["id"]
    payload = {
        "input_type": "any",
        "output_type": "debug",
        "input_value": "value1",
    }
    response = await client.post(f"/api/v1/run/{flow_id}", headers=headers, json=payload)
    assert response.status_code == status.HTTP_200_OK, response.text
    # Add more assertions here to validate the response content
    json_response = response.json()
    assert "session_id" in json_response
    assert "outputs" in json_response
    outer_outputs = json_response["outputs"]
    assert len(outer_outputs) == 1
    outputs_dict = outer_outputs[0]
    assert len(outputs_dict) == 2
    assert "inputs" in outputs_dict
    assert "outputs" in outputs_dict
    assert outputs_dict.get("inputs") == {"input_value": "value1"}
    assert isinstance(outputs_dict.get("outputs"), list)
    assert len(outputs_dict.get("outputs")) == 3
    # Now we get all components that contain TextInput or ChatInput in the component_id
    any_input_outputs = [
        output
        for output in outputs_dict.get("outputs")
        if "TextInput" in output.get("component_id") or "ChatInput" in output.get("component_id")
    ]
    assert len(any_input_outputs) == 2
    # Now we check if the input_value is correct
    all_result_dicts = [output.get("results") for output in any_input_outputs]
    all_message_or_text_dicts = [
        result_dict.get("message", result_dict.get("text")) for result_dict in all_result_dicts
    ]
    assert all(message_or_text_dict.get("text") == "value1" for message_or_text_dict in all_message_or_text_dicts), (
        any_input_outputs
    )


async def test_invalid_flow_id(client, created_api_key):
    headers = {"x-api-key": created_api_key.api_key}
    flow_id = "invalid-flow-id"
    response = await client.post(f"/api/v1/run/{flow_id}", headers=headers)
    assert response.status_code == status.HTTP_404_NOT_FOUND, response.text
    headers = {"x-api-key": created_api_key.api_key}
    flow_id = UUID(int=0)
    response = await client.post(f"/api/v1/run/{flow_id}", headers=headers)
    assert response.status_code == status.HTTP_404_NOT_FOUND, response.text
    # Check if the error detail is as expected


@pytest.mark.benchmark
async def test_starter_projects(client, created_api_key):
    headers = {"x-api-key": created_api_key.api_key}
    response = await client.get("api/v1/starter-projects/", headers=headers)
    assert response.status_code == status.HTTP_200_OK, response.text


async def _run_single_stream_test(client: AsyncClient, flow_id: str, headers: dict, payload: dict):
    """Helper coroutine to run and validate a single streaming request."""
    received_events = []  # Track all event types in sequence
    got_end_event = False
    final_result = None

    async with client.stream("POST", f"/api/v1/run/{flow_id}?stream=true", headers=headers, json=payload) as response:
        assert response.status_code == status.HTTP_200_OK, (
            f"Request failed with status {response.status_code}: {response.text}"
        )
        assert response.headers["content-type"].startswith("text/event-stream"), (
            f"Expected event stream content type, got: {response.headers['content-type']}"
        )

        async for line in response.aiter_lines():
            if not line or line.strip() == "":
                continue

            try:
                event_data = json.loads(line)
            except json.JSONDecodeError:
                pytest.fail(f"Failed to parse JSON from stream line: {line}")

            assert "event" in event_data, f"Event type missing in response line: {line}"
            event_type = event_data["event"]
            received_events.append(event_type)

            if event_type == "add_message":
                message_data = event_data["data"]
                assert "sender_name" in message_data, f"Missing 'sender_name' in add_message event: {message_data}"
                assert "sender" in message_data, f"Missing 'sender' in add_message event: {message_data}"
                assert "session_id" in message_data, f"Missing 'session_id' in add_message event: {message_data}"
                assert "text" in message_data, f"Missing 'text' in add_message event: {message_data}"

            elif event_type == "token":
                token_data = event_data["data"]
                assert "chunk" in token_data, f"Missing 'chunk' in token event: {token_data}"

            elif event_type == "end":
                got_end_event = True
                final_result = event_data["data"].get("result")
                assert final_result is not None, "End event should contain result data but was None"
                break  # Exit loop after end event

            elif event_type == "error":
                pytest.fail(f"Received error event in stream: {event_data['data']}")

    # Assert we got the end event
    assert got_end_event, f"Stream did not receive an end event. Received events: {received_events}"

    # Verify event sequence
    assert "end" in received_events, f"End event missing from event sequence. Received: {received_events}"
    assert received_events[-1] == "end", f"Last event should be 'end', but was '{received_events[-1]}'"

    # Verify we got at least one message or token event before end
    assert len(received_events) > 2, f"Should receive multiple events before the end event. Got: {received_events}"
    assert any(event == "add_message" for event in received_events), (
        f"Should receive at least one add_message event. Received events: {received_events}"
    )
    assert any(event == "token" for event in received_events), (
        f"Should receive at least one token event. Received events: {received_events}"
    )

    # Verify the final result structure in the end event
    assert final_result is not None, "Final result should not be None"
    assert "outputs" in final_result, f"Missing 'outputs' in final result: {final_result}"
    assert "session_id" in final_result, f"Missing 'session_id' in final result: {final_result}"
    outputs = final_result["outputs"]
    assert len(outputs) == 1, f"Expected 1 output, got {len(outputs)}: {outputs}"
    outputs_dict = outputs[0]

    # Verify the debug outputs in final result
    assert "inputs" in outputs_dict, f"Missing 'inputs' in outputs_dict: {outputs_dict}"
    assert "outputs" in outputs_dict, f"Missing 'outputs' in outputs_dict: {outputs_dict}"
    assert outputs_dict["inputs"] == {"input_value": payload["input_value"]}, (
        f"Input value mismatch. Expected: {{'input_value': {payload['input_value']}}}, Got: {outputs_dict['inputs']}"
    )
    assert isinstance(outputs_dict.get("outputs"), list), (
        f"Expected outputs to be a list, got: {type(outputs_dict.get('outputs'))}"
    )

    chat_input_outputs = [output for output in outputs_dict.get("outputs") if "ChatInput" in output.get("component_id")]
    assert len(chat_input_outputs) == 1, (
        f"Expected 1 ChatInput output, got {len(chat_input_outputs)}: {chat_input_outputs}"
    )
    assert all(
        output.get("results").get("message").get("text") == payload["input_value"] for output in chat_input_outputs
    ), f"Message text mismatch. Expected: {payload['input_value']}, Got: {chat_input_outputs}"


@pytest.mark.api_key_required
@pytest.mark.benchmark
async def test_concurrent_stream_run_with_input_type_chat(client: AsyncClient, starter_project, created_api_key):
    """Test concurrent streaming requests to the run endpoint with chat input type."""
    headers = {"x-api-key": created_api_key.api_key, "Accept": "text/event-stream", "Content-Type": "application/json"}
    flow_id = starter_project["id"]
    payload = {
        "input_type": "chat",
        "output_type": "debug",
        "input_value": "How are you?",
    }
    num_concurrent_requests = 5  # Number of concurrent requests to test

    tasks = [_run_single_stream_test(client, flow_id, headers, payload) for _ in range(num_concurrent_requests)]

    # Run all streaming tests concurrently
    await asyncio.gather(*tasks)