litellm/tests/test_litellm/proxy/test_pyroscope.py

"""Unit tests for ProxyStartupEvent._init_pyroscope (Grafana Pyroscope profiling)."""

import os
import sys
from unittest.mock import MagicMock, patch

import pytest

from litellm.proxy.proxy_server import ProxyStartupEvent


def _mock_pyroscope_module():
    """Return a mock module so 'import pyroscope' succeeds in _init_pyroscope."""
    m = MagicMock()
    m.configure = MagicMock()
    return m


def test_init_pyroscope_returns_cleanly_when_disabled():
    """When LITELLM_ENABLE_PYROSCOPE is false, _init_pyroscope returns without error."""
    with patch(
        "litellm.proxy.proxy_server.get_secret_bool",
        return_value=False,
    ):
        ProxyStartupEvent._init_pyroscope()


def test_init_pyroscope_raises_when_enabled_but_missing_app_name():
    """When LITELLM_ENABLE_PYROSCOPE is true but PYROSCOPE_APP_NAME is not set, raises ValueError."""
    mock_pyroscope = _mock_pyroscope_module()
    with patch(
        "litellm.proxy.proxy_server.get_secret_bool",
        return_value=True,
    ), patch.dict(
        sys.modules,
        {"pyroscope": mock_pyroscope},
    ), patch.dict(
        os.environ,
        {
            "PYROSCOPE_APP_NAME": "",
            "PYROSCOPE_SERVER_ADDRESS": "http://localhost:4040",
        },
        clear=False,
    ):
        with pytest.raises(ValueError, match="PYROSCOPE_APP_NAME"):
            ProxyStartupEvent._init_pyroscope()


def test_init_pyroscope_raises_when_enabled_but_missing_server_address():
    """When LITELLM_ENABLE_PYROSCOPE is true but PYROSCOPE_SERVER_ADDRESS is not set, raises ValueError."""
    mock_pyroscope = _mock_pyroscope_module()
    with patch(
        "litellm.proxy.proxy_server.get_secret_bool",
        return_value=True,
    ), patch.dict(
        sys.modules,
        {"pyroscope": mock_pyroscope},
    ), patch.dict(
        os.environ,
        {
            "PYROSCOPE_APP_NAME": "myapp",
            "PYROSCOPE_SERVER_ADDRESS": "",
        },
        clear=False,
    ):
        with pytest.raises(ValueError, match="PYROSCOPE_SERVER_ADDRESS"):
            ProxyStartupEvent._init_pyroscope()


def test_init_pyroscope_raises_when_sample_rate_invalid():
    """When PYROSCOPE_SAMPLE_RATE is not a number, raises ValueError."""
    mock_pyroscope = _mock_pyroscope_module()
    with patch(
        "litellm.proxy.proxy_server.get_secret_bool",
        return_value=True,
    ), patch.dict(
        sys.modules,
        {"pyroscope": mock_pyroscope},
    ), patch.dict(
        os.environ,
        {
            "PYROSCOPE_APP_NAME": "myapp",
            "PYROSCOPE_SERVER_ADDRESS": "http://localhost:4040",
            "PYROSCOPE_SAMPLE_RATE": "not-a-number",
        },
        clear=False,
    ):
        with pytest.raises(ValueError, match="PYROSCOPE_SAMPLE_RATE"):
            ProxyStartupEvent._init_pyroscope()


def test_init_pyroscope_accepts_integer_sample_rate():
    """When enabled with valid config and integer sample rate, configures pyroscope."""
    mock_pyroscope = _mock_pyroscope_module()
    with patch(
        "litellm.proxy.proxy_server.get_secret_bool",
        return_value=True,
    ), patch.dict(
        sys.modules,
        {"pyroscope": mock_pyroscope},
    ), patch.dict(
        os.environ,
        {
            "PYROSCOPE_APP_NAME": "myapp",
            "PYROSCOPE_SERVER_ADDRESS": "http://localhost:4040",
            "PYROSCOPE_SAMPLE_RATE": "100",
        },
        clear=False,
    ):
        ProxyStartupEvent._init_pyroscope()
    mock_pyroscope.configure.assert_called_once()
    call_kw = mock_pyroscope.configure.call_args[1]
    assert call_kw["app_name"] == "myapp"
    assert call_kw["server_address"] == "http://localhost:4040"
    assert call_kw["sample_rate"] == 100


def test_init_pyroscope_accepts_float_sample_rate_parsed_as_int():
    """PYROSCOPE_SAMPLE_RATE can be a float string; it is parsed as integer."""
    mock_pyroscope = _mock_pyroscope_module()
    with patch(
        "litellm.proxy.proxy_server.get_secret_bool",
        return_value=True,
    ), patch.dict(
        sys.modules,
        {"pyroscope": mock_pyroscope},
    ), patch.dict(
        os.environ,
        {
            "PYROSCOPE_APP_NAME": "myapp",
            "PYROSCOPE_SERVER_ADDRESS": "http://localhost:4040",
            "PYROSCOPE_SAMPLE_RATE": "100.7",
        },
        clear=False,
    ):
        ProxyStartupEvent._init_pyroscope()
    call_kw = mock_pyroscope.configure.call_args[1]
    assert call_kw["sample_rate"] == 100