litellm/tests/test_litellm/test_redis.py

import json
from types import SimpleNamespace
from unittest.mock import MagicMock, patch

import pytest
import redis
import redis.asyncio as async_redis

from litellm._redis import (
    _get_redis_cluster_kwargs,
    get_redis_async_client,
    get_redis_client,
    get_redis_connection_pool,
    get_redis_url_from_environment,
)
from litellm.constants import REDIS_CLUSTER_HEALTH_CHECK_INTERVAL
from litellm._redis_credential_provider import (
    AzureADCredentialProvider,
    GCPIAMCredentialProvider,
    _token_cache,
)


@pytest.fixture(autouse=True)
def clear_gcp_iam_token_cache():
    """Reset the module-level GCP IAM token cache between tests."""
    _token_cache.clear()
    yield
    _token_cache.clear()


def test_get_redis_url_from_environment_single_url(monkeypatch):
    """Test when REDIS_URL is directly provided"""
    # Set the environment variable
    monkeypatch.setenv("REDIS_URL", "redis://redis-server:6379/0")

    # Call the function to get the Redis URL
    redis_url = get_redis_url_from_environment()

    # Assert that the returned URL matches the expected value
    assert redis_url == "redis://redis-server:6379/0"


def test_get_redis_url_from_environment_host_port(monkeypatch):
    """Test when REDIS_HOST and REDIS_PORT are provided"""
    # Set the environment variables
    monkeypatch.setenv("REDIS_HOST", "redis-server")
    monkeypatch.setenv("REDIS_PORT", "6379")
    # Ensure authentication variables are not set
    monkeypatch.delenv("REDIS_USERNAME", raising=False)
    monkeypatch.delenv("REDIS_PASSWORD", raising=False)
    monkeypatch.delenv("REDIS_SSL", raising=False)

    # Call the function to get the Redis URL
    redis_url = get_redis_url_from_environment()

    # Assert that the returned URL matches the expected value
    assert redis_url == "redis://redis-server:6379"


def test_get_redis_url_from_environment_with_ssl(monkeypatch):
    """Test when SSL is enabled"""
    # Set the environment variables
    monkeypatch.setenv("REDIS_HOST", "redis-server")
    monkeypatch.setenv("REDIS_PORT", "6379")
    monkeypatch.setenv("REDIS_SSL", "true")
    # Ensure authentication variables are not set
    monkeypatch.delenv("REDIS_USERNAME", raising=False)
    monkeypatch.delenv("REDIS_PASSWORD", raising=False)

    # Call the function to get the Redis URL
    redis_url = get_redis_url_from_environment()

    # Assert that the returned URL uses rediss:// protocol
    assert redis_url == "rediss://redis-server:6379"


def test_get_redis_url_from_environment_with_username_password(monkeypatch):
    """Test when username and password are provided"""
    # Set the environment variables
    monkeypatch.setenv("REDIS_HOST", "redis-server")
    monkeypatch.setenv("REDIS_PORT", "6379")
    monkeypatch.setenv("REDIS_USERNAME", "user")
    monkeypatch.setenv("REDIS_PASSWORD", "password")

    # Call the function to get the Redis URL
    redis_url = get_redis_url_from_environment()

    # Assert that the returned URL includes username:password@
    assert redis_url == "redis://user:password@redis-server:6379"


def test_get_redis_url_from_environment_with_password_only(monkeypatch):
    """Test when only password is provided"""
    # Set the environment variables
    monkeypatch.setenv("REDIS_HOST", "redis-server")
    monkeypatch.setenv("REDIS_PORT", "6379")
    monkeypatch.setenv("REDIS_PASSWORD", "password")
    # Ensure username is not set
    monkeypatch.delenv("REDIS_USERNAME", raising=False)
    monkeypatch.delenv("REDIS_SSL", raising=False)

    # Call the function to get the Redis URL
    redis_url = get_redis_url_from_environment()

    # Assert that the returned URL includes :password@
    assert redis_url == "redis://password@redis-server:6379"


def test_get_redis_url_from_environment_with_all_options(monkeypatch):
    """Test when all options are provided"""
    # Set the environment variables
    monkeypatch.setenv("REDIS_HOST", "redis-server")
    monkeypatch.setenv("REDIS_PORT", "6379")
    monkeypatch.setenv("REDIS_USERNAME", "user")
    monkeypatch.setenv("REDIS_PASSWORD", "password")
    monkeypatch.setenv("REDIS_SSL", "true")

    # Call the function to get the Redis URL
    redis_url = get_redis_url_from_environment()

    # Assert that the returned URL includes all components
    assert redis_url == "rediss://user:password@redis-server:6379"


def test_get_redis_url_from_environment_missing_host_port(monkeypatch):
    """Test error when required variables are missing"""
    # Make sure these environment variables don't exist
    monkeypatch.delenv("REDIS_URL", raising=False)
    monkeypatch.delenv("REDIS_HOST", raising=False)
    monkeypatch.delenv("REDIS_PORT", raising=False)

    # Call the function and expect a ValueError
    with pytest.raises(ValueError) as excinfo:
        get_redis_url_from_environment()

    # Check the error message
    assert (
        "Either 'REDIS_URL' or both 'REDIS_HOST' and 'REDIS_PORT' must be specified"
        in str(excinfo.value)
    )


def test_get_redis_url_from_environment_missing_port(monkeypatch):
    """Test error when only REDIS_HOST is provided but REDIS_PORT is missing"""
    # Make sure REDIS_URL doesn't exist and set only REDIS_HOST
    monkeypatch.delenv("REDIS_URL", raising=False)
    monkeypatch.delenv("REDIS_PORT", raising=False)
    monkeypatch.setenv("REDIS_HOST", "redis-server")

    # Call the function and expect a ValueError
    with pytest.raises(ValueError) as excinfo:
        get_redis_url_from_environment()

    # Check the error message
    assert (
        "Either 'REDIS_URL' or both 'REDIS_HOST' and 'REDIS_PORT' must be specified"
        in str(excinfo.value)
    )


def test_max_connections_in_cluster_kwargs():
    """Test that max_connections is included in Redis cluster kwargs"""
    kwargs = _get_redis_cluster_kwargs()
    assert (
        "max_connections" in kwargs
    ), "max_connections should be in available Redis cluster kwargs"


def test_socket_timeouts_in_cluster_kwargs():
    """Test that Redis cluster clients can receive socket timeout configuration"""
    kwargs = _get_redis_cluster_kwargs()
    assert "socket_timeout" in kwargs
    assert "socket_connect_timeout" in kwargs


def test_reconnect_kwargs_in_cluster_kwargs():
    """Health check and keepalive must survive the cluster kwarg allow-list so
    operators can tune Redis cluster reconnection behavior via config."""
    kwargs = _get_redis_cluster_kwargs()
    assert "health_check_interval" in kwargs
    assert "socket_keepalive" in kwargs


@patch("litellm._redis.async_redis.RedisCluster")
def test_async_cluster_sets_reconnect_defaults(mock_cluster_cls):
    """
    The async RedisCluster client must be built with a periodic health check and
    TCP keepalive so a connection silently dropped by a cluster restart (e.g.
    ElastiCache Serverless maintenance) is revalidated and reconnected before
    reuse instead of stalling in re-initialization. Regression for LIT-4083.
    """
    get_redis_async_client(startup_nodes=[{"host": "cluster-node", "port": 6379}])

    mock_cluster_cls.assert_called_once()
    call_kwargs = mock_cluster_cls.call_args[1]
    assert call_kwargs["health_check_interval"] == REDIS_CLUSTER_HEALTH_CHECK_INTERVAL
    assert call_kwargs["health_check_interval"] > 0
    assert call_kwargs["socket_keepalive"] is True


@patch("litellm._redis.async_redis.RedisCluster")
def test_async_cluster_reconnect_defaults_are_overridable(mock_cluster_cls):
    """An explicit health_check_interval / socket_keepalive from config must win
    over the built-in reconnect defaults."""
    get_redis_async_client(
        startup_nodes=[{"host": "cluster-node", "port": 6379}],
        health_check_interval=7,
        socket_keepalive=False,
    )

    call_kwargs = mock_cluster_cls.call_args[1]
    assert call_kwargs["health_check_interval"] == 7
    assert call_kwargs["socket_keepalive"] is False


def test_get_redis_async_client_with_connection_pool():
    """Test that connection_pool parameter is properly passed to Redis client"""
    # Create a mock connection pool
    mock_pool = MagicMock(spec=async_redis.BlockingConnectionPool)

    # Mock the Redis client creation
    with (
        patch("litellm._redis.async_redis.Redis") as mock_redis,
        patch("litellm._redis._get_redis_client_logic") as mock_logic,
    ):

        # Configure mock to return basic redis kwargs
        mock_logic.return_value = {"host": "localhost", "port": 6379, "db": 0}

        # Call get_redis_async_client with connection_pool
        get_redis_async_client(connection_pool=mock_pool)

        # Verify Redis was called with connection_pool in kwargs
        call_kwargs = mock_redis.call_args[1]
        assert (
            "connection_pool" in call_kwargs
        ), "connection_pool should be passed to Redis client"
        assert (
            call_kwargs["connection_pool"] == mock_pool
        ), "connection_pool should match the provided pool"


def test_get_redis_async_client_without_connection_pool():
    """Test that Redis client works without connection_pool parameter"""
    with (
        patch("litellm._redis.async_redis.Redis") as mock_redis,
        patch("litellm._redis._get_redis_client_logic") as mock_logic,
    ):

        # Configure mock to return basic redis kwargs
        mock_logic.return_value = {"host": "localhost", "port": 6379, "db": 0}

        # Call get_redis_async_client without connection_pool
        get_redis_async_client()

        # Verify Redis was called without connection_pool in kwargs
        call_kwargs = mock_redis.call_args[1]
        assert (
            "connection_pool" not in call_kwargs
        ), "connection_pool should not be in kwargs when not provided"


def test_gcp_iam_credential_provider_get_credentials():
    """GCPIAMCredentialProvider.get_credentials() returns a token tuple."""
    service_account = "projects/-/serviceAccounts/test@project.iam.gserviceaccount.com"

    with patch(
        "litellm._redis_credential_provider._generate_gcp_iam_access_token",
        return_value="tok-1",
    ) as mock_gen:
        provider = GCPIAMCredentialProvider(service_account)
        creds = provider.get_credentials()

    assert creds == ("tok-1",)
    mock_gen.assert_called_once_with(service_account)


def test_gcp_iam_credential_provider_caches_token():
    """
    Repeated calls to get_credentials() reuse the cached token and only call
    _generate_gcp_iam_access_token once, avoiding redundant blocking I/O.
    """
    service_account = "projects/-/serviceAccounts/test@project.iam.gserviceaccount.com"

    with patch(
        "litellm._redis_credential_provider._generate_gcp_iam_access_token",
        return_value="tok-cached",
    ) as mock_gen:
        provider = GCPIAMCredentialProvider(service_account)
        results = [provider.get_credentials() for _ in range(5)]

    assert all(r == ("tok-cached",) for r in results)
    # Token must be fetched exactly once regardless of how many connections are established
    mock_gen.assert_called_once_with(service_account)


def test_gcp_iam_credential_provider_refreshes_on_expiry():
    """
    get_credentials() fetches a new token after the cached one expires,
    ensuring connections always authenticate with a valid token.
    """
    import time

    import litellm._redis_credential_provider as cred_module

    service_account = "projects/-/serviceAccounts/test@project.iam.gserviceaccount.com"

    with patch(
        "litellm._redis_credential_provider._generate_gcp_iam_access_token",
        side_effect=["tok-1", "tok-2"],
    ) as mock_gen:
        provider = GCPIAMCredentialProvider(service_account)

        # First call — populates cache
        assert provider.get_credentials() == ("tok-1",)

        # Artificially expire the cached token
        cred_module._token_cache[service_account] = ("tok-1", time.monotonic() - 1)

        # Second call — cache miss, must refresh
        assert provider.get_credentials() == ("tok-2",)

    assert mock_gen.call_count == 2


def test_gcp_iam_credential_provider_cache_shared_across_instances():
    """
    Multiple GCPIAMCredentialProvider instances for the same service account
    share one cached token so concurrent Redis connections don't each trigger
    a blocking IAM round-trip.
    """
    service_account = (
        "projects/-/serviceAccounts/shared@project.iam.gserviceaccount.com"
    )

    with patch(
        "litellm._redis_credential_provider._generate_gcp_iam_access_token",
        return_value="tok-shared",
    ) as mock_gen:
        p1 = GCPIAMCredentialProvider(service_account)
        p2 = GCPIAMCredentialProvider(service_account)

        assert p1.get_credentials() == ("tok-shared",)
        assert p2.get_credentials() == ("tok-shared",)

    # Only one network call despite two provider instances
    mock_gen.assert_called_once()


def test_get_redis_async_client_gcp_cluster_uses_credential_provider():
    """
    When startup_nodes + gcp_service_account are provided, the async cluster client
    must be constructed with a GCPIAMCredentialProvider — not a static password.
    This ensures that the 1-hour IAM token expiry does not cause auth failures.
    """
    startup_nodes = [{"host": "redis-node-1", "port": 6379}]

    mock_connect_func = MagicMock()
    mock_connect_func._gcp_service_account = (
        "projects/-/serviceAccounts/sa@project.iam.gserviceaccount.com"
    )

    redis_kwargs = {
        "startup_nodes": startup_nodes,
        "redis_connect_func": mock_connect_func,
    }

    with (
        patch("litellm._redis.async_redis.RedisCluster") as mock_cluster,
        patch("litellm._redis._get_redis_client_logic", return_value=redis_kwargs),
    ):
        get_redis_async_client()

    assert mock_cluster.called
    cluster_call_kwargs = mock_cluster.call_args[1]

    # Must use credential_provider, not a static password
    assert (
        "credential_provider" in cluster_call_kwargs
    ), "async GCP cluster must use credential_provider for per-connection token refresh"
    assert isinstance(
        cluster_call_kwargs["credential_provider"], GCPIAMCredentialProvider
    )
    assert (
        "password" not in cluster_call_kwargs
    ), "async GCP cluster must not use a static password (expires after 1h)"


@patch("litellm._redis.init_redis_cluster")
def test_sync_client_prefers_cluster_over_url(mock_init_cluster, monkeypatch):
    """
    Test get_redis_client returns RedisCluster when startup_nodes is present even if
    REDIS_URL is also set.
    """
    monkeypatch.setenv("REDIS_URL", "redis://fallback-host:6379")
    mock_init_cluster.return_value = MagicMock(spec=redis.RedisCluster)

    startup_nodes = [{"host": "cluster-node.example.com", "port": 6379}]
    get_redis_client(startup_nodes=startup_nodes)

    mock_init_cluster.assert_called_once()
    call_kwargs = mock_init_cluster.call_args[0][0]
    assert (
        "startup_nodes" in call_kwargs
    ), "startup_nodes must be forwarded to init_redis_cluster"


@patch("litellm._redis.async_redis.RedisCluster")
def test_async_client_prefers_cluster_over_url(mock_cluster_cls, monkeypatch):
    """
    Test (1) get_redis_async_client returns async RedisCluster when startup_nodes is present
    even if REDIS_URL is also set and (2) startup_nodes is forwarded to RedisCluster.
    """
    monkeypatch.setenv("REDIS_URL", "redis://fallback-host:6379")

    startup_nodes = [{"host": "cluster-node.example.com", "port": 6379}]
    get_redis_async_client(startup_nodes=startup_nodes)

    mock_cluster_cls.assert_called_once()
    call_kwargs = mock_cluster_cls.call_args[1]
    assert (
        "startup_nodes" in call_kwargs
    ), "startup_nodes must be forwarded to async RedisCluster"
    assert (
        len(call_kwargs["startup_nodes"]) == 1
    ), "should forward exactly 1 cluster node"


@patch("litellm._redis.async_redis.RedisCluster")
def test_async_client_prefers_cluster_over_url_via_env_var(
    mock_cluster_cls, monkeypatch
):
    """
    Test get_redis_async_client returns async RedisCluster when REDIS_CLUSTER_NODES is set
    even if REDIS_URL is also set.
    """
    monkeypatch.setenv("REDIS_URL", "redis://fallback-host:6379")
    monkeypatch.setenv(
        "REDIS_CLUSTER_NODES",
        json.dumps([{"host": "cluster-node.example.com", "port": 6379}]),
    )

    get_redis_async_client()

    mock_cluster_cls.assert_called_once()
    call_kwargs = mock_cluster_cls.call_args[1]
    assert (
        "startup_nodes" in call_kwargs
    ), "startup_nodes must be forwarded to async RedisCluster"


@patch("litellm._redis.init_redis_cluster")
def test_sync_client_prefers_cluster_over_url_via_env_var(
    mock_init_cluster, monkeypatch
):
    """
    Test get_redis_client returns RedisCluster when REDIS_CLUSTER_NODES is set even if
    REDIS_URL is also set.
    """
    monkeypatch.setenv("REDIS_URL", "redis://fallback-host:6379")
    monkeypatch.setenv(
        "REDIS_CLUSTER_NODES",
        json.dumps([{"host": "cluster-node.example.com", "port": 6379}]),
    )
    mock_init_cluster.return_value = MagicMock(spec=redis.RedisCluster)

    get_redis_client()

    mock_init_cluster.assert_called_once()
    call_kwargs = mock_init_cluster.call_args[0][0]
    assert (
        "startup_nodes" in call_kwargs
    ), "startup_nodes must be forwarded to init_redis_cluster"
    assert len(call_kwargs["startup_nodes"]) == 1


@patch("litellm._redis.redis.Sentinel")
def test_sync_sentinel_uses_sentinel_password_and_master_password(mock_sentinel_cls):
    """Sentinel auth must be passed to the sentinel, not the Redis master client."""
    mock_sentinel = MagicMock()
    mock_sentinel_cls.return_value = mock_sentinel

    get_redis_client(
        sentinel_nodes=[("sentinel-1", 26379)],
        sentinel_password="sentinel-secret",
        service_name="mymaster",
        password="redis-secret",
        username="redis-user",
        ssl=True,
        ssl_cert_reqs="required",
        ssl_check_hostname=True,
        ssl_ca_certs="/tmp/test-ca.pem",
        max_connections=17,
        socket_timeout=5,
    )

    mock_sentinel_cls.assert_called_once()
    sentinel_call_kwargs = mock_sentinel_cls.call_args[1]
    assert "password" not in sentinel_call_kwargs
    assert "username" not in sentinel_call_kwargs
    assert "ssl" not in sentinel_call_kwargs
    assert "ssl_cert_reqs" not in sentinel_call_kwargs
    assert "ssl_check_hostname" not in sentinel_call_kwargs
    assert "ssl_ca_certs" not in sentinel_call_kwargs
    assert "max_connections" not in sentinel_call_kwargs
    assert "socket_timeout" not in sentinel_call_kwargs
    assert sentinel_call_kwargs["sentinel_kwargs"] == {
        "password": "sentinel-secret",
        "username": "redis-user",
        "ssl": True,
        "ssl_cert_reqs": "required",
        "ssl_check_hostname": True,
        "ssl_ca_certs": "/tmp/test-ca.pem",
        "max_connections": 17,
        "socket_timeout": 5,
    }
    assert "service_name" not in sentinel_call_kwargs["sentinel_kwargs"]
    assert "sentinel_nodes" not in sentinel_call_kwargs["sentinel_kwargs"]
    assert "sentinel_password" not in sentinel_call_kwargs["sentinel_kwargs"]
    mock_sentinel.master_for.assert_called_once_with(
        "mymaster",
        password="redis-secret",
        username="redis-user",
        ssl=True,
        ssl_cert_reqs="required",
        ssl_check_hostname=True,
        ssl_ca_certs="/tmp/test-ca.pem",
        max_connections=17,
        socket_timeout=5,
    )


@patch("litellm._redis.async_redis.Sentinel")
def test_async_sentinel_uses_sentinel_password_and_master_password(
    mock_sentinel_cls,
):
    """Async sentinel auth must mirror the sync sentinel password routing."""
    mock_sentinel = MagicMock()
    mock_sentinel_cls.return_value = mock_sentinel

    get_redis_async_client(
        sentinel_nodes=[("sentinel-1", 26379)],
        sentinel_password="sentinel-secret",
        service_name="mymaster",
        password="redis-secret",
        username="redis-user",
        ssl=True,
        ssl_cert_reqs="required",
        ssl_check_hostname=True,
        ssl_ca_certs="/tmp/test-ca.pem",
        max_connections=17,
        socket_timeout=5,
    )

    mock_sentinel_cls.assert_called_once()
    sentinel_call_kwargs = mock_sentinel_cls.call_args[1]
    assert "password" not in sentinel_call_kwargs
    assert "username" not in sentinel_call_kwargs
    assert "ssl" not in sentinel_call_kwargs
    assert "ssl_cert_reqs" not in sentinel_call_kwargs
    assert "ssl_check_hostname" not in sentinel_call_kwargs
    assert "ssl_ca_certs" not in sentinel_call_kwargs
    assert "max_connections" not in sentinel_call_kwargs
    assert "socket_timeout" not in sentinel_call_kwargs
    assert sentinel_call_kwargs["sentinel_kwargs"] == {
        "password": "sentinel-secret",
        "username": "redis-user",
        "ssl": True,
        "ssl_cert_reqs": "required",
        "ssl_check_hostname": True,
        "ssl_ca_certs": "/tmp/test-ca.pem",
        "max_connections": 17,
        "socket_timeout": 5,
    }
    assert "service_name" not in sentinel_call_kwargs["sentinel_kwargs"]
    assert "sentinel_nodes" not in sentinel_call_kwargs["sentinel_kwargs"]
    assert "sentinel_password" not in sentinel_call_kwargs["sentinel_kwargs"]
    mock_sentinel.master_for.assert_called_once_with(
        "mymaster",
        password="redis-secret",
        username="redis-user",
        ssl=True,
        ssl_cert_reqs="required",
        ssl_check_hostname=True,
        ssl_ca_certs="/tmp/test-ca.pem",
        max_connections=17,
        socket_timeout=5,
    )


@patch("litellm._redis.init_redis_cluster")
def test_sync_client_preserves_password_for_cluster_when_url_also_set(
    mock_init_cluster, monkeypatch
):
    """
    Test _get_redis_client_logic does not strip password from redis_kwargs when
    startup_nodes is present even if REDIS_URL is also set.
    """
    monkeypatch.setenv("REDIS_URL", "redis://fallback-host:6379")
    monkeypatch.setenv("REDIS_PASSWORD", "secret")
    mock_init_cluster.return_value = MagicMock(spec=redis.RedisCluster)

    startup_nodes = [{"host": "cluster-node.example.com", "port": 6379}]
    get_redis_client(startup_nodes=startup_nodes)

    mock_init_cluster.assert_called_once()
    call_kwargs = mock_init_cluster.call_args[0][0]
    assert (
        "password" in call_kwargs
    ), "password must not be stripped when routing to cluster"
    assert call_kwargs["password"] == "secret"


def test_connection_pool_returns_none_for_cluster(monkeypatch):
    """Test get_redis_connection_pool returns None when startup_nodes is present."""
    monkeypatch.setenv("REDIS_URL", "redis://fallback-host:6379")
    startup_nodes = [{"host": "cluster-node.example.com", "port": 6379}]
    result = get_redis_connection_pool(startup_nodes=startup_nodes)
    assert result is None, "connection pool must be None for cluster mode"


@patch("litellm._redis.redis.Redis.from_url")
def test_sync_client_url_used_when_no_cluster(mock_from_url, monkeypatch):
    """
    Test get_redis_client default to using URL path when no startup_nodes are provided.
    """
    monkeypatch.setenv("REDIS_URL", "redis://plain-host:6379")
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    get_redis_client()

    mock_from_url.assert_called_once()


@patch("litellm._redis.redis.Redis.from_url")
def test_explicit_host_outranks_environment_redis_url(mock_from_url, monkeypatch):
    """
    An explicitly configured host must win over REDIS_URL in the environment.

    Otherwise the url branch strips the caller's host/port and the client
    silently connects to whatever REDIS_URL names, so an explicit config block
    (or a connection test typed into the admin UI) targets the wrong server.
    """
    monkeypatch.setenv("REDIS_URL", "redis://env-host:6379")
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    client = get_redis_client(host="explicit-host", port=6380)

    mock_from_url.assert_not_called()
    assert client.connection_pool.connection_kwargs["host"] == "explicit-host"
    assert client.connection_pool.connection_kwargs["port"] == 6380


@patch("litellm._redis.redis.Redis.from_url")
def test_explicit_url_still_wins_over_environment_host(mock_from_url, monkeypatch):
    """An explicit url argument keeps taking the from_url path."""
    monkeypatch.setenv("REDIS_HOST", "env-host")
    monkeypatch.setenv("REDIS_PORT", "6379")
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    get_redis_client(url="redis://explicit-host:6380")

    mock_from_url.assert_called_once()
    assert mock_from_url.call_args.kwargs["url"] == "redis://explicit-host:6380"


@patch("litellm._redis.redis.Redis.from_url")
def test_environment_redis_url_used_when_caller_names_no_target(mock_from_url, monkeypatch):
    """With no caller-supplied connection target, REDIS_URL still drives the client."""
    monkeypatch.setenv("REDIS_URL", "redis://env-host:6379")
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    get_redis_client()

    mock_from_url.assert_called_once()


@pytest.mark.parametrize("falsy_ssl", [False, None, 0, ""])
def test_connection_pool_falsy_ssl_uses_plain_connection(falsy_ssl, monkeypatch):
    """
    ssl=False must produce a plain (non-TLS) connection pool.

    The admin UI's coordination Redis form always sends ssl explicitly, so a
    presence check here turns ssl=False into an SSLConnection; the TLS
    handshake against a plaintext Redis then hangs until the ping timeout and
    every connection test from the UI fails.
    """
    monkeypatch.delenv("REDIS_URL", raising=False)
    monkeypatch.delenv("REDIS_SSL", raising=False)
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    with patch("litellm._redis.async_redis.BlockingConnectionPool") as mock_pool:
        get_redis_connection_pool(host="plain-redis.example.com", port=6379, ssl=falsy_ssl)

    call_kwargs = mock_pool.call_args.kwargs
    assert call_kwargs.get("connection_class") is not async_redis.SSLConnection, (
        f"ssl={falsy_ssl!r} must not select SSLConnection"
    )
    assert "ssl" not in call_kwargs, "ssl must never leak into BlockingConnectionPool kwargs"


def test_connection_pool_ssl_true_uses_ssl_connection(monkeypatch):
    """ssl=True must still opt in to a TLS connection pool."""
    monkeypatch.delenv("REDIS_URL", raising=False)
    monkeypatch.delenv("REDIS_SSL", raising=False)
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    with patch("litellm._redis.async_redis.BlockingConnectionPool") as mock_pool:
        get_redis_connection_pool(host="tls-redis.example.com", port=6380, ssl=True)

    call_kwargs = mock_pool.call_args.kwargs
    assert call_kwargs.get("connection_class") is async_redis.SSLConnection
    assert "ssl" not in call_kwargs, "ssl must be consumed, not forwarded to the pool"


def test_connection_pool_without_ssl_kwarg_uses_plain_connection(monkeypatch):
    """Omitting ssl entirely must keep the historical plain-connection default."""
    monkeypatch.delenv("REDIS_URL", raising=False)
    monkeypatch.delenv("REDIS_SSL", raising=False)
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    with patch("litellm._redis.async_redis.BlockingConnectionPool") as mock_pool:
        get_redis_connection_pool(host="plain-redis.example.com", port=6379)

    call_kwargs = mock_pool.call_args.kwargs
    assert call_kwargs.get("connection_class") is not async_redis.SSLConnection
    assert "ssl" not in call_kwargs


def test_connection_pool_env_redis_ssl_false_uses_plain_connection(monkeypatch):
    """REDIS_SSL=false from the environment must not select SSLConnection."""
    monkeypatch.delenv("REDIS_URL", raising=False)
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)
    monkeypatch.setenv("REDIS_SSL", "false")

    pool = get_redis_connection_pool(host="plain-host", port=6379)

    assert pool is not None
    assert pool.connection_class is async_redis.Connection
    assert "ssl" not in pool.connection_kwargs


@pytest.mark.parametrize(
    "redis_config",
    [
        pytest.param({"host": "redis-host", "port": 6379}, id="host_port"),
        pytest.param({"url": "redis://redis-host:6379"}, id="url"),
    ],
)
def test_connection_pool_keeps_socket_timeout(redis_config, monkeypatch):
    """The async pool must carry socket_timeout however Redis was configured.

    The url branch used to rebuild pool kwargs from scratch as {timeout, url,
    max_connections}, dropping socket_timeout. redis-py then leaves both
    socket_timeout and socket_connect_timeout (which falls back to it) unset, so a
    Redis host that drops packets rather than refusing them blocks every caller
    indefinitely instead of failing fast.
    """
    monkeypatch.delenv("REDIS_URL", raising=False)
    monkeypatch.delenv("REDIS_HOST", raising=False)
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    pool = get_redis_connection_pool(socket_timeout=5.0, **redis_config)

    assert pool is not None
    assert pool.connection_kwargs.get("socket_timeout") == 5.0


@pytest.mark.parametrize(
    "redis_config",
    [
        pytest.param({"host": "redis-host", "port": 6379}, id="host_port"),
        pytest.param({"url": "redis://redis-host:6379"}, id="url"),
    ],
)
def test_sync_client_keeps_socket_timeout(redis_config, monkeypatch):
    """The sync client is built during RedisCache.__init__ and blocks the caller.

    Without socket_timeout it stalls for the OS TCP timeout against an unreachable
    host, so merely constructing the cache stops the process.
    """
    monkeypatch.delenv("REDIS_URL", raising=False)
    monkeypatch.delenv("REDIS_HOST", raising=False)
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    client = get_redis_client(socket_timeout=5.0, **redis_config)

    assert client.connection_pool.connection_kwargs.get("socket_timeout") == 5.0


@pytest.mark.parametrize(
    "redis_config",
    [
        pytest.param({"host": "redis-host", "port": 6379}, id="host_port"),
        pytest.param({"url": "redis://redis-host:6379"}, id="url"),
    ],
)
def test_async_client_keeps_socket_timeout(redis_config, monkeypatch):
    """Same invariant for the async client built without an injected pool."""
    monkeypatch.delenv("REDIS_URL", raising=False)
    monkeypatch.delenv("REDIS_HOST", raising=False)
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    client = get_redis_async_client(socket_timeout=5.0, **redis_config)

    assert client.connection_pool.connection_kwargs.get("socket_timeout") == 5.0


def test_url_config_does_not_forward_ssl_kwarg(monkeypatch):
    """ssl stays consumed rather than forwarded on the url path.

    TLS is selected by the rediss:// scheme there; handing ssl=True to a redis://
    url yields a plain Connection that rejects the kwarg when it first connects.
    """
    monkeypatch.delenv("REDIS_URL", raising=False)
    monkeypatch.delenv("REDIS_HOST", raising=False)
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    client = get_redis_client(url="redis://redis-host:6379", ssl=True)

    assert "ssl" not in client.connection_pool.connection_kwargs


@pytest.mark.parametrize(
    "client_only_kwarg",
    [
        pytest.param({"single_connection_client": True}, id="single_connection_client"),
        pytest.param({"auto_close_connection_pool": True}, id="auto_close_connection_pool"),
        pytest.param({"ssl_ca_certs": "/tmp/ca.pem"}, id="ssl_ca_certs"),
        pytest.param({"ssl": True}, id="ssl"),
    ],
)
def test_url_config_drops_kwargs_the_connection_cannot_accept(client_only_kwarg, monkeypatch):
    """Only kwargs the connection accepts may be forwarded on the url path.

    from_url hands its kwargs down to the connection class, so client-level settings and
    the SSLConnection-only ssl_* family raise TypeError the first time a connection is
    created. TLS on a url config comes from the rediss:// scheme instead.
    """
    monkeypatch.delenv("REDIS_URL", raising=False)
    monkeypatch.delenv("REDIS_HOST", raising=False)
    monkeypatch.delenv("REDIS_CLUSTER_NODES", raising=False)

    pool = get_redis_connection_pool(url="redis://redis-host:6379", socket_timeout=5.0, **client_only_kwarg)

    assert pool is not None
    pool.make_connection()
    assert pool.connection_kwargs.get("socket_timeout") == 5.0


def test_redis_uses_the_hiredis_response_parser():
    """The C parser must be the one redis-py actually picks.

    hiredis is declared in the `proxy` extra purely for speed; nothing imports it, so
    dropping it from pyproject.toml would silently fall back to the pure-Python parser
    with no other symptom. redis-py selects it at import time, so asserting on the
    selection is what catches that.
    """
    from redis._parsers import _HiredisParser
    from redis.connection import HIREDIS_AVAILABLE, DefaultParser

    assert HIREDIS_AVAILABLE, "hiredis is not installed; redis-py fell back to the pure-Python parser"
    assert DefaultParser is _HiredisParser, f"redis-py selected {DefaultParser.__name__}, expected _HiredisParser"

    client = get_redis_client(host="redis-host", port=6379)
    connection = client.connection_pool.make_connection()
    assert isinstance(connection._parser, _HiredisParser)


def test_init_arg_names_sees_through_decorated_inits():
    """redis-py >= 7.4 wraps AbstractConnection.__init__ with @deprecated_args, whose
    wrapper is declared (self, *args, **kwargs). Introspecting the wrapper directly
    yields no real parameters, which silently emptied the from_url allowlist and
    dropped socket_timeout from url-configured connections. The MRO walk must follow
    __wrapped__ to the true signature.
    """
    import functools

    from litellm._redis import _init_arg_names

    def deprecating(fn):
        @functools.wraps(fn)
        def wrapper(self, *args, **kwargs):
            return fn(self, *args, **kwargs)

        return wrapper

    class Base:
        @deprecating
        def __init__(self, socket_timeout=None, socket_connect_timeout=None):
            pass

    class Concrete(Base):
        def __init__(self, host=None, **kwargs):
            super().__init__(**kwargs)

    names = _init_arg_names(Concrete)
    assert "socket_timeout" in names
    assert "socket_connect_timeout" in names
    assert "host" in names


def test_url_allowlist_always_carries_socket_timeouts():
    """The load-bearing invariant behind test_url_config_* against the INSTALLED
    redis-py, whatever its version: if a redis-py release changes how its __init__
    signatures are declared (7.4 did, via @deprecated_args), this is the first
    assertion that goes red.
    """
    from litellm._redis import _get_redis_url_kwargs

    allowed = _get_redis_url_kwargs()
    assert "socket_timeout" in allowed
    assert "socket_connect_timeout" in allowed


AZURE_AD_CONNECT_FUNC = {"_azure_credential": object()}
GCP_IAM_CONNECT_FUNC = {"_gcp_service_account": "projects/-/serviceAccounts/sa@project.iam.gserviceaccount.com"}


@pytest.mark.parametrize(
    "markers, provider_cls",
    [
        (AZURE_AD_CONNECT_FUNC, AzureADCredentialProvider),
        (GCP_IAM_CONNECT_FUNC, GCPIAMCredentialProvider),
    ],
    ids=["azure_ad", "gcp_iam"],
)
def test_async_url_client_authenticates_through_credential_provider(markers, provider_cls):
    """A REDIS_URL config with Azure AD or GCP IAM must still reach the server with a credential.

    The url branch forwards redis_connect_func straight to the async connection, which runs
    its AUTH exchange with the blocking client API and dies, so the branch has to hand the
    connection a CredentialProvider instead.
    """
    redis_kwargs = {
        "url": "rediss://redis-host:6380",
        "redis_connect_func": SimpleNamespace(**markers),
    }

    with patch("litellm._redis._get_redis_client_logic", return_value=redis_kwargs):
        client = get_redis_async_client()

    connection_kwargs = client.connection_pool.connection_kwargs
    assert isinstance(connection_kwargs.get("credential_provider"), provider_cls)
    assert "redis_connect_func" not in connection_kwargs


@pytest.mark.parametrize(
    "markers, provider_cls",
    [
        (AZURE_AD_CONNECT_FUNC, AzureADCredentialProvider),
        (GCP_IAM_CONNECT_FUNC, GCPIAMCredentialProvider),
    ],
    ids=["azure_ad", "gcp_iam"],
)
def test_async_url_connection_pool_authenticates_through_credential_provider(markers, provider_cls):
    """Same for the pool-based path: every connection the pool hands out needs the provider."""
    redis_kwargs = {
        "url": "rediss://redis-host:6380",
        "redis_connect_func": SimpleNamespace(**markers),
    }

    with patch("litellm._redis._get_redis_client_logic", return_value=redis_kwargs):
        pool = get_redis_connection_pool()

    assert isinstance(pool.connection_kwargs.get("credential_provider"), provider_cls)
    assert "redis_connect_func" not in pool.connection_kwargs


def test_async_url_client_drops_username_alongside_credential_provider():
    """redis-py refuses a connection given both a username and a credential_provider, and
    AzureADCredentialProvider already carries REDIS_USERNAME, so the username must be dropped.
    """
    redis_kwargs = {
        "url": "rediss://redis-host:6380",
        "username": "redis-user",
        "redis_connect_func": SimpleNamespace(**AZURE_AD_CONNECT_FUNC),
    }

    with patch("litellm._redis._get_redis_client_logic", return_value=redis_kwargs):
        client = get_redis_async_client()

    pool = client.connection_pool
    assert "username" not in pool.connection_kwargs
    pool.connection_class(**pool.connection_kwargs)


@pytest.mark.parametrize("build_pool", [False, True], ids=["client", "pool"])
def test_async_url_keeps_a_coroutine_connect_func(build_pool):
    """redis-py awaits a coroutine redis_connect_func on an async connection, so one we cannot
    turn into a credential provider has to be left where it is rather than dropped.
    """

    async def connect(connection):
        return None

    redis_kwargs = {
        "url": "rediss://redis-host:6380",
        "redis_connect_func": connect,
    }

    with patch("litellm._redis._get_redis_client_logic", return_value=redis_kwargs):
        pool = get_redis_connection_pool() if build_pool else get_redis_async_client().connection_pool

    assert pool.connection_kwargs["redis_connect_func"] is connect
    assert "credential_provider" not in pool.connection_kwargs


def test_async_cluster_drops_a_connect_func_it_cannot_pass_on():
    """redis-py's async RedisCluster has no redis_connect_func parameter, so a connect func that
    is not translated into a credential provider has to be dropped rather than forwarded.
    """

    async def connect(connection):
        return None

    redis_kwargs = {
        "startup_nodes": [{"host": "cluster-node", "port": 6379}],
        "redis_connect_func": connect,
    }

    with patch("litellm._redis._get_redis_client_logic", return_value=redis_kwargs):
        client = get_redis_async_client()

    assert isinstance(client, async_redis.RedisCluster)


@pytest.mark.parametrize(
    "markers, provider_cls",
    [
        (AZURE_AD_CONNECT_FUNC, AzureADCredentialProvider),
        (GCP_IAM_CONNECT_FUNC, GCPIAMCredentialProvider),
    ],
    ids=["azure_ad", "gcp_iam"],
)
@pytest.mark.parametrize(
    "sentinel_password",
    [None, "sentinel-secret"],
    ids=["unauthenticated_monitors", "password_protected_monitors"],
)
def test_async_sentinel_keeps_the_credential_provider_off_the_monitors(markers, provider_cls, sentinel_password):
    """The Sentinel monitors are separate servers with their own password, so the data node's token
    never belongs on them: redis-py refuses it next to a Sentinel password, and sends it to an
    unauthenticated monitor as an AUTH the monitor rejects.
    """
    redis_kwargs = {
        "sentinel_nodes": [("sentinel-1", 26379)],
        "sentinel_password": sentinel_password,
        "service_name": "mymaster",
        "redis_connect_func": SimpleNamespace(**markers),
    }

    with patch("litellm._redis.async_redis.Sentinel") as mock_sentinel_cls:
        with patch("litellm._redis._get_redis_client_logic", return_value=redis_kwargs):
            get_redis_async_client()

    sentinel_kwargs = mock_sentinel_cls.call_args[1]["sentinel_kwargs"]
    assert sentinel_kwargs["password"] == sentinel_password
    assert "credential_provider" not in sentinel_kwargs

    monitor_connection = async_redis.Connection(host="sentinel-1", port=26379, **sentinel_kwargs)
    assert monitor_connection.credential_provider is None
    assert bool(monitor_connection.username or monitor_connection.password) is bool(sentinel_password)

    master_kwargs = mock_sentinel_cls.return_value.master_for.call_args[1]
    assert isinstance(master_kwargs["credential_provider"], provider_cls)
    assert "password" not in master_kwargs