litellm/tests/test_litellm/caching/test_qdrant_semantic_cache.py

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

import pytest

sys.path.insert(
    0, os.path.abspath("../../..")
)  # Adds the parent directory to the system path


def test_qdrant_semantic_cache_initialization(monkeypatch):
    """
    Test QDRANT semantic cache initialization with proper parameters.
    Verifies that the cache is initialized correctly with given configuration.
    """
    # Mock the httpx clients and API calls
    with (
        patch(
            "litellm.llms.custom_httpx.http_handler._get_httpx_client"
        ) as mock_sync_client,
        patch("litellm.llms.custom_httpx.http_handler.get_async_httpx_client"),
    ):

        # Mock the collection exists check
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {"result": {"exists": True}}

        mock_sync_client_instance = MagicMock()
        mock_sync_client_instance.get.return_value = mock_response
        mock_index_response = MagicMock()
        mock_index_response.status_code = 200
        mock_sync_client_instance.put.return_value = mock_index_response
        mock_sync_client.return_value = mock_sync_client_instance

        from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

        # Initialize the cache with similarity threshold
        qdrant_cache = QdrantSemanticCache(
            collection_name="test_collection",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
            similarity_threshold=0.8,
        )

        # Verify the cache was initialized with correct parameters
        assert qdrant_cache.collection_name == "test_collection"
        assert qdrant_cache.qdrant_api_base == "http://test.qdrant.local"
        assert qdrant_cache.qdrant_api_key == "test_key"
        assert qdrant_cache.similarity_threshold == 0.8
        mock_sync_client_instance.put.assert_called_once_with(
            url="http://test.qdrant.local/collections/test_collection/index",
            headers={
                "Content-Type": "application/json",
                "api-key": "test_key",
            },
            json={
                "field_name": QdrantSemanticCache.CACHE_KEY_FIELD_NAME,
                "field_schema": "keyword",
            },
        )

    # Test initialization with missing similarity_threshold
    with pytest.raises(Exception, match="similarity_threshold must be provided"):
        QdrantSemanticCache(
            collection_name="test_collection",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
        )


def test_qdrant_semantic_cache_get_cache_hit():
    """
    Test QDRANT semantic cache get method when there's a cache hit.
    Verifies that cached results are properly retrieved and parsed.
    """
    with (
        patch(
            "litellm.llms.custom_httpx.http_handler._get_httpx_client"
        ) as mock_sync_client,
        patch("litellm.llms.custom_httpx.http_handler.get_async_httpx_client"),
    ):

        # Mock the collection exists check
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {"result": {"exists": True}}

        mock_sync_client_instance = MagicMock()
        mock_sync_client_instance.get.return_value = mock_response
        mock_sync_client.return_value = mock_sync_client_instance

        from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

        # Initialize cache
        qdrant_cache = QdrantSemanticCache(
            collection_name="test_collection",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
            similarity_threshold=0.8,
        )

        # Mock a cache hit result from search API
        mock_search_response = MagicMock()
        mock_search_response.status_code = 200
        mock_search_response.json.return_value = {
            "result": [
                {
                    "payload": {
                        QdrantSemanticCache.CACHE_KEY_FIELD_NAME: "test_key",
                        "text": "What is the capital of France?",  # Original prompt
                        "response": '{"id": "test-123", "choices": [{"message": {"content": "Paris is the capital of France."}}]}',
                    },
                    "score": 0.9,
                }
            ]
        }
        qdrant_cache.sync_client.post = MagicMock(return_value=mock_search_response)

        # Mock the embedding function
        with patch(
            "litellm.embedding", return_value={"data": [{"embedding": [0.1, 0.2, 0.3]}]}
        ):
            # Test get_cache with a message
            result = qdrant_cache.get_cache(
                key="test_key", messages=[{"content": "What is the capital of France?"}]
            )

            # Verify result is properly parsed
            expected_result = {
                "id": "test-123",
                "choices": [
                    {"message": {"content": "Paris is the capital of France."}}
                ],
            }
            assert result == expected_result

            # Verify search was called
            qdrant_cache.sync_client.post.assert_called()
            assert qdrant_cache.sync_client.post.call_args.kwargs["json"]["filter"] == {
                "must": [
                    {
                        "key": QdrantSemanticCache.CACHE_KEY_FIELD_NAME,
                        "match": {"value": "test_key"},
                    }
                ]
            }


def test_qdrant_semantic_cache_rejects_unscoped_cache_hit():
    """
    Test QDRANT semantic cache rejects old or unscoped cache hits.

    Legacy points have only text and response payloads, so they cannot be
    safely migrated to a generated LiteLLM cache key.
    """
    with (
        patch(
            "litellm.llms.custom_httpx.http_handler._get_httpx_client"
        ) as mock_sync_client,
        patch("litellm.llms.custom_httpx.http_handler.get_async_httpx_client"),
    ):

        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {"result": {"exists": True}}

        mock_sync_client_instance = MagicMock()
        mock_sync_client_instance.get.return_value = mock_response
        mock_sync_client.return_value = mock_sync_client_instance

        from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

        qdrant_cache = QdrantSemanticCache(
            collection_name="test_collection",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
            similarity_threshold=0.8,
        )

        mock_search_response = MagicMock()
        mock_search_response.status_code = 200
        mock_search_response.json.return_value = {
            "result": [
                {
                    "payload": {
                        "text": "What is the capital of France?",
                        "response": '{"id": "test-123"}',
                    },
                    "score": 0.9,
                }
            ]
        }
        qdrant_cache.sync_client.post = MagicMock(return_value=mock_search_response)

        with patch(
            "litellm.embedding", return_value={"data": [{"embedding": [0.1, 0.2, 0.3]}]}
        ):
            metadata = {}
            result = qdrant_cache.get_cache(
                key="test_key",
                messages=[{"content": "What is the capital of France?"}],
                metadata=metadata,
            )

        assert result is None
        assert metadata["semantic-similarity"] == 0.0


def test_qdrant_semantic_cache_payload_index_failure_is_non_blocking():
    from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

    qdrant_cache = QdrantSemanticCache.__new__(QdrantSemanticCache)
    qdrant_cache.qdrant_api_base = "http://test.qdrant.local"
    qdrant_cache.collection_name = "test_collection"
    qdrant_cache.headers = {"Content-Type": "application/json"}
    qdrant_cache.sync_client = MagicMock()
    response = MagicMock()
    response.status_code = 400
    response.text = "bad index"
    qdrant_cache.sync_client.put.return_value = response

    qdrant_cache._ensure_cache_key_payload_index()

    qdrant_cache.sync_client.put.assert_called_once()


def test_qdrant_semantic_cache_payload_index_exception_is_non_blocking():
    from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

    qdrant_cache = QdrantSemanticCache.__new__(QdrantSemanticCache)
    qdrant_cache.qdrant_api_base = "http://test.qdrant.local"
    qdrant_cache.collection_name = "test_collection"
    qdrant_cache.headers = {"Content-Type": "application/json"}
    qdrant_cache.sync_client = MagicMock()
    qdrant_cache.sync_client.put.side_effect = Exception("boom")

    qdrant_cache._ensure_cache_key_payload_index()

    qdrant_cache.sync_client.put.assert_called_once()


def _mock_qdrant_get_cache_result(qdrant_result):
    from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

    qdrant_cache = QdrantSemanticCache.__new__(QdrantSemanticCache)
    qdrant_cache.embedding_model = "text-embedding-ada-002"
    qdrant_cache.qdrant_api_base = "http://test.qdrant.local"
    qdrant_cache.collection_name = "test_collection"
    qdrant_cache.headers = {
        "Content-Type": "application/json",
        "api-key": "test_key",
    }
    qdrant_cache.similarity_threshold = 0.8
    qdrant_cache.sync_client = MagicMock()

    mock_search_response = MagicMock()
    mock_search_response.status_code = 200
    mock_search_response.json.return_value = {"result": qdrant_result}
    qdrant_cache.sync_client.post.return_value = mock_search_response

    return qdrant_cache, QdrantSemanticCache


@pytest.mark.parametrize("qdrant_result", [None, []])
def test_qdrant_semantic_cache_get_cache_sets_metadata_on_empty_miss(qdrant_result):
    qdrant_cache, _ = _mock_qdrant_get_cache_result(qdrant_result)
    metadata = {}

    with patch(
        "litellm.embedding", return_value={"data": [{"embedding": [0.1, 0.2, 0.3]}]}
    ):
        result = qdrant_cache.get_cache(
            key="test_key",
            messages=[{"content": "What is the capital of Spain?"}],
            metadata=metadata,
        )

    assert result is None
    assert metadata["semantic-similarity"] == 0.0


def test_qdrant_semantic_cache_get_cache_sets_metadata_on_below_threshold_miss():
    from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

    qdrant_cache, _ = _mock_qdrant_get_cache_result(
        [
            {
                "payload": {
                    QdrantSemanticCache.CACHE_KEY_FIELD_NAME: "test_key",
                    "text": "What is the capital of Spain?",
                    "response": '{"id": "test-456"}',
                },
                "score": 0.7,
            }
        ]
    )
    metadata = {}

    with patch(
        "litellm.embedding", return_value={"data": [{"embedding": [0.1, 0.2, 0.3]}]}
    ):
        result = qdrant_cache.get_cache(
            key="test_key",
            messages=[{"content": "What is the capital of Spain?"}],
            metadata=metadata,
        )

    assert result is None
    assert metadata["semantic-similarity"] == 0.7


def test_qdrant_semantic_cache_get_cache_miss():
    """
    Test QDRANT semantic cache get method when there's a cache miss.
    Verifies that None is returned when no similar cached results are found.
    """
    with (
        patch(
            "litellm.llms.custom_httpx.http_handler._get_httpx_client"
        ) as mock_sync_client,
        patch("litellm.llms.custom_httpx.http_handler.get_async_httpx_client"),
    ):

        # Mock the collection exists check
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {"result": {"exists": True}}

        mock_sync_client_instance = MagicMock()
        mock_sync_client_instance.get.return_value = mock_response
        mock_sync_client.return_value = mock_sync_client_instance

        from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

        # Initialize cache
        qdrant_cache = QdrantSemanticCache(
            collection_name="test_collection",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
            similarity_threshold=0.8,
        )

        # Mock a cache miss (no results)
        mock_search_response = MagicMock()
        mock_search_response.status_code = 200
        mock_search_response.json.return_value = {"result": []}
        qdrant_cache.sync_client.post = MagicMock(return_value=mock_search_response)

        # Mock the embedding function
        with patch(
            "litellm.embedding", return_value={"data": [{"embedding": [0.1, 0.2, 0.3]}]}
        ):
            # Test get_cache with a message
            result = qdrant_cache.get_cache(
                key="test_key", messages=[{"content": "What is the capital of Spain?"}]
            )

            # Verify None is returned for cache miss
            assert result is None

            # Verify search was called
            qdrant_cache.sync_client.post.assert_called()


@pytest.mark.asyncio
async def test_qdrant_semantic_cache_async_get_cache_hit():
    """
    Test QDRANT semantic cache async get method when there's a cache hit.
    Verifies that cached results are properly retrieved and parsed asynchronously.
    """
    with (
        patch(
            "litellm.llms.custom_httpx.http_handler._get_httpx_client"
        ) as mock_sync_client,
        patch(
            "litellm.llms.custom_httpx.http_handler.get_async_httpx_client"
        ) as mock_async_client,
    ):

        # Mock the collection exists check
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {"result": {"exists": True}}

        mock_sync_client_instance = MagicMock()
        mock_sync_client_instance.get.return_value = mock_response
        mock_sync_client.return_value = mock_sync_client_instance

        # Mock async client
        mock_async_client_instance = AsyncMock()
        mock_async_client.return_value = mock_async_client_instance

        from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

        # Initialize cache
        qdrant_cache = QdrantSemanticCache(
            collection_name="test_collection",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
            similarity_threshold=0.8,
        )

        # Mock a cache hit result from async search API
        # Note: .json() should be sync even for async responses
        mock_search_response = MagicMock()
        mock_search_response.status_code = 200
        mock_search_response.json.return_value = {
            "result": [
                {
                    "payload": {
                        QdrantSemanticCache.CACHE_KEY_FIELD_NAME: "test_key",
                        "text": "What is the capital of Spain?",  # Original prompt
                        "response": '{"id": "test-456", "choices": [{"message": {"content": "Madrid is the capital of Spain."}}]}',
                    },
                    "score": 0.85,
                }
            ]
        }
        qdrant_cache.async_client.post = AsyncMock(return_value=mock_search_response)

        # Mock the async embedding function
        with patch(
            "litellm.aembedding",
            return_value={"data": [{"embedding": [0.4, 0.5, 0.6]}]},
        ):
            # Test async_get_cache with a message
            result = await qdrant_cache.async_get_cache(
                key="test_key",
                messages=[{"content": "What is the capital of Spain?"}],
                metadata={},
            )

            # Verify result is properly parsed
            expected_result = {
                "id": "test-456",
                "choices": [
                    {"message": {"content": "Madrid is the capital of Spain."}}
                ],
            }
            assert result == expected_result

            # Verify async search was called
            qdrant_cache.async_client.post.assert_called()
            assert qdrant_cache.async_client.post.call_args.kwargs["json"][
                "filter"
            ] == {
                "must": [
                    {
                        "key": QdrantSemanticCache.CACHE_KEY_FIELD_NAME,
                        "match": {"value": "test_key"},
                    }
                ]
            }


@pytest.mark.asyncio
async def test_qdrant_semantic_cache_async_get_cache_miss():
    """
    Test QDRANT semantic cache async get method when there's a cache miss.
    Verifies that None is returned when no similar cached results are found.
    """
    with (
        patch(
            "litellm.llms.custom_httpx.http_handler._get_httpx_client"
        ) as mock_sync_client,
        patch(
            "litellm.llms.custom_httpx.http_handler.get_async_httpx_client"
        ) as mock_async_client,
    ):

        # Mock the collection exists check
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {"result": {"exists": True}}

        mock_sync_client_instance = MagicMock()
        mock_sync_client_instance.get.return_value = mock_response
        mock_sync_client.return_value = mock_sync_client_instance

        # Mock async client
        mock_async_client_instance = AsyncMock()
        mock_async_client.return_value = mock_async_client_instance

        from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

        # Initialize cache
        qdrant_cache = QdrantSemanticCache(
            collection_name="test_collection",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
            similarity_threshold=0.8,
        )

        # Mock a cache miss (no results)
        mock_search_response = MagicMock()  # Note: .json() should be sync
        mock_search_response.status_code = 200
        mock_search_response.json.return_value = {"result": []}
        qdrant_cache.async_client.post = AsyncMock(return_value=mock_search_response)

        # Mock the async embedding function
        with patch(
            "litellm.aembedding",
            return_value={"data": [{"embedding": [0.7, 0.8, 0.9]}]},
        ):
            # Test async_get_cache with a message
            result = await qdrant_cache.async_get_cache(
                key="test_key",
                messages=[{"content": "What is the capital of Italy?"}],
                metadata={},
            )

            # Verify None is returned for cache miss
            assert result is None

            # Verify async search was called
            qdrant_cache.async_client.post.assert_called()


def test_qdrant_semantic_cache_set_cache():
    """
    Test QDRANT semantic cache set method.
    Verifies that responses are properly stored in the cache.
    """
    with (
        patch(
            "litellm.llms.custom_httpx.http_handler._get_httpx_client"
        ) as mock_sync_client,
        patch("litellm.llms.custom_httpx.http_handler.get_async_httpx_client"),
    ):

        # Mock the collection exists check
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {"result": {"exists": True}}

        mock_sync_client_instance = MagicMock()
        mock_sync_client_instance.get.return_value = mock_response
        mock_sync_client.return_value = mock_sync_client_instance

        from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

        # Initialize cache
        qdrant_cache = QdrantSemanticCache(
            collection_name="test_collection",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
            similarity_threshold=0.8,
        )

        # Mock the upsert method
        mock_upsert_response = MagicMock()
        mock_upsert_response.status_code = 200
        qdrant_cache.sync_client.put = MagicMock(return_value=mock_upsert_response)

        # Mock response to cache
        response_to_cache = {
            "id": "test-789",
            "choices": [{"message": {"content": "Rome is the capital of Italy."}}],
        }

        # Mock the embedding function
        with patch(
            "litellm.embedding", return_value={"data": [{"embedding": [0.1, 0.1, 0.1]}]}
        ):
            # Test set_cache
            qdrant_cache.set_cache(
                key="test_key",
                value=response_to_cache,
                messages=[{"content": "What is the capital of Italy?"}],
            )

            # Verify upsert was called
            qdrant_cache.sync_client.put.assert_called()
            upsert_payload = qdrant_cache.sync_client.put.call_args.kwargs["json"][
                "points"
            ][0]["payload"]
            assert (
                upsert_payload[QdrantSemanticCache.CACHE_KEY_FIELD_NAME] == "test_key"
            )


@pytest.mark.asyncio
async def test_qdrant_semantic_cache_async_set_cache():
    """
    Test QDRANT semantic cache async set method.
    Verifies that responses are properly stored in the cache asynchronously.
    """
    with (
        patch(
            "litellm.llms.custom_httpx.http_handler._get_httpx_client"
        ) as mock_sync_client,
        patch(
            "litellm.llms.custom_httpx.http_handler.get_async_httpx_client"
        ) as mock_async_client,
    ):

        # Mock the collection exists check
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {"result": {"exists": True}}

        mock_sync_client_instance = MagicMock()
        mock_sync_client_instance.get.return_value = mock_response
        mock_sync_client.return_value = mock_sync_client_instance

        # Mock async client
        mock_async_client_instance = AsyncMock()
        mock_async_client.return_value = mock_async_client_instance

        from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

        # Initialize cache
        qdrant_cache = QdrantSemanticCache(
            collection_name="test_collection",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
            similarity_threshold=0.8,
        )

        # Mock the async upsert method
        mock_upsert_response = MagicMock()  # Note: .json() should be sync
        mock_upsert_response.status_code = 200
        qdrant_cache.async_client.put = AsyncMock(return_value=mock_upsert_response)

        # Mock response to cache
        response_to_cache = {
            "id": "test-999",
            "choices": [{"message": {"content": "Berlin is the capital of Germany."}}],
        }

        # Mock the async embedding function
        with patch(
            "litellm.aembedding",
            return_value={"data": [{"embedding": [0.2, 0.2, 0.2]}]},
        ):
            # Test async_set_cache
            await qdrant_cache.async_set_cache(
                key="test_key",
                value=response_to_cache,
                messages=[{"content": "What is the capital of Germany?"}],
                metadata={},
            )

            # Verify async upsert was called
            qdrant_cache.async_client.put.assert_called()
            upsert_payload = qdrant_cache.async_client.put.call_args.kwargs["json"][
                "points"
            ][0]["payload"]
            assert (
                upsert_payload[QdrantSemanticCache.CACHE_KEY_FIELD_NAME] == "test_key"
            )


def test_qdrant_semantic_cache_custom_vector_size():
    """
    Test that QdrantSemanticCache uses a custom vector_size when creating a new collection.
    Verifies that the vector size passed to the constructor is used in the Qdrant collection
    creation payload instead of the default 1536.
    """
    with (
        patch(
            "litellm.llms.custom_httpx.http_handler._get_httpx_client"
        ) as mock_sync_client,
        patch("litellm.llms.custom_httpx.http_handler.get_async_httpx_client"),
    ):

        # Mock the collection does NOT exist (so it will be created)
        mock_exists_response = MagicMock()
        mock_exists_response.status_code = 200
        mock_exists_response.json.return_value = {"result": {"exists": False}}

        # Mock the collection creation response
        mock_create_response = MagicMock()
        mock_create_response.status_code = 200
        mock_create_response.json.return_value = {"result": True}

        # Mock the collection details response after creation
        mock_details_response = MagicMock()
        mock_details_response.status_code = 200
        mock_details_response.json.return_value = {"result": {"status": "ok"}}

        mock_sync_client_instance = MagicMock()
        mock_sync_client_instance.get.side_effect = [
            mock_exists_response,
            mock_details_response,
        ]
        mock_sync_client_instance.put.return_value = mock_create_response
        mock_sync_client.return_value = mock_sync_client_instance

        from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

        # Initialize with custom vector_size of 768
        qdrant_cache = QdrantSemanticCache(
            collection_name="test_collection_768",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
            similarity_threshold=0.8,
            vector_size=768,
        )

        # Verify the vector_size attribute is set correctly
        assert qdrant_cache.vector_size == 768

        # Verify the PUT call to create the collection used vector_size=768
        put_call = next(
            call
            for call in mock_sync_client_instance.put.call_args_list
            if call.kwargs["url"]
            == "http://test.qdrant.local/collections/test_collection_768"
        )
        create_payload = put_call.kwargs["json"]
        assert create_payload["vectors"]["size"] == 768
        assert create_payload["vectors"]["distance"] == "Cosine"


def test_qdrant_semantic_cache_default_vector_size():
    """
    Test that QdrantSemanticCache defaults to QDRANT_VECTOR_SIZE (1536) when vector_size
    is not provided, and stores it as self.vector_size.
    """
    with (
        patch(
            "litellm.llms.custom_httpx.http_handler._get_httpx_client"
        ) as mock_sync_client,
        patch("litellm.llms.custom_httpx.http_handler.get_async_httpx_client"),
    ):

        # Mock the collection exists check
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {"result": {"exists": True}}

        mock_sync_client_instance = MagicMock()
        mock_sync_client_instance.get.return_value = mock_response
        mock_sync_client.return_value = mock_sync_client_instance

        from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache
        from litellm.constants import QDRANT_VECTOR_SIZE

        # Initialize without vector_size
        qdrant_cache = QdrantSemanticCache(
            collection_name="test_collection",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
            similarity_threshold=0.8,
        )

        # Verify it falls back to the default QDRANT_VECTOR_SIZE constant
        assert qdrant_cache.vector_size == QDRANT_VECTOR_SIZE


def test_qdrant_semantic_cache_large_vector_size():
    """
    Test that QdrantSemanticCache supports large embedding dimensions (e.g. 4096, 8192)
    for models like Stella, bge-en-icl, etc.
    """
    with (
        patch(
            "litellm.llms.custom_httpx.http_handler._get_httpx_client"
        ) as mock_sync_client,
        patch("litellm.llms.custom_httpx.http_handler.get_async_httpx_client"),
    ):

        # Mock the collection does NOT exist (so it will be created)
        mock_exists_response = MagicMock()
        mock_exists_response.status_code = 200
        mock_exists_response.json.return_value = {"result": {"exists": False}}

        mock_create_response = MagicMock()
        mock_create_response.status_code = 200
        mock_create_response.json.return_value = {"result": True}

        mock_details_response = MagicMock()
        mock_details_response.status_code = 200
        mock_details_response.json.return_value = {"result": {"status": "ok"}}

        mock_sync_client_instance = MagicMock()
        mock_sync_client_instance.get.side_effect = [
            mock_exists_response,
            mock_details_response,
        ]
        mock_sync_client_instance.put.return_value = mock_create_response
        mock_sync_client.return_value = mock_sync_client_instance

        from litellm.caching.qdrant_semantic_cache import QdrantSemanticCache

        # Initialize with a large vector_size of 4096
        qdrant_cache = QdrantSemanticCache(
            collection_name="test_collection_4096",
            qdrant_api_base="http://test.qdrant.local",
            qdrant_api_key="test_key",
            similarity_threshold=0.8,
            vector_size=4096,
        )

        assert qdrant_cache.vector_size == 4096

        # Verify the collection was created with 4096
        put_call = next(
            call
            for call in mock_sync_client_instance.put.call_args_list
            if call.kwargs["url"]
            == "http://test.qdrant.local/collections/test_collection_4096"
        )
        create_payload = put_call.kwargs["json"]
        assert create_payload["vectors"]["size"] == 4096