Use async DocumentStore mixin tests in Weaviate

[davidsbatista]

As part of deepset-ai/haystack#10799, async test mixin classes are being added to haystack.testing.document_store. Once those are in place, the Weaviate integration should inherit the relevant mixins to avoid maintaining duplicate test code.

What needs to be done

In integrations/weaviate/tests/test_document_store_async.py, update the async test class to inherit the appropriate mixin classes:

from haystack.testing.document_store import (
    CountDocumentsAsyncTest,
    WriteDocumentsAsyncTest,
    DeleteAllAsyncTest,
    DeleteByFilterAsyncTest,
    UpdateByFilterAsyncTest,
    CountDocumentsByFilterAsyncTest,
    CountUniqueMetadataByFilterAsyncTest,
    GetMetadataFieldsInfoAsyncTest,
    GetMetadataFieldMinMaxAsyncTest,
    GetMetadataFieldUniqueValuesAsyncTest,
)

Note: Weaviate does not appear to implement delete_documents_async or filter_documents_async directly — verify before adding DeleteDocumentsAsyncTest or FilterDocumentsAsyncTest.

Tests that can be removed (covered by mixins)

• test_write_documents_async
• test_count_documents_async
• test_filter_documents_below_default_limit_async
• test_delete_by_filter_async
• test_update_by_filter_async
• test_count_documents_by_filter_async
• test_get_metadata_fields_info_async
• test_get_metadata_field_min_max_async
• test_get_metadata_field_min_max_async_with_meta_prefix
• test_count_unique_metadata_by_filter_async
• test_get_metadata_field_unique_values_async
• test_delete_all_documents_recreate_async
• test_delete_all_documents_batch_size_async

Tests to keep (Weaviate-specific)

• test_close_async
• test_filter_documents_with_blob_data_async
• test_filter_documents_over_default_limit (Weaviate default limit behaviour)
• test_write_documents_with_blob_data_async
• test_bm25_retrieval_async
• test_bm25_retrieval_async_with_filters
• test_embedding_retrieval_async
• test_embedding_retrieval_async_with_filters
• test_embedding_retrieval_async_distance_and_certainty_error
• test_hybrid_retrieval_async
• test_hybrid_retrieval_async_with_filters
• test_hybrid_retrieval_async_with_alpha
• test_update_by_filter_async_with_pagination (Weaviate-specific pagination behaviour)
• test_get_metadata_field_min_max_async_unsupported_type (Weaviate-specific error case)
• test_get_metadata_field_min_max_async_field_not_found (Weaviate-specific error case)
• test_count_unique_metadata_by_filter_async_with_meta_prefix
• test_count_unique_metadata_by_filter_async_no_matches
• test_count_unique_metadata_by_filter_async_field_not_found
• test_get_metadata_field_unique_values_async_with_meta_prefix
• test_get_metadata_field_unique_values_async_with_search_term
• test_get_metadata_field_unique_values_async_with_pagination
• test_get_metadata_field_unique_values_async_field_not_found
• test_get_metadata_field_unique_values_async_empty_result
• test_delete_all_documents_excessive_batch_size_async (Weaviate-specific batch limit)

Acceptance criteria

• The async test class inherits the relevant async mixin classes
• The document_store async fixture is correctly wired up
• All duplicate tests listed above are removed
• All Weaviate-specific tests are preserved
• The full test suite passes