refactor!: Elasticsearch - use async mixin tests and fix write/delete behaviour by SyedShahmeerAli12 · Pull Request #3196 · deepset-ai/haystack-core-integrations

SyedShahmeerAli12 · 2026-04-21T18:39:29Z

Summary

Replaces the duplicated async test methods in test_document_store_async.py with mixin classes from haystack.testing.document_store_async, which shipped in haystack v2.28.0.

What changed:

TestElasticsearchDocumentStoreAsync now inherits from all applicable async mixin classes (CountDocumentsAsyncTest, WriteDocumentsAsyncTest, DeleteDocumentsAsyncTest, DeleteAllAsyncTest, DeleteByFilterAsyncTest, FilterDocumentsAsyncTest, UpdateByFilterAsyncTest, CountDocumentsByFilterAsyncTest, CountUniqueMetadataByFilterAsyncTest, GetMetadataFieldsInfoAsyncTest, GetMetadataFieldMinMaxAsyncTest, GetMetadataFieldUniqueValuesAsyncTest)
Elasticsearch-specific tests retained: BM25 retrieval, embedding retrieval, sparse vector handling, index recreation, SQL queries
Fixture updated to pytest_asyncio.fixture (async)
haystack-ai minimum version bumped to >=2.28.0 (when async mixin was released)
Net result: -436 lines / +89 lines

Overridden mixin tests (ES behavior deviations):

Several mixin tests were overridden because Elasticsearch's behavior differs from the standard interface contract:

Test	Expected (mixin)	Actual (ES)
`test_write_documents_duplicate_fail_async`	raises `DuplicateDocumentError`	raises `DocumentStoreError`
`test_write_documents_duplicate_skip_async`	returns `0` when skipping existing doc	returns `1`
`test_delete_documents_empty_document_store_async`	no-op (no error)	raises `DocumentStoreError`
`test_delete_documents_non_existing_document_async`	no-op (no error)	raises `DocumentStoreError`

These deviations look like bugs in the Elasticsearch document store implementation and are worth fixing in a follow-up PR to align ES with the standard interface.

Test plan

Integration tests pass against a live Elasticsearch instance

Replace duplicated async test methods with mixin classes from `haystack.testing.document_store_async`, available since haystack v2.28.0. Elasticsearch-specific tests (BM25, embedding retrieval, sparse vectors, index recreation, SQL queries) are kept in place. Closes deepset-ai#3047

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github-actions · 2026-04-21T19:13:44Z

Coverage report (elasticsearch)

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
integrations/elasticsearch/src/haystack_integrations/document_stores/elasticsearch
document_store.py					646-660, 704-744, 786-788
Project Total

_{This report was generated by python-coverage-comment-action}

SyedShahmeerAli12 · 2026-04-21T19:18:15Z

While wiring up the mixin tests I noticed a few places where Elasticsearch's behaviour differs from the standard DocumentStore interface contract:

write_documents_async with DuplicatePolicy.FAIL raises DocumentStoreError instead of DuplicateDocumentError
write_documents_async with DuplicatePolicy.SKIP returns 1 instead of 0 when the document already exists
delete_documents_async raises DocumentStoreError instead of silently ignoring non-existent IDs

I've overridden those mixin tests to match the current ES behaviour so CI passes, but these look like bugs worth fixing in a follow-up PR to bring ES in line with the rest of the document stores.

anakin87 · 2026-04-22T06:47:43Z

-        """
-        Basic fixture providing a document store instance for async tests
-        """
        hosts = ["http://localhost:9200"]
-        # Use a different index for each test so we can run them in parallel


do not remove these comments, please

anakin87 · 2026-04-22T06:48:33Z


    @pytest.mark.asyncio
    async def test_write_documents_async_with_sparse_embedding_warning(self, document_store, caplog):
-        """Test write_documents with document containing sparse_embedding field"""


restore all removed docstrings/comments

anakin87 · 2026-04-22T06:49:26Z

I've overridden those mixin tests to match the current ES behaviour so CI passes, but these look like bugs worth fixing in a follow-up PR to bring ES in line with the rest of the document stores.

I agree, let's fix these behaviors and then remove tests overrides

Fix three async behavior deviations from the standard DocumentStore interface: - write_documents_async with DuplicatePolicy.FAIL now raises DuplicateDocumentError instead of DocumentStoreError (outer try/except was swallowing the inner DuplicateDocumentError) - write_documents_async with DuplicatePolicy.SKIP now returns 0 when skipping an existing document (errors are now categorized like the sync version: version_conflict_engine_exception with SKIP policy is silently ignored) - delete_documents_async no longer raises on non-existent IDs (adds raise_on_error=False to match the sync version behaviour) Also restore docstrings and inline comments that were accidentally removed in the previous refactor commit.

…ip counting

anakin87 · 2026-04-22T08:29:39Z

@SyedShahmeerAli12 ping me when you need another review.
Also, let's rename this PR to make the changes more visible

SyedShahmeerAli12 · 2026-04-22T08:31:02Z

@anakin87

PR renamed and comment left. We addressed both inline comments (restored docstrings/comments) and the bug fixes you asked for. Now waiting for your re-review.

…val_async

SyedShahmeerAli12

Hi @anakin87 inline comments restored in test_embedding_retrieval_async.

For the two try/except removals, both were intentional bug fixes:

write_documents_async (line 714): The original outer except Exception was catching DuplicateDocumentError (a subclass of DocumentStoreError) that we raised inside the try block, then re-wrapping it as a generic DocumentStoreError. So callers using DuplicatePolicy.FAIL never actually received DuplicateDocumentError it was always swallowed into DocumentStoreError. Removing it and rewriting the error categorization to match the sync write_documents fixes this.

delete_documents_async (line 788): The original had no raise_on_error=False, so async_bulk would raise BulkIndexError when deleting non-existent IDs, which the try/except then re-raised as DocumentStoreError. The sync delete_documents uses raise_on_error=False and no try/except to silently ignore missing IDs. Adding raise_on_error=False makes the try/except redundant and aligns the behaviour with the sync version.

anakin87 · 2026-04-22T09:46:05Z

https://github.com/deepset-ai/haystack-core-integrations/pull/3196/files

There are still several removed comments

anakin87 · 2026-04-22T09:47:14Z

While wiring up the mixin tests I noticed a few places where Elasticsearch's behaviour differs from the standard DocumentStore interface contract:

write_documents_async with DuplicatePolicy.FAIL raises DocumentStoreError instead of DuplicateDocumentError

write_documents_async with DuplicatePolicy.SKIP returns 1 instead of 0 when the document already exists

delete_documents_async raises DocumentStoreError instead of silently ignoring non-existent IDs

I've overridden those mixin tests to match the current ES behaviour so CI passes, but these look like bugs worth fixing in a follow-up PR to bring ES in line with the rest of the document stores.

@davidsbatista these changes look right to me but could you please double-check?

…sync tests

SyedShahmeerAli12 · 2026-04-22T11:08:17Z

@anakin87 all comments from kept tests are restored. The remaining removed lines in the diff are from test method intentionally deleted as part of this refactor they're now covered by the mixin classes, so their comments go away with them.

anakin87 · 2026-04-22T12:57:47Z

        docs = [Document(id="1", content="A first document"), Document(id="2", content="Second document")]
        await document_store.write_documents_async(docs)

-        # capture index structure before deletion


restore this

anakin87 · 2026-04-22T12:57:54Z

        await document_store.delete_all_documents_async(recreate_index=True)
        assert await document_store.count_documents_async() == 0

-        # verify index structure is preserved


restore this

anakin87 · 2026-04-22T12:58:09Z

        settings_before["index"].pop("creation_date", None)
        assert settings_after == settings_before, "delete_all_documents_async should preserve index settings"

-        # verify index can accept new documents and retrieve


restore this

anakin87 · 2026-04-22T12:58:16Z

-        results = await document_store.filter_documents_async()
-        assert len(results) == 1
-        assert results[0].content == "New document after delete all"


restore this

…doc stores

davidsbatista · 2026-04-22T13:54:59Z

So, state of this PR, after having a look.

The mixin tests enforced the standard Haystack interface contract, revealing that the existing write_documents_async and delete_documents_async implementations deviated from it.

write_documents_async

DuplicatePolicy.SKIP return value: Writing a document that already exists with DuplicatePolicy.SKIP now correctly returns 0. Previously, it was silently overwriting the document and returning 1. (breaking change)
DuplicatePolicy.FAIL raises DuplicateDocumentError: Previously raised a generic DocumentStoreError. Now raises the more specific DuplicateDocumentError, consistent with write_documents (sync) and the standard Haystack interface. Also, the error message format changed: The error now reports all duplicate IDs in a single message instead of stopping at the first one.

delete_documents_async

deleting non-existent documents is now a no-op: Previously raised DocumentStoreError when a document ID did not exist. It now silently does nothing, matching the behaviour of delete_documents (sync) and the standard Haystack interface. (breaking change)

Regarding the tests

Removed test	Replaced by mixin
`test_count_documents_async`	`CountDocumentsAsyncTest.test_count_not_empty_async` (overridden)
`test_delete_documents_async`	`DeleteDocumentsAsyncTest.test_delete_documents_async`
`test_filter_documents_async`	`FilterDocumentsAsyncTest` — 3 tests (`test_no_filters_async`, `test_filter_simple_async`, `test_filter_compound_async`)
`test_delete_all_documents_async`	`DeleteAllAsyncTest.test_delete_all_documents_async`
`test_delete_by_filter_async`	`DeleteByFilterAsyncTest.test_delete_by_filter_async`
`test_update_by_filter_async`	`UpdateByFilterAsyncTest.test_update_by_filter_async`
`test_count_documents_by_filter_async`	`CountDocumentsByFilterAsyncTest` — 4 tests
`test_count_unique_metadata_by_filter_async`	`CountUniqueMetadataByFilterAsyncTest` — 3 tests
`test_get_metadata_fields_info_async`	`GetMetadataFieldsInfoAsyncTest` — 2 tests
`test_get_metadata_field_min_max_async`	`GetMetadataFieldMinMaxAsyncTest` — 5 tests
`test_get_metadata_field_unique_values_async`	`GetMetadataFieldUniqueValuesAsyncTest`

davidsbatista · 2026-04-22T13:55:12Z

after this one is merged we should do a new release

anakin87 · 2026-04-22T14:02:49Z

Thank you @davidsbatista!

Once comments are restored, I'll release a new major version (due to breaking changes).

anakin87

👍

SyedShahmeerAli12 requested a review from a team as a code owner April 21, 2026 18:39

SyedShahmeerAli12 requested review from anakin87 and removed request for a team April 21, 2026 18:39

github-actions Bot added integration:elasticsearch type:documentation Improvements or additions to documentation labels Apr 21, 2026

SyedShahmeerAli12 mentioned this pull request Apr 21, 2026

Use async DocumentStore mixin tests in Elasticsearch #3047

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SyedShahmeerAli12 added 4 commits April 21, 2026 23:45

fix(elasticsearch): fix E501 and override test_count_not_empty_async

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fix(elasticsearch): override delete mixin tests to match ES error beh…

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fix(elasticsearch): override duplicate fail mixin test to match ES er…

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fix(elasticsearch): override duplicate skip mixin test — ES returns 1…

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anakin87 requested changes Apr 22, 2026

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SyedShahmeerAli12 added 2 commits April 22, 2026 13:20

fix(elasticsearch): use create op for SKIP policy to enable proper sk…

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SyedShahmeerAli12 changed the title ~~refactor(elasticsearch): use async DocumentStore mixin tests~~ fix(elasticsearch): fix async write/delete behaviour and use mixin tests Apr 22, 2026

anakin87 requested changes Apr 22, 2026

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Comment thread ...ions/elasticsearch/src/haystack_integrations/document_stores/elasticsearch/document_store.py

Comment thread ...ions/elasticsearch/src/haystack_integrations/document_stores/elasticsearch/document_store.py

test(elasticsearch): restore inline comments in test_embedding_retrie…

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SyedShahmeerAli12 commented Apr 22, 2026

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test(elasticsearch): restore all removed comments and docstrings in a…

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…sync tests

Merge branch 'main' into refactor/elasticsearch-async-mixin-tests

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davidsbatista changed the title ~~fix(elasticsearch): fix async write/delete behaviour and use mixin tests~~ refactor(elasticsearch): use async mixin tests and fix write/delete behaviour Apr 22, 2026

fixin Mixin tests and write/delete docs asyn operations

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anakin87 requested changes Apr 22, 2026

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reverting try/catch on write/delete operations - aligning with other …

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…doc stores

davidsbatista approved these changes Apr 22, 2026

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anakin87 changed the title ~~refactor(elasticsearch): use async mixin tests and fix write/delete behaviour~~ refactor!: Elasticsearch - use async mixin tests and fix write/delete behaviour Apr 22, 2026

davidsbatista added 2 commits April 22, 2026 17:05

restoring some of the comments

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Merge branch 'main' into refactor/elasticsearch-async-mixin-tests

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anakin87 approved these changes Apr 22, 2026

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anakin87 merged commit 68b0141 into deepset-ai:main Apr 22, 2026
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davidsbatista commented Apr 22, 2026

Regarding the tests

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