test: Qdrant - add more unit tests

[anakin87]

Related Issues

• part of https://github.com/deepset-ai/haystack-private/issues/275 (previously added tests did not reach the 90% target)

Proposed Changes:

• add a few more unit tests for Qdrant, focusing on uncovered code paths

How did you test it?

CI

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.

[github-actions]

Coverage report (qdrant)

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
integrations/qdrant/src/haystack_integrations/components/retrievers/qdrant
retriever.py
integrations/qdrant/src/haystack_integrations/document_stores/qdrant
converters.py
document_store.py
Project Total

This report was generated by python-coverage-comment-action

[sjrl]

Looks good!