fix document index test

[JohnJyong]

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Summary

Screenshots

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Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

[gemini-code-assist]

Summary of Changes

Hello @JohnJyong, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request resolves an issue within a document indexing integration test. It adjusts the test's initial conditions by modifying a document segment's enabled status and updates the expected count of processed segments, ensuring the test accurately validates the segment filtering logic and passes reliably.

Highlights

• Test Fix: Corrected the test_add_document_to_index_segment_filtering_edge_cases test to ensure accurate validation of document indexing behavior.
• Segment Status Adjustment: Modified a DocumentSegment's enabled status from True to False within the test setup, aligning it with the intended test scenario.
• Assertion Update: Updated the expected number of processed segments in the test assertion from 2 to 3, reflecting the correct outcome for the filtering logic.

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[gemini-code-assist]

Code Review

This pull request aims to fix a test for document indexing. While it correctly adjusts the number of expected segments to be processed, it unfortunately introduces a new bug by not updating the subsequent assertions, which will now fail. Additionally, a comment related to the test setup has become outdated due to the changes. I've provided comments to address both the critical test failure and the minor maintainability issue.