Improve diskann-disk test coverage#1193
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Add 18 targeted unit tests covering previously untested error paths, control flow branches, and pure functions across 7 files. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #1193 +/- ##
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+ Coverage 90.08% 90.15% +0.07%
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Files 487 487
Lines 92325 92613 +288
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+ Hits 83167 83492 +325
+ Misses 9158 9121 -37
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Pull request overview
This PR increases unit test coverage in the diskann-disk crate by adding targeted tests for previously untested branches and error paths across utilities, PQ scratch handling, sector graph reconfiguration, quantization generator validation, continuation helpers, and checkpoint record management.
Changes:
- Add unit tests for partition-count estimation edge cases (clamping, odd rounding, k_base multiplier).
- Add tests covering error-path and basic-success behavior in k-means clustering, PQScratch query validation, quant generator parameter validation, sector graph reconfiguration/defaulting, continuation processing behavior, and checkpoint invalidation.
Reviewed changes
Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.
Show a summary per file
| File | Description |
|---|---|
| diskann-disk/src/utils/partition.rs | Adds tests for estimate_initial_partition_count edge cases. |
| diskann-disk/src/utils/kmeans.rs | Adds tests for successful clustering output shape and cancellation error path. |
| diskann-disk/src/storage/quant/generator.rs | Adds test for missing compressed-file validation when resuming with offset. |
| diskann-disk/src/search/provider/disk_sector_graph.rs | Adds tests for reconfigure growth/no-op and block-size defaulting. |
| diskann-disk/src/search/pq/pq_scratch.rs | Adds tests for rejecting undersized queries and accepting oversized queries. |
| diskann-disk/src/build/chunking/continuation/utils.rs | Adds tests for early stop, yield-then-continue, and error propagation (sync/async). |
| diskann-disk/src/build/chunking/checkpoint/checkpoint_record_manager_with_file.rs | Adds tests for fresh-state behavior, missing-file completion state, and invalidation semantics. |
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| // Query shorter than dim should fail | ||
| let short_query: Vec<f32> = (1..dim).map(|i| i as f32).collect(); // dim-1 elements | ||
| let err = pq_scratch.set(&short_query).unwrap_err(); | ||
| assert!(err.to_string().contains("expected query of length")); | ||
| } |
| let err = generator.validate_params(num_points, &storage_provider); | ||
| assert!(err.is_err()); | ||
| let err_msg = format!("{:?}", err.unwrap_err()); | ||
| assert!(err_msg.contains("expected compressed file")); | ||
|
|
| if !*yielded { | ||
| *yielded = true; | ||
| ContinuationGrant::Yield(std::time::Duration::from_millis(1)) | ||
| } else { |
Adds 18 targeted unit tests to the
diskann-diskcrate covering previouslyuntested error paths, control flow branches, and pure functions.