IndexedDB: initialize StoreCipher in encrypted store tests

[mgoldenberg]

Background

This pull request is part of a series of pull requests to add a full IndexedDB implementation of the EventCacheStore and MediaStore (see #4617, #4996, #5090, #5138, #5226, #5274, #5343, #5384, #5406, #5414, #5497, #5506, #5540, #5574, #5603, #5676, #5682, #5749, #5795). This particular pull request fixes a number of bugs related to encrypted stores and their tests.

The primary issue is that the encrypted tests were being run without a StoreCipher for both the EventCacheStore and the MediaStore. Furthermore, once the StoreCipher is initialized for these tests, some of the EventCacheStore tests were failing.

Changes

Initialize StoreCipher in encrypted tests

This is pretty simple, just add a StoreCipher to event_cache_store::tests::encrypted::get_event_cache_store and media_store::tests::encrypted::get_media_store.

Fix failing tests in EventCacheStore

A number of tests began to fail when introducing encryption to the EventCacheStore.

• event_cache_store_integration_tests::test_get_room_events
• event_cache_store_integration_tests::test_get_room_events_filtered
• event_cache_store_integration_tests::test_remove_room

These tests failed because the constants representing the uppermost and lowermost possible bounds of an EventId were being encrypted when constructing a query for all events in a room. Once encrypted, these constants no longer represented the uppermost and lowermost possible bounds of an EventId.

The solution is to not encrypt these constant values, as they lose their purpose once encrypted.

Future Work

• Expose EventCacheStore and MediaStore outside of the matrix-sdk-indexeddb

---

• Public API changes documented in changelogs (optional)

Signed-off-by: Michael Goldenberg m@mgoldenberg.net

[codspeed-hq]

CodSpeed Performance Report

Merging #5933 will not alter performance

_{Comparing mgoldenberg:indexeddb-event-cache-and-media-store-encrypted-tests (fd0f854) with main (238e4e8)}

Summary

✅ 50 untouched

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.49%. Comparing base (238e4e8) to head (fd0f854).
⚠️ Report is 8 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5933      +/-   ##
==========================================
- Coverage   88.50%   88.49%   -0.01%     
==========================================
  Files         362      362              
  Lines      103291   103291              
  Branches   103291   103291              
==========================================
- Hits        91413    91405       -8     
- Misses       7535     7544       +9     
+ Partials     4343     4342       -1     

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[Hywan]

Thanks! Look super great!