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dbx/docs/testing/redis-value-preview-11326.md
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zipg d51926a7e3 feat(redis): configure value preview limit (#12089)
* feat(redis): configure value preview limit

* docs(testing): record Redis preview limit verification

* refactor(redis): move preview limit to connection advanced settings

* docs(testing): update Redis advanced setting screenshot

* refactor(redis): place preview limit at bottom of advanced settings
2026-10-15 16:43:57 +08:00

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Configurable Redis value preview limit (#11326)

Verified on macOS 26.3 with the local DBX Web build on 2026-10-14.

The new setting is at the bottom of Redis connection → Advanced settings. It is stored globally and applies to every Redis connection. It defaults to 64 KiB and accepts 1–65536 KiB. The selected value is passed to the Redis String/Bitmap preview request; complete downloads still use the raw-value endpoint.

Redis preview setting set to 256 KiB

Manual Web verification

A local Redis 7.4.9 server was seeded with these values:

  • a 101,084 byte JSON document containing 850 items and a final END-11326 marker;
  • a 131,072 byte binary value containing every byte from 0 through 255 repeatedly;
  • a 5 byte value;
  • a 65,536 byte boundary value.

With the default 64 KiB setting, the 101,084 byte JSON appeared as a read-only preview with the message that only 64 KiB was loaded. After changing the setting to 256 KiB and applying it, the open detail automatically refreshed: the full JSON became editable, the truncation notice disappeared, and the final items and END-11326 marker were visible. Reloading the Web app preserved 256 KiB and opening the same key again kept the full editable value.

Full value after reload with 256 KiB persisted

Automated verification

  • 187 dbx-driver-redis unit tests passed.
  • The ignored integration test against the local Redis server passed for text, UTF-8 Chinese content, and binary data: 64 KiB truncation, 256 KiB complete reads, exact-boundary reads, and complete raw downloads all preserved bytes.
  • 470 frontend tests passed across 23 focused suites, including Redis viewer behavior, settings apply and reset, settings transfer validation, and HTTP/Tauri argument forwarding.
  • Frontend formatting, lint, typecheck, and the Web backend build passed.
  • Invalid preview sizes below 1 KiB and above 64 MiB were rejected before Redis I/O.