Closes the gap where app/schemas was exported but never validated (#63):
- androidx.room:room-testing (androidTest) + ship the exported schemas as
androidTest assets so MigrationTestHelper can build old-version databases.
- MigrationTest: 11->12 asserts folders.specialUse arrives defaulting to 0
with existing rows intact; a chain-integrity test requires exactly one
migration per version step up to the newest exported schema; a full
v7->latest replay validates every step against its exported JSON and
asserts seeded v7 data and each migration's backfills survive. The
migration list is discovered from Migrations.kt and the target version
from the exported schemas, so a future migration is covered by just
committing its schema JSON.
- Pin kotlinx-serialization to 1.8.1 via its BOM: androidx.savedstate pins
1.7.3 transitively (shared with androidTest by AGP 9 consistent
resolution), and Room 2.8's schema-bundle serializers need >= 1.8.0 or
MigrationTestHelper throws AbstractMethodError parsing the schema JSON.
Identical to the pin already proven on the feat-fetch-all-retention
branch, so the two merge cleanly in either order.
- Refresh comments that described migration tests as future work.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Jason Ross
JMR-devandClaude Fable 5