Fix the flaky MessageMemberInfoDaoTest by generating only serializable dates - #6653
Fix the flaky MessageMemberInfoDaoTest by generating only serializable dates#6653gpunto wants to merge 1 commit into
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WalkthroughThe changes bound generated fixture dates to the maximum four-digit ISO-8601 year and add Robolectric tests for reminder date converter round trips, including randomized cases and the maximum serializable instant. ChangesDate serialization coverage
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🔵 Low · up to The PR reduces flaky date round-trips and adds converter coverage, but the shared test fixtures still need explicit boundary behavior for dates at or beyond the supported serialization range. This is a minor, localized correctness risk that is mergeable with owner awareness and follow-up. Suggested reviewers: Poem
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Inline comments:
In
`@stream-chat-android-client/src/test/java/io/getstream/chat/android/client/internal/offline/repository/database/converter/ReminderInfoConverterTest.kt`:
- Around line 51-62: Extend ReminderInfoConverterTest with deterministic
coverage for randomDateAfter: verify an input at LAST_SERIALIZABLE_DATE_MILLIS
returns the same instant, and add a separate assertion for the documented result
when the input exceeds that bound. Reuse the existing date-bound fixture and
test conventions, targeting the randomDateAfter behavior rather than only the
converter round trip.
In
`@stream-chat-android-core/src/testFixtures/kotlin/io/getstream/chat/android/Mother.kt`:
- Around line 776-786: Bound createDate’s generated Calendar result to
MAX_SERIALIZABLE_DATE_MILLIS so default year, month, and date values cannot
produce an out-of-range fixture date. Define randomDateAfter’s behavior when the
input date exceeds that limit, and add tests covering this boundary while
preserving existing safe-input behavior.
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stream-chat-android-client/src/test/java/io/getstream/chat/android/client/internal/offline/repository/database/converter/ReminderInfoConverterTest.ktstream-chat-android-core/src/testFixtures/kotlin/io/getstream/chat/android/Mother.kt
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Goal
MessageMemberInfoDaoTestis flaky: the same commit goes red and then green on rerun, failing withThe cause is in the fixtures.
randomDate()wasDate(positiveRandomLong()), so dates ran up to year292278994, while our ISO-8601 writer emits a four digit year on API 26+ and silently truncates the rest:
year 292278994 is written as
2922. Almost every fixture date was past year 9999, so almost every datepersisted through a JSON-backed Room converter came back as a different date, which is invisible to a test
that does not assert on it.
It becomes a failure when the truncation lands on a February 29th whose four digit year is not a leap year,
for example
+30000-02-29written as3000-02-29. That string is not a real instant,IsoDateAdapterreturns null for it, and Moshi throws on the non-null
ReminderInfoEntity.updatedAt.randomMessagedefaults
reminderto arandomMessageReminderInfo()holding two non-null dates, so every test in thatclass was exposed, as is anything else that round-trips a fixture date through these converters.
Closes AND-1438
Implementation
randomDate()andrandomDateAfter()to the last instant we can serialise,9999-12-31T23:59:59.999Z. Pinningreminder = nullin the failing tests would have fixed the one testand left every other fixture date silently corrupting through this path.
ReminderInfoConverterTest, where the crash surfaced and which had no coverage before.Left alone, and worth a separate ticket:
IsoDateAdapter.fromJsoncatches everyThrowableand returnsnull. That leniency is right for wire data, but on the database path it turns a date we wrote ourselves into
a read-time crash on a non-null column, and into a wrong date on a nullable one.
Testing
Date(884546442123004)is+30000-02-29T01:02:03.004Z. Put on a message reminderand read back through
MessageDao.select, it throws the exception above ondevelop.3,000 round trips before, 0 in 20,000 after.
ReminderInfoConverterTestfails without the fixture change, on its first iteration, on the silentcorruption case:
remindAt=... 275752190came back as... 2757. Its 5,000 draws also make the rarercrash case very likely to be caught if the fixture regresses, and a second case pins the year 9999
boundary deterministically.
./gradlew :stream-chat-android-client:testDebugUnitTest spotlessCheck detekt apiCheckgreen on thecommitted tree, rebased on current
develop.:stream-chat-android-core:test,:stream-chat-android-ui-common,:stream-chat-android-ui-componentsand:stream-chat-android-compose:testDebugUnitTest.Summary by CodeRabbit