TestService_WithDrops and TestService_SubmitVerificationWithDrops
submitted three items into a size-1 queue and asserted at least one was
dropped, relying on the single consumer not draining the queue between
submits. synctest does not fully pin this because the MockDest send path
does real logging I/O outside the bubble, so under CI's -race scheduling
the consumer occasionally drained all three, delivering everything and
failing the "<= 2" assertion (~0.2% of CI runs).
Add an optional gate channel to MockDest so a destination blocks in
Send/SendVerification until released. The tests now submit one item (the
consumer picks it up and blocks on the gate), fill the size-1 queue,
submit an overflow item that is dropped, then release the gate — the
drop is deterministic regardless of scheduling. Assert exactly two
delivered instead of "at most two".
Go 1.25's testing/synctest package (GA) provides a fake clock bubble
for deterministic goroutine and timer testing. Convert tests that
waited on real-time durations to use synctest, removing most wall-clock
time.Sleep workarounds.
Converted (11 tests, 9 files):
- notify/notify_test.go — all tests, replaced 17 time.Sleep(110ms) with synctest.Wait()
- store/service/service_test.go — VoteSameIPWithDuration, UserReplies, submitImages,
ResubmitStagingImages, deleteImagesOnCommentDelete
- store/image/{image,bolt_store}_test.go — Cleanup, Submit, SubmitDelay
- store/engine/bolt_test.go — FlagListBlocked
- providers/telegram_test.go — DispatchTelegramUpdates
- migrator/backup_test.go — TestBackup_Do
- _example/memory_store/accessor/data_test.go — FlagListBlocked
Simplifications along the way:
- notify/notify_mock.go: dropped the 10ms time.After delay and
ctx.Done select in MockDest — the artificial I/O simulation is
pointless and blocked synctest.Wait from draining the queue
- Removed three dead-code time.Sleep(1s) calls in EditCommentDurationFailed,
EditCommentAdmin, and Info tests: prepopulated comments from 2017
already exceed any EditDuration/ReadOnlyAge under real clock, making
the sleeps meaningless
- UserReplies: replaced the Eventually+Sleep+mutex polling with a
direct time.Sleep under fake clock
Skipped (incompatible with synctest):
- fs_store_test.go: relies on OS file mtime (real wall clock)
- rss_test.go: needs real wall-clock second boundary for pubDate
- admin/rest_private/rest_public tests: httptest network I/O
- cmd/server_test.go: real HTTP server startup polling
Notes on quirks encountered:
- synctest.Wait() does NOT advance fake time, contrary to what one
might expect. It only returns once all other bubble goroutines are
durably blocked. To advance the fake clock, the test goroutine must
itself call time.Sleep
- BoltDB keys the "last" bucket by comment.Timestamp nanosecond string.
Rapid b.Create calls under frozen fake time produce identical keys
and overwrite each other. TestService_UserReplies adds
time.Sleep(time.Nanosecond) between Creates to advance the clock
- Bolt image Cleanup uses strict age > ttl. Under fake time the
age-ttl delta is exactly zero at the boundary, so subtract 1ms from
the passed ttl to stay strictly under
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: umputun <535880+umputun@users.noreply.github.com>
* migrate golangci-lint to v2 and update go version
- migrated .golangci.yml to version 2 format
- updated go.mod from 1.23.0 to 1.24
- removed deprecated run.timeout configuration
* update to go 1.25 and baseimage v1.17.0
- updated go.mod to go 1.25
- updated Dockerfile to use buildgo-v1.17.0 (go 1.25.0)
- updated Dockerfile to use app-v1.17.0
* fix flaky tests with proper synchronization
- use assert.Eventually instead of fixed sleep in TestService_Many
- wait for webhook before shutdown in TestMain_WithWebhook
- fixes race conditions exposed by Go 1.25 scheduler changes
* fix data race in MockDest.closed field
- add IsClosed() method with proper locking
- add locking to String() method
- use IsClosed() in tests instead of direct field access
- fixes race condition detected by go test -race
* update example go.mod to go 1.25
* update golangci-lint to v2.6.0 for go 1.25 support
* fix linter issue and update CLAUDE.md
- merge conditional assignment in example accessor/data.go
- add reminder in CLAUDE.md to always test and lint examples before committing
* update example Dockerfile to baseimage v1.17.0 for go 1.25
* add API methods for setting and deleting email
* fix service.SetStringUserDetail signature to return string
* switch table test with description to t.Run()
* remove debug logging
* clarify error handling, functions names
* add email integration test
* add information about email subscription to readme
* change email API calls method from PUT to POST
* typo fix, remove unneeded capturing of range variable
* email test draft
* fix notify mock, email notification test draft
* add MockDestination to startupT return
* fix tests
* add email retrieval for notifications sending
* fix mock for notify
* rearrange mock notify declaration
* add GET /email API handler, fix typos
* revert startupT signature change
* get rid of startupTWithDest workaround
* add rest examples for rest notification
* improve email messages formatting
* fix email send repeater location
* remove unneeded context from sendMessage
* change signatures of buildMessage functions to have same field name
* add missing authenticate call on TLS connection
* add dev user auth token to email requests
* change email verification template
* email code and tests cleanup
* replace fixed spaces with normal ones
* human-readable variables names for new comment reply notification
* rename Comment to CommentText
* add html for comment email notification
* fix comment notification html style
* fix email test
* fix notify email messages rendering
* fix comments on rest examples for email
* explicitly state email notify email template fields
* clarify email API documentation
* change email test not to check quoted-printable part of message
* Fix link color, add unsubscribe link
* fix rest examples tokens
* add UnsubscribeLink support to Email
* add unsubscribe email handler
* fix new reply notification email style
Dmitry VerkhoturovandUmputun
