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testing, testing/synctest: report correct duration after panics

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Report the correct wall-clock test duration after handling a
panic in a synctest.Test bubble.

Fixes #73852

Change-Id: I053262e5eac2dd9d5938b17c3093cbc3fa115a0d
Reviewed-on: https://go-review.googlesource.com/c/go/+/676695
Auto-Submit: Damien Neil <dneil@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Damien Neil 2025-05-23 16:21:19 -07:00 • committed by Gopher Robot
parent 29782bd347
commit 8cd7f17248
2 changed files with 12 additions and 4 deletions
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10
src/testing/synctest/synctest.go
View file

@ -273,13 +273,19 @@ import (
// associated with the bubble.
// - T.Run, T.Parallel, and T.Deadline must not be called.
func Test(t *testing.T, f func(*testing.T)) {
var ok bool
synctest.Run(func() {
testingSynctestTest(t, f)
ok = testingSynctestTest(t, f)
})
if !ok {
// Fail the test outside the bubble,
// so test durations get set using real time.
t.FailNow()
}
}
//go:linkname testingSynctestTest testing/synctest.testingSynctestTest
func testingSynctestTest(t *testing.T, f func(*testing.T))
func testingSynctestTest(t *testing.T, f func(*testing.T)) bool
// Wait blocks until every goroutine within the current bubble,
// other than the current goroutine, is durably blocked.

6
src/testing/testing.go
View file

@ -1851,7 +1851,8 @@ func tRunner(t *T, fn func(t *T)) {
t.Logf("cleanup panicked with %v", r)
}
// Flush the output log up to the root before dying.
for root := &t.common; root.parent != nil; root = root.parent {
// Skip this if this *T is a synctest bubble, because we're not a subtest.
for root := &t.common; !root.isSynctest && root.parent != nil; root = root.parent {
root.mu.Lock()
root.duration += highPrecisionTimeSince(root.start)
d := root.duration
@ -2013,7 +2014,7 @@ func (t *T) Run(name string, f func(t *T)) bool {
// It is called by synctest.Test, from within an already-created bubble.
//
//go:linkname testingSynctestTest testing/synctest.testingSynctestTest
func testingSynctestTest(t *T, f func(*T)) {
func testingSynctestTest(t *T, f func(*T)) (ok bool) {
if t.cleanupStarted.Load() {
panic("testing: synctest.Run called during t.Cleanup")
}
@ -2044,6 +2045,7 @@ func testingSynctestTest(t *T, f func(*T)) {
// parent tests by one of the subtests. Continue aborting up the chain.
runtime.Goexit()
}
return !t2.failed
}
// Deadline reports the time at which the test binary will have