vinchent/go-by-test
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

counter: fix mutex copy issue

Browse Source
This commit is contained in:
vinchent 2024-09-21 19:47:27 +02:00
parent 572c8033f6
commit 6ded953ec6
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
counter/counter_test.go
View File

@ -5,7 +5,9 @@ import (
"testing"
)
func assertCounter(t testing.TB, got Counter, want int) {
// assertCounter
// XXX: a copy of Counter is created, but we shouldn't copy a mutex. Use pointer instead.
func assertCounter(t testing.TB, got *Counter, want int) {
t.Helper()
if got.Value() != want {
t.Errorf("got %d, want %d", got.Value(), want)
@ -20,7 +22,7 @@ func TestCounter(t *testing.T) {
counter.Inc()
counter.Inc()
assertCounter(t, counter, 3)
assertCounter(t, &counter, 3)
})
t.Run("it runs safely concurrently", func(t *testing.T) {
@ -37,6 +39,6 @@ func TestCounter(t *testing.T) {
}()
}
wg.Wait()
assertCounter(t, counter, wantedCount)
assertCounter(t, &counter, wantedCount)
})
}