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-rw-r--r--src/go/pkg/ticker/ticket_test.go50
1 files changed, 50 insertions, 0 deletions
diff --git a/src/go/pkg/ticker/ticket_test.go b/src/go/pkg/ticker/ticket_test.go
new file mode 100644
index 000000000..193085365
--- /dev/null
+++ b/src/go/pkg/ticker/ticket_test.go
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package ticker
+
+import (
+ "testing"
+ "time"
+)
+
+// TODO: often fails Circle CI (~200-240)
+var allowedDelta = 500 * time.Millisecond
+
+func TestTickerParallel(t *testing.T) {
+ for i := 0; i < 100; i++ {
+ i := i
+ go func() {
+ time.Sleep(time.Second / 100 * time.Duration(i))
+ TestTicker(t)
+ }()
+ }
+ time.Sleep(4 * time.Second)
+}
+
+func TestTicker(t *testing.T) {
+ tk := New(time.Second)
+ defer tk.Stop()
+ prev := time.Now()
+ for i := 0; i < 3; i++ {
+ <-tk.C
+ now := time.Now()
+ diff := abs(now.Round(time.Second).Sub(now))
+ if diff >= allowedDelta {
+ t.Errorf("Ticker is not aligned: expect delta < %v but was: %v (%s)", allowedDelta, diff, now.Format(time.RFC3339Nano))
+ }
+ if i > 0 {
+ dt := now.Sub(prev)
+ if abs(dt-time.Second) >= allowedDelta {
+ t.Errorf("Ticker interval: expect delta < %v ns but was: %v", allowedDelta, abs(dt-time.Second))
+ }
+ }
+ prev = now
+ }
+}
+
+func abs(a time.Duration) time.Duration {
+ if a < 0 {
+ return -a
+ }
+ return a
+}