1 files changed, 29 insertions, 0 deletions
diff --git a/src/pkg/time/tick_test.go b/src/pkg/time/tick_test.go
new file mode 100644
index 000000000..0667be679
--- /dev/null
+++ b/src/pkg/time/tick_test.go
@@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package time
+
+import (
+	"testing";
+	"time";
+)
+
+func TestTick(t *testing.T) {
+	const (
+		Delta = 100*1e6;
+		Count = 10;
+	);
+	c := Tick(Delta);
+	t0 := Nanoseconds();
+	for i := 0; i < Count; i++ {
+		<-c;
+	}
+	t1 := Nanoseconds();
+	ns := t1 - t0;
+	target := int64(Delta*Count);
+	slop := target*2/10;
+	if ns < target - slop || ns > target + slop {
+		t.Fatalf("%d ticks of %g ns took %g ns, expected %g", Count, float64(Delta), float64(ns), float64(target));
+	}
+}