1 files changed, 19 insertions, 0 deletions
diff --git a/weed/stats/duration_counter_test.go b/weed/stats/duration_counter_test.go
new file mode 100644
index 000000000..aa9d61c87
--- /dev/null
+++ b/weed/stats/duration_counter_test.go
@@ -0,0 +1,19 @@
+package stats
+
+import "testing"
+
+func TestRobinCounter(t *testing.T) {
+	rrc := NewRoundRobinCounter(60)
+	rrc.Add(0, 1)
+	rrc.Add(50, 2)
+	if rrc.Count() != 2 {
+		t.Fatal()
+	}
+	if rrc.Sum() != 3 {
+		t.Fatal()
+	}
+	/*
+		index out of range
+	*/
+	rrc.Add(61, 1)
+}