Test for #104

sample_test.go

@@ -169,6 +169,17 @@ func TestExpDecaySampleNanosecondRegression(t *testing.T) {
 	}
 }
 
+func TestExpDecaySampleRescale(t *testing.T) {
+	s := NewExpDecaySample(2, 0.001).(*ExpDecaySample)
+	s.update(time.Now(), 1)
+	s.update(time.Now().Add(time.Hour+time.Microsecond), 1)
+	for _, v := range s.values.Values() {
+		if v.k == 0.0 {
+			t.Fatal("v.k == 0.0")
+		}
+	}
+}
+
 func TestExpDecaySampleSnapshot(t *testing.T) {
 	now := time.Now()
 	rand.Seed(1)