test(alerting): improve naming for test scenario

pkg/services/alerting/conditions/reducer_test.go

@@ -11,25 +11,6 @@ import (
 
 func TestSimpleReducer(t *testing.T) {
 	Convey("Test simple reducer by calculating", t, func() {
-		Convey("avg", func() {
-			result := testReducer("avg", 1, 2, 3)
-			So(result, ShouldEqual, float64(2))
-		})
-
-		Convey("avg of none null data", func() {
-			reducer := NewSimpleReducer("avg")
-			series := &tsdb.TimeSeries{
-				Name: "test time serie",
-			}
-
-			series.Points = append(series.Points, tsdb.NewTimePoint(null.FloatFrom(3), 1))
-			series.Points = append(series.Points, tsdb.NewTimePoint(null.FloatFromPtr(nil), 2))
-			series.Points = append(series.Points, tsdb.NewTimePoint(null.FloatFromPtr(nil), 3))
-			series.Points = append(series.Points, tsdb.NewTimePoint(null.FloatFrom(3), 4))
-
-			So(reducer.Reduce(series).Float64, ShouldEqual, float64(3))
-		})
-
 		Convey("sum", func() {
 			result := testReducer("sum", 1, 2, 3)
 			So(result, ShouldEqual, float64(6))
@@ -69,6 +50,25 @@ func TestSimpleReducer(t *testing.T) {
 			result := testReducer("median", 1)
 			So(result, ShouldEqual, float64(1))
 		})
+
+		Convey("avg", func() {
+			result := testReducer("avg", 1, 2, 3)
+			So(result, ShouldEqual, float64(2))
+		})
+
+		Convey("avg of number values and null values should ignore nulls", func() {
+			reducer := NewSimpleReducer("avg")
+			series := &tsdb.TimeSeries{
+				Name: "test time serie",
+			}
+
+			series.Points = append(series.Points, tsdb.NewTimePoint(null.FloatFrom(3), 1))
+			series.Points = append(series.Points, tsdb.NewTimePoint(null.FloatFromPtr(nil), 2))
+			series.Points = append(series.Points, tsdb.NewTimePoint(null.FloatFromPtr(nil), 3))
+			series.Points = append(series.Points, tsdb.NewTimePoint(null.FloatFrom(3), 4))
+
+			So(reducer.Reduce(series).Float64, ShouldEqual, float64(3))
+		})
 	})
 }