diff --git a/cmd/admin/admin.go b/cmd/admin/admin.go
index 2cd4863a..1b341783 100644
--- a/cmd/admin/admin.go
+++ b/cmd/admin/admin.go
@@ -78,8 +78,7 @@ func Run(bootstrapPath string, addr string) error {
 		return err
 	}
 	discovery := boot.NewDiscovery(bootstrapPath)
-
-	if err := boot.Boot(context.Background(), discovery); err != nil {
+	if err = boot.Boot(context.Background(), discovery); err != nil {
 		log.Fatal("start failed: %v", err)
 		return err
 	}
diff --git a/cmd/start/start.go b/cmd/start/start.go
index c2ee4302..475ada47 100644
--- a/cmd/start/start.go
+++ b/cmd/start/start.go
@@ -102,7 +102,7 @@ func Run(bootstrapConfigPath string) {
 			return
 		}
 
-		if err := registry.DoRegistry(context.Background(), serviceRegistry, "service", listenersConf); err != nil {
+		if err = registry.DoRegistry(context.Background(), serviceRegistry, "service", listenersConf); err != nil {
 			log.Errorf("do service register failed: %v", err)
 			return
 		}
diff --git a/pkg/reduce/reduce_test.go b/pkg/reduce/reduce_test.go
new file mode 100644
index 00000000..da850c25
--- /dev/null
+++ b/pkg/reduce/reduce_test.go
@@ -0,0 +1,79 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package reduce
+
+import (
+	"testing"
+	"time"
+)
+
+import (
+	"github.com/shopspring/decimal"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestReduce(t *testing.T) {
+
+	now := time.Now()
+
+	reduces := map[Reducer][]any{
+		Min(): {int64(1), float64(1), decimal.New(1, 0), now},
+		Max(): {int64(2), float64(2), decimal.New(2, 0), now.Add(5 * time.Second)},
+		Sum(): {int64(3), float64(3), decimal.New(3, 0), nil},
+	}
+
+	for r, v := range reduces {
+		i, err := r.Int64(1, 2)
+		assert.NoError(t, err)
+		assert.Equal(t, i, v[0])
+
+		float, err := r.Float64(1, 2)
+		assert.NoError(t, err)
+		assert.Equal(t, float, v[1])
+
+		d, err := r.Decimal(decimal.New(1, 0), decimal.New(2, 0))
+		assert.NoError(t, err)
+		assert.Equal(t, d, v[2])
+
+		times, err := r.Time(now, now.Add(5*time.Second))
+		if v[3] != nil {
+			assert.NoError(t, err)
+			assert.Equal(t, times, v[3])
+		}
+	}
+
+	for r, v := range reduces {
+		i, err := r.Int64(2, 1)
+		assert.NoError(t, err)
+		assert.Equal(t, i, v[0])
+
+		float, err := r.Float64(2, 1)
+		assert.NoError(t, err)
+		assert.Equal(t, float, v[1])
+
+		d, err := r.Decimal(decimal.New(2, 0), decimal.New(1, 0))
+		assert.NoError(t, err)
+		assert.Equal(t, d, v[2])
+
+		times, err := r.Time(now.Add(5*time.Second), now)
+		if v[3] != nil {
+			assert.NoError(t, err)
+			assert.Equal(t, times, v[3])
+		}
+	}
+}