dubbo.apache.org/dubbo-go/v3@v3.1.1/cluster/loadbalance/roundrobin/loadbalance_test.go (about)

     1  /*
     2   * Licensed to the Apache Software Foundation (ASF) under one or more
     3   * contributor license agreements.  See the NOTICE file distributed with
     4   * this work for additional information regarding copyright ownership.
     5   * The ASF licenses this file to You under the Apache License, Version 2.0
     6   * (the "License"); you may not use this file except in compliance with
     7   * the License.  You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  package roundrobin
    19  
    20  import (
    21  	"fmt"
    22  	"strconv"
    23  	"testing"
    24  )
    25  
    26  import (
    27  	"github.com/stretchr/testify/assert"
    28  )
    29  
    30  import (
    31  	"dubbo.apache.org/dubbo-go/v3/common"
    32  	"dubbo.apache.org/dubbo-go/v3/common/constant"
    33  	"dubbo.apache.org/dubbo-go/v3/protocol"
    34  	"dubbo.apache.org/dubbo-go/v3/protocol/invocation"
    35  )
    36  
    37  func TestRoundRobinSelect(t *testing.T) {
    38  	loadBalance := NewRRLoadBalance()
    39  
    40  	var invokers []protocol.Invoker
    41  
    42  	url, _ := common.NewURL(fmt.Sprintf("dubbo://%s:%d/org.apache.demo.HelloService",
    43  		constant.LocalHostValue, constant.DefaultPort))
    44  	invokers = append(invokers, protocol.NewBaseInvoker(url))
    45  	i := loadBalance.Select(invokers, &invocation.RPCInvocation{})
    46  	assert.True(t, i.GetURL().URLEqual(url))
    47  
    48  	for i := 1; i < 10; i++ {
    49  		url, _ := common.NewURL(fmt.Sprintf("dubbo://192.168.1.%v:20000/org.apache.demo.HelloService", i))
    50  		invokers = append(invokers, protocol.NewBaseInvoker(url))
    51  	}
    52  	loadBalance.Select(invokers, &invocation.RPCInvocation{})
    53  }
    54  
    55  func TestRoundRobinByWeight(t *testing.T) {
    56  	loadBalance := NewRRLoadBalance()
    57  
    58  	var invokers []protocol.Invoker
    59  	loop := 10
    60  	for i := 1; i <= loop; i++ {
    61  		url, _ := common.NewURL(fmt.Sprintf("dubbo://192.168.1.%v:20000/org.apache.demo.HelloService?weight=%v", i, i))
    62  		invokers = append(invokers, protocol.NewBaseInvoker(url))
    63  	}
    64  
    65  	loop = (1 + loop) * loop / 2
    66  	selected := make(map[protocol.Invoker]int)
    67  
    68  	for i := 1; i <= loop; i++ {
    69  		invoker := loadBalance.Select(invokers, &invocation.RPCInvocation{})
    70  		selected[invoker]++
    71  	}
    72  
    73  	for _, i := range invokers {
    74  		w, _ := strconv.Atoi(i.GetURL().GetParam("weight", "-1"))
    75  		assert.True(t, selected[i] == w)
    76  	}
    77  }