dubbo.apache.org/dubbo-go/v3@v3.1.1/cluster/loadbalance/interleavedweightedroundrobin/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 iwrr
    19  
    20  import (
    21  	"fmt"
    22  	"testing"
    23  
    24  	"dubbo.apache.org/dubbo-go/v3/common"
    25  	"dubbo.apache.org/dubbo-go/v3/common/constant"
    26  	"dubbo.apache.org/dubbo-go/v3/protocol"
    27  	"dubbo.apache.org/dubbo-go/v3/protocol/invocation"
    28  	"github.com/stretchr/testify/assert"
    29  )
    30  
    31  func TestIWrrRoundRobinSelect(t *testing.T) {
    32  	loadBalance := newInterleavedWeightedRoundRobinBalance()
    33  
    34  	var invokers []protocol.Invoker
    35  
    36  	url, _ := common.NewURL(fmt.Sprintf("dubbo://%s:%d/org.apache.demo.HelloService",
    37  		constant.LocalHostValue, constant.DefaultPort))
    38  	invokers = append(invokers, protocol.NewBaseInvoker(url))
    39  	i := loadBalance.Select(invokers, &invocation.RPCInvocation{})
    40  	assert.True(t, i.GetURL().URLEqual(url))
    41  
    42  	for i := 1; i < 10; i++ {
    43  		url, _ := common.NewURL(fmt.Sprintf("dubbo://192.168.1.%v:20000/org.apache.demo.HelloService", i))
    44  		invokers = append(invokers, protocol.NewBaseInvoker(url))
    45  	}
    46  	loadBalance.Select(invokers, &invocation.RPCInvocation{})
    47  }
    48  
    49  func TestIWrrRoundRobinByWeight(t *testing.T) {
    50  	loadBalance := newInterleavedWeightedRoundRobinBalance()
    51  
    52  	var invokers []protocol.Invoker
    53  	loop := 10
    54  	for i := 1; i <= loop; i++ {
    55  		url, _ := common.NewURL(fmt.Sprintf("dubbo://192.168.1.%v:20000/org.apache.demo.HelloService?weight=%v", i, i))
    56  		invokers = append(invokers, protocol.NewBaseInvoker(url))
    57  	}
    58  
    59  	loop = (1 + loop) * loop / 2
    60  	selected := make(map[protocol.Invoker]int)
    61  
    62  	for i := 1; i <= loop; i++ {
    63  		invoker := loadBalance.Select(invokers, &invocation.RPCInvocation{})
    64  		selected[invoker]++
    65  	}
    66  
    67  	sum := 0
    68  	for _, value := range selected {
    69  		sum += value
    70  	}
    71  
    72  	assert.Equal(t, loop, sum)
    73  }