istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pilot/test/xdstest/endpoints.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package xdstest
    16  
    17  import (
    18  	"fmt"
    19  	"sort"
    20  	"testing"
    21  
    22  	endpointv3 "github.com/envoyproxy/go-control-plane/envoy/config/endpoint/v3"
    23  )
    24  
    25  type LbEpInfo struct {
    26  	Address string
    27  	// nolint: structcheck
    28  	Weight uint32
    29  }
    30  
    31  type LocLbEpInfo struct {
    32  	LbEps  []LbEpInfo
    33  	Weight uint32
    34  }
    35  
    36  func (i LocLbEpInfo) GetAddrs() []string {
    37  	addrs := make([]string, 0)
    38  	for _, ep := range i.LbEps {
    39  		addrs = append(addrs, ep.Address)
    40  	}
    41  	return addrs
    42  }
    43  
    44  func CompareEndpointsOrFail(t *testing.T, cluster string, got []*endpointv3.LocalityLbEndpoints, want []LocLbEpInfo) {
    45  	if err := CompareEndpoints(cluster, got, want); err != nil {
    46  		t.Error(err)
    47  	}
    48  }
    49  
    50  func CompareEndpoints(cluster string, got []*endpointv3.LocalityLbEndpoints, want []LocLbEpInfo) error {
    51  	if len(got) != len(want) {
    52  		return fmt.Errorf("unexpected number of filtered endpoints for %s: got %v, want %v", cluster, len(got), len(want))
    53  	}
    54  
    55  	sort.Slice(got, func(i, j int) bool {
    56  		addrI := got[i].LbEndpoints[0].GetEndpoint().Address.GetSocketAddress().Address
    57  		addrJ := got[j].LbEndpoints[0].GetEndpoint().Address.GetSocketAddress().Address
    58  		return addrI < addrJ
    59  	})
    60  
    61  	for i, ep := range got {
    62  		if len(ep.LbEndpoints) != len(want[i].LbEps) {
    63  			return fmt.Errorf("unexpected number of LB endpoints within endpoint %d: %v, want %v",
    64  				i, getLbEndpointAddrs(ep), want[i].GetAddrs())
    65  		}
    66  
    67  		if ep.LoadBalancingWeight.GetValue() != want[i].Weight {
    68  			return fmt.Errorf("unexpected weight for endpoint %d: got %v, want %v", i, ep.LoadBalancingWeight.GetValue(), want[i].Weight)
    69  		}
    70  
    71  		for _, lbEp := range ep.LbEndpoints {
    72  			addr := lbEp.GetEndpoint().Address.GetSocketAddress().Address
    73  			found := false
    74  			for _, wantLbEp := range want[i].LbEps {
    75  				if addr == wantLbEp.Address {
    76  					found = true
    77  
    78  					// Now compare the weight.
    79  					if lbEp.GetLoadBalancingWeight().Value != wantLbEp.Weight {
    80  						return fmt.Errorf("unexpected weight for endpoint %s: got %v, want %v",
    81  							addr, lbEp.GetLoadBalancingWeight().Value, wantLbEp.Weight)
    82  					}
    83  					break
    84  				}
    85  			}
    86  			if !found {
    87  				return fmt.Errorf("unexpected address for endpoint %d: %v", i, addr)
    88  			}
    89  		}
    90  	}
    91  	return nil
    92  }
    93  
    94  func getLbEndpointAddrs(ep *endpointv3.LocalityLbEndpoints) []string {
    95  	addrs := make([]string, 0)
    96  	for _, lbEp := range ep.LbEndpoints {
    97  		addrs = append(addrs, lbEp.GetEndpoint().Address.GetSocketAddress().Address)
    98  	}
    99  	return addrs
   100  }