go.uber.org/cadence@v1.2.9/internal/common/autoscaler/recommender_test.go (about) 1 // Copyright (c) 2017-2021 Uber Technologies Inc. 2 // 3 // Permission is hereby granted, free of charge, to any person obtaining a copy 4 // of this software and associated documentation files (the "Software"), to deal 5 // in the Software without restriction, including without limitation the rights 6 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 // copies of the Software, and to permit persons to whom the Software is 8 // furnished to do so, subject to the following conditions: 9 // 10 // The above copyright notice and this permission notice shall be included in 11 // all copies or substantial portions of the Software. 12 // 13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19 // THE SOFTWARE. 20 21 package autoscaler 22 23 import "testing" 24 25 func Test_linearRecommender_Recommend(t *testing.T) { 26 type fields struct { 27 lower ResourceUnit 28 upper ResourceUnit 29 targetUsages Usages 30 } 31 type args struct { 32 currentResource ResourceUnit 33 currentUsages Usages 34 } 35 36 defaultFields := fields{ 37 lower: 5, 38 upper: 15, 39 targetUsages: map[UsageType]MilliUsage{ 40 PollerUtilizationRate: 500, 41 }, 42 } 43 44 highUpperValue := fields{ 45 lower: 5, 46 upper: 100, 47 targetUsages: map[UsageType]MilliUsage{ 48 PollerUtilizationRate: 500, 49 }, 50 } 51 52 tests := []struct { 53 name string 54 fields fields 55 args args 56 want ResourceUnit 57 }{ 58 { 59 name: "on target usage", 60 fields: defaultFields, 61 args: args{ 62 currentResource: 10, 63 currentUsages: map[UsageType]MilliUsage{ 64 PollerUtilizationRate: 500, 65 }, 66 }, 67 want: ResourceUnit(10), 68 }, 69 { 70 name: "under utilized, scale down", 71 fields: defaultFields, 72 args: args{ 73 currentResource: 10, 74 currentUsages: map[UsageType]MilliUsage{ 75 PollerUtilizationRate: 400, 76 }, 77 }, 78 want: ResourceUnit(8), 79 }, 80 { 81 name: "under utilized, scale down but bounded", 82 fields: defaultFields, 83 args: args{ 84 currentResource: 10, 85 currentUsages: map[UsageType]MilliUsage{ 86 PollerUtilizationRate: 200, 87 }, 88 }, 89 want: ResourceUnit(5), 90 }, 91 { 92 name: "zero utilization, scale down to min", 93 fields: defaultFields, 94 args: args{ 95 currentResource: 10, 96 currentUsages: map[UsageType]MilliUsage{ 97 PollerUtilizationRate: 0, 98 }, 99 }, 100 want: ResourceUnit(5), 101 }, 102 { 103 name: "over utilized, scale up", 104 fields: defaultFields, 105 args: args{ 106 currentResource: 10, 107 currentUsages: map[UsageType]MilliUsage{ 108 PollerUtilizationRate: 600, 109 }, 110 }, 111 want: ResourceUnit(12), 112 }, 113 { 114 name: "over utilized, scale up but bounded", 115 fields: defaultFields, 116 args: args{ 117 currentResource: 10, 118 currentUsages: map[UsageType]MilliUsage{ 119 PollerUtilizationRate: 1000, 120 }, 121 }, 122 want: ResourceUnit(15), 123 }, 124 { 125 name: "over utilized, since we do not how many tasks are in the queue (because poller usage at 100%), scale up to max", 126 fields: highUpperValue, 127 args: args{ 128 currentResource: 10, 129 currentUsages: map[UsageType]MilliUsage{ 130 PollerUtilizationRate: 1000, 131 }, 132 }, 133 want: ResourceUnit(100), 134 }, 135 } 136 for _, tt := range tests { 137 t.Run(tt.name, func(t *testing.T) { 138 l := NewLinearRecommender(tt.fields.lower, tt.fields.upper, tt.fields.targetUsages) 139 if got := l.Recommend(tt.args.currentResource, tt.args.currentUsages); got != tt.want { 140 t.Errorf("Recommend() = %v, want %v", got, tt.want) 141 } 142 }) 143 } 144 }