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| 1 | +using Lucca.Infra.Haproxy.AgentCheck.Config; |
| 2 | +using Lucca.Infra.Haproxy.AgentCheck.Metrics; |
| 3 | +using Microsoft.Extensions.DependencyInjection; |
| 4 | +using Microsoft.Extensions.Logging; |
| 5 | +using Xunit; |
| 6 | +using Xunit.Abstractions; |
| 7 | + |
| 8 | +namespace Lucca.Infra.Haproxy.AgentCheck.Tests; |
| 9 | + |
| 10 | +public class CountersStateTests(ITestOutputHelper testOutputHelper) |
| 11 | +{ |
| 12 | + [Fact] |
| 13 | + public void UpdateState_WithCounterValue_UpdatesWeight() |
| 14 | + { |
| 15 | + var serviceProvider = CreateServiceProvider( |
| 16 | + new RuleConfig |
| 17 | + { |
| 18 | + Name = "custom-counter", |
| 19 | + Source = RuleSource.Counters, |
| 20 | + Weight = new WeightRule |
| 21 | + { |
| 22 | + SystemResponse = SystemResponse.Linear, |
| 23 | + MinValue = 0, |
| 24 | + MaxValue = 100, |
| 25 | + MinWeight = 0, |
| 26 | + MaxWeight = 100 |
| 27 | + } |
| 28 | + }); |
| 29 | + |
| 30 | + var sut = serviceProvider.GetRequiredService<State>(); |
| 31 | + sut.UpdateState(new CountersState |
| 32 | + { |
| 33 | + Values = new Dictionary<string, double> { ["custom-counter"] = 50 } |
| 34 | + }); |
| 35 | + |
| 36 | + Assert.True(sut.IsUp); |
| 37 | + Assert.Equal(50, sut.Weight, 0.01); |
| 38 | + } |
| 39 | + |
| 40 | + [Fact] |
| 41 | + public void UpdateState_WithCounterAboveThreshold_BreaksCircuit() |
| 42 | + { |
| 43 | + var serviceProvider = CreateServiceProvider( |
| 44 | + new RuleConfig |
| 45 | + { |
| 46 | + Name = "error-rate", |
| 47 | + Source = RuleSource.Counters, |
| 48 | + Failure = new FailureRule |
| 49 | + { |
| 50 | + EnterThreshold = 10, |
| 51 | + LeaveThreshold = 5 |
| 52 | + } |
| 53 | + }); |
| 54 | + |
| 55 | + var sut = serviceProvider.GetRequiredService<State>(); |
| 56 | + sut.UpdateState(new CountersState |
| 57 | + { |
| 58 | + Values = new Dictionary<string, double> { ["error-rate"] = 15 } |
| 59 | + }); |
| 60 | + |
| 61 | + Assert.False(sut.IsUp); |
| 62 | + Assert.Contains("Counters/error-rate", sut.BrokenCircuitsBreakers); |
| 63 | + } |
| 64 | + |
| 65 | + [Fact] |
| 66 | + public void UpdateState_WhenCounterRemoved_RemovesBrokenCircuit() |
| 67 | + { |
| 68 | + var serviceProvider = CreateServiceProvider( |
| 69 | + new RuleConfig |
| 70 | + { |
| 71 | + Name = "temp-counter", |
| 72 | + Source = RuleSource.Counters, |
| 73 | + Failure = new FailureRule |
| 74 | + { |
| 75 | + EnterThreshold = 10, |
| 76 | + LeaveThreshold = 5 |
| 77 | + } |
| 78 | + }); |
| 79 | + |
| 80 | + var sut = serviceProvider.GetRequiredService<State>(); |
| 81 | + |
| 82 | + // First update with counter above threshold |
| 83 | + sut.UpdateState(new CountersState |
| 84 | + { |
| 85 | + Values = new Dictionary<string, double> { ["temp-counter"] = 15 } |
| 86 | + }); |
| 87 | + Assert.Contains("Counters/temp-counter", sut.BrokenCircuitsBreakers); |
| 88 | + |
| 89 | + // Second update without the counter |
| 90 | + sut.UpdateState(new CountersState |
| 91 | + { |
| 92 | + Values = new Dictionary<string, double>() |
| 93 | + }); |
| 94 | + |
| 95 | + Assert.DoesNotContain("Counters/temp-counter", sut.BrokenCircuitsBreakers); |
| 96 | + } |
| 97 | + |
| 98 | + [Fact] |
| 99 | + public void UpdateState_WithMultipleCounters_UsesLowestWeight() |
| 100 | + { |
| 101 | + var serviceProvider = CreateServiceProvider( |
| 102 | + new RuleConfig |
| 103 | + { |
| 104 | + Name = "counter1", |
| 105 | + Source = RuleSource.Counters, |
| 106 | + Weight = new WeightRule |
| 107 | + { |
| 108 | + SystemResponse = SystemResponse.Linear, |
| 109 | + MinValue = 0, |
| 110 | + MaxValue = 100, |
| 111 | + MinWeight = 0, |
| 112 | + MaxWeight = 100 |
| 113 | + } |
| 114 | + }, |
| 115 | + new RuleConfig |
| 116 | + { |
| 117 | + Name = "counter2", |
| 118 | + Source = RuleSource.Counters, |
| 119 | + Weight = new WeightRule |
| 120 | + { |
| 121 | + SystemResponse = SystemResponse.Linear, |
| 122 | + MinValue = 0, |
| 123 | + MaxValue = 100, |
| 124 | + MinWeight = 0, |
| 125 | + MaxWeight = 100 |
| 126 | + } |
| 127 | + }); |
| 128 | + |
| 129 | + var sut = serviceProvider.GetRequiredService<State>(); |
| 130 | + sut.UpdateState(new CountersState |
| 131 | + { |
| 132 | + Values = new Dictionary<string, double> |
| 133 | + { |
| 134 | + ["counter1"] = 20, // Weight would be 80 |
| 135 | + ["counter2"] = 90 // Weight would be 10 |
| 136 | + } |
| 137 | + }); |
| 138 | + |
| 139 | + Assert.True(sut.IsUp); |
| 140 | + Assert.Equal(10, sut.Weight, 0.01); |
| 141 | + } |
| 142 | + |
| 143 | + [Fact] |
| 144 | + public void UpdateState_CombineSystemAndCounters_UsesLowestWeight() |
| 145 | + { |
| 146 | + var serviceProvider = CreateServiceProvider( |
| 147 | + new RuleConfig |
| 148 | + { |
| 149 | + Name = "CPU", |
| 150 | + Source = RuleSource.System, |
| 151 | + Weight = new WeightRule |
| 152 | + { |
| 153 | + SystemResponse = SystemResponse.Linear, |
| 154 | + MinValue = 0, |
| 155 | + MaxValue = 100, |
| 156 | + MinWeight = 0, |
| 157 | + MaxWeight = 100 |
| 158 | + } |
| 159 | + }, |
| 160 | + new RuleConfig |
| 161 | + { |
| 162 | + Name = "custom-metric", |
| 163 | + Source = RuleSource.Counters, |
| 164 | + Weight = new WeightRule |
| 165 | + { |
| 166 | + SystemResponse = SystemResponse.Linear, |
| 167 | + MinValue = 0, |
| 168 | + MaxValue = 100, |
| 169 | + MinWeight = 0, |
| 170 | + MaxWeight = 100 |
| 171 | + } |
| 172 | + }); |
| 173 | + |
| 174 | + var sut = serviceProvider.GetRequiredService<State>(); |
| 175 | + |
| 176 | + // CPU at 30% -> weight 70 |
| 177 | + sut.UpdateState(new SystemState { CpuPercent = 30 }); |
| 178 | + |
| 179 | + // Custom metric at 80 -> weight 20 |
| 180 | + sut.UpdateState(new CountersState |
| 181 | + { |
| 182 | + Values = new Dictionary<string, double> { ["custom-metric"] = 80 } |
| 183 | + }); |
| 184 | + |
| 185 | + Assert.True(sut.IsUp); |
| 186 | + Assert.Equal(20, sut.Weight, 0.01); |
| 187 | + } |
| 188 | + |
| 189 | + private IServiceProvider CreateServiceProvider(params RuleConfig[] rules) |
| 190 | + { |
| 191 | + return new ServiceCollection() |
| 192 | + .AddOptions() |
| 193 | + .Configure<RulesConfig>(o => o.AddRange(rules)) |
| 194 | + .AddFakeLogging(o => o.OutputSink = testOutputHelper.WriteLine) |
| 195 | + .AddSingleton<TestTimeProvider>() |
| 196 | + .AddSingleton<TimeProvider>(p => p.GetRequiredService<TestTimeProvider>()) |
| 197 | + .AddSingleton<State>() |
| 198 | + .BuildServiceProvider(); |
| 199 | + } |
| 200 | +} |
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