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| 1 | +// Copyright (c) Microsoft Corporation. All rights reserved. |
| 2 | +// Licensed under the MIT License. |
| 3 | + |
| 4 | +using System.Reflection; |
| 5 | +using Xunit; |
| 6 | + |
| 7 | +namespace Azure.Monitor.OpenTelemetry.Exporter.Tests |
| 8 | +{ |
| 9 | + public class StorageTransmissionEvaluatorTests |
| 10 | + { |
| 11 | + private const int SampleSize = 5; |
| 12 | + |
| 13 | + [Fact] |
| 14 | + public void ConstructorInitializesInstanceVariablesForEvaluation() |
| 15 | + { |
| 16 | + var storageTransmissionEvaluator = new StorageTransmissionEvaluator(SampleSize); |
| 17 | + var sampleSize = typeof(StorageTransmissionEvaluator) |
| 18 | + .GetField("_sampleSize", BindingFlags.Instance | BindingFlags.NonPublic) |
| 19 | + .GetValue(storageTransmissionEvaluator); |
| 20 | + var previousExportStartTimeInMilliseconds = typeof(StorageTransmissionEvaluator) |
| 21 | + .GetField("_previousExportStartTimeInMilliseconds", BindingFlags.Instance | BindingFlags.NonPublic) |
| 22 | + .GetValue(storageTransmissionEvaluator); |
| 23 | + var exportDurationInSeconds = typeof(StorageTransmissionEvaluator) |
| 24 | + .GetField("_exportDurationsInMilliseconds", BindingFlags.Instance | BindingFlags.NonPublic) |
| 25 | + .GetValue(storageTransmissionEvaluator) as long[]; |
| 26 | + var exportIntervalsInSeconds = typeof(StorageTransmissionEvaluator) |
| 27 | + .GetField("_exportIntervalsInMilliseconds", BindingFlags.Instance | BindingFlags.NonPublic) |
| 28 | + .GetValue(storageTransmissionEvaluator) as long[]; |
| 29 | + |
| 30 | + Assert.Equal(SampleSize, (int)sampleSize); |
| 31 | + Assert.NotNull(exportIntervalsInSeconds); |
| 32 | + Assert.NotNull(exportDurationInSeconds); |
| 33 | + Assert.Equal(SampleSize, exportIntervalsInSeconds.Length); |
| 34 | + Assert.Equal(SampleSize, exportDurationInSeconds.Length); |
| 35 | + Assert.Equal(0, (long)previousExportStartTimeInMilliseconds); |
| 36 | + } |
| 37 | + |
| 38 | + [Fact] |
| 39 | + public void MaxFilesToBeTransmittedIsNonZeroWhenExportDurationIsLessThanExportInterval() |
| 40 | + { |
| 41 | + var storageTransmissionEvaluator = new StorageTransmissionEvaluator(SampleSize); |
| 42 | + for (int i = 0; i < SampleSize; i++) |
| 43 | + { |
| 44 | + storageTransmissionEvaluator.AddExportIntervalToDataSample((i+1)*3000); |
| 45 | + storageTransmissionEvaluator.AddExportDurationToDataSample(1000); |
| 46 | + } |
| 47 | + var maxFiles = storageTransmissionEvaluator.GetMaxFilesToTransmitFromStorage(); |
| 48 | + |
| 49 | + Assert.True(maxFiles > 0); |
| 50 | + } |
| 51 | + |
| 52 | + [Fact] |
| 53 | + public void MaxFilesToBeTransmittedIsZeroWhenExportDurationIsGreaterThanExportInterval() |
| 54 | + { |
| 55 | + var storageTransmissionEvaluator = new StorageTransmissionEvaluator(SampleSize); |
| 56 | + for (int i = 0; i < SampleSize; i++) |
| 57 | + { |
| 58 | + storageTransmissionEvaluator.AddExportIntervalToDataSample((i+1)*1000); |
| 59 | + storageTransmissionEvaluator.AddExportDurationToDataSample(2000); |
| 60 | + } |
| 61 | + var maxFiles = storageTransmissionEvaluator.GetMaxFilesToTransmitFromStorage(); |
| 62 | + |
| 63 | + Assert.Equal(0, maxFiles); |
| 64 | + } |
| 65 | + |
| 66 | + [Fact] |
| 67 | + public void MaxFilesToBeTransmittedIsZeroWhenCurrentBatchExportDurationIsGreaterThanExportInterval() |
| 68 | + { |
| 69 | + var storageTransmissionEvaluator = new StorageTransmissionEvaluator(SampleSize); |
| 70 | + |
| 71 | + for (int i = 0; i < SampleSize; i++) |
| 72 | + { |
| 73 | + storageTransmissionEvaluator.AddExportIntervalToDataSample((i+1)*3000); |
| 74 | + storageTransmissionEvaluator.AddExportDurationToDataSample(1000); |
| 75 | + } |
| 76 | + |
| 77 | + // Update the currentBatchExportDuration to a greater value |
| 78 | + // than avg export interval. |
| 79 | + typeof(StorageTransmissionEvaluator) |
| 80 | + .GetField("_currentBatchExportDurationInMilliseconds", BindingFlags.Instance | BindingFlags.NonPublic) |
| 81 | + .SetValue(storageTransmissionEvaluator, 10000); |
| 82 | + var maxFiles = storageTransmissionEvaluator.GetMaxFilesToTransmitFromStorage(); |
| 83 | + |
| 84 | + Assert.Equal(0, maxFiles); |
| 85 | + } |
| 86 | + |
| 87 | + [Fact] |
| 88 | + public void MaxFilesToBeTransmittedIsZeroWhenDataSamplesAreLessThanSampleSize() |
| 89 | + { |
| 90 | + var storageTransmissionEvaluator = new StorageTransmissionEvaluator(SampleSize); |
| 91 | + //For Sample Size 5, 5th export will have enough samples to make the decision |
| 92 | + for (int i = 0; i < 4; i++) |
| 93 | + { |
| 94 | + storageTransmissionEvaluator.AddExportDurationToDataSample((i+1)*3000); |
| 95 | + storageTransmissionEvaluator.AddExportDurationToDataSample(1000); |
| 96 | + } |
| 97 | + var maxFiles = storageTransmissionEvaluator.GetMaxFilesToTransmitFromStorage(); |
| 98 | + |
| 99 | + Assert.Equal(0, maxFiles); |
| 100 | + } |
| 101 | + |
| 102 | + [Fact] |
| 103 | + public void ExportIntervalAndDurationsAreUpdatedInCircularManner() |
| 104 | + { |
| 105 | + var storageTransmissionEvaluator = new StorageTransmissionEvaluator(SampleSize); |
| 106 | + long timeInMilliseconds = 2000; |
| 107 | + long exportInterval = 0; |
| 108 | + |
| 109 | + // Add data points equal to sample size |
| 110 | + for (int i = 0; i < SampleSize; i++) |
| 111 | + { |
| 112 | + exportInterval += 2000; |
| 113 | + storageTransmissionEvaluator.AddExportIntervalToDataSample(exportInterval); |
| 114 | + storageTransmissionEvaluator.AddExportDurationToDataSample(timeInMilliseconds); |
| 115 | + } |
| 116 | + |
| 117 | + var exportIntervalsInSecondsBefore = typeof(StorageTransmissionEvaluator) |
| 118 | + .GetField("_exportIntervalsInMilliseconds", BindingFlags.Instance | BindingFlags.NonPublic) |
| 119 | + .GetValue(storageTransmissionEvaluator) as long[]; |
| 120 | + |
| 121 | + var exportDurationInSecondsBefore = typeof(StorageTransmissionEvaluator) |
| 122 | + .GetField("_exportDurationsInMilliseconds", BindingFlags.Instance | BindingFlags.NonPublic) |
| 123 | + .GetValue(storageTransmissionEvaluator) as long[]; |
| 124 | + |
| 125 | + // Add data points equal to sample size |
| 126 | + for (int i = 0; i < SampleSize; i++) |
| 127 | + { |
| 128 | + Assert.Equal(2000, exportIntervalsInSecondsBefore[i]); |
| 129 | + Assert.Equal(2000, exportDurationInSecondsBefore[i]); |
| 130 | + } |
| 131 | + |
| 132 | + // Add 3 more data points with different time values |
| 133 | + for (int i = 0; i < 3; i++) |
| 134 | + { |
| 135 | + exportInterval += 1000; |
| 136 | + storageTransmissionEvaluator.AddExportIntervalToDataSample(exportInterval); |
| 137 | + storageTransmissionEvaluator.AddExportDurationToDataSample(1000); |
| 138 | + } |
| 139 | + |
| 140 | + // First 3 elements should be updated |
| 141 | + for (int i = 0; i < 3; i++) |
| 142 | + { |
| 143 | + Assert.Equal(1000, exportIntervalsInSecondsBefore[i]); |
| 144 | + Assert.Equal(1000, exportDurationInSecondsBefore[i]); |
| 145 | + } |
| 146 | + |
| 147 | + // Last two should remain the same |
| 148 | + for (int i = 3; i < SampleSize; i++) |
| 149 | + { |
| 150 | + Assert.Equal(2000, exportIntervalsInSecondsBefore[i]); |
| 151 | + Assert.Equal(2000, exportDurationInSecondsBefore[i]); |
| 152 | + } |
| 153 | + |
| 154 | + // Adding samples more than sample szie should not throw any exception |
| 155 | + for (int i = 3; i < 2*SampleSize; i++) |
| 156 | + { |
| 157 | + storageTransmissionEvaluator.AddExportIntervalToDataSample((i + 1) * timeInMilliseconds); |
| 158 | + storageTransmissionEvaluator.AddExportDurationToDataSample(timeInMilliseconds); |
| 159 | + } |
| 160 | + } |
| 161 | + } |
| 162 | +} |
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