114 lines
3.8 KiB
C#
114 lines
3.8 KiB
C#
#region Copyright notice and license
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// Copyright 2015 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#endregion
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using Grpc.Core;
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using Grpc.Core.Utils;
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using Grpc.Testing;
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using NUnit.Framework;
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namespace Grpc.IntegrationTesting
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{
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public class HistogramTest
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{
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[Test]
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public void Simple()
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{
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var hist = new Histogram(0.01, 60e9);
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hist.AddObservation(10000);
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hist.AddObservation(10000);
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hist.AddObservation(11000);
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hist.AddObservation(11000);
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var data = hist.GetSnapshot();
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Assert.AreEqual(4, data.Count);
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Assert.AreEqual(42000.0, data.Sum, 1e-6);
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Assert.AreEqual(10000, data.MinSeen);
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Assert.AreEqual(11000, data.MaxSeen);
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Assert.AreEqual(2.0*10000*10000 + 2.0*11000*11000, data.SumOfSquares, 1e-6);
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// 1.01^925 < 10000 < 1.01^926
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Assert.AreEqual(2, data.Bucket[925]);
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Assert.AreEqual(2, data.Bucket[935]);
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}
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[Test]
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public void ExtremeObservations()
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{
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var hist = new Histogram(0.01, 60e9);
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hist.AddObservation(-0.5); // should be in the first bucket
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hist.AddObservation(1e12); // should be in the last bucket
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var data = hist.GetSnapshot();
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Assert.AreEqual(1, data.Bucket[0]);
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Assert.AreEqual(1, data.Bucket[data.Bucket.Count - 1]);
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}
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[Test]
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public void MergeSnapshots()
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{
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var data = new HistogramData();
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var hist1 = new Histogram(0.01, 60e9);
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hist1.AddObservation(-0.5); // should be in the first bucket
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hist1.AddObservation(1e12); // should be in the last bucket
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hist1.GetSnapshot(data, false);
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var hist2 = new Histogram(0.01, 60e9);
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hist2.AddObservation(10000);
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hist2.AddObservation(11000);
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hist2.GetSnapshot(data, false);
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Assert.AreEqual(4, data.Count);
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Assert.AreEqual(-0.5, data.MinSeen);
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Assert.AreEqual(1e12, data.MaxSeen);
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Assert.AreEqual(1, data.Bucket[0]);
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Assert.AreEqual(1, data.Bucket[925]);
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Assert.AreEqual(1, data.Bucket[935]);
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Assert.AreEqual(1, data.Bucket[data.Bucket.Count - 1]);
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}
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[Test]
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public void Reset()
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{
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var hist = new Histogram(0.01, 60e9);
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hist.AddObservation(10000);
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hist.AddObservation(11000);
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var data = hist.GetSnapshot(true); // snapshot contains data before reset
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Assert.AreEqual(2, data.Count);
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Assert.AreEqual(10000, data.MinSeen);
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Assert.AreEqual(11000, data.MaxSeen);
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data = hist.GetSnapshot(); // snapshot contains state after reset
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Assert.AreEqual(0, data.Count);
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Assert.AreEqual(double.PositiveInfinity, data.MinSeen);
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Assert.AreEqual(double.NegativeInfinity, data.MaxSeen);
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Assert.AreEqual(0, data.Sum);
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Assert.AreEqual(0, data.SumOfSquares);
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CollectionAssert.AreEqual(new uint[data.Bucket.Count], data.Bucket);
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}
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}
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}
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