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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using Microsoft.Xunit.Performance;
namespace Functions
{
public static partial class MathTests
{
// Tests Math.Cos(double) over 5000 iterations for the domain 0, PI
private const double cosDoubleDelta = 0.0006283185307180;
private const double cosDoubleExpectedResult = -1.0000000005924159;
[Benchmark]
public static void CosDoubleBenchmark()
{
foreach (var iteration in Benchmark.Iterations)
{
using (iteration.StartMeasurement())
{
CosDoubleTest();
}
}
}
public static void CosDoubleTest()
{
var result = 0.0; var value = 0.0;
for (var iteration = 0; iteration < iterations; iteration++)
{
value += cosDoubleDelta;
result += Math.Cos(value);
}
var diff = Math.Abs(cosDoubleExpectedResult - result);
if (diff > doubleEpsilon)
{
throw new Exception($"Expected Result {cosDoubleExpectedResult}; Actual Result {result}");
}
}
}
}
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