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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.Pow(double, double) over 5000 iterations for the domain x: +2, +1; y: -2, -1
private const double powDoubleDeltaX = -0.0004;
private const double powDoubleDeltaY = 0.0004;
private const double powDoubleExpectedResult = 4659.4627376138733;
[Benchmark]
public static void PowDoubleBenchmark()
{
foreach (var iteration in Benchmark.Iterations)
{
using (iteration.StartMeasurement())
{
PowDoubleTest();
}
}
}
public static void PowDoubleTest()
{
var result = 0.0; var valueX = 2.0; var valueY = -2.0;
for (var iteration = 0; iteration < iterations; iteration++)
{
valueX += powDoubleDeltaX; valueY += powDoubleDeltaY;
result += Math.Pow(valueX, valueY);
}
var diff = Math.Abs(powDoubleExpectedResult - result);
if (diff > doubleEpsilon)
{
throw new Exception($"Expected Result {powDoubleExpectedResult,20:g17}; Actual Result {result,20:g17}");
}
}
}
}
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