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sampling: applying to unit tests to replace custom sampling providers

Signed-off-by: Christoph Ruegg <git@cdrnet.ch>
pull/2/head
Christoph Ruegg 17 years ago
parent
commit
33a23505d1
  1. 3
      src/UnitTests/IntegralTransformsTests/FourierTest.cs
  2. 5
      src/UnitTests/IntegralTransformsTests/MatchingNaiveTransformTest.cs
  3. 14
      src/UnitTests/IntegralTransformsTests/SampleProvider.cs
  4. 27
      src/UnitTests/InterpolationTests/InterpolationFunctionalContract.cs
  5. 107
      src/UnitTests/InterpolationTests/InterpolationInfrastuctureTest.cs
  6. 81
      src/UnitTests/InterpolationTests/SampleProvider.cs
  7. 1
      src/UnitTests/UnitTests.csproj

3
src/UnitTests/IntegralTransformsTests/FourierTest.cs

@ -32,6 +32,7 @@ namespace MathNet.Numerics.UnitTests.IntegralTransformsTests
using MbUnit.Framework; using MbUnit.Framework;
using IntegralTransforms; using IntegralTransforms;
using IntegralTransforms.Algorithms; using IntegralTransforms.Algorithms;
using Sampling;
[TestFixture] [TestFixture]
public class FourierTest public class FourierTest
@ -39,7 +40,7 @@ namespace MathNet.Numerics.UnitTests.IntegralTransformsTests
[Test] [Test]
public void NaiveTransformsRealSineCorrectly() public void NaiveTransformsRealSineCorrectly()
{ {
var samples = SampleProvider.ProvideComplexRealSine(16); var samples = Sample.EquidistantPeriodic(w => new Complex(Math.Sin(w), 0), Constants.Pi2, 0, 16);
// real-odd transforms to imaginary odd // real-odd transforms to imaginary odd
var dft = new DiscreteFourierTransform(); var dft = new DiscreteFourierTransform();

5
src/UnitTests/IntegralTransformsTests/MatchingNaiveTransformTest.cs

@ -32,6 +32,7 @@ namespace MathNet.Numerics.UnitTests.IntegralTransformsTests
using IntegralTransforms; using IntegralTransforms;
using IntegralTransforms.Algorithms; using IntegralTransforms.Algorithms;
using MbUnit.Framework; using MbUnit.Framework;
using Sampling;
[TestFixture] [TestFixture]
public class MatchingNaiveTransformTest public class MatchingNaiveTransformTest
@ -58,7 +59,7 @@ namespace MathNet.Numerics.UnitTests.IntegralTransformsTests
public void FourierRadix2MatchesNaiveOnRealSine(FourierOptions options) public void FourierRadix2MatchesNaiveOnRealSine(FourierOptions options)
{ {
var dft = new DiscreteFourierTransform(); var dft = new DiscreteFourierTransform();
var samples = SampleProvider.ProvideComplexRealSine(16); var samples = Sample.EquidistantPeriodic(w => new Complex(Math.Sin(w), 0), Constants.Pi2, 0, 16);
VerifyMatchesNaiveComplex( VerifyMatchesNaiveComplex(
samples, samples,
@ -102,7 +103,7 @@ namespace MathNet.Numerics.UnitTests.IntegralTransformsTests
public void FourierBluesteinMatchesNaiveOnRealSineNonPowerOfTwo(FourierOptions options) public void FourierBluesteinMatchesNaiveOnRealSineNonPowerOfTwo(FourierOptions options)
{ {
var dft = new DiscreteFourierTransform(); var dft = new DiscreteFourierTransform();
var samples = SampleProvider.ProvideComplexRealSine(14); var samples = Sample.EquidistantPeriodic(w => new Complex(Math.Sin(w), 0), Constants.Pi2, 0, 14);
VerifyMatchesNaiveComplex( VerifyMatchesNaiveComplex(
samples, samples,

14
src/UnitTests/IntegralTransformsTests/SampleProvider.cs

@ -57,17 +57,5 @@ namespace MathNet.Numerics.UnitTests.IntegralTransformsTests
return samples; return samples;
} }
internal static Complex[] ProvideComplexRealSine(int count)
{
double halfPeriod = count / 2.0;
var samples = new Complex[count];
for (int i = 0; i < samples.Length; i++)
{
samples[i] = Math.Sin(i * Constants.Pi / halfPeriod);
}
return samples;
}
} }
} }

27
src/UnitTests/InterpolationTests/InterpolationFunctionalContract.cs

@ -33,6 +33,7 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
using Interpolation; using Interpolation;
using MbUnit.Framework; using MbUnit.Framework;
using MbUnit.Framework.ContractVerifiers; using MbUnit.Framework.ContractVerifiers;
using Sampling;
internal class InterpolationFunctionalContract<TInterpolation> : AbstractContract internal class InterpolationFunctionalContract<TInterpolation> : AbstractContract
where TInterpolation : IInterpolation where TInterpolation : IInterpolation
@ -94,8 +95,8 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
"LinearBehavior", "LinearBehavior",
() => () =>
{ {
const double yOffset = 2.0; const double YOffset = 2.0;
const double xOffset = 4.0; const double XOffset = 4.0;
var random = new Random(); var random = new Random();
int[] orders = { MinimumSampleCount, MinimumSampleCount + 1, MinimumSampleCount + 5 }; int[] orders = { MinimumSampleCount, MinimumSampleCount + 1, MinimumSampleCount + 5 };
@ -109,8 +110,8 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
var values = new double[order]; var values = new double[order];
for (int i = 0; i < points.Length; i++) for (int i = 0; i < points.Length; i++)
{ {
points[i] = xOffset + i; points[i] = XOffset + i;
values[i] = yOffset + i; values[i] = YOffset + i;
} }
var interpolation = Factory(points, values); var interpolation = Factory(points, values);
@ -120,17 +121,17 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
var testValues = new double[order + 1]; var testValues = new double[order + 1];
if (order == 1) if (order == 1)
{ {
testPoints[0] = xOffset - random.NextDouble(); testPoints[0] = XOffset - random.NextDouble();
testPoints[1] = xOffset + random.NextDouble(); testPoints[1] = XOffset + random.NextDouble();
testValues[0] = testValues[1] = yOffset; testValues[0] = testValues[1] = YOffset;
} }
else else
{ {
for (int i = 0; i < testPoints.Length; i++) for (int i = 0; i < testPoints.Length; i++)
{ {
double z = (i - 1) + random.NextDouble(); double z = (i - 1) + random.NextDouble();
testPoints[i] = xOffset + z; testPoints[i] = XOffset + z;
testValues[i] = yOffset + z; testValues[i] = YOffset + z;
} }
} }
@ -176,8 +177,8 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
"RationalBehavior", "RationalBehavior",
() => () =>
{ {
double[] points, values; double[] points;
SampleProvider.Equidistant(t => 1 / (1 + (t * t)), -5.0, 5.0, 41, out points, out values); double[] values = Sample.EquidistantInterval(t => 1 / (1 + (t * t)), -5.0, 5.0, 41, out points);
var interpolation = Factory(points, values); var interpolation = Factory(points, values);
for (int i = 0; i < points.Length; i++) for (int i = 0; i < points.Length; i++)
@ -189,8 +190,8 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
"Match on knots"); "Match on knots");
} }
double[] testPoints, testValues; double[] testPoints;
SampleProvider.Equidistant(t => 1 / (1 + (t * t)), -5.0, 5.0, 81, out testPoints, out testValues); double[] testValues = Sample.EquidistantInterval(t => 1 / (1 + (t * t)), -5.0, 5.0, 81, out testPoints);
for (int i = 0; i < testPoints.Length; i++) for (int i = 0; i < testPoints.Length; i++)
{ {

107
src/UnitTests/InterpolationTests/InterpolationInfrastuctureTest.cs

@ -34,6 +34,7 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
using Interpolation.Algorithms; using Interpolation.Algorithms;
using MbUnit.Framework; using MbUnit.Framework;
using MbUnit.Framework.ContractVerifiers; using MbUnit.Framework.ContractVerifiers;
using Sampling;
[TestFixture] [TestFixture]
public class InterpolationInfrastuctureTest public class InterpolationInfrastuctureTest
@ -54,8 +55,8 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
new Expression<Func<IInterpolation>>[] new Expression<Func<IInterpolation>>[]
{ {
() => new NevillePolynomialInterpolation( () => new NevillePolynomialInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)) Sample.EquidistantStartingAt(t => t, -2, 0.5, 10))
} }
}; };
@ -73,11 +74,11 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
new Expression<Func<IInterpolation>>[] new Expression<Func<IInterpolation>>[]
{ {
() => new BulirschStoerRationalInterpolation( () => new BulirschStoerRationalInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10)),
() => Interpolate.RationalWithPoles( () => Interpolate.RationalWithPoles(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)) Sample.EquidistantStartingAt(t => t, -2, 0.5, 10))
} }
}; };
@ -97,13 +98,13 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
new Expression<Func<IInterpolation>>[] new Expression<Func<IInterpolation>>[]
{ {
() => new BarycentricInterpolation( () => new BarycentricInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10),
SampleProvider.LinearEquidistant(10, 1, 0.1)), Sample.EquidistantStartingAt(t => t, 1, 0.1, 10)),
() => new BarycentricInterpolation( () => new BarycentricInterpolation(
SampleProvider.LinearEquidistant(10, 5, -1), Sample.EquidistantStartingAt(t => t, 5, -1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10),
SampleProvider.LinearEquidistant(10, 1, 0.1)) Sample.EquidistantStartingAt(t => t, 1, 0.1, 10))
} }
}; };
@ -121,18 +122,18 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
new Expression<Func<IInterpolation>>[] new Expression<Func<IInterpolation>>[]
{ {
() => new FloaterHormannRationalInterpolation( () => new FloaterHormannRationalInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10)),
() => new FloaterHormannRationalInterpolation( () => new FloaterHormannRationalInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10),
5), 5),
() => Interpolate.RationalWithoutPoles( () => Interpolate.RationalWithoutPoles(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10)),
() => Interpolate.Common( () => Interpolate.Common(
SampleProvider.LinearEquidistant(10, 5, -1), Sample.EquidistantStartingAt(t => t, 5, -1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)) Sample.EquidistantStartingAt(t => t, -2, 0.5, 10))
} }
}; };
@ -150,15 +151,15 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
new Expression<Func<IInterpolation>>[] new Expression<Func<IInterpolation>>[]
{ {
() => new EquidistantPolynomialInterpolation( () => new EquidistantPolynomialInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10)),
() => new EquidistantPolynomialInterpolation( () => new EquidistantPolynomialInterpolation(
SampleProvider.LinearEquidistant(10, 5, -1), Sample.EquidistantStartingAt(t => t, 5, -1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10)),
() => new EquidistantPolynomialInterpolation( () => new EquidistantPolynomialInterpolation(
-5, -5,
4, 4,
SampleProvider.LinearEquidistant(10, -2, 0.5)) Sample.EquidistantStartingAt(t => t, -2, 0.5, 10))
} }
}; };
@ -178,18 +179,18 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
new Expression<Func<IInterpolation>>[] new Expression<Func<IInterpolation>>[]
{ {
() => new SplineInterpolation( () => new SplineInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(4 * (10 - 1), -2, 0.5)), Sample.EquidistantStartingAt(t => t, -2, 0.5, 4 * (10 - 1))),
() => new SplineInterpolation( () => new SplineInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
AkimaSplineInterpolation.EvaluateSplineCoefficients( AkimaSplineInterpolation.EvaluateSplineCoefficients(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5))), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10))),
() => new SplineInterpolation( () => new SplineInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
CubicSplineInterpolation.EvaluateSplineCoefficients( CubicSplineInterpolation.EvaluateSplineCoefficients(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10),
SplineBoundaryCondition.Natural, SplineBoundaryCondition.Natural,
1.0, 1.0,
SplineBoundaryCondition.Natural, SplineBoundaryCondition.Natural,
@ -211,9 +212,9 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
new Expression<Func<IInterpolation>>[] new Expression<Func<IInterpolation>>[]
{ {
() => new CubicHermiteSplineInterpolation( () => new CubicHermiteSplineInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10),
SampleProvider.LinearEquidistant(10, 1, 0.1)) Sample.EquidistantStartingAt(t => t, 1, 0.1, 10))
} }
}; };
@ -231,11 +232,11 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
new Expression<Func<IInterpolation>>[] new Expression<Func<IInterpolation>>[]
{ {
() => new LinearSplineInterpolation( () => new LinearSplineInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10)),
() => Interpolate.LinearBetweenPoints( () => Interpolate.LinearBetweenPoints(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)) Sample.EquidistantStartingAt(t => t, -2, 0.5, 10))
} }
}; };
@ -253,32 +254,32 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
new Expression<Func<IInterpolation>>[] new Expression<Func<IInterpolation>>[]
{ {
() => new CubicSplineInterpolation( () => new CubicSplineInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10)),
() => new CubicSplineInterpolation( () => new CubicSplineInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10),
SplineBoundaryCondition.FirstDerivative, SplineBoundaryCondition.FirstDerivative,
1.0, 1.0,
SplineBoundaryCondition.FirstDerivative, SplineBoundaryCondition.FirstDerivative,
-1.0), -1.0),
() => new CubicSplineInterpolation( () => new CubicSplineInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10),
SplineBoundaryCondition.Natural, SplineBoundaryCondition.Natural,
1.0, 1.0,
SplineBoundaryCondition.Natural, SplineBoundaryCondition.Natural,
-1.0), -1.0),
() => new CubicSplineInterpolation( () => new CubicSplineInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5), Sample.EquidistantStartingAt(t => t, -2, 0.5, 10),
SplineBoundaryCondition.ParabolicallyTerminated, SplineBoundaryCondition.ParabolicallyTerminated,
1.0, 1.0,
SplineBoundaryCondition.ParabolicallyTerminated, SplineBoundaryCondition.ParabolicallyTerminated,
-1.0), -1.0),
() => new CubicSplineInterpolation( () => new CubicSplineInterpolation(
SampleProvider.LinearEquidistant(2, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 2),
SampleProvider.LinearEquidistant(2, -2, 0.5), Sample.EquidistantStartingAt(t => t, -2, 0.5, 2),
SplineBoundaryCondition.ParabolicallyTerminated, SplineBoundaryCondition.ParabolicallyTerminated,
1.0, 1.0,
SplineBoundaryCondition.ParabolicallyTerminated, SplineBoundaryCondition.ParabolicallyTerminated,
@ -300,8 +301,8 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
new Expression<Func<IInterpolation>>[] new Expression<Func<IInterpolation>>[]
{ {
() => new AkimaSplineInterpolation( () => new AkimaSplineInterpolation(
SampleProvider.LinearEquidistant(10, -5, 1), Sample.EquidistantStartingAt(t => t, -5, 1, 10),
SampleProvider.LinearEquidistant(10, -2, 0.5)) Sample.EquidistantStartingAt(t => t, -2, 0.5, 10))
} }
}; };
@ -340,4 +341,4 @@ namespace MathNet.Numerics.UnitTests.InterpolationTests
0)); 0));
} }
} }
} }

81
src/UnitTests/InterpolationTests/SampleProvider.cs

@ -1,81 +0,0 @@
// <copyright file="SampleProvider.cs" company="Math.NET">
// Math.NET Numerics, part of the Math.NET Project
// http://mathnet.opensourcedotnet.info
//
// Copyright (c) 2009 Math.NET
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
// </copyright>
namespace MathNet.Numerics.UnitTests.InterpolationTests
{
using System;
internal static class SampleProvider
{
internal static double[] LinearEquidistant(int count, double start, double step)
{
var samples = new double[count];
var nextValue = start;
for (int i = 0; i < samples.Length; i++)
{
samples[i] = nextValue;
nextValue += step;
}
return samples;
}
internal static void Equidistant(
Func<double, double> f,
double start,
double stop,
int samples,
out double[] points,
out double[] values)
{
points = new double[samples];
values = new double[samples];
if (samples == 0)
{
return;
}
if (samples == 1)
{
double t = points[0] = 0.5 * (start + stop);
values[0] = f(t);
return;
}
double step = (stop - start) / (samples - 1);
for (int i = 0; i < points.Length; i++)
{
double t = start + (i * step);
points[i] = t;
values[i] = f(t);
}
}
}
}

1
src/UnitTests/UnitTests.csproj

@ -81,7 +81,6 @@
<Compile Include="InterpolationTests\InterpolationFunctionalContract.cs" /> <Compile Include="InterpolationTests\InterpolationFunctionalContract.cs" />
<Compile Include="InterpolationTests\InterpolationInfrastructureContract.cs" /> <Compile Include="InterpolationTests\InterpolationInfrastructureContract.cs" />
<Compile Include="InterpolationTests\InterpolationFunctionalTest.cs" /> <Compile Include="InterpolationTests\InterpolationFunctionalTest.cs" />
<Compile Include="InterpolationTests\SampleProvider.cs" />
<Compile Include="LinearAlgebraTests\Double\DenseVectorTests.cs" /> <Compile Include="LinearAlgebraTests\Double\DenseVectorTests.cs" />
<Compile Include="LinearAlgebraTests\Double\VectorTests.cs" /> <Compile Include="LinearAlgebraTests\Double\VectorTests.cs" />
<Compile Include="NumberTheoryTests\GcdRelatedTest.cs" /> <Compile Include="NumberTheoryTests\GcdRelatedTest.cs" />

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