public void ResetCalculationState()
{
var criterium = new ResidualStopCriterium(1e-3, 10);
Assert.IsNotNull(criterium, "There should be a criterium");
var solution = new DenseVector(new[] {0.001, 0.001, 0.002});
var source = new DenseVector(new[] {0.001, 0.001, 0.002});
var residual = new DenseVector(new[] {1.000, 1.000, 2.001});
var status = criterium.DetermineStatus(5, solution, source, residual);
Assert.AreEqual(IterationStatus.Continue, status, "Should be running");
criterium.Reset();
Assert.AreEqual(IterationStatus.Continue, criterium.Status, "Should not have started");
}
public void DetermineStatusWithSourceNaN()
{
var criterium = new ResidualStopCriterium(1e-3, 10);
Assert.IsNotNull(criterium, "There should be a criterium");
var solution = new DenseVector(new[] {1.0, 1.0, 2.0});
var source = new DenseVector(new[] {1.0, 1.0, double.NaN});
var residual = new DenseVector(new[] {1000.0, 1000.0, 2001.0});
var status = criterium.DetermineStatus(5, solution, source, residual);
Assert.AreEqual(IterationStatus.Diverged, status, "Should be diverged");
}
public void DetermineStatusWithNonMatchingSourceVectorThrowsArgumentException()
{
var criterium = new ResidualStopCriterium(1e-8, 50);
Assert.IsNotNull(criterium, "There should be a criterium");
Assert.Throws<ArgumentException>(() => criterium.DetermineStatus(
1,
DenseVector.Create(3, i => 4),
DenseVector.Create(4, i => 4),
DenseVector.Create(3, i => 4)));
}
public void DetermineStatusWithIllegalIterationNumberThrowsArgumentOutOfRangeException()
{
var criterium = new ResidualStopCriterium(1e-8, 50);
Assert.IsNotNull(criterium, "There should be a criterium");
Assert.Throws<ArgumentOutOfRangeException>(() => criterium.DetermineStatus(
-1,
DenseVector.Create(3, i => 4),
DenseVector.Create(3, i => 5),
DenseVector.Create(3, i => 6)));
}
public void DetermineStatusWithConvergenceAtFirstIteration()
{
var criterium = new ResidualStopCriterium();
Assert.IsNotNull(criterium, "There should be a criterium");
var solution = new DenseVector(new[] {1.0, 1.0, 1.0});
var source = new DenseVector(new[] {1.0, 1.0, 1.0});
var residual = new DenseVector(new[] {0.0, 0.0, 0.0});
var status = criterium.DetermineStatus(0, solution, source, residual);
Assert.AreEqual(IterationStatus.Converged, status, "Should be done");
}
public void DetermineStatus()
{
var criterium = new ResidualStopCriterium(1e-3, 10);
Assert.IsNotNull(criterium, "There should be a criterium");
// the solution vector isn't actually being used so ...
var solution = new DenseVector(new[] {double.NaN, double.NaN, double.NaN});
// Set the source values
var source = new DenseVector(new[] {1.000, 1.000, 2.001});
// Set the residual values
var residual = new DenseVector(new[] {0.001, 0.001, 0.002});
var status = criterium.DetermineStatus(5, solution, source, residual);
Assert.AreEqual(IterationStatus.Continue, status, "Should still be running");
var status2 = criterium.DetermineStatus(16, solution, source, residual);
Assert.AreEqual(IterationStatus.Converged, status2, "Should be done");
}
