public void SensitivityFact()
{
var interp = new LinearInterpolator(new double[] { 0, 10 }, new double[] { 10, 10 });
var r = interp.Sensitivity(5);
Assert.Equal(0.5, r[0]);
Assert.Equal(0.5, r[1]);
r = interp.Sensitivity(0);
Assert.Equal(1.0, r[0]);
Assert.Equal(0.0, r[1]);
r = interp.Sensitivity(60);
Assert.Equal(0.0, r[0]);
Assert.Equal(1.0, r[1]);
var interp2 = new LinearInterpolatorFlatExtrap(new double[] { 0, 10 }, new double[] { 10, 10 });
var r2 = interp2.Sensitivity(5);
Assert.Equal(0.5, r2[0]);
Assert.Equal(0.5, r2[1]);
r2 = interp2.Sensitivity(0);
Assert.Equal(1.0, r2[0]);
Assert.Equal(0.0, r2[1]);
r2 = interp2.Sensitivity(60);
Assert.Equal(0.0, r2[0]);
Assert.Equal(1.0, r2[1]);
var interp3 = new LinearInterpolatorFlatExtrapNoBinSearch(new double[] { 0, 10 }, new double[] { 10, 10 });
var r3 = interp3.Sensitivity(5);
Assert.Equal(0.5, r3[0]);
Assert.Equal(0.5, r3[1]);
r3 = interp3.Sensitivity(0);
Assert.Equal(1.0, r3[0]);
Assert.Equal(0.0, r3[1]);
r3 = interp3.Sensitivity(60);
Assert.Equal(0.0, r3[0]);
Assert.Equal(1.0, r3[1]);
}