public void PlotDerivativeWithDx0()
{
// Arrange
var plotter = new SchemeCalculator(evaluator);
// Act
var actual = plotter.PlotDerivative("(lambda (x) (* x x))", 0, 1, 3, 3);
// Assert
Assert.AreEqual(actual, null);
}
public void PlotDerivative1To33Samples()
{
// Arrange
double dx = 0.001;
var plotter = new SchemeCalculator(evaluator);
var expected = new List<KeyValuePair<double, double>>
{
new KeyValuePair<double, double>(1, 2),
new KeyValuePair<double, double>(2, 4),
new KeyValuePair<double, double>(3, 6),
};
// Act
var actual = plotter.PlotDerivative("(lambda (x) (* x x))", dx, 1, 3, 3);
// Assert
for (int i = 0; i < 3; i++)
{
var expectedI = expected[i];
var actualI = actual.ElementAt(i);
Assert.That(actualI.Value, Is.EqualTo(expectedI.Value).Within(dx));
Assert.AreEqual(expectedI.Key, actualI.Key);
}
}