public void Parse_1()
{
string str = "cos(x)*(e^(3+7x)-2e^(2x))";
var result = StringToSummand.Parse(str);
result.Should().HaveCount(1);
result[0].PolynomialDegree.Should().Be(0);
result[0].Coefficient.Should().Be(1.0);
result[0].Multiplicands.Should().HaveCount(1);
result[0].Multiplicands[0].Should()
.Match <Cosine>(
x =>
MathHelper.AreApproximatelyEqual(x.Aparam, 1.0) &&
MathHelper.AreApproximatelyEqual(x.Bparam, 0.0));
result[0].SumsRaisedToPower.Should().HaveCount(1);
result[0].SumsRaisedToPower[0].Degree.Should().Be(1);
var sum = result[0].SumsRaisedToPower[0].Sum;
sum.Should().HaveCount(2);
sum[0].PolynomialDegree.Should().Be(0);
sum[0].Coefficient.Should().Be(1.0);
sum[0].Multiplicands.Should().HaveCount(1);
sum[0].Multiplicands[0].Should()
.Match <ExponentialFunction>(
x =>
MathHelper.AreApproximatelyEqual(x.Aparam, 7.0) &&
MathHelper.AreApproximatelyEqual(x.Bparam, 3.0));
sum[1].PolynomialDegree.Should().Be(0);
sum[1].Coefficient.Should().Be(-2);
sum[1].Multiplicands.Should().HaveCount(1);
sum[1].Multiplicands[0].Should()
.Match <ExponentialFunction>(
x =>
MathHelper.AreApproximatelyEqual(x.Aparam, 2.0) &&
MathHelper.AreApproximatelyEqual(x.Bparam, 0.0));
}
public void Parse_6()
{
string str = "x^(2/3)";
var a = StringToSummand.FindPolynomialDegree("x^(2/3)");
var result = StringToSummand.Parse(str);
result.Should().HaveCount(1);
result[0].PolynomialDegree.Should().Be(0);
result[0].Coefficient.Should().Be(1.0);
result[0].Multiplicands.Should().HaveCount(1);
result[0].Multiplicands[0].Should()
.Match <PowerFunction>(
x =>
MathHelper.AreApproximatelyEqual(x.Aparam, 1.0) &&
MathHelper.AreApproximatelyEqual(x.Bparam, 0.0) &&
x.PowerNumerator == 2 &&
x.PowerDenominator == 3);
result[0].SumsRaisedToPower.Should().HaveCount(0);
}
// (lim x->0) sin (x + 3) = sin(3) ~ 0.141120008059867
public void CalculateLimit_AndReturnsCorrectLimit_5()
{
var numerator = new List <Summand>
{
new Summand
{
Coefficient = 1.0,
Multiplicands = new List <IElementaryFunction>
{
new Sine()
{
Aparam = 1.0,
Bparam = 3
}
}
}
};
var denominator = new List <Summand>
{
new Summand
{
Coefficient = 1.0
}
};
var normalizedFunction = new NormalizedFunction
{
Numerator = numerator,
Denominator = denominator
};
var result = LimitCalculator.CalculateLimit(normalizedFunction, 0);
result.LimitResultType.Should().Be(LimitResultType.RealNumber);
MathHelper.AreApproximatelyEqual(result.Value, 0.141, 0.005).Should().BeTrue();
}