public void ToStringNegReturnsCorrectResult()
{
PolyFunction testFunc = new PolyFunction(new[] {-5, 0, -1, -3});
var str = testFunc.ToString();
Assert.AreEqual("-3x^3-x^2-5", str);
}
public void ToStringReturnsCorrectResult()
{
PolyFunction testFunc = new PolyFunction(new[] {5, 0, 1, 3});
var str = testFunc.ToString();
Assert.AreEqual("3x^3+x^2+5", str);
}
public void DeriveReturnsCorrectResult()
{
PolyFunction testFunc = new PolyFunction(new[] {5, 0, 1, 3});
var derivedFunc = testFunc.Derive();
string str = derivedFunc.ToString();
Assert.AreEqual("9x^2+2x", str);
}
