public SolutionEquation Execute(double a, double b, double c)
{
if (a == 0)
{
if (b == 0)
{
return(SolutionEquation.CreateInfinityCountSolutions());
}
return(SolutionEquation.CreateSolutions(-c / b));
}
var descrimenant = b * b - 4 * a * c;
if (descrimenant < 0)
{
return(SolutionEquation.CreateWithoutSolutions());
}
if (descrimenant == 0)
{
return(SolutionEquation.CreateSolutions(-b / (2 * a)));
}
var sqrtDescrimenant = Math.Sqrt(descrimenant);
var x1 = (-b - sqrtDescrimenant) / (2 * a);
var x2 = (-b + sqrtDescrimenant) / (2 * a);
return(SolutionEquation.CreateSolutions(x1, x2));
}
public void GetViewSolution_OneSolutions_CorrectPartView()
{
// arrange
var x = 1;
var paramsEquation = new ParamsEquation(0, 0, 0);
var s = SolutionEquation.CreateSolutions(x);
// act
var view = paramsEquation.GetViewSolution(s);
// assert
Assert.IsTrue(view.Contains(paramsEquation.ToString()));
Assert.IsTrue(view.Contains($"один корень: x = {x}"));
}
public void GetViewSolution_TwoSolutions_CorrectPartView()
{
// arrange
var x1 = 1;
var x2 = 2;
var paramsEquation = new ParamsEquation(0, 0, 0);
var s = SolutionEquation.CreateSolutions(x1, x2);
// act
var view = paramsEquation.GetViewSolution(s);
// assert
Assert.IsTrue(view.Contains(paramsEquation.ToString()));
Assert.IsTrue(view.Contains($"два корня: x1 = {x1}, x2 = {x2}"));
}