public void ValidateDiscriminant_negative_NoRoots()
{
var discriminant = -3;
var output_errorTest = "Данное уравнение не имеет решений в области вещественных чисел";
var output_errorFromMethod = Equation_solver.ValidateDiscriminant(discriminant);
Assert.AreEqual(output_errorTest, output_errorFromMethod);
}
public void Result_RootsToOutput_equal()
{
double left_root = -3;
double right_root = -1;
string outputTest = String.Format("Первый корень x1={0:f} Второй корень x2={1:f}", left_root, right_root);
var outputFromMethod = Equation_solver.ShowResult(left_root, right_root);
Assert.AreEqual(outputTest, outputFromMethod);
}
public void Check_discriminant()
{
var coeff = new int[3] {
1, 4, 3
};
var discriminantTest = Math.Pow(coeff[1], 2) - 4 * coeff[0] * coeff[2];
var discriminantFromMethod = Equation_solver.FindDiscriminant(coeff);
Assert.AreEqual(discriminantTest, discriminantFromMethod);
}
public void Check_right_root()
{
var discriminant = 4;
var coeff = new int[2] {
1, 4
};
var rootTest = -1;
var rootFromMethod = Equation_solver.FindRightRoot(discriminant, coeff);
Assert.AreEqual(rootTest, rootFromMethod);
}
public void Parsing_inputToArray_equal()
{
string input = "1x^2+4x+3=0";
var coeffTest = new int[3] {
1, 4, 3
};
var coeffFromMethod = Equation_solver.Parsing(input);
for (int i = 0; i < 3; i++)
{
Assert.AreEqual(coeffFromMethod[i], coeffTest[i]);
}
}
