public void NegativeCalculationTest()
{
var viewModel = new AppViewModel();
ObservableCollection <Solution> solutions = new ObservableCollection <Solution>();
Solution solution = new Solution {
X = 2, Y = 3
};
var equztion_lines = new Equation {
name = "Линейная", Multiplier = 1, Solution = solutions, A = 1, B = 2, C = 3
};
var equation_4_degree = new Equation {
name = "4-ой степени", Multiplier = 4, Solution = solutions, A = 1, B = 2, C = 3000
};
Assert.IsTrue(viewModel.Calculation(equztion_lines, solution) != 8);
Assert.IsTrue(viewModel.Calculation(equation_4_degree, solution) != 3071);
}