public void GaussAlgoritmSystemIsWrong()
{
// Arrange
double[] firstEquationCoeffs = new double[] { 4, -3, 2, -1 };
double firstEquationFreeMember = 8;
LinearEquation equation1 = new LinearEquation(firstEquationCoeffs, firstEquationFreeMember);
double[] secondEquationCoeffs = new double[] { 3, -2, 1, -3 };
double secondEquationFreeMember = 7;
LinearEquation equation2 = new LinearEquation(secondEquationCoeffs, secondEquationFreeMember);
double[] thirdEquationCoeffs = new double[] { 5, -3, 1, -8 };
double thirdEquationFreeMember = 1;
LinearEquation equation3 = new LinearEquation(thirdEquationCoeffs, thirdEquationFreeMember);
LinearEquation[] equations = new LinearEquation[] { equation1, equation2, equation3 };
LinearEquationSystem equationSystem = new LinearEquationSystem(equations);
double[] answer = new double[equations.Length];
bool isExceptionThrown = false;
try
{
answer = EquationSolver.Gauss(equationSystem);
}
catch (Exception)
{
isExceptionThrown = true;
}
finally
{
Assert.AreEqual(isExceptionThrown, true);
}
}
public void GaussAlgoritmTest()
{
// Arrange
double[] firstEquationCoeffs = new double[] { 2, -3 };
double firstEquationFreeMember = 5;
double[] secondEquationCoeffs = new double[] { 1, -2 };
double secondEquationFreeMember = 3;
LinearEquation equation1 = new LinearEquation(firstEquationCoeffs, firstEquationFreeMember);
LinearEquation equation2 = new LinearEquation(secondEquationCoeffs, secondEquationFreeMember);
LinearEquationSystem equationSystem = new LinearEquationSystem(new LinearEquation[] { equation1, equation2 });
// Expect
double[] expectedAnswer = new double[] { 1, -1 };
// Actual
double[] actualAnswer = EquationSolver.Gauss(equationSystem);
Assert.AreEqual(expectedAnswer[0], actualAnswer[0], 0.01);
Assert.AreEqual(expectedAnswer[1], actualAnswer[1], 0.01);
}
