public void TestFindsInfiniteSolutions()
{
var firstEquation = new LinearEquation(18, -3, 45);
var secondEquation = new LinearEquation(6, -1, 15);
var coefficients = new List <LinearEquation>()
{
firstEquation, secondEquation
};
bool invalidCoefficients;
var actualSolution = LinearSimultaneousEquationsAnalysisFunctions.CalculateSolution(coefficients, out invalidCoefficients);
var expectedSolution = new LinearSimultaneousEquationsSolution(Convert.ToDouble(-14) / Convert.ToDouble(6), 1, false, true);
Assert.IsTrue(EqualSolutions(expectedSolution, actualSolution));
}
public void TestFindsNoSolution()
{
var firstEquation = new LinearEquation(18, -3, 46);
var secondEquation = new LinearEquation(6, -1, 12);
var coefficients = new List <LinearEquation>()
{
firstEquation, secondEquation
};
bool invalidCoefficients;
var actualSolution = LinearSimultaneousEquationsAnalysisFunctions.CalculateSolution(coefficients, out invalidCoefficients);
var expectedSolution = new LinearSimultaneousEquationsSolution(Double.NaN, Double.NaN, true, false);
Assert.IsTrue(EqualSolutions(expectedSolution, actualSolution));
}
public void TestFindsUniqueSolution()
{
var firstEquation = new LinearEquation(3, 2, -36);
var secondEquation = new LinearEquation(5, 4, -64);
var coefficients = new List <LinearEquation>()
{
firstEquation, secondEquation
};
bool invalidCoefficients;
var actualSolution = LinearSimultaneousEquationsAnalysisFunctions.CalculateSolution(coefficients, out invalidCoefficients);
var expectedSolution = new LinearSimultaneousEquationsSolution(8, 6, false, false);
Assert.IsTrue(EqualSolutions(expectedSolution, actualSolution));
Assert.IsFalse(invalidCoefficients);
}
public LinearSimultaneousEquations CovertToLinearSimultaneousEquations()
{
var equations = new List <LinearEquation>()
{
new LinearEquation(FirstEquationXTerm, FirstEquationYTerm, FirstEquationConstantTerm),
new LinearEquation(SecondEquationXTerm, SecondEquationYTerm, SecondEquationConstantTerm)
};
var solution = LinearSimultaneousEquationsAnalysisFunctions.CalculateSolution(equations, out var invalidSolution);
if (invalidSolution)
{
throw new Exception("Data was stored incorrectly.");
}
return(new LinearSimultaneousEquations(equations, solution));
}