public void TrySolveSystem_1()
{
// Input strings containing linear equations
string linearequation_1 = "-6x+9y+5z=8";
string linearequation_2 = "-7x-12y+z=-28";
string linearequation_3 = "5x+6y+z=-28";
// List of linear equations
List<LinearPolynomial> lpList = new List<LinearPolynomial>();
lpList.Add(new LinearPolynomial(linearequation_1));
lpList.Add(new LinearPolynomial(linearequation_2));
lpList.Add(new LinearPolynomial(linearequation_3));
// System of linear equations
LinearEquationSystem leSystem =
new LinearEquationSystem(lpList);
// Actual values
Dictionary<string, string> actualSolution =
leSystem.FindSolution_MatrixMethod();
// Expected values
Dictionary<string, string> expectedSolution =
new Dictionary<string, string>() {
{"x", "-8,70588235294118"},
{"y", "5,80392156862745"},
{"z", "-19,2941176470588"},
};
// Asserts
CollectionAssert.AreEqual(expectedSolution, actualSolution);
}
// Method for solving system of linear equations,
// where count of linear equation = linearequationcount,
// count of unknown members = unknowncount,
// strlist - list of linear equations formated as strings
public string TrySolveLinearEquationSystem(int linearequationcount,
int unknowncount, List<string> strlist)
{
// Result
string result = "";
try
{
// Initialize the system of linear equation from strlist
List<LinearPolynomial> linearequationlist = new List<LinearPolynomial>();
foreach (string str in strlist)
{
LinearPolynomial linPolynomial =
new LinearPolynomial(str);
// If str is a linear polynomial
if (linPolynomial.Members.Count != 0)
linearequationlist.Add(linPolynomial);
}
LinearEquationSystem leSystem =
new LinearEquationSystem(linearequationlist);
// If wrong input data
if (leSystem.LinearEquationCount != linearequationcount
|| leSystem.UnknownCount != unknowncount
|| linearequationcount != strlist.Count)
{
result = "Wrong input system. "
+ "Check the input data for pattern matching "
+ "(look at the example).";
return result;
}
// Try to find the solution of the system
Dictionary<string, string> Solution
= leSystem.FindSolution_MatrixMethod();
foreach (var root in Solution)
result += root.Key + ": " + root.Value
+ " ";
}
catch (Exception exception)
{
// Write to log
logger.WriteLog(System.DateTime.Now.ToString()
+ " "
+ exception.TargetSite.ToString()
+ " "
+ exception.Message);
result = "Wrong input system. "
+ "Check the input data for pattern matching "
+ "(look at the example).";
}
return result;
}
public void ConstructorTest(string validInputStr_1, string validInputStr_2,
string validInputStr_3, int uCount)
{
// List of linear equations
List<LinearPolynomial> lpList = new List<LinearPolynomial>();
lpList.Add(new LinearPolynomial(validInputStr_1));
lpList.Add(new LinearPolynomial(validInputStr_2));
lpList.Add(new LinearPolynomial(validInputStr_3));
// System of linear equations
LinearEquationSystem leSystem =
new LinearEquationSystem(lpList);
// Actual values
int actualSystemCount = leSystem.LinearEquationCount;
int actualSystemUnknownCount = leSystem.UnknownCount;
// Asserts
Assert.AreEqual(3, actualSystemCount);
Assert.AreEqual(uCount, actualSystemUnknownCount);
}
public void TrySolveSystem_2()
{
// Input strings containing linear equations
string linearequation_1 = "-6.8x+9y+5z=8";
string linearequation_2 = "-7.8x-12.6y-z=2";
string linearequation_3 = "5x+6y+z+6t=-3";
// List of linear equations
List<LinearPolynomial> lpList = new List<LinearPolynomial>();
lpList.Add(new LinearPolynomial(linearequation_1));
lpList.Add(new LinearPolynomial(linearequation_2));
lpList.Add(new LinearPolynomial(linearequation_3));
// System of linear equations
LinearEquationSystem leSystem =
new LinearEquationSystem(lpList);
// Actual values
Dictionary<string, string> actualSolution =
leSystem.FindSolution_MatrixMethod();
// Expected values
Dictionary<string, string> expectedSolution =
new Dictionary<string, string>() {
{"This system have",
"an infinite number of solutions."}
};
// Asserts
CollectionAssert.AreEqual(expectedSolution, actualSolution);
}
public void TrySolveSystem_3()
{
// Input strings containing linear equations
string linearequation_1 = "4x-3y+2z-t=8";
string linearequation_2 = "3x-2y+1z-3t=7";
string linearequation_3 = "5x-3y+z-8t=1";
// List of linear equations
List<LinearPolynomial> lpList = new List<LinearPolynomial>();
lpList.Add(new LinearPolynomial(linearequation_1));
lpList.Add(new LinearPolynomial(linearequation_2));
lpList.Add(new LinearPolynomial(linearequation_3));
// System of linear equations
LinearEquationSystem leSystem =
new LinearEquationSystem(lpList);
// Actual values
Dictionary<string, string> actualSolution =
leSystem.FindSolution_MatrixMethod();
// Expected values
Dictionary<string, string> expectedSolution =
new Dictionary<string, string>() {
{"This system have",
"no solution."}
};
// Asserts
CollectionAssert.AreEqual(expectedSolution, actualSolution);
}
