public void TestSolveForY()
{
var testStdDev = 2.5D;
var testSubject = new RLinearEquation(0.1056, -181.45)
{
StdDev = testStdDev
};
var testCtrl = new LinearEquation(0.1056, -181.45);
for (var i = 16; i < 64; i++)
{
var x = DateTime.Today.AddYears(-1 * i).ToDouble();
var testAvg = testCtrl.SolveForY(x);
var testResult = testSubject.SolveForY(DateTime.Today.AddYears(-1 * i).ToDouble());
var expectedFarLeft = (testAvg - testStdDev * 3.25);
var expectedFarRight = (testAvg + testStdDev * 3.25);
var tr = expectedFarLeft <= testResult && testResult <= expectedFarRight;
if (!tr)
{
Console.WriteLine($"{expectedFarLeft} <= {testResult} <= {expectedFarRight}");
}
Assert.IsTrue(tr);
}
}
public void TestSolveForY_WithRange()
{
var testStdDev = 2.5D;
var testSubject = new RLinearEquation(0.1056, -181.45)
{
StdDev = testStdDev, MinX = 1914D, MaxX = 2055D
};
var testCtrl = new LinearEquation(0.1056, -181.45);
var testResult = testSubject.SolveForY(800);
//the true equation will produce nonsense results for the distant past
var testUnconstrained = testCtrl.SolveForY(800);
Console.WriteLine($"{testUnconstrained} < {testResult}");
Assert.IsTrue(testResult > testUnconstrained);
//likewise for distant future
testResult = testSubject.SolveForY(3030);
testUnconstrained = testCtrl.SolveForY(3030);
Console.WriteLine($"{testUnconstrained} > {testResult}");
Assert.IsTrue(testResult < testUnconstrained);
}
