public void TestMatchTrianglePentagonalHexagonalMatch()
{
const int triangleIndex = 285;
const int pentagonalIndex = 165;
const int hexagonalIndex = 143;
var numberGenerator = new NumberGenerator();
long triangleNumber = numberGenerator.GetTriangleNumber(triangleIndex);
long pentagonalNumber = numberGenerator.GetPentagonalNumber(pentagonalIndex);
long hexagonalNumber = numberGenerator.GetHexagonalNumber(hexagonalIndex);
Assert.Equal(triangleNumber, pentagonalNumber);
Assert.Equal(hexagonalNumber, pentagonalNumber);
}