public void TestToString()
{
double val1 = 1.1;
double val2 = 2.1;
double val3 = 3.1;
string sep = ", ";
String result = val1.ToString(CultureInfo.CurrentCulture) + sep + val2.ToString(CultureInfo.CurrentCulture) + sep +
val3.ToString(CultureInfo.CurrentCulture);
Cartesian test = new Cartesian(val1, val2, val3);
Assert.AreEqual(result, test.ToString());
}