public static void PerfectNumberShouldThrowEx(int number)
{
// Arrange
// Assert
Assert.Throws <ArgumentException>(() => PerfectNumberChecker.IsPerfectNumber(number));
}
public static void PerfectNumberWork(int number)
{
// Arrange
// Act
var result = PerfectNumberChecker.IsPerfectNumber(number);
// Assert
Assert.IsTrue(result);
}