public void FindNextBiggerNumber_NegativeTests(int number)
{
var expected = -1;
Assert.AreEqual(expected, IntNumberOperations.FindNextBiggerNumber(number));
}
public void FindNextBiggerNumber_ThrowsArgumentException(int number)
{
Assert.Throws <ArgumentException>(() => IntNumberOperations.FindNextBiggerNumber(number));
}
public void FindNextBiggerNumber_PositiveTests(int number, int expected)
{
Assert.AreEqual(expected, IntNumberOperations.FindNextBiggerNumber(number));
}