public void SumOfSequence_ShowSequence_RandomTests()
{
var rand = new Random();
Func <int, string> myShowSequence = delegate(int n)
{
if (n == 0)
{
return("0=0");
}
if (n < 0)
{
return(n + "<0");
}
var sum = 0;
var numbers = new int[n + 1];
for (int i = 0; i <= n; i++)
{
sum += i;
numbers[i] = i;
}
return(string.Join("+", numbers) + " = " + sum);
};
for (int r = 0; r < 40; r++)
{
var number = rand.Next(0, 1000);
Assert.AreEqual(myShowSequence(number), SumOfSequence.ShowSequence(number));
}
}
public void SumOfSequence_ShowSequence_NegativeAndZeroTests()
{
Assert.AreEqual("0=0", SumOfSequence.ShowSequence(0));
Assert.AreEqual("-1<0", SumOfSequence.ShowSequence(-1));
Assert.AreEqual("-10<0", SumOfSequence.ShowSequence(-10));
}
public void SumOfSequence_ShowSequence_BasicTests()
{
Assert.AreEqual("0+1+2+3+4+5+6 = 21", SumOfSequence.ShowSequence(6));
Assert.AreEqual("0+1+2+3+4+5+6+7 = 28", SumOfSequence.ShowSequence(7));
}