public void printResults_empty()
{
int[] arr = { 0 };
TextMatching s = new TextMatching();
string textMatching = s.PrintResults(arr);
Assert.AreEqual(null, textMatching);
}
public void printResults_invalidValues()
{
int[] arr = new int[] { 1, 2, 3, -1, 5, 6, 7, 8, 9 };
TextMatching s = new TextMatching();
string textMatching = s.PrintResults(arr);
Assert.AreEqual("1,2,3", textMatching);
}