public void NotRequiresArrange()
{
string input = "abcad";
var arr = new RearrangeChars.CharacterArranger(input);
string result = arr.arrange();
Assert.AreEqual (input, result);
}
public void InvalidShortSet()
{
string input = "aa";
var arr = new RearrangeChars.CharacterArranger(input);
string result = arr.arrange();
Assert.AreEqual("No valid output", result);
}
public void GracefulFromStart()
{
string input = "aaabc";
var arr = new RearrangeChars.CharacterArranger(input);
string result = arr.arrange();
Assert.AreEqual( "abaca",result);
}
public void GracefulFromEnd()
{
string input = "abcaa";
var arr = new RearrangeChars.CharacterArranger(input);
string result = arr.arrange();
bool paired = false;
for (var i = 0; i < result.Length - 1; i++) paired |= (result[i] == result[i + 1]);
Assert.False(paired);
}
