public void TestBadMapping()
{
const String characters = "AbXZCA";
var table = new Trie(characters);
// access a character that is not in the map
int index = table.MapCharacter('W');
Assert.IsTrue(index == -1);
}
public void TestMapping()
{
const String characters = "AbXZCA";
var table = new Trie(characters);
// dupilcate letters are ignored
Assert.IsTrue(condition: table.NumberOfUniqueCharacters == 5);
// Check the indexs
// A=0, b=1, X=2, .etc
int x = 0;
foreach (var c in characters) {
int index = table.MapCharacter(c);
Assert.IsTrue(x == index);
++x;
// the tail in the sting, A, is really index 0 again
if (x == 5) {
x = 0;
}
}
}