public void RandomActionsCompareToString()
{
// Performs random actions on both a string and a rope, comparing the two after each action
string output = ReadChristmasCarol();
Rope ropeCC = RopeBuilder.BUILD(output);
string strCC = new string(output);
for (int i = 0; i < 50000; ++i)
{
// useful values for random access
int length = ropeCC.Length();
int start = rand.Next(length / 2);
int end = Math.Max(start + 1, length - rand.Next(length / 3));
end = Math.Min(end, length);
Array values = Enum.GetValues(typeof(Action));
Action performAction = (Action)values.GetValue(rand.Next(values.Length));
switch (performAction)
{
case Action.Append:
string randomAppend = GetRandomString();
ropeCC = Append(ropeCC, randomAppend);
strCC += randomAppend;
break;
case Action.Delete:
ropeCC = ropeCC.Remove(start, end);
strCC = strCC.Remove(start, end - start);
break;
case Action.Enumerate:
Enumerate(ropeCC);
break;
case Action.Reverse:
ropeCC = Reverse(ropeCC);
char[] charCC = strCC.ToCharArray();
Array.Reverse(charCC);
strCC = new String(charCC);
break;
case Action.IndexOf:
int fromIndex = rand.Next(ropeCC.Length() / 4);
// take a random sequence from the string
int iStart = fromIndex + rand.Next((ropeCC.Length() - fromIndex) / 2);
int randLength = Math.Min(rand.Next(5), strCC.Length - iStart);
string randSubstring = strCC.Substring(iStart, randLength);
Assert.AreEqual(strCC.IndexOf(randSubstring, fromIndex), ropeCC.IndexOf(randSubstring, fromIndex));
break;
case Action.Insert:
int iOffset = rand.Next(strCC.Length / 2);
string strToInsert = GetRandomString();
ropeCC = Insert(ropeCC, iOffset, strToInsert);
strCC = strCC.Substring(0, iOffset) + strToInsert + strCC.Substring(iOffset);
break;
case Action.TrimStart:
case Action.TrimEnd:
ropeCC = Trim(ropeCC);
strCC = strCC.Trim();
break;
case Action.Subsequence:
ropeCC = Subsequence(ropeCC, start, end);
strCC = strCC.Substring(start, end - start);
break;
case Action.PadStart:
case Action.PadEnd:
ropeCC = ropeCC.PadStart(length + 5, ' ');
strCC = strCC.PadLeft(length + 5, ' ');
break;
case Action.StartsWith:
case Action.EndsWith:
Assert.AreEqual(ropeCC.StartsWith("a"), strCC.StartsWith("a"));
Assert.AreEqual(ropeCC.StartsWith("e"), strCC.StartsWith("e"));
Assert.AreEqual(ropeCC.EndsWith("a"), strCC.EndsWith("a"));
Assert.AreEqual(ropeCC.EndsWith("e"), strCC.EndsWith("e"));
Assert.AreEqual(ropeCC.StartsWith("he"), strCC.StartsWith("he"));
Assert.AreEqual(ropeCC.StartsWith("the"), strCC.StartsWith("the"));
Assert.AreEqual(ropeCC.EndsWith("he"), strCC.EndsWith("he"));
Assert.AreEqual(ropeCC.EndsWith("m."), strCC.EndsWith("m."));
break;
}
log.Flush();
Assert.AreEqual(strCC.Length, ropeCC.Length());
int j = 0;
foreach (char c in ropeCC)
{
Assert.AreEqual(c, strCC[j]);
j++;
}
}
log.Flush();
}
private void StartsEndsWith(Rope ropeCC)
{
log.WriteLine(GetCurrentMethod());
log.WriteLine("Starts with a? " + ropeCC.StartsWith("a"));
log.WriteLine("Ends with a? " + ropeCC.EndsWith("a"));
}