File: RegexTrial.cs

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using System;
using System.Text.RegularExpressions;

using NUnit.Framework;

namespace MonoTests.System.Text.RegularExpressions {

	class RegexTrial {
		public string pattern;
		public RegexOptions options;
		public string input;

		public string expected;
		public string error = "";

		public RegexTrial (string pattern, RegexOptions options, string input, string expected)
		{
			this.pattern = pattern;
			this.options = options;
			this.input = input;
			this.expected = expected;
		}

		public string Expected {
			get { return expected; }
		}
		
		public string Error {
			get { return this.error; }
		}

		public void Execute ()
		{
			string result;

			try {
				Regex re = new Regex (pattern, options);
				Match m = re.Match (input);

				if (m.Success) {
					result = "Pass.";

					for (int i = 0; i < m.Groups.Count; ++ i) {
						Group group = m.Groups [i];

						result += " Group[" + i + "]=";
						foreach (Capture cap in group.Captures)
							result += "(" + cap.Index + "," + cap.Length + ")";
					}
				} else {
					result = "Fail.";
				}
			}
			catch (Exception e) {
				error = e.Message + "\n" + e.StackTrace + "\n\n";

				result = "Error.";
			}

			Assert.AreEqual (expected, result,
					 "Matching input '{0}' against pattern '{1}' with options '{2}'", input, pattern, options);
		}
	}

	class Checksum {
		public Checksum () {
			this.sum = 0;
		}

		public uint Value {
			get { return sum; }
		}

		public void Add (string str) {
			for (int i = 0; i < str.Length; ++ i)
				Add (str[i], 16);
		}

		public void Add (uint n) {
			Add (n, 32);
		}

		public void Add (ulong n, int bits) {
			ulong mask = 1ul << (bits - 1);
			for (int i = 0; i < bits; ++ i) {
				Add ((n & mask) != 0);
				mask >>= 1;
			}
		}

		public void Add (bool bit) {
			bool top = (sum & 0x80000000) != 0;
			sum <<= 1;
			sum ^= bit ? (uint)1 : (uint)0;

			if (top)
				sum ^= key;
		}

		private uint sum;
		private readonly uint key = 0x04c11db7;
	}
}