Create test combinations for legacy code.

TestCombinations.cs

    [UseReporter(typeof(DiffReporter))]
    [TestClass]
    public class TestCombinations
    {
        public string RunLegacyManagerProcessor(string a, int b, bool c)
        {
            if (c) return "42";
            if (b > 12) return a.Length.ToString();
            return b.ToString();
        }

        [TestMethod]
        public void TestAllCombinations()
        {
            var name = new[] { "Jack" };
            var age = new[] { 42 };
            var isRegistered = new[] { false };
            CombinationApprovals.VerifyAllCombinations(RunLegacyManagerProcessor, name, age, isRegistered);
        }

        [TestMethod]
        public void TestMoreCombinations()
        {
            var name = new[] { "Jack", "John", "Steve" };
            var age = new[] { 42, 23, 15 };
            var isRegistered = new[] { false, true };
            CombinationApprovals.VerifyAllCombinations(RunLegacyManagerProcessor, name, age, isRegistered);
        }
    }