Cadenza.Collections.Tests.MutableLookupTest.GroupingEnumerator C# (CSharp) Метод

        public void GroupingEnumerator()
        {
            List<int> ints = new List<int> { 10, 20, 21, 30 };
            var lookup = new MutableLookup<int, int>(ints.ToLookup(i => Int32.Parse(i.ToString()[0].ToString())));

            Assert.AreEqual (2, lookup[2].Count());
            Assert.IsTrue (lookup[2].Any (i => i == 20));
            Assert.IsTrue (lookup[2].Any(i => i == 21));
        }