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

        public void EnumeratorNotNull()
        {
            List<string> strings = new List<string> { "hi", "hai", "bai", "bye" };
            var lookup = new MutableLookup<string, string> (strings.ToLookup (s => s[0].ToString()));

            Assert.AreEqual (2, lookup.Count);
            Assert.IsTrue (lookup.Any (g => g.Key == "h"));
            Assert.IsTrue (lookup.Any (g => g.Key == "b"));
            Assert.IsFalse (lookup.Any (g => g.Key == null));
        }