System.Linq.Tests.WhereTests.WhereSelect_List_ReturnsExpectedValues C# (CSharp) Метод

        public void WhereSelect_List_ReturnsExpectedValues()
        {
            List<int> source = new List<int> { 1, 2, 3, 4, 5 };
            Func<int, bool> evenPredicate = (value) => value % 2 == 0;
            Func<int, int> addSelector = (value) => value + 1;

            IEnumerable<int> result = source.Where(evenPredicate).Select(addSelector);

            Assert.Equal(2, result.Count());
            Assert.Equal(3, result.ElementAt(0));
            Assert.Equal(5, result.ElementAt(1));
        }