System.Linq.Tests.SelectTests.Select_SourceIsEmptyEnumerable_ReturnedCollectionHasNoElements C# (CSharp) Метод

        public void Select_SourceIsEmptyEnumerable_ReturnedCollectionHasNoElements()
        {
            IEnumerable<int> source = Enumerable.Empty<int>();
            bool wasSelectorCalled = false;

            IEnumerable<int> result = source.Select(i => { wasSelectorCalled = true; return i + 1; });

            bool hadItems = false;
            foreach (var item in result)
            {
                hadItems = true;
            }

            Assert.False(hadItems);
            Assert.False(wasSelectorCalled);
        }