public void AddRangeIfTestNullCheck()
        {
            // ReSharper disable once AssignNullToNotNullAttribute
            Action test = () => CollectionTEx.AddRangeIf(null, x => true, "test0", "test1", "test2");

            test.ShouldThrow <ArgumentNullException>();
        }
        public void AddRangeIfTest1NullCheck()
        {
            // ReSharper disable once AssignNullToNotNullAttribute
            Action test = () => CollectionTEx.AddRangeIf(null, x => true, new List <String> {
                "test0", "test1", "test2"
            });

            Assert.Throws <ArgumentNullException>(test);
        }