public void Contains_With_Comparer_And_Contains_Must_ReturnTrue(int[] source)
        {
            // Arrange
            var value   = System.Linq.Enumerable.Last(source);
            var wrapped = Wrap.AsValueReadOnlyCollection(source);

            // Act
            var result = ValueReadOnlyCollection
                         .Contains <Wrap.ValueReadOnlyCollection <int>, Wrap.Enumerator <int>, int>(wrapped, value, EqualityComparer <int> .Default);

            // Assert
            _ = result.Must()
                .BeTrue();
        }
        public void Contains_With_Comparer_And_NotContains_Must_ReturnFalse(int[] source)
        {
            // Arrange
            var value   = int.MaxValue;
            var wrapped = Wrap.AsValueReadOnlyCollection(source);

            // Act
            var result = ValueReadOnlyCollection
                         .Contains <Wrap.ValueReadOnlyCollection <int>, Wrap.Enumerator <int>, int>(wrapped, value, EqualityComparer <int> .Default);

            // Assert
            _ = result.Must()
                .BeFalse();
        }