public void Lookup_AddedAndNotRemoved_ReturnsTrue(TestType value, long timestamp)
        {
            var lwwSet = new LWW_OptimizedSet <TestType>();

            lwwSet = lwwSet.Merge(new[] { new LWW_OptimizedSetElement <TestType>(value, timestamp, false) }.ToImmutableHashSet());

            var lookup = lwwSet.Lookup(value);

            Assert.True(lookup);
        }
        public void Merge_MergesAddsAndRemoves(TestType one, TestType two, TestType three, long timestamp)
        {
            var elementOne   = new LWW_OptimizedSetElement <TestType>(one, timestamp, false);
            var elementTwo   = new LWW_OptimizedSetElement <TestType>(two, timestamp + 1, true);
            var elementThree = new LWW_OptimizedSetElement <TestType>(one, timestamp + 2, true);
            var elementFour  = new LWW_OptimizedSetElement <TestType>(three, timestamp + 3, false);
            var elementFive  = new LWW_OptimizedSetElement <TestType>(two, timestamp, true);

            var lwwSet = new LWW_OptimizedSet <TestType>(new[] { elementOne, elementTwo }.ToImmutableHashSet());

            var newLwwSet = lwwSet.Merge(new[] { elementThree, elementFour, elementFive }.ToImmutableHashSet());

            Assert.Equal(5, newLwwSet.Elements.Count);
            Assert.Contains(newLwwSet.Elements, e => Equals(e, elementTwo));
            Assert.Contains(newLwwSet.Elements, e => Equals(e, elementThree));
            Assert.Contains(newLwwSet.Elements, e => Equals(e, elementFour));
        }