public void When_ExtendedWithANonCollidingCollection_Then_BoughTagCollectionJoined()
        {
            var deltaCollection = TagsCollection
                                  .New()
                                  .SetTag("01", "01")
                                  .SetTag("02", "02");

            var extendedCollection = tagsCollection.ExtendWith(deltaCollection);

            Assert.IsTrue(extendedCollection.ContainsKey(TagsCollection.HOST));
            Assert.IsTrue(extendedCollection.ContainsKey("01"));
            Assert.IsTrue(extendedCollection.ContainsKey("02"));
        }