ArgsTests.CLI.Observability.ObservabilityTests.SynchronizeCollection C# (CSharp) Method

        public void SynchronizeCollection()
        {
            var observable = new SomeObservable();
            int addCalls = 0, removeCalls = 0, changedCalls = 0;

            observable.Strings.Add("a");
            observable.Strings.Add("b");

            using (var lifetime = new Lifetime())
            {
                observable.Strings.SynchronizeForLifetime((s) => { addCalls++; }, (s) => { removeCalls++; }, () => { changedCalls++; }, lifetime.LifetimeManager);

                Assert.AreEqual(2, addCalls);
                Assert.AreEqual(0, removeCalls);
                Assert.AreEqual(1, changedCalls);

                observable.Strings.Add("c");
                Assert.AreEqual(3, addCalls);
                Assert.AreEqual(0, removeCalls);
                Assert.AreEqual(2, changedCalls);

                observable.Strings.Remove("a");
                Assert.AreEqual(3, addCalls);
                Assert.AreEqual(1, removeCalls);
                Assert.AreEqual(3, changedCalls);
            }

            observable.Strings.Add("d");
            observable.Strings.Remove("d");
            Assert.AreEqual(3, addCalls);
            Assert.AreEqual(1, removeCalls);
            Assert.AreEqual(3, changedCalls);
        }