Dev2.Core.Tests.DebugStateTreeViewItemViewModelTests.Verify_AppendError C# (CSharp) Method

        static void Verify_AppendError(bool contentHasError)
        {
            //------------Setup for test--------------------------
            const string AppendError = "Appended text";
            const string ContentError = "Content text";

            var content = new DebugState { DisplayName = "Error Test", ID = Guid.NewGuid(), ActivityType = ActivityType.Workflow };

            var expectedProps = new[] { "Content.ErrorMessage", "Content.HasError", "Content", "HasError" };
            var actualProps = new List<string>();

            var envRep = CreateEnvironmentRepository();
            var vm = new DebugStateTreeViewItemViewModelMock(envRep.Object) { Content = content };
            vm.PropertyChanged += (sender, args) => actualProps.Add(args.PropertyName);

            //------------Execute Test---------------------------
            vm.Content.HasError = contentHasError;
            vm.Content.ErrorMessage = ContentError;
            vm.AppendError(AppendError);

            //------------Assert Results-------------------------
            if(contentHasError)
            {
                Assert.AreEqual(ContentError + AppendError, content.ErrorMessage);
            }
            else
            {
                Assert.AreEqual(AppendError, content.ErrorMessage);
            }
            Assert.IsTrue(content.HasError);
            Assert.IsTrue(vm.HasError != null && vm.HasError.Value);

            CollectionAssert.AreEqual(expectedProps, actualProps);
        }