public void RollbackTo_CollectionModificationInvalidatesViewModel_RollbackValidatesViewModel()
{
var project1Title = "Title of project1";
var project1 = CreateProject(project1Title);
EmployeeVM.InitializeFrom(CreateEmployee(projects: project1));
EmployeeVM.Revalidate();
Assert.IsTrue(EmployeeVM.IsValid);
var rollbackPoint = EmployeeVM.UndoManager.GetRollbackPoint();
var project2 = CreateProject(project1Title);
var project2VM = new ProjectVM();
project2VM.InitializeFrom(project2);
EmployeeVM.Projects.Add(project2VM);
Assert.IsFalse(EmployeeVM.IsValid);
EmployeeVM.UndoManager.RollbackTo(rollbackPoint);
Assert.IsTrue(EmployeeVM.IsValid);
}
public void MultipleRollbackTo_WithMultipleRollbackPoints_RestoresRollbackPoints()
{
// Arrange
var originalCustomer1Name = "Customer1";
var customer1 = CreateCustomer(originalCustomer1Name);
var customer2 = CreateCustomer();
var originalProject1Title = "Project1";
var projects = new Project[] {
CreateProject(originalProject1Title, customer1),
CreateProject("Project2", customer2)
};
var originalEmployeeName = "Name";
var employee = CreateEmployee(name: originalEmployeeName, projects: projects);
EmployeeVM.InitializeFrom(employee);
ProjectVM[] expectedProjectVMColl = EmployeeVM.Projects.ToArray();
// Act - Assert
var employeeVMRollbackPoint = EmployeeVM.UndoManager.GetRollbackPoint();
var newProject = new ProjectVM();
newProject.InitializeFrom(new Project());
EmployeeVM.Projects.Add(newProject);
EmployeeVM.Name = "ModifiedName";
((IViewModel)EmployeeVM).Kernel.Refresh();
var project1VM = EmployeeVM
.Projects
.Single(x => x.Title == originalProject1Title);
var projectVMRollbackPoint = project1VM.UndoManager.GetRollbackPoint();
project1VM.Title = "ModifiedTitle";
var customerVMRollbackPoint = project1VM.Customer.UndoManager.GetRollbackPoint();
project1VM.Customer.Name = "ModifiedName";
project1VM.Customer.UndoManager.RollbackTo(customerVMRollbackPoint);
Assert.AreEqual(project1VM.Customer.Name, originalCustomer1Name);
project1VM.UndoManager.RollbackTo(projectVMRollbackPoint);
Assert.AreEqual(project1VM.Title, originalProject1Title);
EmployeeVM.Projects.RemoveAt(0);
EmployeeVM.Projects.Clear();
EmployeeVM.UndoManager.RollbackTo(employeeVMRollbackPoint);
Assert.AreEqual(originalEmployeeName, EmployeeVM.Name);
CollectionAssert.AreEqual(expectedProjectVMColl, EmployeeVM.Projects);
}