public async Task HasChangesChangedEvent()
{
var entityManager = await TestFns.NewEm(_todosServiceName);
int eventCount = 0;
var lastEventArgs = new EntityManagerHasChangesChangedEventArgs(entityManager);
entityManager.HasChangesChanged += (s, e) => { lastEventArgs = e; ++eventCount; };
// Add a new Todo
var newTodo = entityManager.CreateEntity <TodoItem>();
newTodo.Description = "New Todo Item";
newTodo.CreatedAt = DateTime.Today;
Assert.AreEqual(1, eventCount, "Only one HasChangedChanged event should be signalled when entity added");
Assert.IsTrue(lastEventArgs.HasChanges, "HasChanagesChanged should signal true after new entity added");
eventCount = 0;
// Discard the added Todo
try {
entityManager.RejectChanges();
}
catch (Exception e) {
var message = "RejectChanges() should not fail with the error " + e.Message;
Assert.Fail(message);
}
Assert.AreEqual(1, eventCount, "Only one HasChangedChanged event should be signalled on RejectChanges() call");
Assert.IsFalse(lastEventArgs.HasChanges, "HasChanagesChanged should signal false after RejectChanges() call");
Assert.IsFalse(entityManager.HasChanges(), "EntityManager should have no pending changes after RejectChanges() call");
eventCount = 0;
// Add another new Todo
var newTodo2 = entityManager.CreateEntity <TodoItem>();
newTodo2.Description = "New Todo Item2";
// newTodo2.CreatedAt = DateTime.Today;
Assert.AreEqual(1, eventCount, "Only one HasChangedChanged event should be signalled when entity added");
Assert.IsTrue(lastEventArgs.HasChanges, "HasChangesChanged should signal true after new entity added");
eventCount = 0;
// Save changes
try {
await entityManager.SaveChanges();
}
catch (SaveException e) {
var message = "SaveChanges() should not fail with the error " + e.Message;
e.ValidationErrors.ForEach(ve =>
{
message += Environment.NewLine + " " + ve.Message;
});
Assert.Fail(message);
}
Assert.AreEqual(1, eventCount, "Only one HasChangedChanged event should be signalled on SaveChanges() call");
Assert.IsFalse(lastEventArgs.HasChanges, "HasChanagesChanged should signal false after SaveChanges() call");
Assert.IsFalse(entityManager.HasChanges(), "EntityManager should have no pending changes after SaveChanges() call");
eventCount = 0;
}
public async Task HasChangesChangedEvent() {
var entityManager = await TestFns.NewEm(_todosServiceName);
int eventCount = 0;
var lastEventArgs = new EntityManagerHasChangesChangedEventArgs(entityManager);
entityManager.HasChangesChanged += (s, e) => { lastEventArgs = e; ++eventCount; };
// Add a new Todo
var newTodo = entityManager.CreateEntity<TodoItem>();
newTodo.Description = "New Todo Item";
newTodo.CreatedAt = DateTime.Today;
Assert.AreEqual(1, eventCount, "Only one HasChangedChanged event should be signalled when entity added");
Assert.IsTrue(lastEventArgs.HasChanges, "HasChanagesChanged should signal true after new entity added");
eventCount = 0;
// Discard the added Todo
try {
entityManager.RejectChanges();
}
catch (Exception e) {
var message = "RejectChanges() should not fail with the error " + e.Message;
Assert.Fail(message);
}
Assert.AreEqual(1, eventCount, "Only one HasChangedChanged event should be signalled on RejectChanges() call");
Assert.IsFalse(lastEventArgs.HasChanges, "HasChanagesChanged should signal false after RejectChanges() call");
Assert.IsFalse(entityManager.HasChanges(), "EntityManager should have no pending changes after RejectChanges() call");
eventCount = 0;
// Add another new Todo
var newTodo2 = entityManager.CreateEntity<TodoItem>();
newTodo2.Description = "New Todo Item2";
// newTodo2.CreatedAt = DateTime.Today;
Assert.AreEqual(1, eventCount, "Only one HasChangedChanged event should be signalled when entity added");
Assert.IsTrue(lastEventArgs.HasChanges, "HasChangesChanged should signal true after new entity added");
eventCount = 0;
// Save changes
try {
await entityManager.SaveChanges();
}
catch (SaveException e) {
var message = "SaveChanges() should not fail with the error " + e.Message;
e.ValidationErrors.ForEach(ve =>
{
message += Environment.NewLine + " " + ve.Message;
});
Assert.Fail(message);
}
Assert.AreEqual(1, eventCount, "Only one HasChangedChanged event should be signalled on SaveChanges() call");
Assert.IsFalse(lastEventArgs.HasChanges, "HasChanagesChanged should signal false after SaveChanges() call");
Assert.IsFalse(entityManager.HasChanges(), "EntityManager should have no pending changes after SaveChanges() call");
eventCount = 0;
}
