public void Entity_PropertyChanged()
{
TestCityContainer ec = new TestCityContainer();
var el = ec.GetEntitySet <City>();
City city = new City
{
Name = "Perrysburg",
CountyName = "Wood",
StateName = "OH"
};
el.Attach(city);
int hasChangesChangeCount = 0;
int entityStateChangeCount = 0;
int validationErrorsChangeCount = 0;
int totalPropertyChangeNotificationCount = 0;
city.PropertyChanged += delegate(object sender, PropertyChangedEventArgs e)
{
totalPropertyChangeNotificationCount++;
if (e.PropertyName == "HasChanges")
{
hasChangesChangeCount++;
}
else if (e.PropertyName == "EntityState")
{
entityStateChangeCount++;
}
else if (e.PropertyName == "ValidationErrors")
{
validationErrorsChangeCount++;
}
};
Assert.IsFalse(city.HasChanges);
Assert.IsFalse(((IChangeTracking)city).IsChanged);
city.StateName = "WA";
Assert.IsTrue(city.HasChanges);
Assert.IsTrue(((IChangeTracking)city).IsChanged);
((IChangeTracking)city).AcceptChanges();
Assert.IsFalse(city.HasChanges);
Assert.IsFalse(((IChangeTracking)city).IsChanged);
city.AssignCityZone("Foo");
Assert.IsTrue(city.HasChanges);
Assert.IsTrue(((IChangeTracking)city).IsChanged);
((IChangeTracking)city).AcceptChanges();
el.Remove(city);
Assert.AreEqual(4, hasChangesChangeCount);
Assert.AreEqual(5, entityStateChangeCount);
Assert.AreEqual(0, validationErrorsChangeCount);
city.ValidationResultCollection.ReplaceErrors(new ValidationResult[] { new ValidationResult(string.Empty) });
Assert.AreEqual(1, validationErrorsChangeCount);
city.ValidationErrors.Clear();
Assert.AreEqual(2, validationErrorsChangeCount);
Assert.AreEqual(23, totalPropertyChangeNotificationCount);
}
public void Entity_AcceptChanges()
{
TestCityContainer ec = new TestCityContainer();
var el = ec.GetEntitySet <City>();
string name = "Perrysburg";
string countyName = "Wood";
string stateName = "OH";
object[] key = new object[] { countyName, name, stateName };
City city = new City
{
Name = name,
CountyName = countyName,
StateName = stateName
};
el.Attach(city);
Assert.AreEqual(1, el.Count);
var cityInCache = el.GetEntityByKey(key);
Assert.AreEqual(city, cityInCache);
// Simulate a delete.
el.Remove(city);
Assert.AreEqual(0, el.Count);
Assert.AreEqual(EntityState.Deleted, city.EntityState);
// Verify that it's still in the cache.
cityInCache = el.GetEntityByKey(key);
Assert.AreEqual(city, cityInCache);
// Clear out part of the PK. (This could happen if someone removes an entity via an EntityCollection. See bug 619454.)
city.CountyName = "";
((IChangeTracking)city).AcceptChanges();
Assert.AreEqual(EntityState.Detached, city.EntityState);
// Verify it's removed from the cache now.
cityInCache = el.GetEntityByKey(key);
Assert.IsNull(cityInCache);
}
public void Entity_GetOriginal()
{
TestCityContainer ec = new TestCityContainer();
var el = ec.GetEntitySet <City>();
City city = new City
{
Name = "Perrysburg",
CountyName = "Wood",
StateName = "OH",
ZoneName = "Foo"
};
el.Attach(city);
// There should not be any original state right now, so this should return null.
var original = (City)city.GetOriginal();
Assert.IsNull(original);
city.ZoneName = "Bar"; // Make a change, causing entity to create original state.
original = (City)city.GetOriginal();
Assert.AreEqual("Foo", original.ZoneName);
}