public void HandleChange_WithPropertyChangedOfOwnViewModelProperty_UpdatesCachedResults()
{
var owner = new TestVM();
owner.MakePropertiesAndViewModelInvalid();
var expected = owner.GetCurrentlySetupResults();
// S E T C H I L D
var firstChild = new ViewModelStub {
ValidationResult = CreateValidationResult("First child error")
};
var propertyChangedArgs = ChangeArgs
.ViewModelPropertyChanged(
owner.SecondProperty,
ValueStage.ValidatedValue,
oldValue: null,
newValue: firstChild)
.PrependViewModel(owner);
owner.CallHandleChangeWith(propertyChangedArgs);
expected.Descenants = firstChild.ValidationResult;
AssertBehaviorResults(owner, expected);
// C H A N G E C H I L D
var secondChild = new ViewModelStub {
ValidationResult = CreateValidationResult("Second child error")
};
propertyChangedArgs = ChangeArgs
.ViewModelPropertyChanged(
owner.SecondProperty,
ValueStage.ValidatedValue,
oldValue: firstChild,
newValue: secondChild)
.PrependViewModel(owner);
owner.CallHandleChangeWith(propertyChangedArgs);
expected.Descenants = secondChild.ValidationResult;
AssertBehaviorResults(owner, expected);
// S E T C H I L D T O N U L L
propertyChangedArgs = ChangeArgs
.ViewModelPropertyChanged(
owner.SecondProperty,
ValueStage.ValidatedValue,
oldValue: secondChild,
newValue: null)
.PrependViewModel(owner);
owner.CallHandleChangeWith(propertyChangedArgs);
expected.Descenants = ValidationResult.Valid;
AssertBehaviorResults(owner, expected);
}
public void HandleChange_WithItemsAddedOrRemovedFromOwnCollection_UpdatesCachedResults()
{
var owner = new TestVM();
owner.MakePropertiesAndViewModelInvalid();
var expected = owner.GetCurrentlySetupResults();
// F I R S T A D D
var firstNewItem = new ViewModelStub {
ValidationResult = CreateValidationResult("First new item error")
};
var collectionChangeArgs = ChangeArgs
.ItemsAdded(VMCollectionStub.Build(), new[] { firstNewItem })
.PrependViewModel(owner);
owner.CallHandleChangeWith(collectionChangeArgs);
expected.Descenants = firstNewItem.ValidationResult;
AssertBehaviorResults(owner, expected);
// S E C O N D A D D
var secondNewItem = new ViewModelStub {
ValidationResult = CreateValidationResult("Second new Item error")
};
collectionChangeArgs = ChangeArgs
.ItemsAdded(VMCollectionStub.Build(), new[] { secondNewItem })
.PrependViewModel(owner);
owner.CallHandleChangeWith(collectionChangeArgs);
expected.Descenants = ValidationResult.Join(
firstNewItem.ValidationResult,
secondNewItem.ValidationResult
);
AssertBehaviorResults(owner, expected);
// R E M O V AL
collectionChangeArgs = ChangeArgs
.ItemsRemoved(VMCollectionStub.Build(), new[] { firstNewItem })
.PrependViewModel(owner);
owner.CallHandleChangeWith(collectionChangeArgs);
expected.Descenants = secondNewItem.ValidationResult;
AssertBehaviorResults(owner, expected);
}
public void HandleChange_WithValidationResultChangedOfOwnViewModel_UpdatesBehaviorOfParentViewModel()
{
var child = new TestVM();
var parent = new TestVM();
parent.MakePropertiesAndViewModelInvalid();
child.ViewModelResultSetup = CreateValidationResult("View model error");
child.Kernel.Parents.Add(parent);
child.CallHandleChangeForViewModel();
var expectedParentResult = parent.GetCurrentlySetupResults();
expectedParentResult.Descenants = child.ValidationResult;
AssertBehaviorResults(parent, expectedParentResult);
}
public void HandleChange_WithItemsAddedToOwnCollection_UpdatesBehaviorOfParentViewModel()
{
var parent = new TestVM();
var owner = new TestVM();
parent.MakePropertiesAndViewModelInvalid();
owner.Kernel.Parents.Add(parent);
var newItem = new ViewModelStub {
ValidationResult = CreateValidationResult("New item error")
};
var collectionChangeArgs = ChangeArgs
.ItemsAdded(VMCollectionStub.Build(), new[] { newItem })
.PrependViewModel(owner);
owner.CallHandleChangeWith(collectionChangeArgs);
var expectedParentResult = parent.GetCurrentlySetupResults();
expectedParentResult.Descenants = newItem.ValidationResult;
AssertBehaviorResults(parent, expectedParentResult);
}