public void NotifiesValidationStateChangedAfterObjectValidation()
{
// Arrange
var model = new TestModel {
IntFrom1To100 = 101
};
var editContext = new EditContext(model);
editContext.EnableDataAnnotationsValidation();
var onValidationStateChangedCount = 0;
editContext.OnValidationStateChanged += (sender, eventArgs) => onValidationStateChangedCount++;
// Act/Assert 1: Notifies after invalid results
Assert.False(editContext.Validate());
Assert.Equal(1, onValidationStateChangedCount);
// Act/Assert 2: Notifies after valid results
model.RequiredString = "Hello";
model.IntFrom1To100 = 100;
Assert.True(editContext.Validate());
Assert.Equal(2, onValidationStateChangedCount);
// Act/Assert 3: Notifies even if results haven't changed. Later we might change the
// logic to track the previous results and compare with the new ones, but that's just
// an optimization. It's legal to notify regardless.
Assert.True(editContext.Validate());
Assert.Equal(3, onValidationStateChangedCount);
}
public void GetsValidationMessagesFromDataAnnotations()
{
// Arrange
var model = new TestModel {
IntFrom1To100 = 101
};
var editContext = new EditContext(model);
editContext.EnableDataAnnotationsValidation();
// Act
var isValid = editContext.Validate();
// Assert
Assert.False(isValid);
Assert.Equal(new string[]
{
"RequiredString:required",
"IntFrom1To100:range"
},
editContext.GetValidationMessages());
Assert.Equal(new string[] { "RequiredString:required" },
editContext.GetValidationMessages(editContext.Field(nameof(TestModel.RequiredString))));
// This shows we're including non-[Required] properties in the validation results, i.e,
// that we're correctly passing "validateAllProperties: true" to DataAnnotations
Assert.Equal(new string[] { "IntFrom1To100:range" },
editContext.GetValidationMessages(editContext.Field(nameof(TestModel.IntFrom1To100))));
}
public void ClearsExistingValidationMessagesOnFurtherRuns()
{
// Arrange
var model = new TestModel {
IntFrom1To100 = 101
};
var editContext = new EditContext(model);
editContext.EnableDataAnnotationsValidation();
// Act/Assert 1: Initially invalid
Assert.False(editContext.Validate());
// Act/Assert 2: Can become valid
model.RequiredString = "Hello";
model.IntFrom1To100 = 100;
Assert.True(editContext.Validate());
}
public void CanDetachFromEditContext()
{
// Arrange
var model = new TestModel {
IntFrom1To100 = 101
};
var editContext = new EditContext(model);
var subscription = editContext.EnableDataAnnotationsValidation();
// Act/Assert 1: when we're attached
Assert.False(editContext.Validate());
Assert.NotEmpty(editContext.GetValidationMessages());
// Act/Assert 2: when we're detached
subscription.Dispose();
Assert.True(editContext.Validate());
Assert.Empty(editContext.GetValidationMessages());
}
public void IgnoresFieldChangesThatDoNotCorrespondToAValidatableProperty(string fieldName)
{
// Arrange
var editContext = new EditContext(new TestModel());
editContext.EnableDataAnnotationsValidation();
var onValidationStateChangedCount = 0;
editContext.OnValidationStateChanged += (sender, eventArgs) => onValidationStateChangedCount++;
// Act/Assert: Ignores field changes that don't correspond to a validatable property
editContext.NotifyFieldChanged(editContext.Field(fieldName));
Assert.Equal(0, onValidationStateChangedCount);
// Act/Assert: For sanity, observe that we would have validated if it was a validatable property
editContext.NotifyFieldChanged(editContext.Field(nameof(TestModel.RequiredString)));
Assert.Equal(1, onValidationStateChangedCount);
}
public void PerformsPerPropertyValidationOnFieldChange()
{
// Arrange
var model = new TestModel {
IntFrom1To100 = 101
};
var independentTopLevelModel = new object(); // To show we can validate things on any model, not just the top-level one
var editContext = new EditContext(independentTopLevelModel);
editContext.EnableDataAnnotationsValidation();
var onValidationStateChangedCount = 0;
var requiredStringIdentifier = new FieldIdentifier(model, nameof(TestModel.RequiredString));
var intFrom1To100Identifier = new FieldIdentifier(model, nameof(TestModel.IntFrom1To100));
editContext.OnValidationStateChanged += (sender, eventArgs) => onValidationStateChangedCount++;
// Act/Assert 1: Notify about RequiredString
// Only RequiredString gets validated, even though IntFrom1To100 also holds an invalid value
editContext.NotifyFieldChanged(requiredStringIdentifier);
Assert.Equal(1, onValidationStateChangedCount);
Assert.Equal(new[] { "RequiredString:required" }, editContext.GetValidationMessages());
// Act/Assert 2: Fix RequiredString, but only notify about IntFrom1To100
// Only IntFrom1To100 gets validated; messages for RequiredString are left unchanged
model.RequiredString = "This string is very cool and very legal";
editContext.NotifyFieldChanged(intFrom1To100Identifier);
Assert.Equal(2, onValidationStateChangedCount);
Assert.Equal(new string[]
{
"RequiredString:required",
"IntFrom1To100:range"
},
editContext.GetValidationMessages());
// Act/Assert 3: Notify about RequiredString
editContext.NotifyFieldChanged(requiredStringIdentifier);
Assert.Equal(3, onValidationStateChangedCount);
Assert.Equal(new[] { "IntFrom1To100:range" }, editContext.GetValidationMessages());
}