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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Mvc.Test
{
public class DataErrorInfoModelValidatorProviderTest
{
private static readonly EmptyModelMetadataProvider _metadataProvider = new EmptyModelMetadataProvider();
[Fact]
public void GetValidatorsReturnsEmptyCollectionIfTypeNotIDataErrorInfo()
{
// Arrange
DataErrorInfoModelValidatorProvider validatorProvider = new DataErrorInfoModelValidatorProvider();
object model = new object();
ModelMetadata metadata = _metadataProvider.GetMetadataForType(() => model, typeof(object));
// Act
ModelValidator[] validators = validatorProvider.GetValidators(metadata, new ControllerContext()).ToArray();
// Assert
Assert.Empty(validators);
}
[Fact]
public void GetValidatorsReturnsValidatorForIDataErrorInfoProperty()
{
// Arrange
DataErrorInfoModelValidatorProvider validatorProvider = new DataErrorInfoModelValidatorProvider();
DataErrorInfo1 model = new DataErrorInfo1();
ModelMetadata metadata = _metadataProvider.GetMetadataForProperty(() => model, typeof(DataErrorInfo1), "SomeStringProperty");
Type[] expectedTypes = new Type[]
{
typeof(DataErrorInfoModelValidatorProvider.DataErrorInfoPropertyModelValidator)
};
// Act
Type[] actualTypes = validatorProvider.GetValidators(metadata, new ControllerContext()).Select(v => v.GetType()).ToArray();
// Assert
Assert.Equal(expectedTypes, actualTypes);
}
[Fact]
public void GetValidatorsReturnsValidatorForIDataErrorInfoRootType()
{
// Arrange
DataErrorInfoModelValidatorProvider validatorProvider = new DataErrorInfoModelValidatorProvider();
DataErrorInfo1 model = new DataErrorInfo1();
ModelMetadata metadata = _metadataProvider.GetMetadataForType(() => model, typeof(DataErrorInfo1));
Type[] expectedTypes = new Type[]
{
typeof(DataErrorInfoModelValidatorProvider.DataErrorInfoClassModelValidator)
};
// Act
Type[] actualTypes = validatorProvider.GetValidators(metadata, new ControllerContext()).Select(v => v.GetType()).ToArray();
// Assert
Assert.Equal(expectedTypes, actualTypes);
}
[Fact]
public void GetValidatorsThrowsIfContextIsNull()
{
// Arrange
DataErrorInfoModelValidatorProvider validatorProvider = new DataErrorInfoModelValidatorProvider();
ModelMetadata metadata = _metadataProvider.GetMetadataForType(null, typeof(DataErrorInfo1));
// Act & assert
Assert.ThrowsArgumentNull(
delegate { validatorProvider.GetValidators(metadata, null); }, "context");
}
[Fact]
public void GetValidatorsThrowsIfMetadataIsNull()
{
// Arrange
DataErrorInfoModelValidatorProvider validatorProvider = new DataErrorInfoModelValidatorProvider();
// Act & assert
Assert.ThrowsArgumentNull(
delegate { validatorProvider.GetValidators(null, new ControllerContext()); }, "metadata");
}
[Fact]
public void ClassValidator_Validate_IDataErrorInfoModelWithError()
{
// Arrange
DataErrorInfo1 model = new DataErrorInfo1()
{
Error = "This is an error message."
};
ModelMetadata metadata = _metadataProvider.GetMetadataForType(() => model, typeof(DataErrorInfo1));
var validator = new DataErrorInfoModelValidatorProvider.DataErrorInfoClassModelValidator(metadata, new ControllerContext());
// Act
ModelValidationResult[] result = validator.Validate(null).ToArray();
// Assert
ModelValidationResult modelValidationResult = Assert.Single(result);
Assert.Equal("This is an error message.", modelValidationResult.Message);
}
[Fact]
public void ClassValidator_Validate_IDataErrorInfoModelWithNoErrorReturnsEmptyResults()
{
// Arrange
DataErrorInfo1 model = new DataErrorInfo1();
ModelMetadata metadata = _metadataProvider.GetMetadataForType(() => model, typeof(DataErrorInfo1));
var validator = new DataErrorInfoModelValidatorProvider.DataErrorInfoClassModelValidator(metadata, new ControllerContext());
// Act
ModelValidationResult[] result = validator.Validate(null).ToArray();
// Assert
Assert.Empty(result);
}
[Fact]
public void ClassValidator_Validate_NonIDataErrorInfoModelReturnsEmptyResults()
{
// Arrange
object model = new object();
ModelMetadata metadata = _metadataProvider.GetMetadataForType(() => model, typeof(object));
var validator = new DataErrorInfoModelValidatorProvider.DataErrorInfoClassModelValidator(metadata, new ControllerContext());
// Act
ModelValidationResult[] result = validator.Validate(null).ToArray();
// Assert
Assert.Empty(result);
}
[Fact]
public void PropertyValidator_Validate_IDataErrorInfoSkipsErrorProperty()
{
// Arrange
DataErrorInfo1 container = new DataErrorInfo1();
container["Error"] = "This should never be shown.";
ModelMetadata metadata = _metadataProvider.GetMetadataForProperty(() => container, typeof(DataErrorInfo1), "Error");
var validator = new DataErrorInfoModelValidatorProvider.DataErrorInfoPropertyModelValidator(metadata, new ControllerContext());
// Act
ModelValidationResult[] result = validator.Validate(container).ToArray();
// Assert
Assert.Empty(result);
}
[Fact]
public void PropertyValidator_Validate_DoesNotReadPropertyValue()
{
// Arrange
ObservableModel model = new ObservableModel();
ModelMetadata metadata = _metadataProvider.GetMetadataForProperty(() => model.TheProperty, typeof(ObservableModel), "TheProperty");
ControllerContext controllerContext = new ControllerContext();
// Act
ModelValidator[] validators = new DataErrorInfoModelValidatorProvider().GetValidators(metadata, controllerContext).ToArray();
ModelValidationResult[] results = validators.SelectMany(o => o.Validate(model)).ToArray();
// Assert
Assert.Equal(new[] { typeof(DataErrorInfoModelValidatorProvider.DataErrorInfoPropertyModelValidator) }, Array.ConvertAll(validators, o => o.GetType()));
Assert.Equal(new[] { "TheProperty" }, model.GetColumnNamesPassed().ToArray());
Assert.Empty(results);
Assert.False(model.PropertyWasRead());
}
[Fact]
public void PropertyValidator_Validate_IDataErrorInfoContainerWithError()
{
// Arrange
DataErrorInfo1 container = new DataErrorInfo1();
container["SomeStringProperty"] = "This is an error message.";
ModelMetadata metadata = _metadataProvider.GetMetadataForProperty(() => container, typeof(DataErrorInfo1), "SomeStringProperty");
var validator = new DataErrorInfoModelValidatorProvider.DataErrorInfoPropertyModelValidator(metadata, new ControllerContext());
// Act
ModelValidationResult[] result = validator.Validate(container).ToArray();
// Assert
ModelValidationResult modelValidationResult = Assert.Single(result);
Assert.Equal("This is an error message.", modelValidationResult.Message);
}
[Fact]
public void PropertyValidator_Validate_IDataErrorInfoContainerWithNoErrorReturnsEmptyResults()
{
// Arrange
DataErrorInfo1 container = new DataErrorInfo1();
ModelMetadata metadata = _metadataProvider.GetMetadataForProperty(() => container, typeof(DataErrorInfo1), "SomeStringProperty");
var validator = new DataErrorInfoModelValidatorProvider.DataErrorInfoPropertyModelValidator(metadata, new ControllerContext());
// Act
ModelValidationResult[] result = validator.Validate(container).ToArray();
// Assert
Assert.Empty(result);
}
[Fact]
public void PropertyValidator_Validate_NonIDataErrorInfoContainerReturnsEmptyResults()
{
// Arrange
DataErrorInfo1 container = new DataErrorInfo1();
container["SomeStringProperty"] = "This is an error message.";
ModelMetadata metadata = _metadataProvider.GetMetadataForProperty(() => container, typeof(DataErrorInfo1), "SomeStringProperty");
var validator = new DataErrorInfoModelValidatorProvider.DataErrorInfoPropertyModelValidator(metadata, new ControllerContext());
// Act
ModelValidationResult[] result = validator.Validate(new object()).ToArray();
// Assert
Assert.Empty(result);
}
private class DataErrorInfo1 : IDataErrorInfo
{
private readonly Dictionary<string, string> _errors = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
public string SomeStringProperty { get; set; }
public string Error { get; set; }
public string this[string columnName]
{
get
{
string outVal;
_errors.TryGetValue(columnName, out outVal);
return outVal;
}
set { _errors[columnName] = value; }
}
}
private class ObservableModel : IDataErrorInfo
{
private bool _propertyWasRead;
private readonly List<string> _columnNamesPassed = new List<string>();
public int TheProperty
{
get
{
_propertyWasRead = true;
return 42;
}
}
public bool PropertyWasRead()
{
return _propertyWasRead;
}
public string Error
{
get { throw new NotImplementedException(); }
}
public string this[string columnName]
{
get
{
_columnNamesPassed.Add(columnName);
return null;
}
}
public List<string> GetColumnNamesPassed()
{
return _columnNamesPassed;
}
}
}
}
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