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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.Linq;
using System.Web.Http.Metadata;
using System.Web.Http.Metadata.Providers;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Http.Validation
{
public class ModelValidatorTest
{
private static CachedDataAnnotationsModelMetadataProvider _metadataProvider = new CachedDataAnnotationsModelMetadataProvider();
private static IEnumerable<ModelValidatorProvider> _noValidatorProviders = Enumerable.Empty<ModelValidatorProvider>();
[Fact]
public void ConstructorGuards()
{
// Arrange
ModelMetadata metadata = _metadataProvider.GetMetadataForType(null, typeof(object));
// Act & Assert
Assert.ThrowsArgumentNull(
() => new TestableModelValidator(metadata: null, validatorProviders: _noValidatorProviders),
"metadata");
Assert.ThrowsArgumentNull(
() => new TestableModelValidator(metadata, validatorProviders: null),
"validatorProviders");
}
[Fact]
public void ValuesSet()
{
// Arrange
ModelMetadata metadata = _metadataProvider.GetMetadataForProperty(() => 15, typeof(string), "Length");
// Act
TestableModelValidator validator = new TestableModelValidator(metadata, _noValidatorProviders);
// Assert
Assert.Same(metadata, validator.Metadata);
Assert.Same(_noValidatorProviders, validator.ValidatorProviders);
}
[Fact]
public void IsRequiredFalseByDefault()
{
// Arrange
ModelMetadata metadata = _metadataProvider.GetMetadataForProperty(() => 15, typeof(string), "Length");
// Act
TestableModelValidator validator = new TestableModelValidator(metadata, _noValidatorProviders);
// Assert
Assert.False(validator.IsRequired);
}
[Fact]
public void GetModelValidator_DoesNotReadPropertyValues()
{
// Arrange
IEnumerable<ModelValidatorProvider> validatorProviders = new[] { new ObservableModelValidatorProvider() };
ObservableModel model = new ObservableModel();
ModelMetadata metadata = new EmptyModelMetadataProvider().GetMetadataForType(() => model, typeof(ObservableModel));
// Act
ModelValidator validator = ModelValidator.GetModelValidator(metadata, validatorProviders);
ModelValidationResult[] results = validator.Validate(model).ToArray();
// Assert
Assert.False(model.PropertyWasRead());
}
private class ObservableModelValidatorProvider : ModelValidatorProvider
{
public override IEnumerable<ModelValidator> GetValidators(ModelMetadata metadata, IEnumerable<ModelValidatorProvider> validatorProviders)
{
return new ModelValidator[] { new ObservableModelValidator(metadata, validatorProviders) };
}
private class ObservableModelValidator : ModelValidator
{
public ObservableModelValidator(ModelMetadata metadata, IEnumerable<ModelValidatorProvider> validatorProviders)
: base(metadata, validatorProviders)
{
}
public override IEnumerable<ModelValidationResult> Validate(object container)
{
return Enumerable.Empty<ModelValidationResult>();
}
}
}
private class ObservableModel
{
private bool _propertyWasRead;
public int TheProperty
{
get
{
_propertyWasRead = true;
return 42;
}
}
public bool PropertyWasRead()
{
return _propertyWasRead;
}
}
private class TestableModelValidator : ModelValidator
{
public TestableModelValidator(ModelMetadata metadata, IEnumerable<ModelValidatorProvider> validatorProviders)
: base(metadata, validatorProviders)
{
}
public override IEnumerable<ModelValidationResult> Validate(object container)
{
throw new NotImplementedException();
}
}
}
}
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