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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Web.TestUtil;
using Moq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Mvc.Test
{
public class ModelBinderDictionaryTest
{
[Fact]
public void DefaultBinderIsInstanceOfDefaultModelBinder()
{
// Arrange
ModelBinderDictionary binders = new ModelBinderDictionary();
// Act
IModelBinder defaultBinder = binders.DefaultBinder;
// Assert
Assert.IsType<DefaultModelBinder>(defaultBinder);
}
[Fact]
public void DefaultBinderProperty()
{
// Arrange
ModelBinderDictionary binders = new ModelBinderDictionary();
IModelBinder binder = new Mock<IModelBinder>().Object;
// Act & assert
MemberHelper.TestPropertyWithDefaultInstance(binders, "DefaultBinder", binder);
}
[Fact]
public void DictionaryInterface()
{
// Arrange
DictionaryHelper<Type, IModelBinder> helper = new DictionaryHelper<Type, IModelBinder>()
{
Creator = () => new ModelBinderDictionary(),
SampleKeys = new Type[] { typeof(object), typeof(string), typeof(int), typeof(long), typeof(long) },
SampleValues = new IModelBinder[] { new DefaultModelBinder(), new DefaultModelBinder(), new DefaultModelBinder(), new DefaultModelBinder(), new DefaultModelBinder() },
ThrowOnKeyNotFound = false
};
// Act & assert
helper.Execute();
}
[Fact]
public void GetBinderConsultsProviders()
{
// Arrange
Type modelType = typeof(string);
IModelBinder expectedBinderFromProvider = new Mock<IModelBinder>().Object;
Mock<IModelBinderProvider> locatedProvider = new Mock<IModelBinderProvider>();
locatedProvider.Setup(p => p.GetBinder(modelType))
.Returns(expectedBinderFromProvider);
Mock<IModelBinderProvider> secondProvider = new Mock<IModelBinderProvider>();
ModelBinderProviderCollection providers = new ModelBinderProviderCollection(new IModelBinderProvider[] { locatedProvider.Object, secondProvider.Object });
ModelBinderDictionary binders = new ModelBinderDictionary(providers);
// Act
IModelBinder returnedBinder = binders.GetBinder(modelType);
// Assert
Assert.Same(expectedBinderFromProvider, returnedBinder);
}
[Fact]
public void GetBinderDoesNotReturnDefaultBinderIfAskedNotTo()
{
// Proper order of precedence:
// 1. Binder registered in the global table
// 2. Binder attribute defined on the type
// 3. <null>
// Arrange
IModelBinder registeredFirstBinder = new Mock<IModelBinder>().Object;
ModelBinderDictionary binders = new ModelBinderDictionary()
{
{ typeof(MyFirstConvertibleType), registeredFirstBinder }
};
// Act
IModelBinder binder1 = binders.GetBinder(typeof(MyFirstConvertibleType), false /* fallbackToDefault */);
IModelBinder binder2 = binders.GetBinder(typeof(MySecondConvertibleType), false /* fallbackToDefault */);
IModelBinder binder3 = binders.GetBinder(typeof(object), false /* fallbackToDefault */);
// Assert
Assert.Same(registeredFirstBinder, binder1);
Assert.IsType<MySecondBinder>(binder2);
Assert.Null(binder3);
}
[Fact]
public void GetBinderResolvesBindersWithCorrectPrecedence()
{
// Proper order of precedence:
// 1. Binder registered in the global table
// 2. Binder attribute defined on the type
// 3. Default binder
// Arrange
IModelBinder registeredFirstBinder = new Mock<IModelBinder>().Object;
ModelBinderDictionary binders = new ModelBinderDictionary()
{
{ typeof(MyFirstConvertibleType), registeredFirstBinder }
};
IModelBinder defaultBinder = new Mock<IModelBinder>().Object;
binders.DefaultBinder = defaultBinder;
// Act
IModelBinder binder1 = binders.GetBinder(typeof(MyFirstConvertibleType));
IModelBinder binder2 = binders.GetBinder(typeof(MySecondConvertibleType));
IModelBinder binder3 = binders.GetBinder(typeof(object));
// Assert
Assert.Same(registeredFirstBinder, binder1);
Assert.IsType<MySecondBinder>(binder2);
Assert.Same(defaultBinder, binder3);
}
[Fact]
public void GetBinderThrowsIfModelTypeContainsMultipleAttributes()
{
// Arrange
ModelBinderDictionary binders = new ModelBinderDictionary();
// Act & Assert
Assert.Throws<InvalidOperationException>(
delegate { binders.GetBinder(typeof(ConvertibleTypeWithSeveralBinders), true /* fallbackToDefault */); },
"The type 'System.Web.Mvc.Test.ModelBinderDictionaryTest+ConvertibleTypeWithSeveralBinders' contains multiple attributes that inherit from CustomModelBinderAttribute.");
}
[Fact]
public void GetBinderThrowsIfModelTypeIsNull()
{
// Arrange
ModelBinderDictionary binders = new ModelBinderDictionary();
// Act & Assert
Assert.ThrowsArgumentNull(
delegate { binders.GetBinder(null); }, "modelType");
}
[ModelBinder(typeof(MyFirstBinder))]
private class MyFirstConvertibleType
{
}
private class MyFirstBinder : IModelBinder
{
public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
throw new NotImplementedException();
}
}
[ModelBinder(typeof(MySecondBinder))]
private class MySecondConvertibleType
{
}
private class MySecondBinder : IModelBinder
{
public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
throw new NotImplementedException();
}
}
[ModelBinder(typeof(MySecondBinder))]
[MySubclassedBinder]
private class ConvertibleTypeWithSeveralBinders
{
}
private class MySubclassedBinderAttribute : CustomModelBinderAttribute
{
public override IModelBinder GetBinder()
{
throw new NotImplementedException();
}
}
}
}
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