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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System;
using System.Collections.Generic;
using System.Web.Mvc;
using Microsoft.Web.UnitTestUtil;
using Moq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace Microsoft.Web.Mvc.ModelBinding.Test
{
public class GenericModelBinderProviderTest
{
[Fact]
public void Constructor_WithFactory_ThrowsIfModelBinderFactoryIsNull()
{
// Act & assert
Assert.ThrowsArgumentNull(
delegate { new GenericModelBinderProvider(typeof(List<>), (Func<Type[], IExtensibleModelBinder>)null); }, "modelBinderFactory");
}
[Fact]
public void Constructor_WithFactory_ThrowsIfModelTypeIsNotOpenGeneric()
{
// Act & assert
Assert.Throws<ArgumentException>(
delegate { new GenericModelBinderProvider(typeof(List<int>), _ => null); },
@"The type 'System.Collections.Generic.List`1[System.Int32]' is not an open generic type.
Parameter name: modelType");
}
[Fact]
public void Constructor_WithFactory_ThrowsIfModelTypeIsNull()
{
// Act & assert
Assert.ThrowsArgumentNull(
delegate { new GenericModelBinderProvider(null, _ => null); }, "modelType");
}
[Fact]
public void Constructor_WithInstance_ThrowsIfModelBinderIsNull()
{
// Act & assert
Assert.ThrowsArgumentNull(
delegate { new GenericModelBinderProvider(typeof(List<>), (IExtensibleModelBinder)null); }, "modelBinder");
}
[Fact]
public void Constructor_WithInstance_ThrowsIfModelTypeIsNotOpenGeneric()
{
// Act & assert
Assert.Throws<ArgumentException>(
delegate { new GenericModelBinderProvider(typeof(List<int>), new MutableObjectModelBinder()); },
@"The type 'System.Collections.Generic.List`1[System.Int32]' is not an open generic type.
Parameter name: modelType");
}
[Fact]
public void Constructor_WithInstance_ThrowsIfModelTypeIsNull()
{
// Act & assert
Assert.ThrowsArgumentNull(
delegate { new GenericModelBinderProvider(null, new MutableObjectModelBinder()); }, "modelType");
}
[Fact]
public void Constructor_WithType_ThrowsIfModelBinderTypeIsNotModelBinder()
{
// Act & assert
Assert.Throws<ArgumentException>(
delegate { new GenericModelBinderProvider(typeof(List<>), typeof(string)); },
@"The type 'System.String' does not implement the interface 'Microsoft.Web.Mvc.ModelBinding.IExtensibleModelBinder'.
Parameter name: modelBinderType");
}
[Fact]
public void Constructor_WithType_ThrowsIfModelBinderTypeIsNull()
{
// Act & assert
Assert.ThrowsArgumentNull(
delegate { new GenericModelBinderProvider(typeof(List<>), (Type)null); }, "modelBinderType");
}
[Fact]
public void Constructor_WithType_ThrowsIfModelBinderTypeTypeArgumentMismatch()
{
// Act & assert
Assert.Throws<ArgumentException>(
delegate { new GenericModelBinderProvider(typeof(List<>), typeof(DictionaryModelBinder<,>)); },
@"The open model type 'System.Collections.Generic.List`1[T]' has 1 generic type argument(s), but the open binder type 'Microsoft.Web.Mvc.ModelBinding.DictionaryModelBinder`2[TKey,TValue]' has 2 generic type argument(s). The binder type must not be an open generic type or must have the same number of generic arguments as the open model type.
Parameter name: modelBinderType");
}
[Fact]
public void Constructor_WithType_ThrowsIfModelTypeIsNotOpenGeneric()
{
// Act & assert
Assert.Throws<ArgumentException>(
delegate { new GenericModelBinderProvider(typeof(List<int>), typeof(MutableObjectModelBinder)); },
@"The type 'System.Collections.Generic.List`1[System.Int32]' is not an open generic type.
Parameter name: modelType");
}
[Fact]
public void Constructor_WithType_ThrowsIfModelTypeIsNull()
{
// Act & assert
Assert.ThrowsArgumentNull(
delegate { new GenericModelBinderProvider(null, typeof(MutableObjectModelBinder)); }, "modelType");
}
[Fact]
public void GetBinder_TypeDoesNotMatch_ModelTypeIsInterface_ReturnsNull()
{
// Arrange
GenericModelBinderProvider provider = new GenericModelBinderProvider(typeof(IEnumerable<>), typeof(CollectionModelBinder<>))
{
SuppressPrefixCheck = true
};
ExtensibleModelBindingContext bindingContext = GetBindingContext(typeof(object));
// Act
IExtensibleModelBinder binder = provider.GetBinder(null, bindingContext);
// Assert
Assert.Null(binder);
}
[Fact]
public void GetBinder_TypeDoesNotMatch_ModelTypeIsNotInterface_ReturnsNull()
{
// Arrange
GenericModelBinderProvider provider = new GenericModelBinderProvider(typeof(List<>), typeof(CollectionModelBinder<>))
{
SuppressPrefixCheck = true
};
ExtensibleModelBindingContext bindingContext = GetBindingContext(typeof(object));
// Act
IExtensibleModelBinder binder = provider.GetBinder(null, bindingContext);
// Assert
Assert.Null(binder);
}
[Fact]
public void GetBinder_TypeMatches_PrefixNotFound_ReturnsNull()
{
// Arrange
IExtensibleModelBinder binderInstance = new Mock<IExtensibleModelBinder>().Object;
GenericModelBinderProvider provider = new GenericModelBinderProvider(typeof(List<>), binderInstance);
ExtensibleModelBindingContext bindingContext = GetBindingContext(typeof(List<int>));
bindingContext.ValueProvider = new SimpleValueProvider();
// Act
IExtensibleModelBinder returnedBinder = provider.GetBinder(null, bindingContext);
// Assert
Assert.Null(returnedBinder);
}
[Fact]
public void GetBinder_TypeMatches_Success_Factory_ReturnsBinder()
{
// Arrange
IExtensibleModelBinder binderInstance = new Mock<IExtensibleModelBinder>().Object;
Func<Type[], IExtensibleModelBinder> binderFactory = typeArguments =>
{
Assert.Equal(new[] { typeof(int) }, typeArguments);
return binderInstance;
};
GenericModelBinderProvider provider = new GenericModelBinderProvider(typeof(IList<>), binderFactory)
{
SuppressPrefixCheck = true
};
ExtensibleModelBindingContext bindingContext = GetBindingContext(typeof(List<int>));
// Act
IExtensibleModelBinder returnedBinder = provider.GetBinder(null, bindingContext);
// Assert
Assert.Same(binderInstance, returnedBinder);
}
[Fact]
public void GetBinder_TypeMatches_Success_Instance_ReturnsBinder()
{
// Arrange
IExtensibleModelBinder binderInstance = new Mock<IExtensibleModelBinder>().Object;
GenericModelBinderProvider provider = new GenericModelBinderProvider(typeof(List<>), binderInstance)
{
SuppressPrefixCheck = true
};
ExtensibleModelBindingContext bindingContext = GetBindingContext(typeof(List<int>));
// Act
IExtensibleModelBinder returnedBinder = provider.GetBinder(null, bindingContext);
// Assert
Assert.Same(binderInstance, returnedBinder);
}
[Fact]
public void GetBinder_TypeMatches_Success_TypeActivation_ReturnsBinder()
{
// Arrange
GenericModelBinderProvider provider = new GenericModelBinderProvider(typeof(List<>), typeof(CollectionModelBinder<>))
{
SuppressPrefixCheck = true
};
ExtensibleModelBindingContext bindingContext = GetBindingContext(typeof(List<int>));
// Act
IExtensibleModelBinder returnedBinder = provider.GetBinder(null, bindingContext);
// Assert
Assert.IsType<CollectionModelBinder<int>>(returnedBinder);
}
[Fact]
public void GetBinderThrowsIfBindingContextIsNull()
{
// Arrange
GenericModelBinderProvider provider = new GenericModelBinderProvider(typeof(IEnumerable<>), typeof(CollectionModelBinder<>));
// Act & assert
Assert.ThrowsArgumentNull(
delegate { provider.GetBinder(null, null); }, "bindingContext");
}
private static ExtensibleModelBindingContext GetBindingContext(Type modelType)
{
return new ExtensibleModelBindingContext
{
ModelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(() => null, modelType)
};
}
}
}
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