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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.Web.Mvc;
using Microsoft.Web.UnitTestUtil;
using Moq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace Microsoft.Web.Mvc.ModelBinding.Test
{
public class SimpleModelBinderProviderTest
{
[Fact]
public void ConstructorWithFactoryThrowsIfModelBinderFactoryIsNull()
{
// Act & assert
Assert.ThrowsArgumentNull(
delegate { new SimpleModelBinderProvider(typeof(object), (Func<IExtensibleModelBinder>)null); }, "modelBinderFactory");
}
[Fact]
public void ConstructorWithFactoryThrowsIfModelTypeIsNull()
{
// Act & assert
Assert.ThrowsArgumentNull(
delegate { new SimpleModelBinderProvider(null, () => null); }, "modelType");
}
[Fact]
public void ConstructorWithInstanceThrowsIfModelBinderIsNull()
{
// Act & assert
Assert.ThrowsArgumentNull(
delegate { new SimpleModelBinderProvider(typeof(object), (IExtensibleModelBinder)null); }, "modelBinder");
}
[Fact]
public void ConstructorWithInstanceThrowsIfModelTypeIsNull()
{
// Act & assert
Assert.ThrowsArgumentNull(
delegate { new SimpleModelBinderProvider(null, new Mock<IExtensibleModelBinder>().Object); }, "modelType");
}
[Fact]
public void GetBinder_TypeDoesNotMatch_ReturnsNull()
{
// Arrange
SimpleModelBinderProvider provider = new SimpleModelBinderProvider(typeof(string), new Mock<IExtensibleModelBinder>().Object)
{
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;
SimpleModelBinderProvider provider = new SimpleModelBinderProvider(typeof(string), binderInstance);
ExtensibleModelBindingContext bindingContext = GetBindingContext(typeof(string));
bindingContext.ValueProvider = new SimpleValueProvider();
// Act
IExtensibleModelBinder returnedBinder = provider.GetBinder(null, bindingContext);
// Assert
Assert.Null(returnedBinder);
}
[Fact]
public void GetBinder_TypeMatches_PrefixSuppressed_ReturnsFactoryInstance()
{
// Arrange
int numExecutions = 0;
IExtensibleModelBinder theBinderInstance = new Mock<IExtensibleModelBinder>().Object;
Func<IExtensibleModelBinder> factory = delegate
{
numExecutions++;
return theBinderInstance;
};
SimpleModelBinderProvider provider = new SimpleModelBinderProvider(typeof(string), factory)
{
SuppressPrefixCheck = true
};
ExtensibleModelBindingContext bindingContext = GetBindingContext(typeof(string));
// Act
IExtensibleModelBinder returnedBinder = provider.GetBinder(null, bindingContext);
returnedBinder = provider.GetBinder(null, bindingContext);
// Assert
Assert.Equal(2, numExecutions);
Assert.Equal(theBinderInstance, returnedBinder);
}
[Fact]
public void GetBinder_TypeMatches_PrefixSuppressed_ReturnsInstance()
{
// Arrange
IExtensibleModelBinder theBinderInstance = new Mock<IExtensibleModelBinder>().Object;
SimpleModelBinderProvider provider = new SimpleModelBinderProvider(typeof(string), theBinderInstance)
{
SuppressPrefixCheck = true
};
ExtensibleModelBindingContext bindingContext = GetBindingContext(typeof(string));
// Act
IExtensibleModelBinder returnedBinder = provider.GetBinder(null, bindingContext);
// Assert
Assert.Equal(theBinderInstance, returnedBinder);
}
[Fact]
public void GetBinderThrowsIfBindingContextIsNull()
{
// Arrange
SimpleModelBinderProvider provider = new SimpleModelBinderProvider(typeof(string), new Mock<IExtensibleModelBinder>().Object);
// Act & assert
Assert.ThrowsArgumentNull(
delegate { provider.GetBinder(null, null); }, "bindingContext");
}
[Fact]
public void ModelTypeProperty()
{
// Arrange
SimpleModelBinderProvider provider = new SimpleModelBinderProvider(typeof(string), new Mock<IExtensibleModelBinder>().Object);
// Act & assert
Assert.Equal(typeof(string), provider.ModelType);
}
private static ExtensibleModelBindingContext GetBindingContext(Type modelType)
{
return new ExtensibleModelBindingContext
{
ModelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(() => null, modelType)
};
}
}
}
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