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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Mvc.Test
{
public class ModelBinderAttributeTest
{
[Fact]
public void ConstructorWithInvalidBinderTypeThrows()
{
// Arrange
Type badType = typeof(string);
// Act & Assert
Assert.Throws<ArgumentException>(
delegate { new ModelBinderAttribute(badType); },
"The type 'System.String' does not implement the IModelBinder interface.\r\nParameter name: binderType");
}
[Fact]
public void ConstructorWithNullBinderTypeThrows()
{
// Act & Assert
Assert.ThrowsArgumentNull(
delegate { new ModelBinderAttribute(null); }, "binderType");
}
[Fact]
public void BinderTypeProperty()
{
// Arrange
Type binderType = typeof(GoodConverter);
ModelBinderAttribute attr = new ModelBinderAttribute(binderType);
// Act & Assert
Assert.Same(binderType, attr.BinderType);
}
[Fact]
public void GetBinder()
{
// Arrange
ModelBinderAttribute attr = new ModelBinderAttribute(typeof(GoodConverter));
// Act
IModelBinder binder = attr.GetBinder();
// Assert
Assert.IsType<GoodConverter>(binder);
}
[Fact]
public void GetBinderWithBadConstructorThrows()
{
// Arrange
ModelBinderAttribute attr = new ModelBinderAttribute(typeof(BadConverter));
// Act & Assert
Assert.Throws<InvalidOperationException>(
delegate { attr.GetBinder(); },
"An error occurred when trying to create the IModelBinder 'System.Web.Mvc.Test.ModelBinderAttributeTest+BadConverter'. Make sure that the binder has a public parameterless constructor.");
}
private class GoodConverter : IModelBinder
{
public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
throw new NotImplementedException();
}
}
private class BadConverter : IModelBinder
{
// no public parameterless constructor
public BadConverter(string s)
{
}
public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
throw new NotImplementedException();
}
}
}
}
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