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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.ComponentModel;
using System.Linq;
using System.Web.Routing;
using System.Web.TestUtil;
using Moq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Mvc.Test
{
public class HandleErrorAttributeTest
{
[Fact]
public void HandleErrorAttributeReturnsUniqueTypeIDs()
{
// Arrange
HandleErrorAttribute attr1 = new HandleErrorAttribute();
HandleErrorAttribute attr2 = new HandleErrorAttribute();
// Assert
Assert.NotEqual(attr1.TypeId, attr2.TypeId);
}
[HandleError(View = "foo")]
[HandleError(View = "bar")]
private class ClassWithMultipleHandleErrorAttributes
{
}
[Fact]
public void CanRetrieveMultipleAuthorizeAttributesFromOneClass()
{
// Arrange
ClassWithMultipleHandleErrorAttributes @class = new ClassWithMultipleHandleErrorAttributes();
// Act
IEnumerable<HandleErrorAttribute> attributes = TypeDescriptor.GetAttributes(@class).OfType<HandleErrorAttribute>();
// Assert
Assert.Equal(2, attributes.Count());
Assert.True(attributes.Any(a => a.View == "foo"));
Assert.True(attributes.Any(a => a.View == "bar"));
}
[Fact]
public void ExceptionTypeProperty()
{
// Arrange
HandleErrorAttribute attr = new HandleErrorAttribute();
// Act
Type origType = attr.ExceptionType;
attr.ExceptionType = typeof(SystemException);
Type newType = attr.ExceptionType;
// Assert
Assert.Equal(typeof(Exception), origType);
Assert.Equal(typeof(SystemException), attr.ExceptionType);
}
[Fact]
public void ExceptionTypePropertyWithNonExceptionTypeThrows()
{
// Arrange
HandleErrorAttribute attr = new HandleErrorAttribute();
// Act & Assert
Assert.Throws<ArgumentException>(
delegate { attr.ExceptionType = typeof(string); },
"The type 'System.String' does not inherit from Exception.");
}
[Fact]
public void ExceptionTypePropertyWithNullValueThrows()
{
// Arrange
HandleErrorAttribute attr = new HandleErrorAttribute();
// Act & Assert
Assert.ThrowsArgumentNull(
delegate { attr.ExceptionType = null; }, "value");
}
[Fact]
public void MasterProperty()
{
// Arrange
HandleErrorAttribute attr = new HandleErrorAttribute();
// Act & Assert
MemberHelper.TestStringProperty(attr, "Master", String.Empty);
}
[Fact]
public void OnException()
{
// Arrange
HandleErrorAttribute attr = new HandleErrorAttribute()
{
View = "SomeView",
Master = "SomeMaster",
ExceptionType = typeof(ArgumentException)
};
Exception exception = new ArgumentNullException();
Mock<HttpContextBase> mockHttpContext = new Mock<HttpContextBase>(MockBehavior.Strict);
mockHttpContext.Setup(c => c.IsCustomErrorEnabled).Returns(true);
mockHttpContext.Setup(c => c.Session).Returns((HttpSessionStateBase)null);
mockHttpContext.Setup(c => c.Response.Clear()).Verifiable();
mockHttpContext.SetupSet(c => c.Response.StatusCode = 500).Verifiable();
mockHttpContext.SetupSet(c => c.Response.TrySkipIisCustomErrors = true).Verifiable();
TempDataDictionary tempData = new TempDataDictionary();
IViewEngine viewEngine = new Mock<IViewEngine>().Object;
Controller controller = new Mock<Controller>().Object;
controller.TempData = tempData;
ExceptionContext context = GetExceptionContext(mockHttpContext.Object, controller, exception);
// Exception
attr.OnException(context);
// Assert
mockHttpContext.Verify();
ViewResult viewResult = context.Result as ViewResult;
Assert.NotNull(viewResult);
Assert.Equal(tempData, viewResult.TempData);
Assert.Equal("SomeView", viewResult.ViewName);
Assert.Equal("SomeMaster", viewResult.MasterName);
HandleErrorInfo viewData = viewResult.ViewData.Model as HandleErrorInfo;
Assert.NotNull(viewData);
Assert.Same(exception, viewData.Exception);
Assert.Equal("SomeController", viewData.ControllerName);
Assert.Equal("SomeAction", viewData.ActionName);
}
[Fact]
public void OnExceptionWithCustomErrorsDisabledDoesNothing()
{
// Arrange
HandleErrorAttribute attr = new HandleErrorAttribute();
ActionResult result = new EmptyResult();
ExceptionContext context = GetExceptionContext(GetHttpContext(false), null, new Exception());
context.Result = result;
// Exception
attr.OnException(context);
// Assert
Assert.Same(result, context.Result);
}
[Fact]
public void OnExceptionWithExceptionHandledDoesNothing()
{
// Arrange
HandleErrorAttribute attr = new HandleErrorAttribute();
ActionResult result = new EmptyResult();
ExceptionContext context = GetExceptionContext(GetHttpContext(), null, new Exception());
context.Result = result;
context.ExceptionHandled = true;
// Exception
attr.OnException(context);
// Assert
Assert.Same(result, context.Result);
}
[Fact]
public void OnExceptionWithNon500ExceptionDoesNothing()
{
// Arrange
HandleErrorAttribute attr = new HandleErrorAttribute();
ActionResult result = new EmptyResult();
ExceptionContext context = GetExceptionContext(GetHttpContext(), null, new HttpException(404, "Some Exception"));
context.Result = result;
// Exception
attr.OnException(context);
// Assert
Assert.Same(result, context.Result);
}
[Fact]
public void OnExceptionWithNullFilterContextThrows()
{
// Arrange
HandleErrorAttribute attr = new HandleErrorAttribute();
// Act & Assert
Assert.ThrowsArgumentNull(
delegate { attr.OnException(null /* filterContext */); }, "filterContext");
}
[Fact]
public void OnExceptionWithWrongExceptionTypeDoesNothing()
{
// Arrange
HandleErrorAttribute attr = new HandleErrorAttribute() { ExceptionType = typeof(ArgumentException) };
ActionResult result = new EmptyResult();
ExceptionContext context = GetExceptionContext(GetHttpContext(), null, new InvalidCastException());
context.Result = result;
// Exception
attr.OnException(context);
// Assert
Assert.Same(result, context.Result);
}
[Fact]
public void ViewProperty()
{
// Arrange
HandleErrorAttribute attr = new HandleErrorAttribute();
// Act & Assert
MemberHelper.TestStringProperty(attr, "View", "Error", nullAndEmptyReturnValue: "Error");
}
private static ExceptionContext GetExceptionContext(HttpContextBase httpContext, ControllerBase controller, Exception exception)
{
RouteData rd = new RouteData();
rd.Values["controller"] = "SomeController";
rd.Values["action"] = "SomeAction";
Mock<ExceptionContext> mockExceptionContext = new Mock<ExceptionContext>();
mockExceptionContext.Setup(c => c.Controller).Returns(controller);
mockExceptionContext.Setup(c => c.Exception).Returns(exception);
mockExceptionContext.Setup(c => c.RouteData).Returns(rd);
mockExceptionContext.Setup(c => c.HttpContext).Returns(httpContext);
return mockExceptionContext.Object;
}
private static HttpContextBase GetHttpContext()
{
return GetHttpContext(true);
}
private static HttpContextBase GetHttpContext(bool isCustomErrorEnabled)
{
Mock<HttpContextBase> mockContext = new Mock<HttpContextBase>(MockBehavior.Strict);
mockContext.Setup(c => c.IsCustomErrorEnabled).Returns(isCustomErrorEnabled);
return mockContext.Object;
}
}
}
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