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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.IO;
using System.Web.UI;
using Moq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Mvc.Test
{
public class ViewPageTest
{
[Fact]
public void ModelProperty()
{
// Arrange
object model = new object();
ViewDataDictionary viewData = new ViewDataDictionary(model);
ViewPage viewPage = new ViewPage();
viewPage.ViewData = viewData;
// Act
object viewPageModel = viewPage.Model;
// Assert
Assert.Equal(model, viewPageModel);
Assert.Equal(model, viewPage.ViewData.Model);
}
[Fact]
public void ModelPropertyStronglyTypedViewPage()
{
// Arrange
FooModel model = new FooModel();
ViewDataDictionary<FooModel> viewData = new ViewDataDictionary<FooModel>(model);
ViewPage<FooModel> viewPage = new ViewPage<FooModel>();
viewPage.ViewData = viewData;
// Act
object viewPageModelObject = ((ViewPage)viewPage).Model;
FooModel viewPageModelPerson = viewPage.Model;
// Assert
Assert.Equal(model, viewPageModelObject);
Assert.Equal(model, viewPageModelPerson);
}
[Fact]
public void SetViewItemOnBaseClassPropagatesToDerivedClass()
{
// Arrange
ViewPage<object> vpInt = new ViewPage<object>();
ViewPage vp = vpInt;
object o = new object();
// Act
vp.ViewData.Model = o;
// Assert
Assert.Equal(o, vpInt.ViewData.Model);
Assert.Equal(o, vp.ViewData.Model);
}
[Fact]
public void SetViewItemOnDerivedClassPropagatesToBaseClass()
{
// Arrange
ViewPage<object> vpInt = new ViewPage<object>();
ViewPage vp = vpInt;
object o = new object();
// Act
vpInt.ViewData.Model = o;
// Assert
Assert.Equal(o, vpInt.ViewData.Model);
Assert.Equal(o, vp.ViewData.Model);
}
[Fact]
public void SetViewItemToWrongTypeThrows()
{
// Arrange
ViewPage vp = new ViewPage<string>();
// Act & Assert
Assert.Throws<InvalidOperationException>(
delegate { vp.ViewData.Model = 50; },
"The model item passed into the dictionary is of type 'System.Int32', but this dictionary requires a model item of type 'System.String'.");
}
[Fact]
public void RenderInitsHelpersAndSetsID()
{
// Arrange
ViewPageWithNoProcessRequest viewPage = new ViewPageWithNoProcessRequest();
TextWriter writer = new StringWriter();
Mock<ViewContext> mockViewContext = new Mock<ViewContext>();
mockViewContext.Setup(c => c.Writer).Returns(writer);
mockViewContext.Setup(c => c.HttpContext.Response.Output).Returns(TextWriter.Null);
mockViewContext.Setup(c => c.HttpContext.Server.Execute(It.IsAny<IHttpHandler>(), It.IsAny<TextWriter>(), true))
.Callback<IHttpHandler, TextWriter, bool>((_h, _w, _pf) =>
{
ViewPage.SwitchWriter switchWriter = _w as ViewPage.SwitchWriter;
Assert.NotNull(switchWriter);
Assert.Same(writer, switchWriter.InnerWriter);
})
.Verifiable();
// Act
viewPage.RenderView(mockViewContext.Object);
// Assert
mockViewContext.Verify();
Assert.NotNull(viewPage.Ajax);
Assert.NotNull(viewPage.Html);
Assert.NotNull(viewPage.Url);
}
[Fact]
public void GenericPageRenderInitsHelpersAndSetsID()
{
// Arrange
Mock<ViewContext> mockViewContext = new Mock<ViewContext>();
mockViewContext.Setup(c => c.Writer).Returns(new StringWriter());
mockViewContext.Setup(c => c.HttpContext.Response.Output).Returns(TextWriter.Null);
mockViewContext.Setup(c => c.HttpContext.Server).Returns(new Mock<HttpServerUtilityBase>().Object);
ViewPageWithNoProcessRequest<Controller> viewPage = new ViewPageWithNoProcessRequest<Controller>();
// Act
viewPage.RenderView(mockViewContext.Object);
// Assert
Assert.NotNull(viewPage.Ajax);
Assert.NotNull(viewPage.Html);
Assert.NotNull(viewPage.Url);
Assert.NotNull(((ViewPage)viewPage).Html);
Assert.NotNull(((ViewPage)viewPage).Url);
}
private static void WriterSetCorrectlyInternal(bool throwException)
{
// Arrange
bool triggered = false;
HtmlTextWriter writer = new HtmlTextWriter(TextWriter.Null);
MockViewPage vp = new MockViewPage();
vp.RenderCallback = delegate()
{
triggered = true;
Assert.Equal(writer, vp.Writer);
if (throwException)
{
throw new CallbackException();
}
};
// Act & Assert
Assert.Null(vp.Writer);
try
{
vp.RenderControl(writer);
}
catch (CallbackException)
{
}
Assert.Null(vp.Writer);
Assert.True(triggered);
}
[Fact]
public void WriterSetCorrectly()
{
WriterSetCorrectlyInternal(false /* throwException */);
}
[Fact]
public void WriterSetCorrectlyThrowException()
{
WriterSetCorrectlyInternal(true /* throwException */);
}
private sealed class ViewPageWithNoProcessRequest : ViewPage
{
public override void ProcessRequest(HttpContext context)
{
}
}
private sealed class ViewPageWithNoProcessRequest<TModel> : ViewPage<TModel>
{
public override void ProcessRequest(HttpContext context)
{
}
}
[Fact]
public void ViewBagProperty_ReflectsViewData()
{
// Arrange
ViewPage page = new ViewPage();
page.ViewData["A"] = 1;
// Act & Assert
Assert.NotNull(page.ViewBag);
Assert.Equal(1, page.ViewBag.A);
}
[Fact]
public void ViewBagProperty_ReflectsNewViewDataInstance()
{
// Arrange
ViewPage page = new ViewPage();
page.ViewData["A"] = 1;
page.ViewData = new ViewDataDictionary() { { "A", "bar" } };
// Act & Assert
Assert.Equal("bar", page.ViewBag.A);
}
[Fact]
public void ViewBagProperty_PropagatesChangesToViewData()
{
// Arrange
ViewPage page = new ViewPage();
page.ViewData["A"] = 1;
// Act
page.ViewBag.A = "foo";
page.ViewBag.B = 2;
// Assert
Assert.Equal("foo", page.ViewData["A"]);
Assert.Equal(2, page.ViewData["B"]);
}
private sealed class MockViewPage : ViewPage
{
public MockViewPage()
{
}
public Action RenderCallback { get; set; }
protected override void RenderChildren(HtmlTextWriter writer)
{
if (RenderCallback != null)
{
RenderCallback();
}
base.RenderChildren(writer);
}
}
private sealed class FooModel
{
}
private sealed class CallbackException : Exception
{
}
}
}
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