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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc.Controllers;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Mvc.ViewEngines;
using Microsoft.AspNetCore.Routing;
using Microsoft.AspNetCore.InternalTesting;
using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Options;
using Microsoft.Net.Http.Headers;
using Moq;
namespace Microsoft.AspNetCore.Mvc.ViewFeatures;
public class ViewResultExecutorTest
{
[Fact]
public void FindView_UsesViewEngine_FromViewResult()
{
// Arrange
var context = GetActionContext();
var executor = GetViewExecutor();
var viewName = "my-view";
var viewEngine = new Mock<ICompositeViewEngine>(MockBehavior.Strict);
viewEngine
.Setup(e => e.GetView(/*executingFilePath*/ null, viewName, /*isMainPage*/ true))
.Returns(ViewEngineResult.NotFound(viewName, Enumerable.Empty<string>()))
.Verifiable();
viewEngine
.Setup(e => e.FindView(context, viewName, /*isMainPage*/ true))
.Returns(ViewEngineResult.Found(viewName, Mock.Of<IView>()))
.Verifiable();
var viewResult = new ViewResult
{
ViewEngine = viewEngine.Object,
ViewName = viewName,
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider()),
TempData = Mock.Of<ITempDataDictionary>(),
};
// Act
var viewEngineResult = executor.FindView(context, viewResult);
// Assert
Assert.Equal(viewName, viewEngineResult.ViewName);
viewEngine.Verify();
}
[Fact]
public void FindView_UsesActionDescriptorName_IfViewNameIsNull()
{
// Arrange
var viewName = "some-view-name";
var context = GetActionContext(viewName);
var executor = GetViewExecutor();
var viewResult = new ViewResult
{
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider()),
TempData = Mock.Of<ITempDataDictionary>(),
};
// Act
var viewEngineResult = executor.FindView(context, viewResult);
// Assert
Assert.Equal(viewName, viewEngineResult.ViewName);
}
[Fact]
[ReplaceCulture("de-CH", "de-CH")]
public void FindView_UsesActionDescriptorName_IfViewNameIsNull_UsesInvariantCulture()
{
// Arrange
var viewName = "10/31/2018 07:37:38 -07:00";
var context = GetActionContext(viewName);
context.RouteData.Values["action"] = new DateTimeOffset(2018, 10, 31, 7, 37, 38, TimeSpan.FromHours(-7));
var executor = GetViewExecutor();
var viewResult = new ViewResult
{
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider()),
TempData = Mock.Of<ITempDataDictionary>(),
};
// Act
var viewEngineResult = executor.FindView(context, viewResult);
// Assert
Assert.Equal(viewName, viewEngineResult.ViewName);
}
[Fact]
public void FindView_ReturnsExpectedNotFoundResult_WithGetViewLocations()
{
// Arrange
var expectedLocations = new[] { "location1", "location2" };
var context = GetActionContext();
var executor = GetViewExecutor();
var viewName = "myview";
var viewEngine = new Mock<IViewEngine>(MockBehavior.Strict);
viewEngine
.Setup(e => e.GetView(/*executingFilePath*/ null, "myview", /*isMainPage*/ true))
.Returns(ViewEngineResult.NotFound("myview", expectedLocations));
viewEngine
.Setup(e => e.FindView(context, "myview", /*isMainPage*/ true))
.Returns(ViewEngineResult.NotFound("myview", Enumerable.Empty<string>()));
var viewResult = new ViewResult
{
ViewName = viewName,
ViewEngine = viewEngine.Object,
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider()),
TempData = Mock.Of<ITempDataDictionary>(),
};
// Act
var result = executor.FindView(context, viewResult);
// Assert
Assert.False(result.Success);
Assert.Null(result.View);
Assert.Equal(expectedLocations, result.SearchedLocations);
}
[Fact]
public void FindView_ReturnsExpectedNotFoundResult_WithFindViewLocations()
{
// Arrange
var expectedLocations = new[] { "location1", "location2" };
var context = GetActionContext();
var executor = GetViewExecutor();
var viewName = "myview";
var viewEngine = new Mock<IViewEngine>(MockBehavior.Strict);
viewEngine
.Setup(e => e.GetView(/*executingFilePath*/ null, "myview", /*isMainPage*/ true))
.Returns(ViewEngineResult.NotFound("myview", Enumerable.Empty<string>()));
viewEngine
.Setup(e => e.FindView(context, "myview", /*isMainPage*/ true))
.Returns(ViewEngineResult.NotFound("myview", expectedLocations));
var viewResult = new ViewResult
{
ViewName = viewName,
ViewEngine = viewEngine.Object,
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider()),
TempData = Mock.Of<ITempDataDictionary>(),
};
// Act
var result = executor.FindView(context, viewResult);
// Assert
Assert.False(result.Success);
Assert.Null(result.View);
Assert.Equal(expectedLocations, result.SearchedLocations);
}
[Fact]
public void FindView_ReturnsExpectedNotFoundResult_WithAllLocations()
{
// Arrange
var expectedLocations = new[] { "location1", "location2", "location3", "location4" };
var context = GetActionContext();
var executor = GetViewExecutor();
var viewName = "myview";
var viewEngine = new Mock<IViewEngine>(MockBehavior.Strict);
viewEngine
.Setup(e => e.GetView(/*executingFilePath*/ null, "myview", /*isMainPage*/ true))
.Returns(ViewEngineResult.NotFound("myview", new[] { "location1", "location2" }));
viewEngine
.Setup(e => e.FindView(context, "myview", /*isMainPage*/ true))
.Returns(ViewEngineResult.NotFound("myview", new[] { "location3", "location4" }));
var viewResult = new ViewResult
{
ViewName = viewName,
ViewEngine = viewEngine.Object,
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider()),
TempData = Mock.Of<ITempDataDictionary>(),
};
// Act
var result = executor.FindView(context, viewResult);
// Assert
Assert.False(result.Success);
Assert.Null(result.View);
Assert.Equal(expectedLocations, result.SearchedLocations);
}
[Fact]
public void FindView_WritesDiagnostic_ViewFound()
{
// Arrange
var diagnosticListener = new DiagnosticListener("Test");
var listener = new TestDiagnosticListener();
diagnosticListener.SubscribeWithAdapter(listener);
var context = GetActionContext();
var executor = GetViewExecutor(diagnosticListener);
var viewName = "myview";
var viewResult = new ViewResult
{
ViewName = viewName,
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider()),
TempData = Mock.Of<ITempDataDictionary>(),
};
// Act
var viewEngineResult = executor.FindView(context, viewResult);
// Assert
Assert.Equal(viewName, viewEngineResult.ViewName);
Assert.NotNull(listener.ViewFound);
Assert.NotNull(listener.ViewFound.ActionContext);
Assert.NotNull(listener.ViewFound.Result);
Assert.NotNull(listener.ViewFound.View);
Assert.True(listener.ViewFound.IsMainPage);
Assert.Equal("myview", listener.ViewFound.ViewName);
}
[Fact]
public void FindView_WritesDiagnostic_ViewNotFound()
{
// Arrange
var diagnosticListener = new DiagnosticListener("Test");
var listener = new TestDiagnosticListener();
diagnosticListener.SubscribeWithAdapter(listener);
var context = GetActionContext();
var executor = GetViewExecutor(diagnosticListener);
var viewName = "myview";
var viewEngine = new Mock<IViewEngine>(MockBehavior.Strict);
viewEngine
.Setup(e => e.GetView(/*executingFilePath*/ null, "myview", /*isMainPage*/ true))
.Returns(ViewEngineResult.NotFound("myview", Enumerable.Empty<string>()));
viewEngine
.Setup(e => e.FindView(context, "myview", /*isMainPage*/ true))
.Returns(ViewEngineResult.NotFound("myview", new string[] { "location/myview" }));
var viewResult = new ViewResult
{
ViewName = viewName,
ViewEngine = viewEngine.Object,
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider()),
TempData = Mock.Of<ITempDataDictionary>(),
};
// Act
var viewEngineResult = executor.FindView(context, viewResult);
// Assert
Assert.False(viewEngineResult.Success);
Assert.NotNull(listener.ViewNotFound);
Assert.NotNull(listener.ViewNotFound.ActionContext);
Assert.NotNull(listener.ViewNotFound.Result);
Assert.Equal(new string[] { "location/myview" }, listener.ViewNotFound.SearchedLocations);
Assert.Equal("myview", listener.ViewNotFound.ViewName);
}
[Fact]
public async Task ExecuteAsync_UsesContentType_FromViewResult()
{
// Arrange
var context = GetActionContext();
var executor = GetViewExecutor();
var contentType = "application/x-my-content-type";
var viewResult = new ViewResult
{
ViewName = "my-view",
ContentType = contentType,
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider()),
TempData = Mock.Of<ITempDataDictionary>(),
};
// Act
await executor.ExecuteAsync(context, viewResult);
// Assert
Assert.Equal("application/x-my-content-type", context.HttpContext.Response.ContentType);
}
[Fact]
public async Task ExecuteAsync_UsesStatusCode_FromViewResult()
{
// Arrange
var context = GetActionContext();
var executor = GetViewExecutor();
var contentType = MediaTypeHeaderValue.Parse("application/x-my-content-type");
var viewResult = new ViewResult
{
ViewName = "my-view",
StatusCode = 404,
ViewData = new ViewDataDictionary(new EmptyModelMetadataProvider()),
TempData = Mock.Of<ITempDataDictionary>(),
};
// Act
await executor.ExecuteAsync(context, viewResult);
// Assert
Assert.Equal(404, context.HttpContext.Response.StatusCode);
}
private ActionContext GetActionContext(string actionName = null)
{
var routeData = new RouteData();
routeData.Values["action"] = actionName;
return new ActionContext(new DefaultHttpContext(), routeData, new ControllerActionDescriptor() { ActionName = actionName });
}
private ViewResultExecutor GetViewExecutor(DiagnosticListener diagnosticListener = null)
{
if (diagnosticListener == null)
{
diagnosticListener = new DiagnosticListener("Test");
}
var viewEngine = new Mock<IViewEngine>(MockBehavior.Strict);
viewEngine
.Setup(e => e.GetView(/*executingFilePath*/ null, It.IsAny<string>(), /*isMainPage*/ true))
.Returns<string, string, bool>(
(path, name, partial) => ViewEngineResult.NotFound(name, Enumerable.Empty<string>()));
viewEngine
.Setup(e => e.FindView(It.IsAny<ActionContext>(), It.IsAny<string>(), /*isMainPage*/ true))
.Returns<ActionContext, string, bool>(
(context, name, partial) => ViewEngineResult.Found(name, Mock.Of<IView>()));
var options = Options.Create(new MvcViewOptions());
options.Value.ViewEngines.Add(viewEngine.Object);
var viewExecutor = new ViewResultExecutor(
options,
new TestHttpResponseStreamWriterFactory(),
new CompositeViewEngine(options),
new TempDataDictionaryFactory(Mock.Of<ITempDataProvider>()),
diagnosticListener,
NullLoggerFactory.Instance,
new EmptyModelMetadataProvider());
return viewExecutor;
}
}
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