public async Task ProcessAsync_RendersMainPartial_If_FallbackIsSet_AndMainPartialIsFound()
{
// Arrange
var expected = "Hello from partial!";
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var fallbackName = "_Fallback";
var model = new object();
var viewContext = GetViewContext();
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
v.Writer.Write(expected);
})
.Returns(Task.CompletedTask);
var fallbackView = new Mock <IView>();
fallbackView.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
v.Writer.Write("Hello from fallback partial!");
})
.Returns(Task.CompletedTask);
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), fallbackName, false))
.Returns(ViewEngineResult.Found(fallbackName, fallbackView.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
FallbackName = fallbackName
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
var content = HtmlContentUtilities.HtmlContentToString(output.Content, new HtmlTestEncoder());
Assert.Equal(expected, content);
}
public async Task ProcessAsync_IfHasFallback_Throws_When_MainPartialAndFallback_AreNotFound()
{
// Arrange
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var fallbackName = "_Fallback";
var expected = string.Join(
Environment.NewLine,
$"The partial view '{partialName}' was not found. The following locations were searched:",
"PartialNotFound1",
"PartialNotFound2",
"PartialNotFound3",
"PartialNotFound4",
$"The fallback partial view '{fallbackName}' was not found. The following locations were searched:",
"FallbackNotFound1",
"FallbackNotFound2",
"FallbackNotFound3",
"FallbackNotFound4");
var viewData = new ViewDataDictionary(new TestModelMetadataProvider(), new ModelStateDictionary());
var viewContext = GetViewContext();
var view = Mock.Of <IView>();
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.NotFound(partialName, new[] { "PartialNotFound1", "PartialNotFound2" }));
viewEngine.Setup(v => v.FindView(viewContext, partialName, false))
.Returns(ViewEngineResult.NotFound(partialName, new[] { $"PartialNotFound3", $"PartialNotFound4" }));
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), fallbackName, false))
.Returns(ViewEngineResult.NotFound(partialName, new[] { "FallbackNotFound1", "FallbackNotFound2" }));
viewEngine.Setup(v => v.FindView(viewContext, fallbackName, false))
.Returns(ViewEngineResult.NotFound(partialName, new[] { $"FallbackNotFound3", $"FallbackNotFound4" }));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
ViewData = viewData,
FallbackName = fallbackName
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act & Assert
var exception = await Assert.ThrowsAsync <InvalidOperationException>(
() => tagHelper.ProcessAsync(tagHelperContext, output));
Assert.Equal(expected, exception.Message);
}
public async Task ProcessAsync_SetsHtmlFieldPrefix_UsingModelExpression()
{
// Arrange
var expected = "order.items[0].Property";
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var modelMetadataProvider = new TestModelMetadataProvider();
var containerModel = new TestModel {
Property = new PropertyModel()
};
var containerModelExplorer = modelMetadataProvider.GetModelExplorerForType(
typeof(TestModel),
containerModel);
var propertyModelExplorer = containerModelExplorer.GetExplorerForProperty(nameof(TestModel.Property));
var modelExpression = new ModelExpression("Property", propertyModelExplorer);
var viewContext = GetViewContext();
viewContext.ViewData.TemplateInfo.HtmlFieldPrefix = "order.items[0]";
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
Assert.Equal(expected, v.ViewData.TemplateInfo.HtmlFieldPrefix);
})
.Returns(Task.CompletedTask)
.Verifiable();
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
For = modelExpression,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
view.Verify();
Assert.Equal("order.items[0]", viewContext.ViewData.TemplateInfo.HtmlFieldPrefix);
}
public async Task ProcessAsync_UsesModelExpression_ToDetermineModel()
{
// Arrange
var expected = new PropertyModel();
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var modelMetadataProvider = new TestModelMetadataProvider();
var containerModel = new TestModel {
Property = expected
};
var containerModelExplorer = modelMetadataProvider.GetModelExplorerForType(
typeof(TestModel),
containerModel);
var propertyModelExplorer = containerModelExplorer.GetExplorerForProperty(nameof(TestModel.Property));
var modelExpression = new ModelExpression("Property", propertyModelExplorer);
var viewContext = GetViewContext();
viewContext.ViewData.Model = new object();
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
var actual = Assert.IsType <PropertyModel>(v.ViewData.Model);
Assert.Same(expected, actual);
})
.Returns(Task.CompletedTask)
.Verifiable();
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
For = modelExpression,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
view.Verify();
}
public async Task ProcessAsync_UsesPassedInViewData_WhenNotNull()
{
// Arrange
var expected = "Explicit";
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var model = new object();
var viewData = new ViewDataDictionary(new TestModelMetadataProvider(), new ModelStateDictionary());
viewData["key"] = expected;
var viewContext = GetViewContext();
viewContext.ViewData["key"] = "ViewContext";
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
v.Writer.Write(v.ViewData["key"]);
})
.Returns(Task.CompletedTask);
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
ViewData = viewData,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
var content = HtmlContentUtilities.HtmlContentToString(output.Content, new HtmlTestEncoder());
Assert.Equal(expected, content);
}
public async Task ProcessAsync_UsesViewDataFromContext()
{
// Arrange
var expected = "Implicit";
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var viewContext = GetViewContext();
viewContext.ViewData["key"] = expected;
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
v.Writer.Write(v.ViewData["key"]);
})
.Returns(Task.CompletedTask);
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.NotFound(partialName, new[] { partialName }));
viewEngine.Setup(v => v.FindView(viewContext, partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
var content = HtmlContentUtilities.HtmlContentToString(output.Content, new HtmlTestEncoder());
Assert.Equal(expected, content);
}
public async Task ProcessAsync_IfOptional_And_ViewIsNotFound_WillNotRenderAnything()
{
// Arrange
var expected = string.Empty;
var bufferScope = new TestViewBufferScope();
var partialName = "_ThisViewDoesNotExists";
var model = new object();
var viewContext = GetViewContext();
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
v.Writer.Write(expected);
})
.Returns(Task.CompletedTask);
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.NotFound(partialName, searchedLocations: Array.Empty <string>()));
viewEngine.Setup(v => v.FindView(viewContext, partialName, false))
.Returns(ViewEngineResult.NotFound(partialName, searchedLocations: Array.Empty <string>()));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
Optional = true
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
var content = HtmlContentUtilities.HtmlContentToString(output.Content, new HtmlTestEncoder());
Assert.Empty(content);
}
public async Task ProcessAsync_DoesNotModifyHtmlFieldPrefix_WhenModelExpressionIsNull()
{
// Arrange
var expected = "original";
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var model = new object();
var viewContext = GetViewContext();
viewContext.ViewData.Model = model;
viewContext.ViewData.TemplateInfo.HtmlFieldPrefix = expected;
var view = new Mock <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Callback((ViewContext v) =>
{
Assert.Equal(expected, v.ViewData.TemplateInfo.HtmlFieldPrefix);
})
.Returns(Task.CompletedTask)
.Verifiable();
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
view.Verify();
}
public async Task ProcessAsync_DisposesViewInstance()
{
// Arrange
var bufferScope = new TestViewBufferScope();
var partialName = "_Partial";
var viewContext = GetViewContext();
var disposable = new Mock <IDisposable>();
disposable.Setup(d => d.Dispose()).Verifiable();
var view = disposable.As <IView>();
view.Setup(v => v.RenderAsync(It.IsAny <ViewContext>()))
.Returns(Task.CompletedTask)
.Verifiable();
var viewEngine = new Mock <ICompositeViewEngine>();
viewEngine.Setup(v => v.GetView(It.IsAny <string>(), partialName, false))
.Returns(ViewEngineResult.Found(partialName, view.Object));
var tagHelper = new PartialTagHelper(viewEngine.Object, bufferScope)
{
Name = partialName,
ViewContext = viewContext,
};
var tagHelperContext = GetTagHelperContext();
var output = GetTagHelperOutput();
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
disposable.Verify();
view.Verify();
}
