private void BuildFallbackBlock(TagHelperAttributeList attributes, DefaultTagHelperContent builder)
{
EnsureGlobbingUrlBuilder();
var fallbackSrcs = GlobbingUrlBuilder.BuildUrlList(FallbackSrc, FallbackSrcInclude, FallbackSrcExclude);
if (fallbackSrcs.Any())
{
// Build the <script> tag that checks the test method and if it fails, renders the extra script.
builder.AppendEncoded(Environment.NewLine)
.AppendEncoded("<script>(")
.AppendEncoded(FallbackTestExpression)
.AppendEncoded("||document.write(\"");
// May have no "src" attribute in the dictionary e.g. if Src and SrcInclude were not bound.
if (!attributes.ContainsName(SrcAttributeName))
{
// Need this entry to place each fallback source.
attributes.Add(new TagHelperAttribute(SrcAttributeName, value: null));
}
foreach (var src in fallbackSrcs)
{
// Fallback "src" values come from bound attributes and globbing. Must always be non-null.
Debug.Assert(src != null);
builder.AppendEncoded("<script");
foreach (var attribute in attributes)
{
if (!attribute.Name.Equals(SrcAttributeName, StringComparison.OrdinalIgnoreCase))
{
var encodedKey = JavaScriptEncoder.JavaScriptStringEncode(attribute.Name);
var attributeValue = attribute.Value.ToString();
var encodedValue = JavaScriptEncoder.JavaScriptStringEncode(attributeValue);
AppendAttribute(builder, encodedKey, encodedValue, escapeQuotes: true);
}
else
{
// Ignore attribute.Value; use src instead.
var attributeValue = src;
if (AppendVersion == true)
{
attributeValue = _fileVersionProvider.AddFileVersionToPath(attributeValue);
}
// attribute.Key ("src") does not need to be JavaScript-encoded.
var encodedValue = JavaScriptEncoder.JavaScriptStringEncode(attributeValue);
AppendAttribute(builder, attribute.Name, encodedValue, escapeQuotes: true);
}
}
builder.AppendEncoded("><\\/script>");
}
builder.AppendEncoded("\"));</script>");
}
}
public async Task ProcessAsync_DoesNotOverrideOutputContent(
string childContent, string outputContent, string expectedOutputContent)
{
// Arrange
var tagBuilder = new TagBuilder("span2");
tagBuilder.InnerHtml.SetContentEncoded("New HTML");
tagBuilder.Attributes.Add("data-foo", "bar");
tagBuilder.Attributes.Add("data-hello", "world");
var generator = new Mock <IHtmlGenerator>(MockBehavior.Strict);
var setup = generator
.Setup(mock => mock.GenerateValidationMessage(
It.IsAny <ViewContext>(),
It.IsAny <string>(),
It.IsAny <string>(),
It.IsAny <string>(),
It.IsAny <object>()))
.Returns(tagBuilder);
var validationMessageTagHelper = new ValidationMessageTagHelper(generator.Object)
{
For = CreateModelExpression("Hello")
};
var output = new TagHelperOutput(
"span",
attributes: new TagHelperAttributeList());
output.Content.AppendEncoded(outputContent);
var context = new TagHelperContext(
allAttributes: new ReadOnlyTagHelperAttributeList <IReadOnlyTagHelperAttribute>(
Enumerable.Empty <IReadOnlyTagHelperAttribute>()),
items: new Dictionary <object, object>(),
uniqueId: "test",
getChildContentAsync: useCachedResult =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.AppendEncoded(childContent);
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var viewContext = CreateViewContext();
validationMessageTagHelper.ViewContext = viewContext;
// Act
await validationMessageTagHelper.ProcessAsync(context, output : output);
// Assert
Assert.Equal("span", output.TagName);
Assert.Equal(2, output.Attributes.Count);
var attribute = Assert.Single(output.Attributes, attr => attr.Name.Equals("data-foo"));
Assert.Equal("bar", attribute.Value);
attribute = Assert.Single(output.Attributes, attr => attr.Name.Equals("data-hello"));
Assert.Equal("world", attribute.Value);
Assert.Equal(expectedOutputContent, output.Content.GetContent());
}
public async Task ProcessAsync_GeneratesExpectedOutput(
object model,
Type containerType,
Func <object> modelAccessor,
string propertyPath,
TagHelperOutputContent tagHelperOutputContent)
{
// Arrange
var expectedTagName = "not-label";
var expectedAttributes = new TagHelperAttributeList
{
{ "class", "form-control" },
{ "for", tagHelperOutputContent.ExpectedId }
};
var metadataProvider = new TestModelMetadataProvider();
var containerMetadata = metadataProvider.GetMetadataForType(containerType);
var containerExplorer = metadataProvider.GetModelExplorerForType(containerType, model);
var propertyMetadata = metadataProvider.GetMetadataForProperty(containerType, "Text");
var modelExplorer = containerExplorer.GetExplorerForExpression(propertyMetadata, modelAccessor());
var htmlGenerator = new TestableHtmlGenerator(metadataProvider);
var modelExpression = new ModelExpression(propertyPath, modelExplorer);
var tagHelper = new LabelTagHelper(htmlGenerator)
{
For = modelExpression,
};
var expectedPreContent = "original pre-content";
var expectedPostContent = "original post-content";
var tagHelperContext = new TagHelperContext(
allAttributes: new ReadOnlyTagHelperAttributeList <IReadOnlyTagHelperAttribute>(
Enumerable.Empty <IReadOnlyTagHelperAttribute>()),
items: new Dictionary <object, object>(),
uniqueId: "test",
getChildContentAsync: useCachedResult =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.AppendEncoded(tagHelperOutputContent.OriginalChildContent);
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var htmlAttributes = new TagHelperAttributeList
{
{ "class", "form-control" },
};
var output = new TagHelperOutput(expectedTagName, htmlAttributes);
output.PreContent.AppendEncoded(expectedPreContent);
output.PostContent.AppendEncoded(expectedPostContent);
// LabelTagHelper checks IsContentModified so we don't want to forcibly set it if
// tagHelperOutputContent.OriginalContent is going to be null or empty.
if (!string.IsNullOrEmpty(tagHelperOutputContent.OriginalContent))
{
output.Content.AppendEncoded(tagHelperOutputContent.OriginalContent);
}
var viewContext = TestableHtmlGenerator.GetViewContext(model, htmlGenerator, metadataProvider);
tagHelper.ViewContext = viewContext;
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
Assert.Equal(expectedAttributes, output.Attributes);
Assert.Equal(expectedPreContent, output.PreContent.GetContent());
Assert.Equal(
tagHelperOutputContent.ExpectedContent,
HtmlContentUtilities.HtmlContentToString(output.Content));
Assert.Equal(expectedPostContent, output.PostContent.GetContent());
Assert.Equal(TagMode.StartTagAndEndTag, output.TagMode);
Assert.Equal(expectedTagName, output.TagName);
}
public async Task ProcessAsyncInTemplate_WithItems_GeneratesExpectedOutput_DoesNotChangeSelectList(
object model,
Type containerType,
Func <object> modelAccessor,
NameAndId nameAndId,
string expectedOptions)
{
// Arrange
var originalAttributes = new TagHelperAttributeList
{
{ "class", "form-control" },
};
var originalPostContent = "original content";
var expectedAttributes = new TagHelperAttributeList(originalAttributes)
{
{ "id", nameAndId.Id },
{ "name", nameAndId.Name },
{ "valid", "from validation attributes" },
};
var expectedPreContent = "original pre-content";
var expectedContent = "original content";
var expectedPostContent = originalPostContent + expectedOptions;
var expectedTagName = "select";
var metadataProvider = new TestModelMetadataProvider();
var containerMetadata = metadataProvider.GetMetadataForType(containerType);
var containerExplorer = metadataProvider.GetModelExplorerForType(containerType, model);
var propertyMetadata = metadataProvider.GetMetadataForProperty(containerType, "Text");
var modelExplorer = containerExplorer.GetExplorerForExpression(propertyMetadata, modelAccessor());
var modelExpression = new ModelExpression(name: string.Empty, modelExplorer: modelExplorer);
var tagHelperContext = new TagHelperContext(
allAttributes: new ReadOnlyTagHelperAttributeList <IReadOnlyTagHelperAttribute>(
Enumerable.Empty <IReadOnlyTagHelperAttribute>()),
items: new Dictionary <object, object>(),
uniqueId: "test",
getChildContentAsync: useCachedResult =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.AppendEncoded("Something");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var output = new TagHelperOutput(expectedTagName, originalAttributes)
{
TagMode = TagMode.SelfClosing,
};
output.PreContent.AppendEncoded(expectedPreContent);
output.Content.AppendEncoded(expectedContent);
output.PostContent.AppendEncoded(originalPostContent);
var htmlGenerator = new TestableHtmlGenerator(metadataProvider)
{
ValidationAttributes =
{
{ "valid", "from validation attributes" },
}
};
var viewContext = TestableHtmlGenerator.GetViewContext(model, htmlGenerator, metadataProvider);
viewContext.ViewData.TemplateInfo.HtmlFieldPrefix = nameAndId.Name;
var items = new SelectList(new[] { "", "outer text", "inner text", "other text" });
var savedDisabled = items.Select(item => item.Disabled).ToList();
var savedGroup = items.Select(item => item.Group).ToList();
var savedSelected = items.Select(item => item.Selected).ToList();
var savedText = items.Select(item => item.Text).ToList();
var savedValue = items.Select(item => item.Value).ToList();
var tagHelper = new SelectTagHelper(htmlGenerator)
{
For = modelExpression,
Items = items,
ViewContext = viewContext,
};
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
Assert.Equal(TagMode.SelfClosing, output.TagMode);
Assert.Equal(expectedAttributes, output.Attributes);
Assert.Equal(expectedPreContent, output.PreContent.GetContent());
Assert.Equal(expectedContent, output.Content.GetContent());
Assert.Equal(expectedPostContent, HtmlContentUtilities.HtmlContentToString(output.PostContent));
Assert.Equal(expectedTagName, output.TagName);
Assert.NotNull(viewContext.FormContext?.FormData);
Assert.Single(
viewContext.FormContext.FormData,
entry => entry.Key == SelectTagHelper.SelectedValuesFormDataKey);
Assert.Equal(savedDisabled, items.Select(item => item.Disabled));
Assert.Equal(savedGroup, items.Select(item => item.Group));
Assert.Equal(savedSelected, items.Select(item => item.Selected));
Assert.Equal(savedText, items.Select(item => item.Text));
Assert.Equal(savedValue, items.Select(item => item.Value));
}
