public void WriteViewComponentTagHelper(CodeRenderingContext context, ViewComponentTagHelperIntermediateNode node)
{
// Add target element.
WriteTargetElementString(context.CodeWriter, node.TagHelper);
// Initialize declaration.
using (context.CodeWriter.BuildClassDeclaration(
PublicModifiers,
node.ClassName,
TagHelperTypeName,
interfaces: null,
typeParameters: null))
{
// Add view component helper.
context.CodeWriter.WriteVariableDeclaration(
$"private readonly {ViewComponentHelperTypeName}",
ViewComponentHelperVariableName,
value: null);
// Add constructor.
WriteConstructorString(context.CodeWriter, node.ClassName);
// Add attributes.
WriteAttributeDeclarations(context.CodeWriter, node.TagHelper);
// Add process method.
WriteProcessMethodString(context.CodeWriter, node.TagHelper);
}
}
private void AddTagHelperClass(Context context, TagHelperDescriptor tagHelper)
{
var node = new ViewComponentTagHelperIntermediateNode()
{
ClassName = context.GetClassName(tagHelper),
TagHelper = tagHelper
};
context.Class.Children.Add(node);
}
public void WriteViewComponentTagHelper_GeneratesViewComponentTagHelper_WithIndexer()
{
// Arrange
var tagHelper = TagHelperDescriptorBuilder
.Create(ViewComponentTagHelperConventions.Kind, "TestTagHelper", "TestAssembly")
.TypeName("__Generated__TagCloudViewComponentTagHelper")
.BoundAttributeDescriptor(attribute => attribute
.Name("Foo")
.TypeName("System.Collections.Generic.Dictionary<System.String, System.Int32>")
.PropertyName("Tags")
.AsDictionaryAttribute("foo-", "System.Int32"))
.TagMatchingRuleDescriptor(rule => rule.RequireTagName("tagcloud"))
.AddMetadata(ViewComponentTagHelperMetadata.Name, "TagCloud")
.Build();
var extension = new ViewComponentTagHelperTargetExtension();
var context = TestCodeRenderingContext.CreateRuntime();
var node = new ViewComponentTagHelperIntermediateNode()
{
ClassName = "__Generated__TagCloudViewComponentTagHelper",
TagHelper = tagHelper
};
// Act
extension.WriteViewComponentTagHelper(context, node);
// Assert
var csharp = context.CodeWriter.GenerateCode();
Assert.Equal(
@"[Microsoft.AspNetCore.Razor.TagHelpers.HtmlTargetElementAttribute(""tagcloud"")]
public class __Generated__TagCloudViewComponentTagHelper : Microsoft.AspNetCore.Razor.TagHelpers.TagHelper
{
private readonly global::Microsoft.AspNetCore.Mvc.IViewComponentHelper _helper = null;
public __Generated__TagCloudViewComponentTagHelper(global::Microsoft.AspNetCore.Mvc.IViewComponentHelper helper)
{
_helper = helper;
}
[Microsoft.AspNetCore.Razor.TagHelpers.HtmlAttributeNotBoundAttribute, global::Microsoft.AspNetCore.Mvc.ViewFeatures.ViewContextAttribute]
public global::Microsoft.AspNetCore.Mvc.Rendering.ViewContext ViewContext { get; set; }
public System.Collections.Generic.Dictionary<System.String, System.Int32> Tags { get; set; }
= new System.Collections.Generic.Dictionary<System.String, System.Int32>();
public override async global::System.Threading.Tasks.Task ProcessAsync(Microsoft.AspNetCore.Razor.TagHelpers.TagHelperContext context, Microsoft.AspNetCore.Razor.TagHelpers.TagHelperOutput output)
{
(_helper as global::Microsoft.AspNetCore.Mvc.ViewFeatures.IViewContextAware)?.Contextualize(ViewContext);
var content = await _helper.InvokeAsync(""TagCloud"", new { Tags });
output.TagName = null;
output.Content.SetHtmlContent(content);
}
}
",
csharp,
ignoreLineEndingDifferences: true);
}
