Add AssemblyName to TagHelperDescriptor.

- TagHelperDescriptor's need a way to showcase where they came from so tooling can reverse look them up.
- Update tests to specify TagHelperDescriptor assembly names.

#214

src/Microsoft.AspNet.Razor.Runtime/TagHelpers/TagHelperDescriptorFactory.cs

@@ -30,10 +30,12 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
             var typeName = type.FullName;
             var attributeDescriptors = GetAttributeDescriptors(type);
             var contentBehavior = GetContentBehavior(type);
+            var assemblyName = type.GetTypeInfo().Assembly.GetName().Name;
 
             return tagNames.Select(tagName =>
                 new TagHelperDescriptor(tagName,
                                         typeName,
+                                        assemblyName,
                                         contentBehavior,
                                         attributeDescriptors));
         }

src/Microsoft.AspNet.Razor/TagHelpers/TagHelperDescriptor.cs

@@ -19,12 +19,18 @@ namespace Microsoft.AspNet.Razor.TagHelpers
         /// <param name="tagName">The tag name that the tag helper targets. '*' indicates a catch-all
         /// <see cref="TagHelperDescriptor"/> which applies to every HTML tag.</param>
         /// <param name="tagHelperName">The full name of the tag helper class.</param>
+        /// <param name="tagHelperAssemblyName">The name of the assembly the tag helper was resolved from.</param>
         /// <param name="contentBehavior">The <see cref="TagHelpers.ContentBehavior"/>
         /// of the tag helper.</param>
         public TagHelperDescriptor([NotNull] string tagName,
                                    [NotNull] string tagHelperName,
+                                   [NotNull] string tagHelperAssemblyName,
                                    ContentBehavior contentBehavior)
-            : this(tagName, tagHelperName, contentBehavior, Enumerable.Empty<TagHelperAttributeDescriptor>())
+            : this(tagName, 
+                   tagHelperName, 
+                   tagHelperAssemblyName, 
+                   contentBehavior, 
+                   Enumerable.Empty<TagHelperAttributeDescriptor>())
         {
         }
 
@@ -36,6 +42,7 @@ namespace Microsoft.AspNet.Razor.TagHelpers
         /// <see cref="TagHelperDescriptor"/> which applies to every HTML tag.</param>
         /// <param name="tagHelperName">The code class used to render the tag helper. Corresponds to
         /// the tag helper's <see cref="Type.FullName"/>.</param>
+        /// <param name="tagHelperAssemblyName">The name of the assembly the tag helper was resolved from.</param>
         /// <param name="contentBehavior">The <see cref="TagHelpers.ContentBehavior"/>
         /// of the tag helper.</param>
         /// <param name="attributes">
@@ -43,11 +50,13 @@ namespace Microsoft.AspNet.Razor.TagHelpers
         /// </param>
         public TagHelperDescriptor([NotNull] string tagName,
                                    [NotNull] string tagHelperName,
+                                   [NotNull] string tagHelperAssemblyName,
                                    ContentBehavior contentBehavior,
                                    [NotNull] IEnumerable<TagHelperAttributeDescriptor> attributes)
         {
             TagName = tagName;
             TagHelperName = tagHelperName;
+            AssemblyName = tagHelperAssemblyName;
             ContentBehavior = contentBehavior;
             Attributes = new List<TagHelperAttributeDescriptor>(attributes);
         }
@@ -62,6 +71,11 @@ namespace Microsoft.AspNet.Razor.TagHelpers
         /// </summary>
         public string TagHelperName { get; private set; }
 
+        /// <summary>
+        /// The name of the assembly the tag helper was resolved from.
+        /// </summary>
+        public string AssemblyName { get; private set; }
+
         /// <summary>
         /// The <see cref="TagHelpers.ContentBehavior"/> of the tag helper.
         /// </summary>

src/Microsoft.AspNet.Razor/TagHelpers/TagHelperDescriptorComparer.cs

@@ -35,6 +35,7 @@ namespace Microsoft.AspNet.Razor.TagHelpers
         {
             return string.Equals(descriptorX.TagHelperName, descriptorY.TagHelperName, StringComparison.Ordinal) &&
                    string.Equals(descriptorX.TagName, descriptorY.TagName, StringComparison.OrdinalIgnoreCase) &&
+                   string.Equals(descriptorX.AssemblyName, descriptorY.AssemblyName, StringComparison.Ordinal) &&
                    descriptorX.ContentBehavior == descriptorY.ContentBehavior;
         }
 
@@ -48,6 +49,7 @@ namespace Microsoft.AspNet.Razor.TagHelpers
             return HashCodeCombiner.Start()
                                    .Add(descriptor.TagName, StringComparer.OrdinalIgnoreCase)
                                    .Add(descriptor.TagHelperName, StringComparer.Ordinal)
+                                   .Add(descriptor.AssemblyName, StringComparer.Ordinal)
                                    .Add(descriptor.ContentBehavior)
                                    .CombinedHash;
         }

test/Microsoft.AspNet.Razor.Runtime.Test/TagHelpers/TagHelperDescriptorFactoryTest.cs

@@ -9,6 +9,9 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
 {
     public class TagHelperDescriptorFactoryTest
     {
+        private static readonly string AssemblyName =
+            typeof(TagHelperDescriptorFactoryTest).GetTypeInfo().Assembly.GetName().Name;
+
         [Fact]
         public void CreateDescriptor_OverridesAttributeNameFromAttribute()
         {
@@ -21,6 +24,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
                 new TagHelperDescriptor(
                     "OverriddenAttribute",
                     typeof(OverriddenAttributeTagHelper).FullName,
+                    AssemblyName,
                     ContentBehavior.None,
                     new[] {
                         new TagHelperAttributeDescriptor("SomethingElse", validProperty1),
@@ -47,6 +51,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
                 new TagHelperDescriptor(
                     "InheritedOverriddenAttribute",
                     typeof(InheritedOverriddenAttributeTagHelper).FullName,
+                    AssemblyName,
                     ContentBehavior.None,
                     new[] {
                         new TagHelperAttributeDescriptor(nameof(InheritedOverriddenAttributeTagHelper.ValidAttribute1),
@@ -74,6 +79,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
                 new TagHelperDescriptor(
                     "InheritedNotOverriddenAttribute",
                     typeof(InheritedNotOverriddenAttributeTagHelper).FullName,
+                    AssemblyName,
                     ContentBehavior.None,
                     new[] {
                         new TagHelperAttributeDescriptor("SomethingElse", validProperty1),
@@ -92,7 +98,8 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
         public void CreateDescriptor_BuildsDescriptorsFromSimpleTypes()
         {
             // Arrange
-            var expectedDescriptor = new TagHelperDescriptor("Object", "System.Object", ContentBehavior.None);
+            var assemblyName = typeof(object).GetTypeInfo().Assembly.GetName().Name;
+            var expectedDescriptor = new TagHelperDescriptor("Object", "System.Object", assemblyName, ContentBehavior.None);
 
             // Act
             var descriptors = TagHelperDescriptorFactory.CreateDescriptors(typeof(object));
@@ -111,6 +118,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
             var expectedDescriptor = new TagHelperDescriptor(
                 "InheritedSingleAttribute",
                 typeof(InheritedSingleAttributeTagHelper).FullName,
+                AssemblyName,
                 ContentBehavior.None,
                 new[] {
                     new TagHelperAttributeDescriptor(nameof(InheritedSingleAttributeTagHelper.IntAttribute), intProperty)
@@ -132,6 +140,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
             var expectedDescriptor = new TagHelperDescriptor(
                 "SingleAttribute",
                 typeof(SingleAttributeTagHelper).FullName,
+                AssemblyName,
                 ContentBehavior.None,
                 new[] {
                     new TagHelperAttributeDescriptor(nameof(SingleAttributeTagHelper.IntAttribute), intProperty)
@@ -154,6 +163,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
             var expectedDescriptor = new TagHelperDescriptor(
                 "MissingAccessor",
                 typeof(MissingAccessorTagHelper).FullName,
+                AssemblyName,
                 ContentBehavior.None,
                 new[] {
                     new TagHelperAttributeDescriptor(nameof(MissingAccessorTagHelper.ValidAttribute), validProperty)
@@ -176,6 +186,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
             var expectedDescriptor = new TagHelperDescriptor(
                 "PrivateAccessor",
                 typeof(PrivateAccessorTagHelper).FullName,
+                AssemblyName,
                 ContentBehavior.None,
                 new[] {
                     new TagHelperAttributeDescriptor(
@@ -197,6 +208,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
             var expectedDescriptor = new TagHelperDescriptor(
                 "CustomContentBehavior",
                 typeof(CustomContentBehaviorTagHelper).FullName,
+                AssemblyName,
                 ContentBehavior.Append);
 
             // Act
@@ -214,6 +226,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
             var expectedDescriptor = new TagHelperDescriptor(
                 "InheritedCustomContentBehavior",
                 typeof(InheritedCustomContentBehaviorTagHelper).FullName,
+                AssemblyName,
                 ContentBehavior.None);
 
             // Act
@@ -234,6 +247,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
                 new TagHelperDescriptor(
                     "div",
                     typeof(MultiTagTagHelper).FullName,
+                    AssemblyName,
                     ContentBehavior.None,
                     new[] {
                         new TagHelperAttributeDescriptor(nameof(MultiTagTagHelper.ValidAttribute), validProp)
@@ -241,6 +255,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
                 new TagHelperDescriptor(
                     "p",
                     typeof(MultiTagTagHelper).FullName,
+                    AssemblyName,
                     ContentBehavior.None,
                     new[] {
                         new TagHelperAttributeDescriptor(nameof(MultiTagTagHelper.ValidAttribute), validProp)
@@ -262,6 +277,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
             var expectedDescriptor = new TagHelperDescriptor(
                     "InheritedMultiTag",
                     typeof(InheritedMultiTagTagHelper).FullName,
+                    AssemblyName,
                     ContentBehavior.None,
                     new[] {
                         new TagHelperAttributeDescriptor(nameof(InheritedMultiTagTagHelper.ValidAttribute), validProp)
@@ -280,8 +296,16 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
         {
             // Arrange
             var expectedDescriptors = new[] {
-                new TagHelperDescriptor("p", typeof(DuplicateTagNameTagHelper).FullName, ContentBehavior.None),
+                new TagHelperDescriptor(
-                new TagHelperDescriptor("div", typeof(DuplicateTagNameTagHelper).FullName, ContentBehavior.None)
+                    "p",
+                    typeof(DuplicateTagNameTagHelper).FullName,
+                    AssemblyName,
+                    ContentBehavior.None),
+                new TagHelperDescriptor(
+                    "div",
+                    typeof(DuplicateTagNameTagHelper).FullName,
+                    AssemblyName,
+                    ContentBehavior.None)
             };
 
             // Act
@@ -296,8 +320,9 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
         {
             // Arrange
             var expectedDescriptors = new[] {
-                new TagHelperDescriptor("data-condition", 
+                new TagHelperDescriptor("data-condition",
-                                        typeof(OverrideNameTagHelper).FullName, 
+                                        typeof(OverrideNameTagHelper).FullName,
+                                        AssemblyName,
                                         ContentBehavior.None),
             };
 
@@ -313,9 +338,21 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
         {
             // Arrange
             var expectedDescriptors = new[] {
-                new TagHelperDescriptor("span", typeof(MultipleAttributeTagHelper).FullName, ContentBehavior.None),
+                new TagHelperDescriptor(
-                new TagHelperDescriptor("p", typeof(MultipleAttributeTagHelper).FullName, ContentBehavior.None),
+                    "span", 
-                new TagHelperDescriptor("div", typeof(MultipleAttributeTagHelper).FullName, ContentBehavior.None)
+                    typeof(MultipleAttributeTagHelper).FullName, 
+                    AssemblyName, 
+                    ContentBehavior.None),
+                new TagHelperDescriptor(
+                    "p", 
+                    typeof(MultipleAttributeTagHelper).FullName, 
+                    AssemblyName,
+                    ContentBehavior.None),
+                new TagHelperDescriptor(
+                    "div", 
+                    typeof(MultipleAttributeTagHelper).FullName, 
+                    AssemblyName,
+                    ContentBehavior.None)
             };
 
             // Act

test/Microsoft.AspNet.Razor.Runtime.Test/TagHelpers/TagHelperDescriptorResolverTest.cs

@@ -12,6 +12,9 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
 {
     public class TagHelperDescriptorResolverTest : TagHelperTypeResolverTest
     {
+        private static readonly string AssemblyName =
+            typeof(TagHelperDescriptorFactoryTest).GetTypeInfo().Assembly.GetName().Name;
+
         [Fact]
         public void DescriptorResolver_DoesNotReturnInvalidTagHelpersWhenSpecified()
         {
@@ -63,6 +66,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
             var tagHelperDescriptorResolver = new TagHelperDescriptorResolver(tagHelperTypeResolver);
             var expectedDescriptor = new TagHelperDescriptor("Valid_Plain",
                                                              typeof(Valid_PlainTagHelper).FullName,
+                                                             AssemblyName,
                                                              ContentBehavior.None);
 
             // Act
@@ -86,6 +90,7 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
                     }));
             var expectedDescriptor = new TagHelperDescriptor("Valid_Plain",
                                                              typeof(Valid_PlainTagHelper).FullName,
+                                                             AssemblyName,
                                                              ContentBehavior.None);
 
             // Act
@@ -110,9 +115,11 @@ namespace Microsoft.AspNet.Razor.Runtime.TagHelpers
             {
                 new TagHelperDescriptor("Valid_Plain",
                                         typeof(Valid_PlainTagHelper).FullName,
+                                        AssemblyName,
                                         ContentBehavior.None),
                 new TagHelperDescriptor("Valid_Inherited",
                                         typeof(Valid_InheritedTagHelper).FullName,
+                                        AssemblyName,
                                         ContentBehavior.None)
             };
 

test/Microsoft.AspNet.Razor.Test/Generator/CSharpTagHelperRenderingTest.cs

@@ -22,18 +22,21 @@ namespace Microsoft.AspNet.Razor.Test.Generator
                 {
                     new TagHelperDescriptor("p",
                                             "PTagHelper",
+                                            "SomeAssembly",
                                             ContentBehavior.None,
                                             new [] {
                                                 new TagHelperAttributeDescriptor("age", pAgePropertyInfo)
                                             }),
                     new TagHelperDescriptor("input",
                                             "InputTagHelper",
+                                            "SomeAssembly",
                                             ContentBehavior.None,
                                             new TagHelperAttributeDescriptor[] {
                                                 new TagHelperAttributeDescriptor("type", inputTypePropertyInfo)
                                             }),
                     new TagHelperDescriptor("input",
                                             "InputTagHelper2",
+                                            "SomeAssembly",
                                             ContentBehavior.None,
                                             new TagHelperAttributeDescriptor[] {
                                                 new TagHelperAttributeDescriptor("type", inputTypePropertyInfo),
@@ -49,11 +52,11 @@ namespace Microsoft.AspNet.Razor.Test.Generator
             {
                 return new[]
                 {
-                    new TagHelperDescriptor("modify", "ModifyTagHelper", ContentBehavior.Modify),
+                    new TagHelperDescriptor("modify", "ModifyTagHelper", "SomeAssembly", ContentBehavior.Modify),
-                    new TagHelperDescriptor("none", "NoneTagHelper", ContentBehavior.None),
+                    new TagHelperDescriptor("none", "NoneTagHelper", "SomeAssembly", ContentBehavior.None),
-                    new TagHelperDescriptor("append", "AppendTagHelper", ContentBehavior.Append),
+                    new TagHelperDescriptor("append", "AppendTagHelper", "SomeAssembly", ContentBehavior.Append),
-                    new TagHelperDescriptor("prepend", "PrependTagHelper", ContentBehavior.Prepend),
+                    new TagHelperDescriptor("prepend", "PrependTagHelper", "SomeAssembly", ContentBehavior.Prepend),
-                    new TagHelperDescriptor("replace", "ReplaceTagHelper", ContentBehavior.Replace)
+                    new TagHelperDescriptor("replace", "ReplaceTagHelper", "SomeAssembly", ContentBehavior.Replace)
                 };
             }
         }
@@ -214,7 +217,7 @@ namespace Microsoft.AspNet.Razor.Test.Generator
             RunTagHelperTest("AddTagHelperDirective",
                              designTimeMode: true,
                              tagHelperDescriptors: new[] {
-                                new TagHelperDescriptor("p", "pTagHelper", ContentBehavior.None)
+                                new TagHelperDescriptor("p", "pTagHelper", "SomeAssembly", ContentBehavior.None)
                              });
         }
 
@@ -229,12 +232,13 @@ namespace Microsoft.AspNet.Razor.Test.Generator
             {
                 new TagHelperDescriptor("MyTagHelper",
                                         "MyTagHelper",
+                                        "SomeAssembly",
                                         ContentBehavior.None,
                                         new [] {
                                             new TagHelperAttributeDescriptor("BoundProperty",
                                                                              propertyInfo)
                                         }),
-                new TagHelperDescriptor("NestedTagHelper", "NestedTagHelper", ContentBehavior.Modify)
+                new TagHelperDescriptor("NestedTagHelper", "NestedTagHelper", "SomeAssembly", ContentBehavior.Modify)
             };
 
             // Act & Assert

test/Microsoft.AspNet.Razor.Test/Generator/TagHelperAttributeValueCodeRendererTest.cs

@@ -21,15 +21,17 @@ namespace Microsoft.AspNet.Razor.Test.Generator
             var checkedPropertyInfo = typeof(TestType).GetProperty("Checked");
             var tagHelperDescriptors = new TagHelperDescriptor[]
             {
-                new TagHelperDescriptor("p", "PTagHelper", ContentBehavior.None),
+                new TagHelperDescriptor("p", "PTagHelper", "SomeAssembly", ContentBehavior.None),
                 new TagHelperDescriptor("input",
                                         "InputTagHelper",
+                                        "SomeAssembly",
                                         ContentBehavior.None,
                                         new TagHelperAttributeDescriptor[] {
                                             new TagHelperAttributeDescriptor("type", inputTypePropertyInfo)
                                         }),
                 new TagHelperDescriptor("input",
                                         "InputTagHelper2",
+                                        "SomeAssembly",
                                         ContentBehavior.None,
                                         new TagHelperAttributeDescriptor[] {
                                             new TagHelperAttributeDescriptor("type", inputTypePropertyInfo),

test/Microsoft.AspNet.Razor.Test/TagHelpers/AddOrRemoveTagHelperSpanVisitorTest.cs

@@ -23,7 +23,7 @@ namespace Microsoft.AspNet.Razor.TagHelpers
         {
             get
             {
-                return new TagHelperDescriptor("p", "PTagHelper", ContentBehavior.None);
+                return new TagHelperDescriptor("p", "PTagHelper", "SomeAssembly", ContentBehavior.None);
             }
         }
 
@@ -31,7 +31,7 @@ namespace Microsoft.AspNet.Razor.TagHelpers
         {
             get
             {
-                return new TagHelperDescriptor("div", "DivTagHelper", ContentBehavior.None);
+                return new TagHelperDescriptor("div", "DivTagHelper", "SomeAssembly", ContentBehavior.None);
             }
         }
 

test/Microsoft.AspNet.Razor.Test/TagHelpers/TagHelperDescriptorProviderTest.cs

@@ -13,8 +13,8 @@ namespace Microsoft.AspNet.Razor.Test.TagHelpers
         public void TagHelperDescriptorProvider_GetTagHelpersReturnsNothingForUnregisteredTags()
         {
             // Arrange
-            var divDescriptor = new TagHelperDescriptor("div", "foo1", ContentBehavior.None);
+            var divDescriptor = new TagHelperDescriptor("div", "foo1", "SomeAssembly", ContentBehavior.None);
-            var spanDescriptor = new TagHelperDescriptor("span", "foo2", ContentBehavior.None);
+            var spanDescriptor = new TagHelperDescriptor("span", "foo2", "SomeAssembly", ContentBehavior.None);
             var descriptors = new TagHelperDescriptor[] { divDescriptor, spanDescriptor };
             var provider = new TagHelperDescriptorProvider(descriptors);
 
@@ -29,9 +29,9 @@ namespace Microsoft.AspNet.Razor.Test.TagHelpers
         public void TagHelperDescriptorProvider_GetTagHelpersDoesntReturnNonCatchAllTagsForCatchAll()
         {
             // Arrange
-            var divDescriptor = new TagHelperDescriptor("div", "foo1", ContentBehavior.None);
+            var divDescriptor = new TagHelperDescriptor("div", "foo1", "SomeAssembly", ContentBehavior.None);
-            var spanDescriptor = new TagHelperDescriptor("span", "foo2", ContentBehavior.None);
+            var spanDescriptor = new TagHelperDescriptor("span", "foo2", "SomeAssembly", ContentBehavior.None);
-            var catchAllDescriptor = new TagHelperDescriptor("*", "foo3", ContentBehavior.None);
+            var catchAllDescriptor = new TagHelperDescriptor("*", "foo3", "SomeAssembly", ContentBehavior.None);
             var descriptors = new TagHelperDescriptor[] { divDescriptor, spanDescriptor, catchAllDescriptor };
             var provider = new TagHelperDescriptorProvider(descriptors);
 
@@ -47,9 +47,9 @@ namespace Microsoft.AspNet.Razor.Test.TagHelpers
         public void TagHelperDescriptorProvider_GetTagHelpersReturnsCatchAllsWithEveryTagName()
         {
             // Arrange
-            var divDescriptor = new TagHelperDescriptor("div", "foo1", ContentBehavior.None);
+            var divDescriptor = new TagHelperDescriptor("div", "foo1", "SomeAssembly", ContentBehavior.None);
-            var spanDescriptor = new TagHelperDescriptor("span", "foo2", ContentBehavior.None);
+            var spanDescriptor = new TagHelperDescriptor("span", "foo2", "SomeAssembly", ContentBehavior.None);
-            var catchAllDescriptor = new TagHelperDescriptor("*", "foo3", ContentBehavior.None);
+            var catchAllDescriptor = new TagHelperDescriptor("*", "foo3", "SomeAssembly", ContentBehavior.None);
             var descriptors = new TagHelperDescriptor[] { divDescriptor, spanDescriptor, catchAllDescriptor };
             var provider = new TagHelperDescriptorProvider(descriptors);
 
@@ -73,7 +73,7 @@ namespace Microsoft.AspNet.Razor.Test.TagHelpers
         public void TagHelperDescriptorProvider_DuplicateDescriptorsAreNotPartOfTagHelperDescriptorPool()
         {
             // Arrange
-            var divDescriptor = new TagHelperDescriptor("div", "foo1", ContentBehavior.None);
+            var divDescriptor = new TagHelperDescriptor("div", "foo1", "SomeAssembly", ContentBehavior.None);
             var descriptors = new TagHelperDescriptor[] { divDescriptor, divDescriptor };
             var provider = new TagHelperDescriptorProvider(descriptors);
 

test/Microsoft.AspNet.Razor.Test/TagHelpers/TagHelperParseTreeRewriterTest.cs

@@ -1175,7 +1175,7 @@ namespace Microsoft.AspNet.Razor.Test.TagHelpers
             foreach (var tagName in tagNames)
             {
                 descriptors.Add(
-                    new TagHelperDescriptor(tagName, tagName + "taghelper", ContentBehavior.None));
+                    new TagHelperDescriptor(tagName, tagName + "taghelper", "SomeAssembly", ContentBehavior.None));
             }
 
             return new TagHelperDescriptorProvider(descriptors);