Change code document provider to work in old Razor.

- Prior to this the old code document provider would utilize the editor factory service which would incorrectly create a parser for older Razor documents. This was wrong on many levels.
- Updated tests to react to new expectations.

src/Microsoft.VisualStudio.Editor.Razor/DefaultTextBufferCodeDocumentProvider.cs

@@ -12,19 +12,6 @@ namespace Microsoft.VisualStudio.Editor.Razor
     [Export(typeof(TextBufferCodeDocumentProvider))]
     internal class DefaultTextBufferCodeDocumentProvider : TextBufferCodeDocumentProvider
     {
-        private readonly RazorEditorFactoryService _editorFactoryService;
-
-        [ImportingConstructor]
-        public DefaultTextBufferCodeDocumentProvider(RazorEditorFactoryService editorFactoryService)
-        {
-            if (editorFactoryService == null)
-            {
-                throw new ArgumentNullException(nameof(editorFactoryService));
-            }
-
-            _editorFactoryService = editorFactoryService;
-        }
-
         public override bool TryGetFromBuffer(ITextBuffer textBuffer, out RazorCodeDocument codeDocument)
         {
             if (textBuffer == null)
@@ -32,7 +19,7 @@ namespace Microsoft.VisualStudio.Editor.Razor
                 throw new ArgumentNullException(nameof(textBuffer));
             }
 
-            if (_editorFactoryService.TryGetParser(textBuffer, out var parser) && parser.CodeDocument != null)
+            if (textBuffer.Properties.TryGetProperty(typeof(VisualStudioRazorParser), out VisualStudioRazorParser parser) && parser.CodeDocument != null)
             {
                 codeDocument = parser.CodeDocument;
                 return true;

test/Microsoft.VisualStudio.Editor.Razor.Test/DefaultTextBufferCodeDocumentProviderTest.cs

@@ -3,6 +3,7 @@
 
 using Microsoft.AspNetCore.Razor.Language;
 using Microsoft.VisualStudio.Text;
+using Microsoft.VisualStudio.Utilities;
 using Moq;
 using Xunit;
 
@@ -11,14 +12,17 @@ namespace Microsoft.VisualStudio.Editor.Razor
     public class DefaultTextBufferCodeDocumentProviderTest
     {
         [Fact]
-        public void TryGetFromBuffer_SucceedsIfParserFromProviderHasCodeDocument()
+        public void TryGetFromBuffer_SucceedsIfParserHasCodeDocument()
         {
             // Arrange
             var expectedCodeDocument = TestRazorCodeDocument.Create("Hello World");
             VisualStudioRazorParser parser = new DefaultVisualStudioRazorParser(expectedCodeDocument);
-            var parserProvider = Mock.Of<RazorEditorFactoryService>(p => p.TryGetParser(It.IsAny<ITextBuffer>(), out parser) == true);
+            var properties = new PropertyCollection()
-            var textBuffer = Mock.Of<ITextBuffer>();
+            {
-            var provider = new DefaultTextBufferCodeDocumentProvider(parserProvider);
+                [typeof(VisualStudioRazorParser)] = parser
+            };
+            var textBuffer = Mock.Of<ITextBuffer>(buffer => buffer.Properties == properties);
+            var provider = new DefaultTextBufferCodeDocumentProvider();
 
             // Act
             var result = provider.TryGetFromBuffer(textBuffer, out var codeDocument);
@@ -29,13 +33,16 @@ namespace Microsoft.VisualStudio.Editor.Razor
         }
 
         [Fact]
-        public void TryGetFromBuffer_FailsIfParserFromProviderMissingCodeDocument()
+        public void TryGetFromBuffer_FailsIfParserMissingCodeDocument()
         {
             // Arrange
             VisualStudioRazorParser parser = new DefaultVisualStudioRazorParser(codeDocument: null);
-            var parserProvider = Mock.Of<RazorEditorFactoryService>(p => p.TryGetParser(It.IsAny<ITextBuffer>(), out parser) == true);
+            var properties = new PropertyCollection()
-            var textBuffer = Mock.Of<ITextBuffer>();
+            {
-            var provider = new DefaultTextBufferCodeDocumentProvider(parserProvider);
+                [typeof(VisualStudioRazorParser)] = parser
+            };
+            var textBuffer = Mock.Of<ITextBuffer>(buffer => buffer.Properties == properties);
+            var provider = new DefaultTextBufferCodeDocumentProvider();
 
             // Act
             var result = provider.TryGetFromBuffer(textBuffer, out var codeDocument);
@@ -49,10 +56,8 @@ namespace Microsoft.VisualStudio.Editor.Razor
         public void TryGetFromBuffer_FailsIfNoParserIsAvailable()
         {
             // Arrange
-            VisualStudioRazorParser parser = null;
+            var textBuffer = Mock.Of<ITextBuffer>(buffer => buffer.Properties == new PropertyCollection());
-            var parserProvider = Mock.Of<RazorEditorFactoryService>(p => p.TryGetParser(It.IsAny<ITextBuffer>(), out parser) == false);
+            var provider = new DefaultTextBufferCodeDocumentProvider();
-            var textBuffer = Mock.Of<ITextBuffer>();
-            var provider = new DefaultTextBufferCodeDocumentProvider(parserProvider);
 
             // Act
             var result = provider.TryGetFromBuffer(textBuffer, out var codeDocument);