Collate diagnositcs from Imports

src/Microsoft.AspNetCore.Razor.Evolution/DefaultRazorCSharpLoweringPhase.cs

@@ -3,7 +3,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using Microsoft.AspNetCore.Razor.Evolution.CodeGeneration;
 using Microsoft.AspNetCore.Razor.Evolution.Intermediate;
 using Microsoft.AspNetCore.Razor.Evolution.Legacy;
@@ -61,6 +60,12 @@ namespace Microsoft.AspNetCore.Razor.Evolution
 
             var diagnostics = new List<RazorDiagnostic>();
             diagnostics.AddRange(syntaxTree.Diagnostics);
+
+            var importSyntaxTrees = codeDocument.GetImportSyntaxTrees();
+            for (var i = 0; i < importSyntaxTrees?.Count; i++)
+            {
+                diagnostics.AddRange(importSyntaxTrees[i].Diagnostics);
+            }
             diagnostics.AddRange(renderingContext.Diagnostics);
 
             var csharpDocument = new RazorCSharpDocument()

src/Microsoft.AspNetCore.Razor.Evolution/RazorCSharpDocument.cs

@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System.Collections.Generic;
-using Microsoft.AspNetCore.Razor.Evolution.Legacy;
 
 namespace Microsoft.AspNetCore.Razor.Evolution
 {

test/Microsoft.AspNetCore.Razor.Evolution.Test/DefaultRazorCSharpLoweringPhaseTest.cs

@@ -2,11 +2,10 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
+using Microsoft.AspNetCore.Razor.Evolution.CodeGeneration;
 using Microsoft.AspNetCore.Razor.Evolution.Intermediate;
 using Microsoft.AspNetCore.Testing;
 using Xunit;
-using Microsoft.AspNetCore.Razor.Evolution.Legacy;
-using Microsoft.AspNetCore.Razor.Evolution.CodeGeneration;
 
 namespace Microsoft.AspNetCore.Razor.Evolution
 {
@@ -75,5 +74,73 @@ namespace Microsoft.AspNetCore.Razor.Evolution
                 $"The document of kind 'test' does not have a '{nameof(RuntimeTarget)}'. " +
                 $"The document classifier must set a value for '{nameof(DocumentIRNode.Target)}'.");
         }
+
+        [Fact]
+        public void Execute_CollatesSyntaxDiagnosticsFromSourceDocument()
+        {
+            // Arrange
+            var phase = new DefaultRazorCSharpLoweringPhase();
+            var engine = RazorEngine.CreateEmpty(b => b.Phases.Add(phase));
+            var codeDocument = TestRazorCodeDocument.Create("<p class=@(");
+            codeDocument.SetSyntaxTree(RazorSyntaxTree.Parse(codeDocument.Source));
+            var options = RazorParserOptions.CreateDefaultOptions();
+            var irDocument = new DocumentIRNode()
+            {
+                DocumentKind = "test",
+                Target = RuntimeTarget.CreateDefault(codeDocument, options),
+                Options = options,
+            };
+            codeDocument.SetIRDocument(irDocument);
+
+            // Act
+            phase.Execute(codeDocument);
+
+            // Assert
+            var csharpDocument = codeDocument.GetCSharpDocument();
+            var diagnostic = Assert.Single(csharpDocument.Diagnostics);
+            Assert.Equal(@"The explicit expression block is missing a closing "")"" character.  Make sure you have a matching "")"" character for all the ""("" characters within this block, and that none of the "")"" characters are being interpreted as markup.",
+                diagnostic.GetMessage());
+        }
+
+        [Fact]
+        public void Execute_CollatesSyntaxDiagnosticsFromImportDocuments()
+        {
+            // Arrange
+            var phase = new DefaultRazorCSharpLoweringPhase();
+            var engine = RazorEngine.CreateEmpty(b => b.Phases.Add(phase));
+
+            var codeDocument = TestRazorCodeDocument.CreateEmpty();
+            codeDocument.SetSyntaxTree(RazorSyntaxTree.Parse(codeDocument.Source));
+            codeDocument.SetImportSyntaxTrees(new[]
+            {
+                RazorSyntaxTree.Parse(TestRazorSourceDocument.Create("@ ")),
+                RazorSyntaxTree.Parse(TestRazorSourceDocument.Create("<p @(")),
+            });
+            var options = RazorParserOptions.CreateDefaultOptions();
+            var irDocument = new DocumentIRNode()
+            {
+                DocumentKind = "test",
+                Target = RuntimeTarget.CreateDefault(codeDocument, options),
+                Options = options,
+            };
+            codeDocument.SetIRDocument(irDocument);
+
+            // Act
+            phase.Execute(codeDocument);
+
+            // Assert
+            var csharpDocument = codeDocument.GetCSharpDocument();
+            Assert.Collection(csharpDocument.Diagnostics,
+                diagnostic =>
+                {
+                    Assert.Equal(@"A space or line break was encountered after the ""@"" character.  Only valid identifiers, keywords, comments, ""("" and ""{"" are valid at the start of a code block and they must occur immediately following ""@"" with no space in between.",
+                        diagnostic.GetMessage());
+                },
+                diagnostic =>
+                {
+                    Assert.Equal(@"The explicit expression block is missing a closing "")"" character.  Make sure you have a matching "")"" character for all the ""("" characters within this block, and that none of the "")"" characters are being interpreted as markup.",
+                        diagnostic.GetMessage());
+                });
+        }
     }
 }