Enable roslyn extension tests in CI (#5038)

* Enable roslyn extension tests in CI

* I'll be real I kinda just hoped that last one would work. dotnet test's --help documentation is useless garbage so I couldn't tell if that was supported or not. Guess not.

* Actually fix the Roslyn tests.

As far as I can tell, Roslyn tests haven't worked since #2976.

The tests used a pretty awful technique of linking the test code against the analyzer, so that the analyzer's copy of the relevant attributes got included into the test. This then broke when the namespace got changed by the linked PR.

Now the tests get an EmbeddedResource for the necessary test files compiled instead.

Also applied this to DependencyAssignAnalyzerTest because why not.

.github/workflows/build-test.yml

@@ -27,7 +27,8 @@ jobs:
       run: dotnet restore
     - name: Build
       run: dotnet build --no-restore /p:WarningsAsErrors=nullable
-    - name: Test Engine
+    - name: Robust.UnitTesting
       run: dotnet test --no-build Robust.UnitTesting/Robust.UnitTesting.csproj -- NUnit.ConsoleOut=0
-
+    - name: Robust.Analyzers.Tests
+      run: dotnet test --no-build Robust.Analyzers.Tests/Robust.Analyzers.Tests.csproj -- NUnit.ConsoleOut=0
 

Robust.Analyzers.Tests/AccessAnalyzer_Test.cs

@@ -20,11 +20,16 @@ public sealed class AccessAnalyzer_Test
         {
             TestState =
             {
-                AdditionalReferences = { typeof(AccessAnalyzer).Assembly },
                 Sources = { code }
             },
         };
 
+        TestHelper.AddEmbeddedSources(
+            test.TestState,
+            "Robust.Shared.Analyzers.AccessAttribute.cs",
+            "Robust.Shared.Analyzers.AccessPermissions.cs"
+        );
+
         // ExpectedDiagnostics cannot be set, so we need to AddRange here...
         test.TestState.ExpectedDiagnostics.AddRange(expected);
 

Robust.Analyzers.Tests/DependencyAssignAnalyzerTest.cs

@@ -12,28 +12,21 @@ namespace Robust.Analyzers.Tests;
 [TestFixture]
 public sealed class DependencyAssignAnalyzerTest
 {
-    private const string BaseCode = """
-        using System;
-
-        namespace Robust.Shared.IoC;
-
-        [AttributeUsage(AttributeTargets.Field)]
-        public sealed class DependencyAttribute : Attribute
-        {
-        }
-        """;
-
     private static Task Verifier(string code, params DiagnosticResult[] expected)
     {
         var test = new CSharpAnalyzerTest<DependencyAssignAnalyzer, NUnitVerifier>()
         {
             TestState =
             {
-                AdditionalReferences = { typeof(DependencyAssignAnalyzer).Assembly },
-                Sources = { code, BaseCode }
+                Sources = { code }
             },
         };
 
+        TestHelper.AddEmbeddedSources(
+            test.TestState,
+            "Robust.Shared.IoC.DependencyAttribute.cs"
+        );
+
         // ExpectedDiagnostics cannot be set, so we need to AddRange here...
         test.TestState.ExpectedDiagnostics.AddRange(expected);
 

Robust.Analyzers.Tests/Robust.Analyzers.Tests.csproj

@@ -6,6 +6,13 @@
   <Import Project="..\MSBuild\Robust.Properties.targets"/>
   <Import Project="..\MSBuild\Robust.Engine.props"/>
 
+  <!-- Engine source files needed to make the tests work -->
+  <ItemGroup>
+    <EmbeddedResource Include="..\Robust.Shared\Analyzers\AccessAttribute.cs" LogicalName="Robust.Shared.Analyzers.AccessAttribute.cs" LinkBase="Implementations" />
+    <EmbeddedResource Include="..\Robust.Shared\Analyzers\AccessPermissions.cs" LogicalName="Robust.Shared.Analyzers.AccessPermissions.cs" LinkBase="Implementations" />
+    <EmbeddedResource Include="..\Robust.Shared\IoC\DependencyAttribute.cs" LogicalName="Robust.Shared.IoC.DependencyAttribute.cs" LinkBase="Implementations" />
+  </ItemGroup>
+
   <PropertyGroup>
     <IsPackable>false</IsPackable>
   </PropertyGroup>

Robust.Analyzers.Tests/TestHelper.cs

@@ -0,0 +1,22 @@
+using System.Collections.Generic;
+using Microsoft.CodeAnalysis.Testing;
+using Microsoft.CodeAnalysis.Text;
+
+namespace Robust.Analyzers.Tests;
+
+public static class TestHelper
+{
+    public static void AddEmbeddedSources(SolutionState state, params string[] embeddedFiles)
+    {
+        AddEmbeddedSources(state, (IEnumerable<string>) embeddedFiles);
+    }
+
+    public static void AddEmbeddedSources(SolutionState state, IEnumerable<string> embeddedFiles)
+    {
+        foreach (var fileName in embeddedFiles)
+        {
+            using var stream = typeof(AccessAnalyzer_Test).Assembly.GetManifestResourceStream(fileName)!;
+            state.Sources.Add((fileName, SourceText.From(stream)));
+        }
+    }
+}

Robust.Analyzers/Robust.Analyzers.csproj

@@ -2,24 +2,29 @@
 
   <ItemGroup>
     <!-- Needed for NotNullableFlagAnalyzer. -->
-    <Compile Include="..\Robust.Shared\Analyzers\NotNullableFlagAttribute.cs" />
+    <Compile Include="..\Robust.Shared\Analyzers\NotNullableFlagAttribute.cs" LinkBase="Implementations" />
   </ItemGroup>
 
   <ItemGroup>
     <!-- Needed for FriendAnalyzer. -->
-    <Compile Include="..\Robust.Shared\Analyzers\AccessAttribute.cs" />
-    <Compile Include="..\Robust.Shared\Analyzers\AccessPermissions.cs" />
+    <Compile Include="..\Robust.Shared\Analyzers\AccessAttribute.cs" LinkBase="Implementations" />
+    <Compile Include="..\Robust.Shared\Analyzers\AccessPermissions.cs" LinkBase="Implementations" />
   </ItemGroup>
 
   <ItemGroup>
     <!-- Needed for PreferGenericVariantAnalyzer. -->
-    <Compile Include="..\Robust.Shared\Analyzers\PreferGenericVariantAttribute.cs" />
+    <Compile Include="..\Robust.Shared\Analyzers\PreferGenericVariantAttribute.cs" LinkBase="Implementations" />
   </ItemGroup>
 
   <Import Project="../Robust.Roslyn.Shared/Robust.Roslyn.Shared.props" />
 
   <PropertyGroup>
     <Nullable>disable</Nullable>
+    <!--
+    Rider seems to get really confused with hot reload if we directly compile in the above-linked classes.
+    As such, they have an #if to change their namespace in this project.
+    -->
+    <DefineConstants>$(DefineConstants);ROBUST_ANALYZERS_IMPL</DefineConstants>
   </PropertyGroup>
 
 </Project>

Robust.Shared/Analyzers/AccessAttribute.cs

@@ -1,6 +1,6 @@
 using System;
 
-#if NETSTANDARD2_0
+#if ROBUST_ANALYZERS_IMPL
 namespace Robust.Shared.Analyzers.Implementation;
 #else
 namespace Robust.Shared.Analyzers;

Robust.Shared/Analyzers/AccessPermissions.cs

@@ -1,6 +1,6 @@
 using System;
 
-#if NETSTANDARD2_0
+#if ROBUST_ANALYZERS_IMPL
 namespace Robust.Shared.Analyzers.Implementation;
 #else
 namespace Robust.Shared.Analyzers;

Robust.Shared/Analyzers/NotNullableFlagAttribute.cs

@@ -1,6 +1,6 @@
 using System;
 
-#if NETSTANDARD2_0
+#if ROBUST_ANALYZERS_IMPL
 namespace Robust.Shared.Analyzers.Implementation;
 #else
 namespace Robust.Shared.Analyzers;

Robust.Shared/Analyzers/PreferGenericVariantAttribute.cs

@@ -1,6 +1,6 @@
 using System;
 
-#if NETSTANDARD2_0
+#if ROBUST_ANALYZERS_IMPL
 namespace Robust.Shared.Analyzers.Implementation;
 #else
 namespace Robust.Shared.Analyzers;