Implement test code analyzer

2026-09-05 21:01:52 +00:00 · 2025-08-01 21:43:22 +02:00
parent c01ccf571e
commit 41dacf72b6
16 changed files with 1118 additions and 16 deletions
@@ -0,0 +1,33 @@
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+using System;
+using System.Collections.Immutable;
+
+namespace MakeConst.Test
+{
+    internal static class CSharpVerifierHelper
+    {
+        /// <summary>
+        /// By default, the compiler reports diagnostics for nullable reference types at
+        /// <see cref="DiagnosticSeverity.Warning"/>, and the analyzer test framework defaults to only validating
+        /// diagnostics at <see cref="DiagnosticSeverity.Error"/>. This map contains all compiler diagnostic IDs
+        /// related to nullability mapped to <see cref="ReportDiagnostic.Error"/>, which is then used to enable all
+        /// of these warnings for default validation during analyzer and code fix tests.
+        /// </summary>
+        internal static ImmutableDictionary<string, ReportDiagnostic> NullableWarnings { get; } = GetNullableWarningsFromCompiler();
+
+        private static ImmutableDictionary<string, ReportDiagnostic> GetNullableWarningsFromCompiler()
+        {
+            string[] args = { "/warnaserror:nullable" };
+            var commandLineArguments = CSharpCommandLineParser.Default.Parse(args, baseDirectory: Environment.CurrentDirectory, sdkDirectory: Environment.CurrentDirectory);
+            var nullableWarnings = commandLineArguments.CompilationOptions.SpecificDiagnosticOptions;
+
+            // Workaround for https://github.com/dotnet/roslyn/issues/41610
+            nullableWarnings = nullableWarnings
+                .SetItem("CS8632", ReportDiagnostic.Error)
+                .SetItem("CS8669", ReportDiagnostic.Error);
+
+            return nullableWarnings;
+        }
+    }
+}