Fix Add/inline using static directive (RR0014, RR0180) (#988)

ChangeLog.md

@@ -15,6 +15,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Fix ([RCS1080](https://github.com/JosefPihrt/Roslynator/blob/main/docs/analyzers/RCS1080.md)) when collection is derived from `List<T>` ([#986](https://github.com/josefpihrt/roslynator/pull/986).
 - Fix retrieving of trusted platform assemblies - separator differs by OS ([#987](https://github.com/josefpihrt/roslynator/pull/987).
+- Fix refactoring ([RR0014](https://github.com/JosefPihrt/Roslynator/blob/main/docs/analyzers/RR0014.md)) ([#988](https://github.com/josefpihrt/roslynator/pull/988).
+- Fix refactoring ([RR0180](https://github.com/JosefPihrt/Roslynator/blob/main/docs/analyzers/RR0180.md)) ([#988](https://github.com/josefpihrt/roslynator/pull/988).
 
 ## [4.1.2] - 2022-10-31
 

src/Refactorings/CSharp/Refactorings/AddUsingStaticDirectiveRefactoring.cs

@@ -18,24 +18,36 @@ public static async Task ComputeRefactoringsAsync(RefactoringContext context, Me
             if (memberAccess.Name?.IsMissing != false)
                 return;
 
-            memberAccess = GetTopmostMemberAccessExpression(memberAccess);
+            if (context.Span.IsBetweenSpans(memberAccess))
+            {
+                if (memberAccess.IsParentKind(SyntaxKind.SimpleMemberAccessExpression))
+                    memberAccess = (MemberAccessExpressionSyntax)memberAccess.Parent;
+            }
 
             if (!context.Span.IsBetweenSpans(memberAccess.Expression))
+            {
                 return;
+            }
 
             SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
 
-            var typeSymbol = semanticModel.GetSymbol(memberAccess.Expression, context.CancellationToken) as INamedTypeSymbol;
-
-            if (typeSymbol?.TypeKind != TypeKind.Class)
+            if (semanticModel.GetSymbol(memberAccess.Expression, context.CancellationToken) is not INamedTypeSymbol typeSymbol)
+            {
                 return;
+            }
 
-            if (!typeSymbol.IsStatic)
+            if (typeSymbol.TypeKind != TypeKind.Class
+                && typeSymbol.TypeKind != TypeKind.Struct)
+            {
                 return;
+            }
 
             if (!typeSymbol.DeclaredAccessibility.Is(Accessibility.Public, Accessibility.Internal))
                 return;
 
+            if (semanticModel.GetSymbol(memberAccess.Name, context.CancellationToken)?.IsStatic != true)
+                return;
+
             if (CSharpUtility.IsStaticClassInScope(memberAccess, typeSymbol, semanticModel, context.CancellationToken))
                 return;
 

src/Refactorings/CSharp/Refactorings/InlineUsingStaticDirectiveRefactoring.cs

@@ -56,7 +56,8 @@ internal static class InlineUsingStaticDirectiveRefactoring
 
             foreach (SyntaxNode descendant in node.DescendantNodes())
             {
-                if (!descendant.IsParentKind(SyntaxKind.SimpleMemberAccessExpression)
+                if ((!descendant.IsParentKind(SyntaxKind.SimpleMemberAccessExpression)
+                    || ((MemberAccessExpressionSyntax)descendant.Parent).Name != descendant)
                     && (descendant is SimpleNameSyntax name))
                 {
                     ISymbol symbol = semanticModel.GetSymbol(name, cancellationToken);

src/Tests/Refactorings.Tests/RR0014AddUsingDirectiveTests.cs → src/Tests/Refactorings.Tests/RR0013AddUsingDirectiveTests.cs

@@ -6,7 +6,7 @@
 
 namespace Roslynator.CSharp.Refactorings.Tests
 {
-    public class RR0014AddUsingDirectiveTests : AbstractCSharpRefactoringVerifier
+    public class RR0013AddUsingDirectiveTests : AbstractCSharpRefactoringVerifier
     {
         public override string RefactoringId { get; } = RefactoringIdentifiers.AddUsingDirective;
 

src/Tests/Refactorings.Tests/RR0014AddUsingStaticDirectiveTests.cs

@@ -0,0 +1,163 @@
+// Copyright (c) Josef Pihrt and Contributors. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System.Threading.Tasks;
+using Roslynator.Testing.CSharp;
+using Xunit;
+
+namespace Roslynator.CSharp.Refactorings.Tests
+{
+    public class RR0014AddUsingStaticDirectiveTests : AbstractCSharpRefactoringVerifier
+    {
+        public override string RefactoringId { get; } = RefactoringIdentifiers.AddUsingStaticDirective;
+
+        [Fact, Trait(Traits.Refactoring, RefactoringIdentifiers.AddUsingStaticDirective)]
+        public async Task Test_Math_Max()
+        {
+            await VerifyRefactoringAsync(@"
+using System;
+
+class C
+{
+    void M()
+    {
+        int max = [|Math|].Max(1, 2);
+    }
+}
+", @"
+using System;
+using static System.Math;
+
+class C
+{
+    void M()
+    {
+        int max = Max(1, 2);
+    }
+}
+", equivalenceKey: EquivalenceKey.Create(RefactoringId));
+        }
+
+        [Fact, Trait(Traits.Refactoring, RefactoringIdentifiers.AddUsingStaticDirective)]
+        public async Task Test_Math_Max2()
+        {
+            await VerifyRefactoringAsync(@"
+class C
+{
+    void M()
+    {
+        int max = [|System.Math|].Max(1, 2);
+    }
+}
+", @"using static System.Math;
+
+class C
+{
+    void M()
+    {
+        int max = Max(1, 2);
+    }
+}
+", equivalenceKey: EquivalenceKey.Create(RefactoringId));
+        }
+
+        [Fact, Trait(Traits.Refactoring, RefactoringIdentifiers.AddUsingStaticDirective)]
+        public async Task Test_Math_Max3()
+        {
+            await VerifyRefactoringAsync(@"
+class C
+{
+    void M()
+    {
+        int max = [|global::System.Math|].Max(1, 2);
+    }
+}
+", @"using static System.Math;
+
+class C
+{
+    void M()
+    {
+        int max = Max(1, 2);
+    }
+}
+", equivalenceKey: EquivalenceKey.Create(RefactoringId));
+        }
+
+        [Fact, Trait(Traits.Refactoring, RefactoringIdentifiers.AddUsingStaticDirective)]
+        public async Task Test_SimpleMemberAccessExpression()
+        {
+            await VerifyRefactoringAsync(@"
+using System;
+
+class C
+{
+    void M()
+    {
+        var x = [|StringComparer|].CurrentCulture.GetHashCode();
+    }
+}
+", @"
+using System;
+using static System.StringComparer;
+
+class C
+{
+    void M()
+    {
+        var x = CurrentCulture.GetHashCode();
+    }
+}
+", equivalenceKey: EquivalenceKey.Create(RefactoringId));
+        }
+
+        [Fact, Trait(Traits.Refactoring, RefactoringIdentifiers.AddUsingStaticDirective)]
+        public async Task Test_SimpleMemberAccessExpression2()
+        {
+            await VerifyRefactoringAsync(@"
+class C
+{
+    void M()
+    {
+        var x = [|System.StringComparer|].CurrentCulture.GetHashCode();
+    }
+}
+", @"using static System.StringComparer;
+
+class C
+{
+    void M()
+    {
+        var x = CurrentCulture.GetHashCode();
+    }
+}
+", equivalenceKey: EquivalenceKey.Create(RefactoringId));
+        }
+
+        [Fact, Trait(Traits.Refactoring, RefactoringIdentifiers.AddUsingStaticDirective)]
+        public async Task Test_Struct()
+        {
+            await VerifyRefactoringAsync(@"
+using System;
+
+class C
+{
+    void M()
+    {
+        var x = [|TimeSpan|].Zero;
+    }
+}
+", @"
+using System;
+using static System.TimeSpan;
+
+class C
+{
+    void M()
+    {
+        var x = Zero;
+    }
+}
+", equivalenceKey: EquivalenceKey.Create(RefactoringId));
+        }
+    }
+}

src/Tests/Refactorings.Tests/RR0180InlineUsingStaticDirectiveTests.cs

@@ -42,6 +42,70 @@ void M()
         Enumerable.Empty<object>();
     }
 }
+", equivalenceKey: EquivalenceKey.Create(RefactoringId));
+        }
+
+        [Fact, Trait(Traits.Refactoring, RefactoringIdentifiers.InlineUsingStaticDirective)]
+        public async Task Test2()
+        {
+            await VerifyRefactoringAsync(@"
+using System;
+using [||]static System.StringComparer;
+
+class C
+{
+    void M()
+    {
+        var a = CurrentCulture.GetHashCode();
+        var b = CurrentCulture;
+        var c = StringComparer.CurrentCulture;
+        var d = System.StringComparer.CurrentCulture;
+        var e = global::System.StringComparer.CurrentCulture;
+    }
+}
+", @"
+using System;
+
+class C
+{
+    void M()
+    {
+        var a = StringComparer.CurrentCulture.GetHashCode();
+        var b = StringComparer.CurrentCulture;
+        var c = StringComparer.CurrentCulture;
+        var d = System.StringComparer.CurrentCulture;
+        var e = global::System.StringComparer.CurrentCulture;
+    }
+}
+", equivalenceKey: EquivalenceKey.Create(RefactoringId));
+        }
+
+        [Fact, Trait(Traits.Refactoring, RefactoringIdentifiers.InlineUsingStaticDirective)]
+        public async Task Test_Math_Max()
+        {
+            await VerifyRefactoringAsync(@"
+using System;
+using [||]static System.Math;
+
+class C
+{
+    void M()
+    {
+        var max = Max(1, 2);
+        var min = Min(1, 2);
+    }
+}
+", @"
+using System;
+
+class C
+{
+    void M()
+    {
+        var max = Math.Max(1, 2);
+        var min = Math.Min(1, 2);
+    }
+}
 ", equivalenceKey: EquivalenceKey.Create(RefactoringId));
         }
     }