Fix empty line before #endregion (RCS0005)

ChangeLog.md

@@ -28,6 +28,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix [RCS1146](https://github.com/JosefPihrt/Roslynator/blob/main/docs/analyzers/RCS1146.md) ([#1098](https://github.com/JosefPihrt/Roslynator/pull/1098)).
 - Fix [RCS1154](https://github.com/JosefPihrt/Roslynator/blob/main/docs/analyzers/RCS1154.md) ([#1105](https://github.com/JosefPihrt/Roslynator/pull/1105)).
 - Fix [RCS1211](https://github.com/JosefPihrt/Roslynator/blob/main/docs/analyzers/RCS1211.md) ([#1095](https://github.com/JosefPihrt/Roslynator/pull/1095)).
+- Fix [RCS0005](https://github.com/JosefPihrt/Roslynator/blob/main/docs/analyzers/RCS0005.md) ([#1114](https://github.com/JosefPihrt/Roslynator/pull/1114)).
 
 ## [4.3.0] - 2023-04-24
 

src/Formatting.Analyzers/CSharp/AddBlankLineBeforeEndRegionDirectiveAnalyzer.cs

@@ -36,15 +36,15 @@ private static void AnalyzeEndRegionDirectiveTrivia(SyntaxNodeAnalysisContext co
     {
         var endRegionDirective = (EndRegionDirectiveTriviaSyntax)context.Node;
 
-        if (IsPrecededWithEmptyLineOrRegionDirective())
-            return;
-
-        DiagnosticHelpers.ReportDiagnostic(
-            context,
-            DiagnosticRules.AddBlankLineBeforeEndRegionDirective,
-            Location.Create(endRegionDirective.SyntaxTree, endRegionDirective.Span.WithLength(0)));
+        if (!IsPrecededWithEmptyLineOrRegionDirective(endRegionDirective))
+        {
+            DiagnosticHelpers.ReportDiagnostic(
+                context,
+                DiagnosticRules.AddBlankLineBeforeEndRegionDirective,
+                Location.Create(endRegionDirective.SyntaxTree, endRegionDirective.Span.WithLength(0)));
+        }
 
-        bool IsPrecededWithEmptyLineOrRegionDirective()
+        static bool IsPrecededWithEmptyLineOrRegionDirective(EndRegionDirectiveTriviaSyntax endRegionDirective)
         {
             SyntaxTrivia parentTrivia = endRegionDirective.ParentTrivia;
 
@@ -78,7 +78,10 @@ bool IsPrecededWithEmptyLineOrRegionDirective()
                         return false;
                     }
 
-                    return en.Current.IsEndOfLineTrivia();
+                    return en.Current.IsKind(
+                        SyntaxKind.EndOfLineTrivia,
+                        SyntaxKind.RegionDirectiveTrivia,
+                        SyntaxKind.EndRegionDirectiveTrivia);
                 }
             }
 

src/Tests/Formatting.Analyzers.Tests/RCS0005AddBlankLineBeforeEndRegionDirectiveTests.cs

@@ -192,6 +192,39 @@ void M()
 
     #endregion
 }
+");
+    }
+
+    [Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.AddBlankLineBeforeEndRegionDirective)]
+    public async Task TestNoDiagnostic_TwoEndRegions()
+    {
+        await VerifyNoDiagnosticAsync(@"
+#region
+class C
+{
+    #region
+    void M()
+    {
+    }
+
+    #endregion
+
+    #endregion
+}
+");
+    }
+
+    [Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.AddBlankLineBeforeEndRegionDirective)]
+    public async Task TestNoDiagnostic_EmptyRegions()
+    {
+        await VerifyNoDiagnosticAsync(@"
+    #region
+
+    #region
+
+    #endregion
+
+    #endregion
 ");
     }
 }