Merge pull request #3749 from bjornhellander/feature/sa1118-collection-expression

Update SA1118 to allow multi-line collection expressions

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp12/ReadabilityRules/SA1118CSharp12UnitTests.cs

@@ -3,9 +3,41 @@
 
 namespace StyleCop.Analyzers.Test.CSharp12.ReadabilityRules
 {
+    using System.Threading;
+    using System.Threading.Tasks;
+    using Microsoft.CodeAnalysis.Testing;
     using StyleCop.Analyzers.Test.CSharp11.ReadabilityRules;
+    using Xunit;
+
+    using static StyleCop.Analyzers.Test.Verifiers.StyleCopDiagnosticVerifier<
+        StyleCop.Analyzers.ReadabilityRules.SA1118ParameterMustNotSpanMultipleLines>;
 
     public partial class SA1118CSharp12UnitTests : SA1118CSharp11UnitTests
     {
+        [Fact]
+        [WorkItem(3732, "https://github.com/DotNetAnalyzers/StyleCopAnalyzers/issues/3732")]
+        public async Task TestCollectionExpressionAsync()
+        {
+            var testCode = @"
+class Foo
+{
+    public void TestMethod()
+    {
+        AnotherMethod(
+            42,
+            [
+                1,
+                2,
+                3
+            ]);
+    }
+
+    public void AnotherMethod(int x, int[] y)
+    {
+    }
+}";
+
+            await VerifyCSharpDiagnosticAsync(testCode, DiagnosticResult.EmptyDiagnosticResults, CancellationToken.None).ConfigureAwait(false);
+        }
     }
 }

StyleCop.Analyzers/StyleCop.Analyzers/ReadabilityRules/SA1118ParameterMustNotSpanMultipleLines.cs

@@ -87,6 +87,7 @@ internal class SA1118ParameterMustNotSpanMultipleLines : DiagnosticAnalyzer
             SyntaxKind.ImplicitArrayCreationExpression,
             SyntaxKindEx.WithExpression,
             SyntaxKindEx.ImplicitObjectCreationExpression,
+            SyntaxKindEx.CollectionExpression,
         };
 
         /// <inheritdoc/>