Add C# 9 tests for S2092

sonaranalyzer-dotnet/tests/SonarAnalyzer.UnitTest/Rules/CookieShouldBeSecureTest.cs

@@ -64,6 +64,15 @@ public void CookiesShouldBeSecure_NetCore() =>
                 new CookieShouldBeSecure(AnalyzerConfiguration.AlwaysEnabled),
                 additionalReferences: GetAdditionalReferences_NetCore());
 
+        [TestMethod]
+        [TestCategory("Rule")]
+        public void CookiesShouldBeSecure_NetCore_CSharp9() =>
+            Verifier.VerifyAnalyzer(@"TestCases\CookieShouldBeSecure_NetCore.CSharp9.cs",
+                new CookieShouldBeSecure(AnalyzerConfiguration.AlwaysEnabled),
+                ParseOptionsHelper.FromCSharp9,
+                outputKind: OutputKind.ConsoleApplication,
+                additionalReferences: GetAdditionalReferences_NetCore());
+
         private static IEnumerable<MetadataReference> GetAdditionalReferences_NetCore() =>
             NuGetMetadataReference.MicrosoftAspNetCoreHttpFeatures(Constants.NuGetLatestVersion);
 

sonaranalyzer-dotnet/tests/SonarAnalyzer.UnitTest/TestCases/CookieShouldBeSecure_NetCore.CSharp9.cs

@@ -0,0 +1,32 @@
+using System;
+using Microsoft.AspNetCore.Http;
+
+CookieOptions topLevelStatement1 = new(); // FN
+CookieOptions topLevelStatement2 = new CookieOptions(); // Noncompliant
+
+class Program
+{
+    CookieOptions field1 = new(); // FN
+    CookieOptions field2;
+
+    CookieOptions Property0 { get; init; } = new CookieOptions(); // Noncompliant
+    CookieOptions Property1 { get; init; } = new (); // FN
+    CookieOptions Property2 { get; init; }
+
+    Program()
+    {
+        Property2.Secure = false; // Noncompliant
+    }
+
+    void InitializerSetsNotAllowedValue()
+    {
+        CookieOptions c0 = new () { Secure = false }; // FN
+        CookieOptions c1 = new () { HttpOnly = true }; // FN, as Secure is not set
+    }
+}
+
+// See https://github.com/dotnet/roslyn/issues/45510
+namespace System.Runtime.CompilerServices
+{
+    public class IsExternalInit { }
+}