Add tests for fixed types to verify Events is non-null

Author: halter73

src/Security/Authentication/Negotiate/test/Negotiate.Test/NegotiateHandlerTests.cs

@@ -20,6 +20,13 @@ namespace Microsoft.AspNetCore.Authentication.Negotiate;
 
 public class NegotiateHandlerTests
 {
+    [Fact]
+    public void EventsPropertyIsInitializedOnConstruction()
+    {
+        var options = new NegotiateOptions();
+        Assert.NotNull(options.Events);
+    }
+
     [Fact]
     public async Task Anonymous_MissingConnectionFeatures_ThrowsNotSupported()
     {

src/Security/Authentication/test/CertificateTests.cs

@@ -22,6 +22,12 @@ namespace Microsoft.AspNetCore.Authentication.Certificate.Test;
 
 public class ClientCertificateAuthenticationTests
 {
+    [Fact]
+    public void EventsPropertyIsInitializedOnConstruction()
+    {
+        var options = new CertificateAuthenticationOptions();
+        Assert.NotNull(options.Events);
+    }
 
     [Fact]
     public async Task VerifySchemeDefaults()

src/Security/Authentication/test/JwtBearerTests.cs

@@ -33,15 +33,14 @@ public class JwtBearerTests : SharedAuthenticationTests<JwtBearerOptions>
 
     protected override void RegisterAuth(AuthenticationBuilder services, Action<JwtBearerOptions> configure)
     {
-        services.AddJwtBearer(o =>
-        {
-            ConfigureDefaults(o);
-            configure.Invoke(o);
-        });
+        services.AddJwtBearer(configure);
     }
 
-    private void ConfigureDefaults(JwtBearerOptions o)
+    [Fact]
+    public void EventsPropertyIsInitializedOnConstruction()
     {
+        var options = new JwtBearerOptions();
+        Assert.NotNull(options.Events);
     }
 
     [Fact]