override ToString() in the implementation classes of IAccessRule

Author: smdn

src/Smdn.Net.MuninNode/Smdn.Net.MuninNode.AccessRules/AddressListAccessRule.cs

@@ -52,4 +52,7 @@ public bool IsAcceptable(IPEndPoint remoteEndPoint)
 
     return false;
   }
+
+  public override string ToString()
+    => $"{{{nameof(AddressListAccessRule)}: {nameof(addressListAllowFrom)}={string.Join(", ", addressListAllowFrom)}; {nameof(shouldConsiderIPv4MappedIPv6Address)}={shouldConsiderIPv4MappedIPv6Address}}}";
 }

src/Smdn.Net.MuninNode/Smdn.Net.MuninNode.AccessRules/LoopbackOnlyAccessRule.cs

@@ -12,4 +12,7 @@ public bool IsAcceptable(IPEndPoint remoteEndPoint)
     => IPAddress.IsLoopback(
       (remoteEndPoint ?? throw new ArgumentNullException(nameof(remoteEndPoint))).Address
     );
+
+  public override string ToString()
+    => nameof(LoopbackOnlyAccessRule);
 }

tests/Smdn.Net.MuninNode/Smdn.Net.MuninNode.AccessRules/AddressListAccessRule.cs

@@ -0,0 +1,23 @@
+// SPDX-FileCopyrightText: 2025 smdn <smdn@smdn.jp>
+// SPDX-License-Identifier: MIT
+using System;
+using System.Net;
+
+using NUnit.Framework;
+
+namespace Smdn.Net.MuninNode.AccessRules;
+
+[TestFixture]
+public class AddressListAccessRuleTests {
+  [Test]
+  public new void ToString()
+  {
+    const string AllowFromAddressString = "192.0.2.1";
+
+    var options = new MuninNodeOptions().AllowFrom([IPAddress.Parse(AllowFromAddressString)]);
+
+    Assert.That(options.AccessRule!.ToString(), Is.Not.Empty);
+    Assert.That(options.AccessRule!.ToString(), Does.Contain("AddressListAccessRule"));
+    Assert.That(options.AccessRule!.ToString(), Does.Contain(AllowFromAddressString));
+  }
+}

tests/Smdn.Net.MuninNode/Smdn.Net.MuninNode.AccessRules/LoopbackOnlyAccessRule.cs

@@ -0,0 +1,20 @@
+// SPDX-FileCopyrightText: 2025 smdn <smdn@smdn.jp>
+// SPDX-License-Identifier: MIT
+using System;
+using System.Net;
+
+using NUnit.Framework;
+
+namespace Smdn.Net.MuninNode.AccessRules;
+
+[TestFixture]
+public class LoopbackOnlyAccessRuleTests {
+  [Test]
+  public new void ToString()
+  {
+    var options = new MuninNodeOptions().AllowFromLoopbackOnly();
+
+    Assert.That(options.AccessRule!.ToString(), Is.Not.Empty);
+    Assert.That(options.AccessRule!.ToString(), Does.Contain("LoopbackOnlyAccessRule"));
+  }
+}