UA-.NETStandard/tests/Opc.Ua.Core.Tests/Security/Identity/AccessTokenTests.cs

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using System;
using NUnit.Framework;
using Opc.Ua.Identity;

namespace Opc.Ua.Core.Tests.Security.Identity
{
    /// <summary>
    /// Tests for <see cref="AccessToken"/>: ownership, dispose semantics,
    /// argument validation.
    /// </summary>
    [TestFixture]
    [Category("Identity")]
    [Parallelizable]
    [SetCulture("en-us")]
    [SetUICulture("en-us")]
    public class AccessTokenTests
    {
        [Test]
        public void CtorRejectsNullProfileUri()
        {
            ArgumentNullException ex = Assert.Throws<ArgumentNullException>(
                () => new AccessToken(null!, [1, 2], DateTime.UtcNow, "user"))!;
            Assert.That(ex.ParamName, Is.EqualTo("profileUri"));
        }

        [Test]
        public void CtorRejectsNullTokenData()
        {
            ArgumentNullException ex = Assert.Throws<ArgumentNullException>(
                () => new AccessToken(Profiles.JwtUserToken, null!, DateTime.UtcNow, "user"))!;
            Assert.That(ex.ParamName, Is.EqualTo("tokenData"));
        }

        [Test]
        public void TokenDataExposesPayload()
        {
            byte[] payload = [0x10, 0x20, 0x30];

            using var token = new AccessToken(
                Profiles.JwtUserToken,
                payload,
                DateTime.UtcNow.AddMinutes(30),
                "alice");

            Assert.That(token.TokenData.ToArray(), Is.EqualTo(payload));
        }

        [Test]
        public void DisposeClearsTokenBytes()
        {
            byte[] payload = [0x10, 0x20, 0x30];
            var token = new AccessToken(
                Profiles.JwtUserToken,
                payload,
                DateTime.UtcNow.AddMinutes(30),
                "alice");

            token.Dispose();

            // The original buffer (now zeroed) is owned by the token.
            Assert.That(payload, Is.EqualTo(new byte[] { 0, 0, 0 }));
        }

        [Test]
        public void TokenDataAccessAfterDisposeThrows()
        {
            var token = new AccessToken(
                Profiles.JwtUserToken,
                [0xAA],
                DateTime.UtcNow,
                "alice");
            token.Dispose();

            Assert.That(
                () =>
                {
                    ReadOnlySpan<byte> _ = token.TokenData;
                },
                Throws.TypeOf<ObjectDisposedException>());
        }

        [Test]
        public void DisposeIsIdempotent()
        {
            var token = new AccessToken(
                Profiles.JwtUserToken,
                [0xAA],
                DateTime.UtcNow,
                "alice");

            token.Dispose();
            Assert.That(token.Dispose, Throws.Nothing);
        }

        [Test]
        public void NullDisplayNameDefaultsToEmpty()
        {
            using var token = new AccessToken(
                Profiles.JwtUserToken,
                [0x01],
                DateTime.MaxValue,
                null!);
            Assert.That(token.DisplayName, Is.EqualTo(string.Empty));
        }

        [Test]
        public void NullGrantedScopesDefaultsToEmptyArray()
        {
            using var token = new AccessToken(
                Profiles.JwtUserToken,
                [0x01],
                DateTime.MaxValue,
                "alice");
            Assert.That(token.GrantedScopes, Is.Empty);
        }
    }
}