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

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using System.Threading;
using System.Threading.Tasks;
using NUnit.Framework;
using Opc.Ua.Client.TestFramework;
using ISession = Opc.Ua.Client.ISession;

namespace Opc.Ua.Core.Security.Tests
{
    [TestFixture]
    [Category("Conformance")]
    [Category("SecurityRoleServerDefaultPerms")]
    public class SecurityRoleServerDefaultPermsTests : TestFixture
    {
        [Test]
        public async Task DefaultPerms001CheckConfiguration()
        {
            NodeId namespacesId = ToNodeId(
                ObjectIds.Server_Namespaces);

            BrowseResponse response =
                await BrowseForwardAsync(namespacesId)
                    .ConfigureAwait(false);

            Assert.That(response.Results, Is.Not.Null);
            Assert.That(response.Results.Count,
                Is.GreaterThan(0));

            foreach (ReferenceDescription rd in
                response.Results[0].References.ToArray())
            {
                var nsNodeId = ExpandedNodeId.ToNodeId(
                    rd.NodeId, Session.NamespaceUris);
                NodeId propId = await FindChildAsync(
                    nsNodeId, "DefaultRolePermissions")
                    .ConfigureAwait(false);
                if (!propId.IsNull)
                {
                    DataValue dv =
                        await ReadPropertyValueAsync(propId)
                        .ConfigureAwait(false);
                    Assert.That(dv.StatusCode,
                        Is.EqualTo(StatusCodes.Good));
                    Assert.That(
                        dv.WrappedValue.TryGetValue(out ArrayOf<ExtensionObject> _), Is.True,
                        "DefaultRolePermissions should " +
                        "have a configured value.");
                    return;
                }
            }

            Assert.Fail(
                "No namespace exposes " +
                "DefaultRolePermissions property.");
        }

        private async Task<BrowseResponse> BrowseForwardAsync(
            NodeId nodeId,
            ISession session = null)
        {
            session ??= Session;
            return await session.BrowseAsync(
                null, null, 0,
                new BrowseDescription[]
                {
                    new() {
                        NodeId = nodeId,
                        BrowseDirection = BrowseDirection.Forward,
                        ReferenceTypeId =
                            ReferenceTypeIds.HierarchicalReferences,
                        IncludeSubtypes = true,
                        NodeClassMask = 0,
                        ResultMask = (uint)BrowseResultMask.All
                    }
                }.ToArrayOf(),
                CancellationToken.None).ConfigureAwait(false);
        }

        private async Task<NodeId> FindChildAsync(
            NodeId parentId,
            string childName,
            ISession session = null)
        {
            BrowseResponse response =
                await BrowseForwardAsync(parentId, session)
                    .ConfigureAwait(false);
            if (response?.Results == null ||
                response.Results.Count == 0)
            {
                return NodeId.Null;
            }

            foreach (ReferenceDescription rd in
                response.Results[0].References)
            {
                if (rd.BrowseName.Name == childName)
                {
                    return ExpandedNodeId.ToNodeId(
                        rd.NodeId,
                        (session ?? Session).NamespaceUris);
                }
            }

            return WellKnownRoleNodeIds.TryGetChild(parentId, childName);
        }

        private async Task<DataValue> ReadPropertyValueAsync(
            NodeId nodeId,
            ISession session = null)
        {
            session ??= Session;
            ReadResponse response = await session.ReadAsync(
                null, 0, TimestampsToReturn.Both,
                new ReadValueId[]
                {
                    new() {
                        NodeId = nodeId,
                        AttributeId = Attributes.Value
                    }
                }.ToArrayOf(),
                CancellationToken.None).ConfigureAwait(false);

            Assert.That(response.Results, Is.Not.Null);
            Assert.That(response.Results.Count, Is.EqualTo(1));
            return response.Results[0];
        }
    }
}