UA-.NETStandard/Tests/Opc.Ua.History.Tests/DataAccessAnalogTests.cs

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

namespace Opc.Ua.History.Tests
{
    /// <summary>
    /// compliance tests for Data Access Analog, TwoState, and
    /// MultiState discrete nodes.
    /// </summary>
    [TestFixture]
    [Category("Conformance")]
    [Category("DataAccessAnalog")]
    public class DataAccessAnalogTests : TestFixture
    {
        [Test]
        public async Task ReadAnalogItemDoubleValueAsync()
        {
            NodeId nodeId = AnalogNodeId("DataAccess_AnalogType_Double");
            DataValue result =
                await ReadNodeValueAsync(nodeId).ConfigureAwait(false);
            Assert.That(StatusCode.IsGood(result.StatusCode), Is.True);
        }

        [Test]
        public async Task ReadAnalogItemEURangeAsync()
        {
            NodeId nodeId = AnalogNodeId("DataAccess_AnalogType_Double");
            NodeId euRangeId =
                await FindChildNodeAsync(nodeId, "EURange")
                    .ConfigureAwait(false);
            Assert.That(euRangeId.IsNull, Is.False,
                "EURange child not found.");

            DataValue result =
                await ReadNodeValueAsync(euRangeId).ConfigureAwait(false);
            Assert.That(StatusCode.IsGood(result.StatusCode), Is.True);

            Range range = result.GetValue<Range>(default);
            Assert.That(range, Is.Not.Null);
            Assert.That(range.High, Is.GreaterThanOrEqualTo(range.Low));
        }

        [Test]
        public async Task ReadAnalogItemEngineeringUnitsAsync()
        {
            NodeId nodeId = AnalogNodeId("DataAccess_AnalogType_Double");
            NodeId euId =
                await FindChildNodeAsync(nodeId, "EngineeringUnits")
                    .ConfigureAwait(false);
            Assert.That(euId.IsNull, Is.False,
                "EngineeringUnits child not found.");

            DataValue result =
                await ReadNodeValueAsync(euId).ConfigureAwait(false);
            Assert.That(StatusCode.IsGood(result.StatusCode), Is.True);
        }

        [Test]
        public async Task WriteAnalogItemWithinEURangeSucceedsAsync()
        {
            NodeId nodeId = AnalogNodeId("DataAccess_AnalogType_Double");
            const double testValue = 50.0;

            WriteResponse writeResponse = await Session.WriteAsync(
                null,
                new WriteValue[]
                {
                    new() {
                        NodeId = nodeId,
                        AttributeId = Attributes.Value,
                        Value = new DataValue(new Variant(testValue))
                    }
                }.ToArrayOf(),
                CancellationToken.None).ConfigureAwait(false);

            Assert.That(writeResponse.Results.Count, Is.EqualTo(1));
            if (!StatusCode.IsGood(writeResponse.Results[0]))
            {
                Assert.Fail(
                    $"Analog write not permitted: {writeResponse.Results[0]}");
            }
        }

        [Test]
        public async Task ReadAnalogItemInt32ValueAsync()
        {
            NodeId nodeId = AnalogNodeId("DataAccess_AnalogType_Int32");
            DataValue result =
                await ReadNodeValueAsync(nodeId).ConfigureAwait(false);
            Assert.That(StatusCode.IsGood(result.StatusCode), Is.True);
        }

        [Test]
        public async Task ReadAnalogItemHasTypeDefinitionAsync()
        {
            NodeId nodeId = AnalogNodeId("DataAccess_AnalogType_Double");

            BrowseResponse response = await Session.BrowseAsync(
                null, null, 0,
                new BrowseDescription[]
                {
                    new() {
                        NodeId = nodeId,
                        BrowseDirection = BrowseDirection.Forward,
                        ReferenceTypeId =
                            ReferenceTypeIds.HasTypeDefinition,
                        IncludeSubtypes = false,
                        NodeClassMask = 0,
                        ResultMask = (uint)BrowseResultMask.All
                    }
                }.ToArrayOf(),
                CancellationToken.None).ConfigureAwait(false);

            Assert.That(response.Results.Count, Is.EqualTo(1));
            Assert.That(
                response.Results[0].References.Count,
                Is.GreaterThan(0));
        }

        [Test]
        public async Task ReadTwoStateDiscreteValueAsync()
        {
            NodeId nodeId =
                AnalogNodeId("DataAccess_TwoStateDiscreteType_001");
            DataValue result =
                await ReadNodeValueAsync(nodeId).ConfigureAwait(false);
            if (!StatusCode.IsGood(result.StatusCode))
            {
                Assert.Ignore(
                    $"TwoState discrete node not accessible: {result.StatusCode}");
            }

            Assert.That(
                result.WrappedValue.TryGetValue(out bool _), Is.True);
        }

        [Test]
        public async Task ReadTwoStateDiscreteTrueStateAsync()
        {
            NodeId nodeId =
                AnalogNodeId("DataAccess_TwoStateDiscreteType_001");
            DataValue check =
                await ReadNodeValueAsync(nodeId).ConfigureAwait(false);
            if (!StatusCode.IsGood(check.StatusCode))
            {
                Assert.Ignore("TwoState discrete node not accessible.");
            }

            NodeId trueStateId =
                await FindChildNodeAsync(nodeId, "TrueState")
                    .ConfigureAwait(false);
            if (trueStateId.IsNull)
            {
                Assert.Ignore("TrueState child not found.");
            }

            DataValue result =
                await ReadNodeValueAsync(trueStateId).ConfigureAwait(false);
            Assert.That(StatusCode.IsGood(result.StatusCode), Is.True);
        }

        [Test]
        public async Task ReadTwoStateDiscreteFalseStateAsync()
        {
            NodeId nodeId =
                AnalogNodeId("DataAccess_TwoStateDiscreteType_001");
            DataValue check =
                await ReadNodeValueAsync(nodeId).ConfigureAwait(false);
            if (!StatusCode.IsGood(check.StatusCode))
            {
                Assert.Ignore("TwoState discrete node not accessible.");
            }

            NodeId falseStateId =
                await FindChildNodeAsync(nodeId, "FalseState")
                    .ConfigureAwait(false);
            if (falseStateId.IsNull)
            {
                Assert.Ignore("FalseState child not found.");
            }

            DataValue result =
                await ReadNodeValueAsync(falseStateId).ConfigureAwait(false);
            Assert.That(StatusCode.IsGood(result.StatusCode), Is.True);
        }

        [Test]
        public async Task WriteTwoStateDiscreteToggleAsync()
        {
            NodeId nodeId =
                AnalogNodeId("DataAccess_TwoStateDiscreteType_001");
            DataValue check =
                await ReadNodeValueAsync(nodeId).ConfigureAwait(false);
            if (!StatusCode.IsGood(check.StatusCode))
            {
                Assert.Ignore("TwoState discrete node not accessible.");
            }

            WriteResponse writeTrue = await Session.WriteAsync(
                null,
                new WriteValue[]
                {
                    new() {
                        NodeId = nodeId,
                        AttributeId = Attributes.Value,
                        Value = new DataValue(new Variant(true))
                    }
                }.ToArrayOf(),
                CancellationToken.None).ConfigureAwait(false);

            Assert.That(writeTrue.Results.Count, Is.EqualTo(1));
            if (!StatusCode.IsGood(writeTrue.Results[0]))
            {
                Assert.Ignore(
                    $"TwoState write not permitted: {writeTrue.Results[0]}");
            }
        }

        [Test]
        public async Task ReadMultiStateDiscreteValueAsync()
        {
            NodeId nodeId =
                AnalogNodeId("DataAccess_MultiStateDiscreteType_001");
            DataValue result =
                await ReadNodeValueAsync(nodeId).ConfigureAwait(false);
            if (!StatusCode.IsGood(result.StatusCode))
            {
                Assert.Ignore(
                    $"MultiState discrete node not accessible: {result.StatusCode}");
            }
        }

        [Test]
        public async Task ReadMultiStateDiscreteEnumStringsAsync()
        {
            NodeId nodeId =
                AnalogNodeId("DataAccess_MultiStateDiscreteType_001");
            DataValue check =
                await ReadNodeValueAsync(nodeId).ConfigureAwait(false);
            if (!StatusCode.IsGood(check.StatusCode))
            {
                Assert.Ignore("MultiState discrete node not accessible.");
            }

            NodeId enumStringsId =
                await FindChildNodeAsync(nodeId, "EnumStrings")
                    .ConfigureAwait(false);
            if (enumStringsId.IsNull)
            {
                Assert.Ignore("EnumStrings child not found.");
            }

            DataValue result =
                await ReadNodeValueAsync(enumStringsId).ConfigureAwait(false);
            Assert.That(StatusCode.IsGood(result.StatusCode), Is.True);
        }

        [Test]
        public async Task WriteMultiStateDiscreteValidIndexAsync()
        {
            NodeId nodeId =
                AnalogNodeId("DataAccess_MultiStateDiscreteType_001");
            DataValue check =
                await ReadNodeValueAsync(nodeId).ConfigureAwait(false);
            if (!StatusCode.IsGood(check.StatusCode))
            {
                Assert.Ignore("MultiState discrete node not accessible.");
            }

            WriteResponse writeResponse = await Session.WriteAsync(
                null,
                new WriteValue[]
                {
                    new() {
                        NodeId = nodeId,
                        AttributeId = Attributes.Value,
                        Value = new DataValue(new Variant((uint)0))
                    }
                }.ToArrayOf(),
                CancellationToken.None).ConfigureAwait(false);

            Assert.That(writeResponse.Results.Count, Is.EqualTo(1));
            if (!StatusCode.IsGood(writeResponse.Results[0]))
            {
                Assert.Ignore(
                    $"MultiState write not permitted: {writeResponse.Results[0]}");
            }
        }

        [Test]
        public async Task ReadAnalogItemArrayValueAsync()
        {
            NodeId nodeId =
                AnalogNodeId("DataAccess_AnalogType_Array_Double");
            DataValue result =
                await ReadNodeValueAsync(nodeId).ConfigureAwait(false);
            Assert.That(StatusCode.IsGood(result.StatusCode), Is.True);
        }

        [Test]
        public async Task ReadAnalogItemDefinitionPropertyAsync()
        {
            NodeId nodeId = AnalogNodeId("DataAccess_AnalogType_Double");
            NodeId definitionId =
                await FindChildNodeAsync(nodeId, "Definition")
                    .ConfigureAwait(false);

            if (definitionId.IsNull)
            {
                Assert.Ignore(
                    "Definition property not present on this node.");
                return;
            }

            DataValue result =
                await ReadNodeValueAsync(definitionId).ConfigureAwait(false);
            Assert.That(StatusCode.IsGood(result.StatusCode), Is.True);
        }

        private async Task<DataValue> ReadNodeValueAsync(NodeId nodeId)
        {
            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.Count, Is.EqualTo(1));
            return response.Results[0];
        }

        private async Task<NodeId> FindChildNodeAsync(
            NodeId parentId, string browseName)
        {
            BrowseResponse response = await Session.BrowseAsync(
                null, null, 0,
                new BrowseDescription[]
                {
                    new() {
                        NodeId = parentId,
                        BrowseDirection = BrowseDirection.Forward,
                        ReferenceTypeId =
                            ReferenceTypeIds.HierarchicalReferences,
                        IncludeSubtypes = true,
                        NodeClassMask = 0,
                        ResultMask = (uint)BrowseResultMask.All
                    }
                }.ToArrayOf(),
                CancellationToken.None).ConfigureAwait(false);

            Assert.That(response.Results.Count, Is.EqualTo(1));

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

            return NodeId.Null;
        }

        private NodeId AnalogNodeId(string identifier)
        {
            return ToNodeId(new ExpandedNodeId(
                identifier, Constants.ReferenceServerNamespaceUri));
        }
    }
}