UA-.NETStandard/tests/Opc.Ua.OpenUsd.Tests/UsdViewOptionsTests.cs

/* ========================================================================
 * Copyright (c) 2005-2025 The OPC Foundation, Inc. All rights reserved.
 *
 * OPC Foundation MIT License 1.00
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * The complete license agreement can be found here:
 * http://opcfoundation.org/License/MIT/1.00/
 * ======================================================================*/

using NUnit.Framework;

namespace Opc.Ua.OpenUsd.Client.Tests
{
    /// <summary>
    /// Unit tests for viewport pick options and command fallback plumbing.
    /// </summary>
    [TestFixture]
    [Category("OpenUsd")]
    public sealed class UsdViewOptionsTests
    {
        [Test]
        public void DefaultsLeavePickingDisabled()
        {
            var options = new UsdViewOptions();

            Assert.That(options.StagePath, Is.Empty);
            Assert.That(options.PluginPath, Is.Null);
            Assert.That(options.Renderer, Is.Null);
            Assert.That(options.Title, Is.Null);
            Assert.That(options.CameraPath, Is.Null);
            Assert.That(options.Telemetry, Is.Null);
            Assert.That(options.PrimPicked, Is.Null);
            Assert.That(options.CommandPrimPath, Is.EqualTo("/World/IntentCommand"));
            Assert.That(options.PickMode, Is.EqualTo(UsdViewPickMode.Auto));
        }

        [Test]
        public void CommandFallbackRaisesOnceForChangedTarget()
        {
            string? lastTarget = null;

            bool first = UsdViewPickCommand.TryUpdatePickedPrim(
                "/World/RobotTargets/TargetA", ref lastTarget, emitInitialTarget: false,
                out string firstPick);
            bool second = UsdViewPickCommand.TryUpdatePickedPrim(
                "/World/RobotTargets/TargetB", ref lastTarget, emitInitialTarget: true,
                out string secondPick);

            Assert.That(first, Is.False);
            Assert.That(firstPick, Is.Empty);
            Assert.That(second, Is.True);
            Assert.That(secondPick, Is.EqualTo("/World/RobotTargets/TargetB"));
        }

        [Test]
        public void CommandFallbackIgnoresUnchangedTarget()
        {
            string? lastTarget = null;

            bool first = UsdViewPickCommand.TryUpdatePickedPrim(
                "/World/RobotTargets/TargetA", ref lastTarget, emitInitialTarget: true,
                out string firstPick);
            bool second = UsdViewPickCommand.TryUpdatePickedPrim(
                "/World/RobotTargets/TargetA", ref lastTarget, emitInitialTarget: true,
                out string secondPick);

            Assert.That(first, Is.True);
            Assert.That(firstPick, Is.EqualTo("/World/RobotTargets/TargetA"));
            Assert.That(second, Is.False);
            Assert.That(secondPick, Is.Empty);
        }

        [Test]
        public void CommandFallbackRejectsBlankRelativeAndWhitespaceTargets()
        {
            string? lastTarget = "/World/RobotTargets/TargetA";

            bool blank = UsdViewPickCommand.TryUpdatePickedPrim(
                " ",
                ref lastTarget,
                emitInitialTarget: true,
                out string blankPick);
            bool relative = UsdViewPickCommand.TryUpdatePickedPrim(
                "World/RobotTargets/TargetB",
                ref lastTarget,
                emitInitialTarget: true,
                out string relativePick);
            bool trimmed = UsdViewPickCommand.TryUpdatePickedPrim(
                " /World/RobotTargets/TargetC ",
                ref lastTarget,
                emitInitialTarget: true,
                out string trimmedPick);

            Assert.That(blank, Is.False);
            Assert.That(blankPick, Is.Empty);
            Assert.That(relative, Is.False);
            Assert.That(relativePick, Is.Empty);
            Assert.That(trimmed, Is.True);
            Assert.That(trimmedPick, Is.EqualTo("/World/RobotTargets/TargetC"));
        }
    }
}