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Packages/com.unity.xr.openxr/Tests/Runtime/WaitForNullXRLoader.cs

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+using System;
+using NUnit.Framework;
+using UnityEngine.XR.OpenXR.Features.Mock;
+using UnityEngine.XR.OpenXR.NativeTypes;
+
+namespace UnityEngine.XR.OpenXR.Tests
+{
+    /// <summary>
+    /// Custom yield instruction that waits for a null OpenXRLoaderBase after initialization has started.
+    /// </summary>
+    internal sealed class WaitForNullXRLoader : CustomYieldInstruction
+    {
+        private float m_Timeout = 0;
+
+        public bool m_startListening = false;
+
+        public WaitForNullXRLoader(float timeout = 5.0f)
+        {
+            m_Timeout = Time.realtimeSinceStartup + timeout;
+        }
+
+        public void StartListening()
+        {
+            m_startListening = true;
+        }
+
+        public override bool keepWaiting
+        {
+            get
+            {
+                // Wait until the coroutine is done
+                if (m_startListening && OpenXRLoaderBase.Instance == null)
+                {
+                    return false;
+                }
+
+                // Did we time out waiting?
+                if (Time.realtimeSinceStartup > m_Timeout)
+                {
+                    Assert.Fail("WaitForDestroyInstanceCall: Timeout");
+                    return false;
+                }
+
+                return true;
+            }
+        }
+    }
+}