Adding test ensuring datasets are generated on exiting play mode.

com.unity.perception/Tests/Editor/DatasetCaptureEditorTests.cs

 using System;
+using System.Collections;
+using System.IO;
+using UnityEngine;
+using UnityEngine.TestTools;
+    [TestFixture]
+    [Serializable]
+        [SerializeField]
+        string expectedDatasetPath;
         [Test]
         public void RegisterEgo_InEditMode_Throws()
         {
         public void RegisterMetricDefinition_InEditMode_Throws()
         {
             Assert.Throws<InvalidOperationException>(() => DatasetCapture.RegisterMetricDefinition(""));
+        }
+        [UnityTest]
+        public IEnumerator SimpleData_GeneratesFullDataset_OnExitPlaymode()
+        {
+            yield return new EnterPlayMode();
+            var ego = DatasetCapture.RegisterEgo("ego");
+            var sensor = DatasetCapture.RegisterSensor(ego, "camera", "", 0.1f, 0);
+            sensor.ReportCapture("file.txt", new SensorSpatialData());
+            expectedDatasetPath = DatasetCapture.OutputDirectory;
+            yield return new ExitPlayMode();
+            FileAssert.Exists(Path.Combine(expectedDatasetPath, "sensors.json"));
         }
     }
 }