Clean up AcademyFixedUpdateStepper when playmode changed (#4532)

* Destroy stepper when playmode change * Detroy stepper if it does not belong to the current Academy Co-authored-by: Chris Elion <chris.elion@unity3d.com>
4 年前 · 5bc169b4
--- a/.yamato/com.unity.ml-agents-test.yml
+++ b/.yamato/com.unity.ml-agents-test.yml
  - version: 2018.4
    # 2018.4 doesn't support code-coverage
    enableCodeCoverage: !!bool false
+    # We want some scene tests to run in the DevProject, but packages there only support 2019+
+    testProject: Project
+    testProject: DevProject
+    testProject: DevProject
+    testProject: DevProject
+
+    testProject: DevProject
+
 test_platforms:
  - name: win
    type: Unity::VM
    type: Unity::VM
    image: package-ci/ubuntu:stable
    flavor: b1.medium
+
 packages:
  - name: com.unity.ml-agents
    assembly: Unity.ML-Agents
    flavor: {{ platform.flavor}}
  commands:
    - npm install upm-ci-utils@stable -g --registry https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-npm
-    - upm-ci project test -u {{ editor.version }} --project-path Project --package-filter {{ package.name }} {{ coverageOptions }} --extra-utr-arg "reruncount=2"
+    - upm-ci project test -u {{ editor.version }} --project-path {{ editor.testProject }} --package-filter {{ package.name }} {{ coverageOptions }} --extra-utr-arg "reruncount=2"
    {% if editor.enableCodeCoverage %}
    - python3 ml-agents/tests/yamato/check_coverage_percent.py upm-ci~/test-results/ {{ package.minCoveragePct }}
    {% endif %}
      pull_request.target match "release.+") AND
      NOT pull_request.draft AND
      (pull_request.changes.any match "com.unity.ml-agents/**" OR
+       pull_request.changes.any match " {{ editor.testProject }}/**" OR
      {% if package.name == "com.unity.ml-agents.extensions" %}
        pull_request.changes.any match "com.unity.ml-agents.extensions/**" OR
      {% endif %}
    - python -m pip install unity-downloader-cli --index-url https://artifactory.prd.it.unity3d.com/artifactory/api/pypi/pypi/simple --upgrade
    - unity-downloader-cli -u trunk -c editor --wait --fast
    - npm install upm-ci-utils@stable -g --registry https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-npm
-    - upm-ci project test -u {{ editor.version }} --project-path Project --package-filter {{ package.name }} {{ coverageOptions }} --extra-utr-arg "reruncount=2"
+    - upm-ci project test -u {{ editor.version }} --project-path {{ editor.testProject }} --package-filter {{ package.name }} {{ coverageOptions }} --extra-utr-arg "reruncount=2"
    {% if editor.enableCodeCoverage %}
    - python3 ml-agents/tests/yamato/check_coverage_percent.py upm-ci~/test-results/ {{ package.minCoveragePct }}
    {% endif %}
--- a/DevProject/ProjectSettings/EditorBuildSettings.asset
+++ b/DevProject/ProjectSettings/EditorBuildSettings.asset
 EditorBuildSettings:
  m_ObjectHideFlags: 0
  serializedVersion: 2
-  m_Scenes: []
+  m_Scenes:
+  - enabled: 1
+    path: Assets/ML-Agents/Scripts/Tests/Runtime/AcademyTest/AcademyStepperTestScene.unity
+    guid: 9bafc50b1e55b43b2b1ae9620f1f8311
  m_configObjects: {}
--- a/com.unity.ml-agents/CHANGELOG.md
+++ b/com.unity.ml-agents/CHANGELOG.md
 camera frame. The scene is able to train with the provided default config file. (#4511)
 ### Bug Fixes
 #### com.unity.ml-agents (C#)
+ - Fixed a bug where accessing the Academy outside of play mode would cause the Academy to get stepped multiple times when in play mode. (#4532)
 #### ml-agents / ml-agents-envs / gym-unity (Python)


--- a/com.unity.ml-agents/Runtime/Academy.cs
+++ b/com.unity.ml-agents/Runtime/Academy.cs
    {
        void FixedUpdate()
        {
-            Academy.Instance.EnvironmentStep();
+            // Check if the stepper belongs to the current Academy and destroy it if it's not.
+            // This is to prevent from having leaked stepper from previous runs.
+            if (!Academy.IsInitialized || !Academy.Instance.IsStepperOwner(this))
+            {
+                Destroy(this.gameObject);
+            }
+            else
+            {
+                Academy.Instance.EnvironmentStep();
+            }
        }
    }

            Application.quitting += Dispose;

            LazyInitialize();
+
+#if UNITY_EDITOR
+            EditorApplication.playModeStateChanged += HandleOnPlayModeChanged;
+#endif
+
+#if UNITY_EDITOR
+        /// <summary>
+        /// Clean up the Academy when switching from edit mode to play mode
+        /// </summary>
+        /// <param name="state">State.</param>
+        void HandleOnPlayModeChanged(PlayModeStateChange state)
+        {
+            if (state == PlayModeStateChange.ExitingEditMode)
+            {
+                Dispose();
+            }
+        }
+#endif

        /// <summary>
        /// Initialize the Academy if it hasn't already been initialized.

            // Reset the Lazy instance
            s_Lazy = new Lazy<Academy>(() => new Academy());
+        }
+
+        /// <summary>
+        /// Check if the input AcademyFixedUpdateStepper belongs to this Academy.
+        /// </summary>
+        internal bool IsStepperOwner(AcademyFixedUpdateStepper stepper)
+        {
+            return GameObject.ReferenceEquals(stepper.gameObject, Academy.Instance.m_StepperObject);
        }
    }
 }
--- a/com.unity.ml-agents/Tests/Runtime/RuntimeAPITest.cs
+++ b/com.unity.ml-agents/Tests/Runtime/RuntimeAPITest.cs
        [SetUp]
        public static void Setup()
        {
+            if (Academy.IsInitialized)
+            {
+                Academy.Instance.Dispose();
+            }
            Academy.Instance.AutomaticSteppingEnabled = false;
        }

--- a/DevProject/Assets/ML-Agents/Scripts/Tests/Editor.meta
+++ b/DevProject/Assets/ML-Agents/Scripts/Tests/Editor.meta
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--- a/DevProject/Assets/ML-Agents/Scripts/Tests/Runtime.meta
+++ b/DevProject/Assets/ML-Agents/Scripts/Tests/Runtime.meta
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--- a/DevProject/Assets/ML-Agents/Scripts/Tests/Runtime/AcademyTest.meta
+++ b/DevProject/Assets/ML-Agents/Scripts/Tests/Runtime/AcademyTest.meta
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--- a/DevProject/Assets/ML-Agents/Scripts/Tests/Runtime/AcademyTest/AcademyStepperTest.cs
+++ b/DevProject/Assets/ML-Agents/Scripts/Tests/Runtime/AcademyTest/AcademyStepperTest.cs
+using System.Collections;
+using NUnit.Framework;
+using UnityEngine.TestTools;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+using Unity.MLAgents;
+#if UNITY_EDITOR
+using UnityEditor.SceneManagement;
+#endif
+
+namespace Tests
+{
+    public class AcademyStepperTest
+    {
+        [SetUp]
+        public void Setup()
+        {
+            SceneManager.LoadScene("ML-Agents/Scripts/Tests/Runtime/AcademyTest/AcademyStepperTestScene");
+        }
+
+        /// <summary>
+        /// Verify in each update, the Academy is only stepped once.
+        /// </summary>
+        [UnityTest]
+        public IEnumerator AcademyStepperCleanupPasses()
+        {
+            var academy = Academy.Instance;
+            int initStepCount = academy.TotalStepCount;
+            for (var i = 0; i < 5; i++)
+            {
+                yield return new WaitForFixedUpdate();
+                Assert.True(academy.TotalStepCount - initStepCount == i + 1);
+            }
+        }
+    }
+}
--- a/DevProject/Assets/ML-Agents/Scripts/Tests/Runtime/AcademyTest/AcademyStepperTest.cs.meta
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