Initial Commit

Library/PackageCache/com.unity.ugui@1.0.0/Tests/Editor/CanvasRenderer/ParentCanvasIsSane.cs

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+using UnityEngine;
+using UnityEngine.TestTools;
+using NUnit.Framework;
+using System.Collections;
+using UnityEngine.UI;
+
+public class ParentCanvasIsSane
+{
+    GameObject rootCanvas;
+    GameObject rootObject;
+    GameObject child1;
+    CanvasGroup c1CanvasGroup;
+    GameObject child2;
+    GameObject child3;
+
+    [SetUp]
+    public void TestSetup()
+    {
+        // root GO
+        // root Canvas
+        //  L child1 GO (RectTransform, CanvasGroup)
+        //     L child2 GO (RectTransform)
+        //        L child3 GO (Image)
+
+        rootCanvas = new GameObject("root Canvas");
+        rootCanvas.AddComponent<Canvas>();
+        rootCanvas.AddComponent<CanvasScaler>();
+
+        rootObject = new GameObject("root GO");
+
+        child1 = new GameObject("child1 GO");
+        child1.AddComponent<RectTransform>();
+        c1CanvasGroup = child1.AddComponent<CanvasGroup>();
+
+        child2 = new GameObject("child2 GO");
+        child2.AddComponent<RectTransform>();
+
+        child3 = new GameObject("child3 GO");
+        child3.AddComponent<Image>();
+
+        child3.transform.SetParent(child2.transform);
+        child2.transform.SetParent(child1.transform);
+        child1.transform.SetParent(rootCanvas.transform);
+    }
+
+    [UnityTest]
+    public IEnumerator RecalculatingAlphaOnReparentedInactiveObjectsDoesNotCrash()
+    {
+        Assert.IsNotNull(child3.GetComponent<CanvasRenderer>());
+
+        c1CanvasGroup.alpha = 0.5f;
+        child1.SetActive(false);
+        child1.transform.SetParent(rootObject.transform, true);
+
+        // This will crash if child3.GetComponent<CanvasRenderer>().m_ParentCanvas is not null.
+        yield return null;
+    }
+}