Initial Commit

Library/PackageCache/com.unity.ugui@1.0.0/Tests/Runtime/ScrollRect/ScrollRectStableLayout.cs

@@ -0,0 +1,128 @@
+using System.IO;
+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.TestTools;
+using NUnit.Framework;
+using System.Collections;
+using UnityEditor;
+
+/*
+ This test checks if a clamped scrollRect with a content rect that has the same width and a canvas with scaling will stay stable for 5 frames.
+ Test for case (1010178-Clamped ScrollRect with scalling cause a large spike in performance)
+*/
+
+public class ScrollRectStableLayout : IPrebuildSetup
+{
+    GameObject m_PrefabRoot;
+    GameObject m_CameraGO;
+
+    const string kPrefabPath = "Assets/Resources/ScrollRectStableLayoutPrefab.prefab";
+
+    public void Setup()
+    {
+#if UNITY_EDITOR
+        var rootGO = new GameObject("RootGO");
+        var rootCanvasGO = new GameObject("Canvas", typeof(Canvas), typeof(CanvasScaler));
+        rootCanvasGO.transform.SetParent(rootGO.transform);
+        var canvas = rootCanvasGO.GetComponent<Canvas>();
+        canvas.renderMode = RenderMode.ScreenSpaceOverlay;
+        var canvasScaler = rootCanvasGO.GetComponent<CanvasScaler>();
+        canvasScaler.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
+        canvasScaler.referenceResolution = new Vector2(3840, 2160);
+        canvasScaler.referencePixelsPerUnit = 128;
+
+        var scrollRectGo = new GameObject("Scroll View", typeof(ScrollRect));
+        var scrollRectTransform = scrollRectGo.GetComponent<RectTransform>();
+        scrollRectTransform.SetParent(rootCanvasGO.transform);
+        scrollRectTransform.localPosition = Vector3.zero;
+        scrollRectTransform.sizeDelta = new Vector2(1000, 1000);
+        scrollRectTransform.localScale = Vector3.one * 1.000005f;
+        var scrollRect = scrollRectGo.GetComponent<ScrollRect>();
+        scrollRect.horizontal = true;
+        scrollRect.vertical = true;
+        scrollRect.movementType = ScrollRect.MovementType.Clamped;
+        scrollRect.inertia = true;
+
+        var viewportTransform = new GameObject("Viewport", typeof(RectTransform)).GetComponent<RectTransform>();
+        viewportTransform.SetParent(scrollRectTransform);
+        viewportTransform.localPosition = Vector3.zero;
+        viewportTransform.localScale = Vector3.one;
+        viewportTransform.sizeDelta = new Vector2(-17, 0);
+        viewportTransform.anchorMin = new Vector2(0, 0);
+        viewportTransform.anchorMax = new Vector2(1, 1);
+        viewportTransform.pivot = new Vector2(0, 1);
+        scrollRect.viewport = viewportTransform;
+
+        var contentGo = new GameObject("Content", typeof(GridLayoutGroup));
+        var contentTransform = contentGo.GetComponent<RectTransform>();
+        contentTransform.SetParent(viewportTransform);
+        contentTransform.localPosition = Vector3.zero;
+        contentTransform.localScale = Vector3.one;
+        contentTransform.sizeDelta = new Vector2(0, 300);
+        contentTransform.anchorMin = new Vector2(0, 1);
+        contentTransform.anchorMax = new Vector2(1, 1);
+        contentTransform.pivot = new Vector2(0, 1);
+        var gridLayout = contentGo.GetComponent<GridLayoutGroup>();
+        gridLayout.cellSize = new Vector2(100, 100);
+        gridLayout.startCorner = GridLayoutGroup.Corner.UpperLeft;
+        gridLayout.startAxis = GridLayoutGroup.Axis.Horizontal;
+        gridLayout.childAlignment = TextAnchor.UpperLeft;
+        gridLayout.constraint = GridLayoutGroup.Constraint.Flexible;
+        scrollRect.content = contentTransform;
+
+        for (int i = 0; i < 20; i++)
+        {
+            var go = new GameObject("GameObject (" + i + ")", typeof(RectTransform));
+            var t = go.GetComponent<RectTransform>();
+            t.SetParent(contentTransform);
+            t.localScale = Vector3.one;
+            t.pivot = new Vector2(0.5f, 0.5f);
+        }
+
+        if (!Directory.Exists("Assets/Resources/"))
+            Directory.CreateDirectory("Assets/Resources/");
+
+        UnityEditor.PrefabUtility.SaveAsPrefabAsset(rootGO, kPrefabPath);
+        GameObject.DestroyImmediate(rootGO);
+#endif
+    }
+
+    [SetUp]
+    public void TestSetup()
+    {
+        m_PrefabRoot = Object.Instantiate(Resources.Load("ScrollRectStableLayoutPrefab")) as GameObject;
+        m_CameraGO = new GameObject("Camera", typeof(Camera));
+    }
+
+    [UnityTest]
+    public IEnumerator ScrollRect_StableWhenStatic()
+    {
+        //root->canvas->scroll view->viewport->content
+        RectTransform t = m_PrefabRoot.transform.GetChild(0).GetChild(0).GetChild(0).GetChild(0) as RectTransform;
+        float[] values = new float[5];
+        for (int i = 0; i < values.Length; i++)
+        {
+            values[i] = t.localPosition.y;
+            yield return null;
+        }
+        Assert.AreEqual(values[0], values[1]);
+        Assert.AreEqual(values[1], values[2]);
+        Assert.AreEqual(values[2], values[3]);
+        Assert.AreEqual(values[3], values[4]);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        Object.DestroyImmediate(m_PrefabRoot);
+        GameObject.DestroyImmediate(m_CameraGO);
+    }
+
+    [OneTimeTearDown]
+    public void OneTimeTearDown()
+    {
+#if UNITY_EDITOR
+        AssetDatabase.DeleteAsset(kPrefabPath);
+#endif
+    }
+}