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Library/PackageCache/com.unity.ugui@1.0.0/Tests/Runtime/Layout/HorizonalLayoutGroupTests.cs

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+using System.IO;
+using NUnit.Framework;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.TestTools;
+
+
+namespace LayoutTests
+{
+    public class HorizontalLayoutGroupTests : IPrebuildSetup
+    {
+        GameObject m_PrefabRoot;
+        const string kPrefabPath = "Assets/Resources/HorizontalLayoutGroupPrefab.prefab";
+
+        public void Setup()
+        {
+#if UNITY_EDITOR
+            var rootGO = new GameObject("rootGo");
+            var canvasGO = new GameObject("Canvas", typeof(Canvas));
+            canvasGO.transform.SetParent(rootGO.transform);
+
+            var groupGO = new GameObject("Group", typeof(RectTransform), typeof(HorizontalLayoutGroup));
+            groupGO.transform.SetParent(canvasGO.transform);
+            var horizontalLayoutGroup = groupGO.GetComponent<HorizontalLayoutGroup>();
+            horizontalLayoutGroup.padding = new RectOffset(2, 4, 3, 5);
+            horizontalLayoutGroup.spacing = 1;
+            horizontalLayoutGroup.childForceExpandWidth = false;
+            horizontalLayoutGroup.childForceExpandHeight = false;
+            horizontalLayoutGroup.childControlWidth = true;
+            horizontalLayoutGroup.childControlHeight = true;
+
+            var element1GO = new GameObject("Element1", typeof(RectTransform), typeof(LayoutElement));
+            element1GO.transform.SetParent(groupGO.transform);
+            var layoutElement1 = element1GO.GetComponent<LayoutElement>();
+            layoutElement1.minWidth = 5;
+            layoutElement1.minHeight = 10;
+            layoutElement1.preferredWidth = 100;
+            layoutElement1.preferredHeight = 50;
+            layoutElement1.flexibleWidth = 0;
+            layoutElement1.flexibleHeight = 0;
+
+            var element2GO = new GameObject("Element2", typeof(RectTransform), typeof(LayoutElement));
+            element2GO.transform.SetParent(groupGO.transform);
+            var layoutElement2 = element2GO.GetComponent<LayoutElement>();
+            layoutElement2.minWidth = 10;
+            layoutElement2.minHeight = 5;
+            layoutElement2.preferredWidth = -1;
+            layoutElement2.preferredHeight = -1;
+            layoutElement2.flexibleWidth = 0;
+            layoutElement2.flexibleHeight = 0;
+
+            var element3GO = new GameObject("Element3", typeof(RectTransform), typeof(LayoutElement));
+            element3GO.transform.SetParent(groupGO.transform);
+            var layoutElement3 = element3GO.GetComponent<LayoutElement>();
+            layoutElement3.minWidth = 25;
+            layoutElement3.minHeight = 15;
+            layoutElement3.preferredWidth = 200;
+            layoutElement3.preferredHeight = 80;
+            layoutElement3.flexibleWidth = 1;
+            layoutElement3.flexibleHeight = 1;
+
+            if (!Directory.Exists("Assets/Resources/"))
+                Directory.CreateDirectory("Assets/Resources/");
+
+            PrefabUtility.SaveAsPrefabAsset(rootGO, kPrefabPath);
+            GameObject.DestroyImmediate(rootGO);
+#endif
+        }
+
+        [SetUp]
+        public void TestSetup()
+        {
+            m_PrefabRoot = Object.Instantiate(Resources.Load("HorizontalLayoutGroupPrefab")) as GameObject;
+        }
+
+        [TearDown]
+        public void TearDown()
+        {
+            GameObject.DestroyImmediate(m_PrefabRoot);
+        }
+
+        [OneTimeTearDown]
+        public void OneTimeTearDown()
+        {
+#if UNITY_EDITOR
+            AssetDatabase.DeleteAsset(kPrefabPath);
+#endif
+        }
+
+        [Test]
+        public void TestCalculateLayoutInputHorizontal()
+        {
+            HorizontalLayoutGroup layoutGroup = m_PrefabRoot.GetComponentInChildren<HorizontalLayoutGroup>();
+            layoutGroup.CalculateLayoutInputHorizontal();
+            layoutGroup.SetLayoutHorizontal();
+            layoutGroup.CalculateLayoutInputVertical();
+            layoutGroup.SetLayoutVertical();
+
+            Assert.AreEqual(48, layoutGroup.minWidth);
+            Assert.AreEqual(318, layoutGroup.preferredWidth);
+            Assert.AreEqual(1, layoutGroup.flexibleWidth);
+        }
+
+        [Test]
+        public void TestCalculateLayoutInputVertical()
+        {
+            HorizontalLayoutGroup layoutGroup = m_PrefabRoot.GetComponentInChildren<HorizontalLayoutGroup>();
+            layoutGroup.CalculateLayoutInputHorizontal();
+            layoutGroup.SetLayoutHorizontal();
+            layoutGroup.CalculateLayoutInputVertical();
+            layoutGroup.SetLayoutVertical();
+
+            Assert.AreEqual(23, layoutGroup.minHeight);
+            Assert.AreEqual(88, layoutGroup.preferredHeight);
+            Assert.AreEqual(1, layoutGroup.flexibleHeight);
+            Assert.AreEqual(1, layoutGroup.flexibleHeight);
+        }
+
+        [Test]
+        public void TestCalculateLayoutHorizontal()
+        {
+            var parentGO = m_PrefabRoot.transform.GetChild(0).GetChild(0);
+            var element1GO = parentGO.GetChild(0);
+            var element1Trans = element1GO.GetComponent<RectTransform>();
+            var element2GO = parentGO.GetChild(1);
+            var element2Trans = element2GO.GetComponent<RectTransform>();
+            var element3GO = parentGO.GetChild(2);
+            var element3Trans = element3GO.GetComponent<RectTransform>();
+
+            HorizontalLayoutGroup layoutGroup = m_PrefabRoot.GetComponentInChildren<HorizontalLayoutGroup>();
+            layoutGroup.CalculateLayoutInputHorizontal();
+            layoutGroup.SetLayoutHorizontal();
+            layoutGroup.CalculateLayoutInputVertical();
+            layoutGroup.SetLayoutVertical();
+
+            Assert.AreEqual(13.6f, element1Trans.anchoredPosition.x, 0.1f);
+            Assert.AreEqual(31.3f, element2Trans.anchoredPosition.x, 0.1f);
+            Assert.AreEqual(66.6f, element3Trans.anchoredPosition.x, 0.1f);
+        }
+
+        [Test]
+        public void TestCalculateLayoutHorizontalReversed()
+        {
+            var parentGO = m_PrefabRoot.transform.GetChild(0).GetChild(0);
+            var element1GO = parentGO.GetChild(0);
+            var element1Trans = element1GO.GetComponent<RectTransform>();
+            var element2GO = parentGO.GetChild(1);
+            var element2Trans = element2GO.GetComponent<RectTransform>();
+            var element3GO = parentGO.GetChild(2);
+            var element3Trans = element3GO.GetComponent<RectTransform>();
+
+            HorizontalLayoutGroup layoutGroup = m_PrefabRoot.GetComponentInChildren<HorizontalLayoutGroup>();
+            layoutGroup.reverseArrangement = true;
+            layoutGroup.CalculateLayoutInputHorizontal();
+            layoutGroup.SetLayoutHorizontal();
+            layoutGroup.CalculateLayoutInputVertical();
+            layoutGroup.SetLayoutVertical();
+
+            Assert.AreEqual(84.4f, element1Trans.anchoredPosition.x, 0.1f);
+            Assert.AreEqual(66.7f, element2Trans.anchoredPosition.x, 0.1f);
+            Assert.AreEqual(31.4f, element3Trans.anchoredPosition.x, 0.1f);
+        }
+    }
+}