MaskTests.cs
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using System.Collections;
using System.Collections.Generic;
using System.IO;
using NUnit.Framework;
using UnityEditor;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.TestTools;
using UnityEngine.UI;
namespace Graphics
{
class MaskTests : IPrebuildSetup
{
GameObject m_PrefabRoot;
const string kPrefabPath = "Assets/Resources/MaskTestsPrefab.prefab";
Mask m_mask;
public void Setup()
{
#if UNITY_EDITOR
var rootGO = new GameObject("rootGo");
GameObject canvasGO = new GameObject("Canvas", typeof(RectTransform), typeof(Canvas));
canvasGO.transform.SetParent(rootGO.transform);
var canvas = canvasGO.GetComponent<Canvas>();
canvas.referencePixelsPerUnit = 100;
var gameObject = new GameObject("Mask", typeof(RectTransform), typeof(Mask), typeof(Image));
gameObject.transform.SetParent(canvasGO.transform);
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("MaskTestsPrefab")) as GameObject;
m_mask = m_PrefabRoot.GetComponentInChildren<Mask>();
}
[TearDown]
public void TearDown()
{
m_mask = null;
Object.DestroyImmediate(m_PrefabRoot);
}
[OneTimeTearDown]
public void OneTimeTearDown()
{
#if UNITY_EDITOR
AssetDatabase.DeleteAsset(kPrefabPath);
#endif
}
[UnityTest]
public IEnumerator GetModifiedMaterialReturnsOriginalMaterialWhenNoGraphicComponentIsAttached()
{
Object.Destroy(m_mask.gameObject.GetComponent<Image>());
yield return null;
Material material = new Material(Graphic.defaultGraphicMaterial);
Material modifiedMaterial = m_mask.GetModifiedMaterial(material);
Assert.AreEqual(material, modifiedMaterial);
}
private Dictionary<string, GameObject> CreateMaskHierarchy(string suffix, int hierarchyDepth)
{
var nameToObjectMapping = new Dictionary<string, GameObject>();
GameObject root = new GameObject("root", typeof(RectTransform), typeof(Canvas));
nameToObjectMapping["root"] = root;
GameObject current = root;
for (int i = 0; i < hierarchyDepth; i++)
{
string name = suffix + (i + 1);
var gameObject = new GameObject(name, typeof(RectTransform), typeof(Mask), typeof(Image));
gameObject.transform.SetParent(current.transform);
nameToObjectMapping[name] = gameObject;
current = gameObject;
}
return nameToObjectMapping;
}
[Test]
public void GetModifiedMaterialReturnsOriginalMaterialWhenDepthIsEightOrMore()
{
var objectsMap = CreateMaskHierarchy("subMask", 9);
Mask mask = objectsMap["subMask" + 9].GetComponent<Mask>();
Material material = new Material(Graphic.defaultGraphicMaterial);
Material modifiedMaterial = mask.GetModifiedMaterial(material);
Assert.AreEqual(material, modifiedMaterial);
}
[Test]
public void GetModifiedMaterialReturnsDesiredMaterialWithSingleMask()
{
Material material = new Material(Graphic.defaultGraphicMaterial);
Material modifiedMaterial = m_mask.GetModifiedMaterial(material);
Assert.AreNotEqual(material, modifiedMaterial);
Assert.AreEqual(1, modifiedMaterial.GetInt("_Stencil"));
Assert.AreEqual(StencilOp.Replace, (StencilOp)modifiedMaterial.GetInt("_StencilOp"));
Assert.AreEqual(CompareFunction.Always, (CompareFunction)modifiedMaterial.GetInt("_StencilComp"));
Assert.AreEqual(255, modifiedMaterial.GetInt("_StencilReadMask"));
Assert.AreEqual(255, modifiedMaterial.GetInt("_StencilWriteMask"));
Assert.AreEqual(ColorWriteMask.All, (ColorWriteMask)modifiedMaterial.GetInt("_ColorMask"));
Assert.AreEqual(1, modifiedMaterial.GetInt("_UseUIAlphaClip"));
Assert.IsTrue(modifiedMaterial.IsKeywordEnabled("UNITY_UI_ALPHACLIP"));
}
[Test]
public void GetModifiedMaterialReturnsDesiredMaterialWithMultipleMasks()
{
for (int i = 2; i < 8; i++)
{
var nodesMap = CreateMaskHierarchy("subMask", i);
Mask mask = nodesMap["subMask" + i].GetComponent<Mask>();
int stencilDepth = MaskUtilities.GetStencilDepth(mask.transform, nodesMap["root"].transform);
int desiredStencilBit = 1 << stencilDepth;
Material material = new Material(Graphic.defaultGraphicMaterial);
Material modifiedMaterial = mask.GetModifiedMaterial(material);
int stencil = modifiedMaterial.GetInt("_Stencil");
Assert.AreNotEqual(material, modifiedMaterial);
Assert.AreEqual(desiredStencilBit | (desiredStencilBit - 1), stencil);
Assert.AreEqual(StencilOp.Replace, (StencilOp)modifiedMaterial.GetInt("_StencilOp"));
Assert.AreEqual(CompareFunction.Equal, (CompareFunction)modifiedMaterial.GetInt("_StencilComp"));
Assert.AreEqual(desiredStencilBit - 1, modifiedMaterial.GetInt("_StencilReadMask"));
Assert.AreEqual(desiredStencilBit | (desiredStencilBit - 1), modifiedMaterial.GetInt("_StencilWriteMask"));
Assert.AreEqual(ColorWriteMask.All, (ColorWriteMask)modifiedMaterial.GetInt("_ColorMask"));
Assert.AreEqual(1, modifiedMaterial.GetInt("_UseUIAlphaClip"));
Assert.IsTrue(modifiedMaterial.IsKeywordEnabled("UNITY_UI_ALPHACLIP"));
}
}
[Test]
public void GraphicComponentWithMaskIsMarkedAsIsMaskingGraphicWhenEnabled()
{
var graphic = m_PrefabRoot.GetComponentInChildren<Image>();
Assert.AreEqual(true, graphic.isMaskingGraphic);
m_mask.enabled = false;
Assert.AreEqual(false, graphic.isMaskingGraphic);
}
}
}