Initial pass at embedded gfx test framework for

Assets/GraphicsTests.meta

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Assets/GraphicsTests/Editor.meta

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Assets/GraphicsTests/Editor/TestFramework.cs

+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using NUnit.Framework;
+using UnityEngine;
+using UnityEditor.SceneManagement;
+using Object = UnityEngine.Object;
+using System.Text.RegularExpressions;
+using UnityEngine.Experimental.Rendering;
+
+namespace UnityEditor.Experimental.Rendering
+{
+    public class GraphicsTests
+    {
+		// path where the tests live
+        private static readonly string[] s_Path =
+        {
+            "GraphicsTests",
+            "Scenes"
+        };
+
+		// info that gets generated for use
+		// in a dod way 
+        public struct TestInfo
+        {
+            public string name;
+            public float threshold;
+			public string relativePath;
+
+            public override string ToString()
+            {
+                return name;
+            }
+
+        }
+
+		// collect the scenes that we can use
+        public static class CollectScenes
+        {
+            public static IEnumerable scenes
+            {
+                get
+                {
+					// find all the scenes
+                    var absoluteScenesPath = s_Path.Aggregate(Application.dataPath, Path.Combine);
+					var allPaths = System.IO.Directory.GetFiles(absoluteScenesPath, "*.unity", System.IO.SearchOption.AllDirectories);
+                    
+					// construct all the needed test infos
+					foreach (var path in allPaths)
+                    {
+						var p = new FileInfo (path);
+						var split = s_Path.Aggregate ("", Path.Combine);
+						split = string.Format("{0}{1}", split, Path.DirectorySeparatorChar);
+						var splitPaths = Regex.Split (p.FullName, split);
+
+						yield return new TestInfo 
+						{
+							name = p.Name,
+							relativePath = splitPaths.Last(),
+							threshold = 0.02f
+						};
+                    }
+                }
+            }
+        }
+
+        [Test, TestCaseSource(typeof(CollectScenes), "scenes")]
+        public void TestScene(TestInfo testInfo)
+        {
+			var prjRelativeGraphsPath = s_Path.Aggregate("Assets", Path.Combine);
+			var filePath = Path.Combine(prjRelativeGraphsPath, testInfo.relativePath);
+
+			// open the scene
+            EditorSceneManager.OpenScene(filePath);
+
+			var testSetup = Object.FindObjectOfType<SetupSceneForRenderPipelineTest> ();
+			Assert.IsNotNull(testSetup, "No SetupSceneForRenderPipelineTest in scene " + testInfo.name);
+			Assert.IsNotNull(testSetup.cameraToUse, "No configured camera in <SetupSceneForRenderPipelineTest>");
+            
+			// render the scene
+			var tempTarget = RenderTexture.GetTemporary (testSetup.width, testSetup.height, 24);
+			var oldTarget = testSetup.cameraToUse.targetTexture;
+			testSetup.cameraToUse.targetTexture = tempTarget;
+			testSetup.cameraToUse.Render ();
+			testSetup.cameraToUse.targetTexture = oldTarget;
+
+			// Readback the rendered texture
+			var oldActive = RenderTexture.active;
+			RenderTexture.active = tempTarget;
+			var captured = new Texture2D(tempTarget.width, tempTarget.height, TextureFormat.ARGB32, false);
+			captured.ReadPixels(new Rect(0, 0, testSetup.width, testSetup.height), 0, 0);
+			RenderTexture.active = oldActive;
+
+            var rootPath = Directory.GetParent(Application.dataPath).ToString();
+            var templatePath = Path.Combine(rootPath.ToString(), "ImageTemplates");
+
+            // find the reference image
+			var dumpFileLocation = Path.Combine(templatePath, string.Format("{0}.{1}", testInfo.relativePath, "png"));
+			if (!File.Exists(dumpFileLocation))
+            {
+				// no reference exists, create it
+				var fileInfo = new FileInfo (dumpFileLocation);
+				fileInfo.Directory.Create();
+
+				var generated = captured.EncodeToPNG();
+                File.WriteAllBytes(dumpFileLocation, generated);
+				Assert.Fail("Template file not found for {0}, creating it at {1}.", testInfo.name, dumpFileLocation);
+            }
+
+            var template = File.ReadAllBytes(dumpFileLocation);
+            var fromDisk = new Texture2D(2, 2);
+            fromDisk.LoadImage(template, false);
+
+            var areEqual = CompareTextures(fromDisk, captured, testInfo.threshold);
+
+            if (!areEqual)
+            {
+                var failedPath = Path.Combine(rootPath.ToString(), "Failed");
+                Directory.CreateDirectory(failedPath);
+				var misMatchLocationResult = Path.Combine(failedPath, string.Format("{0}.{1}", testInfo.name, "png"));
+				var misMatchLocationTemplate = Path.Combine(failedPath, string.Format("{0}.template.{1}", testInfo.name, "png"));
+				var generated = captured.EncodeToPNG();
+                File.WriteAllBytes(misMatchLocationResult, generated);
+                File.WriteAllBytes(misMatchLocationTemplate, template);
+            }
+
+			Assert.IsTrue(areEqual, "Scene from {0}, did not match .template file.", testInfo.relativePath);
+        }
+
+		// compare textures, use RMS for this
+        private bool CompareTextures(Texture2D fromDisk, Texture2D captured, float threshold)
+        {
+            if (fromDisk == null || captured == null)
+                return false;
+
+            if (fromDisk.width != captured.width
+                || fromDisk.height != captured.height)
+                return false;
+
+            var pixels1 = fromDisk.GetPixels();
+            var pixels2 = captured.GetPixels();
+
+			if (pixels1.Length != pixels2.Length)
+				return false;
+			
+			int numberOfPixels = pixels1.Length;
+
+			float sumOfSquaredColorDistances = 0;
+			for (int i = 0; i < numberOfPixels; i++)
+			{
+				Color p1 = pixels1[i];
+				Color p2 = pixels2[i];
+
+				Color diff = p1 - p2;
+				diff = diff * diff;
+				sumOfSquaredColorDistances += (diff.r + diff.g + diff.b) / 3.0f;
+			}
+			float rmse = Mathf.Sqrt(sumOfSquaredColorDistances / numberOfPixels);
+			return rmse < threshold;
+        }
+    }
+}

Assets/GraphicsTests/Editor/TestFramework.cs.meta

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Assets/GraphicsTests/Scenes/LowEnd/SimpleCube.unity.meta

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Assets/GraphicsTests/SetupSceneForRenderPipelineTest.cs

+using UnityEngine;
+using UnityEngine.Rendering;
+using UnityEngine.Experimental.Rendering;
+
+namespace UnityEngine.Experimental.Rendering
+{
+	[ExecuteInEditMode]
+	public class SetupSceneForRenderPipelineTest : MonoBehaviour 
+	{
+		private RenderPipelineAsset m_OriginalAsset;
+		public RenderPipelineAsset renderPipeline;
+		public Camera cameraToUse;
+
+		public int width = 1280;
+		public int height = 720;
+
+		void OnEnable()
+		{
+			m_OriginalAsset = GraphicsSettings.renderPipelineAsset;
+			GraphicsSettings.renderPipelineAsset = renderPipeline;
+		}
+
+		void OnDisable()
+		{
+			GraphicsSettings.renderPipelineAsset = m_OriginalAsset;
+		}
+	}
+}

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