[VFX] Add Template Validation Test

Add minimal coverage about not up to date template.

Author: PaulDemeulenaere

Tests/SRPTests/Packages/com.unity.testing.visualeffectgraph/Tests/Editor/VFXSanitizeTest.cs

@@ -1,6 +1,11 @@
-using System.Collections;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
 using NUnit.Framework;
+using UnityEngine;
 using UnityEngine.TestTools;
+using UnityEngine.VFX;
 
 namespace UnityEditor.VFX.Test
 {
@@ -23,5 +28,67 @@ public IEnumerator Check_SetCustomAttribute_Sanitize()
                 yield return null;
             Assert.IsNotNull(graph);
         }
+
+        [UnityTest,
+#if VFX_TESTS_HAS_URP
+    Ignore("See UUM-66527")
+#endif
+        ]
+        public IEnumerator Insure_Templates_Are_Up_To_Date()
+        {
+            var allTemplatesGUI = AssetDatabase.FindAssets("t:VisualEffectAsset", new []{ "Packages/com.unity.visualeffectgraph" });
+            var templatePath = new List<string>();
+            foreach (var guid in allTemplatesGUI)
+            {
+                var currentPath = AssetDatabase.GUIDToAssetPath(guid);
+                AssetDatabase.ImportAsset(currentPath);
+
+                var asset = AssetDatabase.LoadAssetAtPath<VisualEffectAsset>(currentPath);
+                Assert.IsNotNull(asset);
+
+                var resource = asset.GetResource();
+                EditorUtility.SetDirty(resource);
+                AssetDatabase.ImportAsset(currentPath);
+
+                templatePath.Add(currentPath);
+            }
+            AssetDatabase.SaveAssets();
+            Assert.AreNotEqual(0, templatePath.Count);
+            yield return null;
+
+            using (var process = new System.Diagnostics.Process())
+            {
+                var rootPath = Path.Combine(Application.dataPath, "../../../../../");
+                process.StartInfo = new System.Diagnostics.ProcessStartInfo
+                {
+                    CreateNoWindow = true,
+                    UseShellExecute = false,
+                    RedirectStandardError = true,
+                    RedirectStandardOutput = true,
+                    FileName = "git",
+                    Arguments = "diff Packages/com.unity.visualeffectgraph/**",
+                    WorkingDirectory = rootPath
+                };
+
+                var outputBuilder = new StringBuilder();
+                var errorsBuilder = new StringBuilder();
+                process.OutputDataReceived += (_, args) => outputBuilder.AppendLine(args.Data);
+                process.ErrorDataReceived += (_, args) => errorsBuilder.AppendLine(args.Data);
+
+                process.Start();
+                process.BeginOutputReadLine();
+                process.BeginErrorReadLine();
+                process.WaitForExit();
+
+                var output = outputBuilder.ToString().TrimEnd();
+                var errors = errorsBuilder.ToString().TrimEnd();
+
+                Assert.AreEqual(0, process.ExitCode);
+                Assert.AreEqual(string.Empty, errors);
+                Assert.AreEqual(string.Empty, output, output);
+            }
+            yield return null;
+        }
+
     }
 }