added test helpers to write image to disk easily

Assets/Tests/Helper.cs

@@ -0,0 +1,22 @@
+using System.IO;
+using UnityEngine;
+
+namespace Raindrop.Tests
+{
+    public class Helper
+    {
+        
+        //easily write to a file
+        //filePath = fully-specified file path
+        public static void WriteToFile(byte[] outbytes, string filePath)
+        {
+            //create parent subfolders
+            var parentDir = Path.GetDirectoryName(filePath);
+            System.IO.Directory.CreateDirectory(parentDir);
+                
+            //write file
+            System.IO.File.WriteAllBytes(filePath, outbytes);
+            Debug.Log($"write: {filePath} ");
+        }
+    }
+}

Assets/Tests/Helper.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 651250a02e4a4314917e0f38c7b077a8
+timeCreated: 1642607248

Assets/Tests/ImagingTests/ImagingTests.cs

@@ -97,17 +97,6 @@ namespace Raindrop.Tests.ImagingTests
 
             }
 
-            //filePath = fully-specified file path
-            private void WriteToFile(byte[] outbytes, string filePath)
-            {
-                //create parent subfolders
-                var parentDir = Path.GetDirectoryName(filePath);
-                System.IO.Directory.CreateDirectory(parentDir);
-                
-                //write file
-                System.IO.File.WriteAllBytes(filePath, outbytes);
-                Debug.Log($"write: {filePath} ");
-            }
 
 
             [Test]