Update DiffTools.cs

Author: SimonCropp

src/DiffEngine/DiffTools.cs

@@ -35,8 +35,22 @@ public static void UseOrder(in bool throwForNoTool, params DiffTool[] order)
         InitTools(throwForNoTool, order);
     }
 
-    public static bool IsDetectedForFile(DiffTool diffTool, string path) =>
-        IsDetectedForExtension(diffTool, Path.GetExtension(path));
+    public static bool IsDetectedForFile(DiffTool diffTool, string path)
+    {
+        var tool = resolved.SingleOrDefault(_ => _.Tool == diffTool);
+        if (tool == null)
+        {
+            return false;
+        }
+
+        if (FileExtensions.IsTextFile(path))
+        {
+            return tool.SupportsText;
+        }
+
+        var extension = Path.GetExtension(path);
+        return tool.BinaryExtensions.Contains(extension);
+    }
 
     public static bool IsDetectedForExtension(DiffTool diffTool, string extension)
     {