add tests for File and test based operations. Only unzip to go

src/node/File.mjs

@@ -42,6 +42,14 @@ class File {
     get size() {
         return this.data.length;
     }
+
+    /**
+     * Return lastModified as Date
+     */
+    get lastModifiedDate() {
+        return new Date(this.lastModified);
+    }
+
 }
 
 export default File;

src/node/config/excludedOperations.mjs

@@ -13,12 +13,6 @@ export default  [
     "Label",
     "Comment",
 
-    // Exclude file ops until HTML5 File Object can be mimicked
-    // "Tar",
-    // "Untar",
-    "Unzip",
-    "Zip",
-
     // esprima doesn't work in .mjs
     "JavaScriptBeautify",
     "JavaScriptMinify",