Add populateattachments flag

__tests__/utils.ts

@@ -10,6 +10,8 @@ import { PlainNormalizer, HTMLNormalizer } from "../src";
 const SENT_EML_NAME = "sent.eml";
 const RECEIVED_EML_NAME = "received.eml";
 
+const populateAttachments = false;
+
 expect.extend({
   toEqualWithDiff(target, source) {
     let pass = true;
@@ -46,10 +48,10 @@ export const getNormalizedPlain = (
   const receivedMime = getMime(`${testCasePath}/${RECEIVED_EML_NAME}`);
 
   const sentNormalizedPlain = PlainNormalizer.normalizePlain(
-    sentMime.getPlain(true)
+    sentMime.getPlain(populateAttachments)
   );
   const receivedNormalizedPlain = PlainNormalizer.normalizePlain(
-    receivedMime.getPlain(true)
+    receivedMime.getPlain(populateAttachments)
   );
 
   return {
@@ -74,8 +76,8 @@ export const getNormalizedHtml = (
   const sentMime = getMime(`${testCasePath}/${SENT_EML_NAME}`);
   const receivedMime = getMime(`${testCasePath}/${RECEIVED_EML_NAME}`);
 
-  const sentHtml = sentMime.getHTML(true);
-  const receivedHtml = receivedMime.getHTML(true);
+  const sentHtml = sentMime.getHTML(populateAttachments);
+  const receivedHtml = receivedMime.getHTML(populateAttachments);
 
   const sentDOM = new DOM(sentHtml);
   const receivedDOM = new JSDOM(receivedHtml);
@@ -233,8 +235,8 @@ export const getDOMDocuments = (
   const sentMime = getMime(`${testCasePath}/${SENT_EML_NAME}`);
   const receivedMime = getMime(`${testCasePath}/${RECEIVED_EML_NAME}`);
 
-  const sentDOM = new DOM(sentMime.getHTML(true));
-  const receivedDOM = new JSDOM(receivedMime.getHTML(true));
+  const sentDOM = new DOM(sentMime.getHTML(populateAttachments));
+  const receivedDOM = new JSDOM(receivedMime.getHTML(populateAttachments));
 
   return {
     sentHtmlDocument: sentDOM.window.document,