Fix tests.

errors.js

@@ -75,6 +75,18 @@ const ErrMissingToken = new APIError('token is required', {
   status: 400
 });
 
+// ErrNoCommentFound is returned when trying to add a tag to a comment that does not exist.
+const ErrNoCommentFound = new APIError('comment does not exist', {
+  translation_key: 'COMMENT_NOT_FOUND',
+  status: 400
+});
+
+// ErrNoCommentFound is returned when trying to add a tag to a comment that does not exist.
+const ErrorTagNotAllowed = new APIError('tag not allowed', {
+  translation_key: 'TAG_NOT_ALLOWED',
+  status: 400
+});
+
 // ErrAssetCommentingClosed is returned when a comment or action is attempted on
 // a stream where commenting has been closed.
 class ErrAssetCommentingClosed extends APIError {
@@ -161,6 +173,8 @@ module.exports = {
   ErrMissingEmail,
   ErrMissingPassword,
   ErrMissingToken,
+  ErrNoCommentFound,
+  ErrorTagNotAllowed,
   ErrEmailTaken,
   ErrSpecialChars,
   ErrMissingUsername,