Issue 5997 - Avoid including qunit files in release builds

tests/test_packagerWebExt.py

 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 import difflib
 import json
 import os
 import re
 import shutil
 import zipfile
@@ skipping 309 matching lines @@
     manifest = json.loads(package.read(os.path.join(prefix, 'manifest.json')))
     filenames = package.namelist()
     scripts = [
         'ext/common.js',
         'ext/background.js',
     ]
 
     assert (os.path.join(prefix, 'qunit/index.html') in filenames) == devenv
     assert (os.path.join(prefix, 'devenvPoller__.js') in filenames) == devenv
     assert (os.path.join(prefix, 'devenvVersion__') in filenames) == devenv
+    assert (os.path.join(prefix, 'qunit/tests.js') in filenames) == devenv
+    assert (os.path.join(prefix, 'qunit/tests.js.map') in filenames) == devenv
 
     if devenv:
         quint_index = package.read(os.path.join(prefix, 'qunit/index.html'))
         assert '../ext/common.js' in quint_index
         assert '../ext/background.js' in quint_index
 
         assert set(manifest['background']['scripts']) == set(
             scripts + ['devenvPoller__.js']
         )
     else:
@@ skipping 143 matching lines @@
             expected = os.path.join(
                 os.path.dirname(__file__),
                 'expecteddata',
                 filename.format(name, ext),
             )
 
             assert_manifest_content(
                 package.read(os.path.join(folder, '{}.{}'.format(name, ext))),
                 expected,
             )