Issue 5383 - Add tests for the Chrome and Firefox packagers

tests/tools.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 os
+import shutil
+
+
+def get_leafs_string(tree):
+    """Recursively builds a string, representing the path to all leaf-nodes"""
+    root_str = '{}|{}|{}'.format(tree.tag, tree.tail, tree.text).strip()
+    result = []
+
+    if len(tree) > 0:
+        for subtree in tree:
+            for leaf in get_leafs_string(subtree):
+                result.append('{}__{}'.format(root_str, leaf))
+    else:
+        result.append(root_str)
+    return result
+
+
+def copy_metadata(filename, tmpdir):
+    path = os.path.join(os.path.dirname(__file__), filename)
+    destination = str(tmpdir.join(filename))
+    shutil.copy(path, destination)