Added a test to make sure pickled doctrees still have their uids

tests/test_versioning.py

@@ -8,10 +8,14 @@
     :copyright: Copyright 2007-2010 by the Sphinx team, see AUTHORS.
     :license: BSD, see LICENSE for details.
 """
+import pickle
+
 from util import *
 
 from docutils.statemachine import ViewList
+from docutils.parsers.rst.directives.html import MetaBody
 
+from sphinx import addnodes
 from sphinx.versioning import make_diff, add_uids, merge_doctrees
 
 def setup_module():
@@ -50,6 +54,19 @@ def is_paragraph(node):
 def test_add_uids():
     assert len(original_uids) == 3
 
+def test_picklablility():
+    # we have to modify the doctree so we can pickle it
+    copy = original.copy()
+    copy.reporter = None
+    copy.transformer = None
+    copy.settings.warning_stream = None
+    copy.settings.env = None
+    copy.settings.record_dependencies = None
+    for metanode in copy.traverse(MetaBody.meta):
+        metanode.__class__ = addnodes.meta
+    loaded = pickle.loads(pickle.dumps(copy, pickle.HIGHEST_PROTOCOL))
+    assert all(getattr(n, 'uid', False) for n in loaded.traverse(is_paragraph))
+
 def test_modified():
     modified = doctrees['versioning/modified']
     new_nodes = list(merge_doctrees(original, modified, is_paragraph))