PICARD-204: Support for recording-level original release date

Provide variables %_recordingoriginaldate% and %_releaseoriginaldate%.

test/test_mbjson.py

@@ -5,7 +5,7 @@
 # Copyright (C) 2017 Sambhav Kothari
 # Copyright (C) 2017, 2019 Laurent Monin
 # Copyright (C) 2018 Wieland Hoffmann
-# Copyright (C) 2018-2020 Philipp Wolfer
+# Copyright (C) 2018-2021 Philipp Wolfer
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -54,7 +54,7 @@ settings = {
     "standardize_instruments": True,
     "release_ars": True,
     "preferred_release_countries": [],
-    "artist_locale": 'en'
+    "artist_locale": 'en',
 }
 
 
@@ -190,6 +190,9 @@ class RecordingTest(MBJSONTest):
         self.assertEqual(m['~artists_sort'], 'Sheeran, Ed')
         self.assertEqual(m['~length'], '4:41')
         self.assertEqual(m['~recordingtitle'], 'Thinking Out Loud')
+        self.assertEqual(m['~recordingoriginaldate'], '2014-06-20')
+        self.assertNotIn('originaldate', m)
+        self.assertNotIn('originalyear', m)
         self.assertEqual(t.genres, {
             'blue-eyed soul': 1,
             'pop': 3})
@@ -357,6 +360,7 @@ class ReleaseGroupTest(MBJSONTest):
         r = ReleaseGroup("1")
         release_group_to_metadata(self.json_doc, m, r)
         self.assertEqual(m['musicbrainz_releasegroupid'], 'f5093c06-23e3-404f-aeaa-40f72885ee3a')
+        self.assertEqual(m['~releaseoriginaldate'], '1973-03-24')
         self.assertEqual(m['originaldate'], '1973-03-24')
         self.assertEqual(m['originalyear'], '1973')
         self.assertEqual(m['releasetype'], 'album')