Partial fix for issue #247 on Mojave

tests/Test-10.14.6.photoslibrary/private/com.apple.photoanalysisd/GraphService/PhotoAnalysisServicePreferences.plist

@@ -3,8 +3,8 @@
 <plist version="1.0">
 <dict>
 	<key>PhotoAnalysisGraphLastBackgroundGraphRebuildJobDate</key>
-	<date>2020-10-09T16:14:42Z</date>
+	<date>2020-11-01T02:34:49Z</date>
 	<key>PhotoAnalysisGraphLastBackgroundMemoryGenerationJobDate</key>
-	<date>2020-10-10T05:21:03Z</date>
+	<date>2020-11-01T02:34:49Z</date>
 </dict>
 </plist>

tests/Test-10.14.6.photoslibrary/resources/moments/analysismetadata.plist

@@ -11,6 +11,6 @@
 	<key>PLLastRevGeoForcedProviderOutOfDateCheckVersionKey</key>
 	<integer>1</integer>
 	<key>PLLastRevGeoVerFileFetchDateKey</key>
-	<date>2020-10-04T23:43:17Z</date>
+	<date>2020-11-01T02:34:46Z</date>
 </dict>
 </plist>

tests/Test-10.14.6.photoslibrary/resources/recovery/Info.plist

@@ -24,7 +24,7 @@
 	<key>SnapshotCompletedDate</key>
 	<date>2019-07-27T13:16:43Z</date>
 	<key>SnapshotLastValidated</key>
-	<date>2020-10-10T05:22:36Z</date>
+	<date>2020-11-01T02:34:46Z</date>
 	<key>SnapshotTables</key>
 	<dict/>
 </dict>

tests/test_mojave_10_14_6.py

@@ -1,6 +1,10 @@
+""" Test basic methods for Mojave 10.14.6 """
+
+import datetime
+from collections import namedtuple
+
 import pytest
 
-from collections import namedtuple
 from osxphotos._constants import _UNKNOWN_PERSON
 
 PHOTOS_DB = "./tests/Test-10.14.6.photoslibrary/database/photos.db"
@@ -535,6 +539,31 @@ def test_date_modified_invalid(photosdb):
     assert p.date_modified is None
 
 
+def test_date_modified(photosdb):
+    """ Test date modified for photo that has been edited """
+
+    photos = photosdb.photos(uuid=[UUID_DICT["has_adjustments"]])
+    p = photos[0]
+    assert p.date_modified == datetime.datetime(
+        2019,
+        11,
+        27,
+        1,
+        30,
+        16,
+        681150,
+        tzinfo=datetime.timezone(datetime.timedelta(days=-1, seconds=72000)),
+    )
+
+
+def test_date_modified_none(photosdb):
+    """ Test date modified for a photo that hasn't been edited """
+
+    photos = photosdb.photos(uuid=[UUID_DICT["no_adjustments"]])
+    p = photos[0]
+    assert p.date_modified is None
+
+
 def test_uti(photosdb):
     for uuid, utis in UUID_UTI_DICT.items():
         photo = photosdb.get_photo(uuid)