def test_merge_file(historian: mincepy.Historian):
"""Test that merging files works correctly"""
file = historian.create_file('test.dat')
file.write_text('bla bla')
file.save()
with testing.temporary_historian(
testing.create_archive_uri(db_name='test_historian')) as remote:
local = historian
# Merge the file into the remote
result = remote.merge(local.find(obj_id=file.obj_id))
assert len(result.all) == len(result.merged) == local.find().count()
assert local.find().count() == remote.find().count()
remote_file = remote.get(file.obj_id)
assert file.read_text() == remote_file.read_text()
# Now check that files contained within objects are correctly merged
file_list = mincepy.List((file, ))
file_list.save() # pylint: disable=no-member
result = remote.merge(local.find(obj_id=file_list.obj_id)) # pylint: disable=no-member
assert len(result.merged) == 1
assert historian.get_snapshot_id(file_list) in result.merged
remote_file_list = remote.get(file_list.obj_id) # pylint: disable=no-member
assert file.read_text() == remote_file_list[0].read_text()
def test_large_merge(
historian: mincepy.Historian,
large_dataset, # pylint: disable=unused-argument
):
with testing.temporary_historian(
testing.create_archive_uri(db_name='test_historian')) as remote:
local = historian
all_objects = local.find()
assert all_objects.count() > 0
# Merge the large dataset into the remote historian
result = remote.merge(all_objects)
assert len(result.all) == len(result.merged) == local.find().count()
assert local.find().count() == remote.find().count()
def test_merge(historian: mincepy.Historian):
with testing.temporary_historian(
testing.create_archive_uri(db_name='test_historian')) as remote:
local = historian
# remote = clean_test_historian
remote_skoda = testing.Car(make='skoda', colour='green')
skoda_id = remote.save(remote_skoda)
assert remote_skoda._historian is remote
result = local.merge(remote.objects.find(obj_id=skoda_id))
assert remote.get_snapshot_id(remote_skoda) in result.merged
assert local.find(obj_id=skoda_id).count() == 1
# Now, let's update and see if we can merge
remote_skoda.colour = 'yellow'
remote.save(remote_skoda)
result = local.merge(remote.objects.find(obj_id=skoda_id))
assert remote.get_snapshot_id(remote_skoda) in result.merged
assert local.snapshots.find(obj_id=skoda_id).count() == 2
assert local.find(obj_id=skoda_id).one().colour == 'yellow'
# Now, change both to the same thing
local_skoda = local.load(skoda_id)
assert local_skoda._historian is local
assert local_skoda is not remote_skoda
local_skoda.colour = 'blue'
local_skoda.save()
remote_skoda.colour = 'blue'
remote_skoda.save()
result = local.merge(remote.objects.find(obj_id=skoda_id))
assert not result.merged # None should have been transferred
# Now check that conflicts are correctly handled
remote_skoda.colour = 'brown'
remote_skoda.save()
local_skoda.colour = 'grey'
local_skoda.save()
with pytest.raises(mincepy.MergeError):
local.merge(remote.objects.find(obj_id=skoda_id))