def test_set_equivalence(self):
edition = self._edition()
edition.title = "The House on Mango Street"
edition.add_contributor(Contributor(viaf="112460612"),
Contributor.AUTHOR_ROLE)
identifier = edition.primary_identifier
i1 = self._identifier()
identifierdata1 = IdentifierData(type=i1.type,
identifier=i1.identifier)
good_metadata = Metadata(DataSource.lookup(self._db,
DataSource.GUTENBERG),
primary_identifier=identifierdata1,
title="The House on Mango Street",
contributors=[Contributor(viaf="112460612")])
i2 = self._identifier()
identifierdata2 = IdentifierData(type=i2.type,
identifier=i2.identifier)
bad_metadata = Metadata(DataSource.lookup(self._db,
DataSource.GUTENBERG),
primary_identifier=identifierdata2,
title="Calvin & Hobbes",
contributors=[Contributor(viaf="101010")])
self.provider.set_equivalence(identifier, good_metadata)
self.provider.set_equivalence(identifier, bad_metadata)
equivalencies = Equivalency.for_identifiers(self._db,
[identifier]).all()
# The identifier for the bad metadata isn't made equivalent
eq_([i1], [x.output for x in equivalencies])
eq_([1], [x.strength for x in equivalencies])
# But if the existing identifier has no editions, they're made equivalent.
identifier = self._identifier()
self.provider.set_equivalence(identifier, bad_metadata)
equivalencies = Equivalency.for_identifiers(self._db,
[identifier]).all()
eq_([i2], [x.output for x in equivalencies])
eq_([1], [x.strength for x in equivalencies])
