def query(self):
"""
Build an Elasticsearch query string.
Returns:
str|None: "[title] [author]", or None if invalid.
"""
t = sanitize_query(self.marc.title())
a = sanitize_query(self.marc.author())
return t+' '+a
def test_remove_numbers():
assert sanitize_query('Keats, John, 1795-1821') == 'keats john'
def test_remove_punctuation():
assert sanitize_query('Antonio (Flaminio),') == 'antonio flaminio'
