def test_get_select_expressions_none_fields():
fields = None
result = get_select_expressions(fields, FIELD_EXPRESSION_DICT)
assert result.count(',') == 2
assert 'map.uid AS `id`' in result
assert 'UNIX_TIMESTAMP(t.date) AS `timestamp`' in result
assert 'feature.likes AS `likes`' in result
def test_get_select_expressions():
fields = ['id', 'timestamp']
result = get_select_expressions(fields, FIELD_EXPRESSION_DICT)
assert result == 'map.uid AS `id`, UNIX_TIMESTAMP(t.date) AS `timestamp`'