1import pytest
2import sqlalchemy as sa
3
4from sqlalchemy_utils import get_columns
5
6
7@pytest.fixture
8def Building(Base):
9    class Building(Base):
10        __tablename__ = 'building'
11        id = sa.Column('_id', sa.Integer, primary_key=True)
12        name = sa.Column('_name', sa.Unicode(255))
13    return Building
14
15
16@pytest.fixture
17def columns():
18    return ['_id', '_name']
19
20
21class TestGetColumns(object):
22    def test_table(self, Building):
23        assert isinstance(
24            get_columns(Building.__table__),
25            sa.sql.base.ImmutableColumnCollection
26        )
27
28    def test_instrumented_attribute(self, Building):
29        assert get_columns(Building.id) == [Building.__table__.c._id]
30
31    def test_column_property(self, Building):
32        assert get_columns(Building.id.property) == [
33            Building.__table__.c._id
34        ]
35
36    def test_column(self, Building):
37        assert get_columns(Building.__table__.c._id) == [
38            Building.__table__.c._id
39        ]
40
41    def test_declarative_class(self, Building, columns):
42        assert [c.name for c in get_columns(Building).values()] == columns
43
44    def test_declarative_object(self, Building, columns):
45        assert [c.name for c in get_columns(Building()).values()] == columns
46
47    def test_mapper(self, Building, columns):
48        assert [
49            c.name for c in get_columns(Building.__mapper__).values()
50        ] == columns
51
52    def test_class_alias(self, Building, columns):
53        assert [
54            c.name for c in get_columns(sa.orm.aliased(Building)).values()
55        ] == columns
56
57    def test_table_alias(self, Building, columns):
58        alias = sa.orm.aliased(Building.__table__)
59        assert [c.name for c in get_columns(alias).values()] == columns
60