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import pytest
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import ARRAY
from sqlalchemy_utils import (
assert_max_length,
assert_max_value,
assert_min_value,
assert_non_nullable,
assert_nullable
)
@pytest.fixture()
def User(Base):
class User(Base):
__tablename__ = 'user'
id = sa.Column('_id', sa.Integer, primary_key=True)
name = sa.Column('_name', sa.String(20))
age = sa.Column('_age', sa.Integer, nullable=False)
email = sa.Column(
'_email', sa.String(200), nullable=False, unique=True
)
fav_numbers = sa.Column('_fav_numbers', ARRAY(sa.Integer))
__table_args__ = (
sa.CheckConstraint(sa.and_(age >= 0, age <= 150)),
sa.CheckConstraint(
sa.and_(
sa.func.array_length(fav_numbers, 1) <= 8
)
)
)
return User
@pytest.fixture()
def user(User, session):
user = User(
name='Someone',
email='someone@example.com',
age=15,
fav_numbers=[1, 2, 3]
)
session.add(user)
session.commit()
return user
@pytest.mark.usefixtures('postgresql_dsn')
class TestAssertMaxLengthWithArray:
def test_with_max_length(self, user):
assert_max_length(user, 'fav_numbers', 8)
assert_max_length(user, 'fav_numbers', 8)
def test_smaller_than_max_length(self, user):
with pytest.raises(AssertionError):
assert_max_length(user, 'fav_numbers', 7)
with pytest.raises(AssertionError):
assert_max_length(user, 'fav_numbers', 7)
def test_bigger_than_max_length(self, user):
with pytest.raises(AssertionError):
assert_max_length(user, 'fav_numbers', 9)
with pytest.raises(AssertionError):
assert_max_length(user, 'fav_numbers', 9)
@pytest.mark.usefixtures('postgresql_dsn')
class TestAssertNonNullable:
def test_non_nullable_column(self, user):
# Test everything twice so that session gets rolled back properly
assert_non_nullable(user, 'age')
assert_non_nullable(user, 'age')
def test_nullable_column(self, user):
with pytest.raises(AssertionError):
assert_non_nullable(user, 'name')
with pytest.raises(AssertionError):
assert_non_nullable(user, 'name')
@pytest.mark.usefixtures('postgresql_dsn')
class TestAssertNullable:
def test_nullable_column(self, user):
assert_nullable(user, 'name')
assert_nullable(user, 'name')
def test_non_nullable_column(self, user):
with pytest.raises(AssertionError):
assert_nullable(user, 'age')
with pytest.raises(AssertionError):
assert_nullable(user, 'age')
@pytest.mark.usefixtures('postgresql_dsn')
class TestAssertMaxLength:
def test_with_max_length(self, user):
assert_max_length(user, 'name', 20)
assert_max_length(user, 'name', 20)
def test_with_non_nullable_column(self, user):
assert_max_length(user, 'email', 200)
assert_max_length(user, 'email', 200)
def test_smaller_than_max_length(self, user):
with pytest.raises(AssertionError):
assert_max_length(user, 'name', 19)
with pytest.raises(AssertionError):
assert_max_length(user, 'name', 19)
def test_bigger_than_max_length(self, user):
with pytest.raises(AssertionError):
assert_max_length(user, 'name', 21)
with pytest.raises(AssertionError):
assert_max_length(user, 'name', 21)
@pytest.mark.usefixtures('postgresql_dsn')
class TestAssertMinValue:
def test_with_min_value(self, user):
assert_min_value(user, 'age', 0)
assert_min_value(user, 'age', 0)
def test_smaller_than_min_value(self, user):
with pytest.raises(AssertionError):
assert_min_value(user, 'age', -1)
with pytest.raises(AssertionError):
assert_min_value(user, 'age', -1)
def test_bigger_than_min_value(self, user):
with pytest.raises(AssertionError):
assert_min_value(user, 'age', 1)
with pytest.raises(AssertionError):
assert_min_value(user, 'age', 1)
@pytest.mark.usefixtures('postgresql_dsn')
class TestAssertMaxValue:
def test_with_min_value(self, user):
assert_max_value(user, 'age', 150)
assert_max_value(user, 'age', 150)
def test_smaller_than_max_value(self, user):
with pytest.raises(AssertionError):
assert_max_value(user, 'age', 149)
with pytest.raises(AssertionError):
assert_max_value(user, 'age', 149)
def test_bigger_than_max_value(self, user):
with pytest.raises(AssertionError):
assert_max_value(user, 'age', 151)
with pytest.raises(AssertionError):
assert_max_value(user, 'age', 151)
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