815f07d6c1
Also: Allow override of database name and user in tests (important for me as I would have to mess with my PSQL and MySQL database users otherwise) Use dict.items instead of six.iteritems as it sporadically caused RuntimeError: dictionary changed size during iteration in Python 2.6 tests. Fix typo DNS to DSN Adds Python 3.5 to tox.ini Added an .editorconfig Import babel.dates in sqlalchemy_utils.i18n as an exception would be raised when using the latest versions of babel.
159 lines
4.1 KiB
Python
159 lines
4.1 KiB
Python
import pytest
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import sqlalchemy as sa
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from sqlalchemy_utils.observer import observes
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@pytest.fixture
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def Catalog(Base):
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catalog_category = sa.Table(
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'catalog_category',
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Base.metadata,
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sa.Column('catalog_id', sa.Integer, sa.ForeignKey('catalog.id')),
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sa.Column('category_id', sa.Integer, sa.ForeignKey('category.id'))
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)
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class Catalog(Base):
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__tablename__ = 'catalog'
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id = sa.Column(sa.Integer, primary_key=True)
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product_count = sa.Column(sa.Integer, default=0)
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@observes('categories.sub_categories.products')
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def product_observer(self, products):
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self.product_count = len(products)
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categories = sa.orm.relationship(
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'Category',
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backref='catalogs',
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secondary=catalog_category
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)
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return Catalog
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@pytest.fixture
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def Category(Base):
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category_subcategory = sa.Table(
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'category_subcategory',
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Base.metadata,
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sa.Column(
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'category_id',
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sa.Integer,
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sa.ForeignKey('category.id')
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),
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sa.Column(
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'subcategory_id',
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sa.Integer,
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sa.ForeignKey('sub_category.id')
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)
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)
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class Category(Base):
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__tablename__ = 'category'
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id = sa.Column(sa.Integer, primary_key=True)
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sub_categories = sa.orm.relationship(
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'SubCategory',
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backref='categories',
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secondary=category_subcategory
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)
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return Category
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@pytest.fixture
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def SubCategory(Base):
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subcategory_product = sa.Table(
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'subcategory_product',
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Base.metadata,
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sa.Column(
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'subcategory_id',
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sa.Integer,
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sa.ForeignKey('sub_category.id')
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),
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sa.Column(
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'product_id',
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sa.Integer,
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sa.ForeignKey('product.id')
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)
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)
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class SubCategory(Base):
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__tablename__ = 'sub_category'
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id = sa.Column(sa.Integer, primary_key=True)
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products = sa.orm.relationship(
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'Product',
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backref='sub_categories',
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secondary=subcategory_product
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)
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return SubCategory
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@pytest.fixture
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def Product(Base):
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class Product(Base):
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__tablename__ = 'product'
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id = sa.Column(sa.Integer, primary_key=True)
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price = sa.Column(sa.Numeric)
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return Product
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@pytest.fixture
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def init_models(Catalog, Category, SubCategory, Product):
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pass
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@pytest.fixture
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def catalog(session, Catalog, Category, SubCategory, Product):
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sub_category = SubCategory(products=[Product()])
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category = Category(sub_categories=[sub_category])
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catalog = Catalog(categories=[category])
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session.add(catalog)
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session.flush()
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return catalog
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@pytest.mark.usefixtures('postgresql_dsn')
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class TestObservesForManyToManyToManyToMany(object):
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def test_simple_insert(self, catalog):
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assert catalog.product_count == 1
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def test_add_leaf_object(self, catalog, session, Product):
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product = Product()
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catalog.categories[0].sub_categories[0].products.append(product)
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session.flush()
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assert catalog.product_count == 2
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def test_remove_leaf_object(self, catalog, session, Product):
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product = Product()
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catalog.categories[0].sub_categories[0].products.append(product)
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session.flush()
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session.delete(product)
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session.flush()
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assert catalog.product_count == 1
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def test_delete_intermediate_object(self, catalog, session):
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session.delete(catalog.categories[0].sub_categories[0])
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session.commit()
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assert catalog.product_count == 0
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def test_gathered_objects_are_distinct(
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self,
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session,
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Catalog,
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Category,
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SubCategory,
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Product
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):
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catalog = Catalog()
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category = Category(catalogs=[catalog])
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product = Product()
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category.sub_categories.append(
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SubCategory(products=[product])
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)
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session.add(
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SubCategory(categories=[category], products=[product])
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)
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session.commit()
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assert catalog.product_count == 1
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