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# Copyright 2010 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""Tests for `Collection`."""
__metaclass__ = type
from storm.locals import (
Int,
Storm,
)
from zope.component import getUtility
from lp.services.database.collection import Collection
from lp.services.webapp.interfaces import (
IStoreSelector,
MAIN_STORE,
MASTER_FLAVOR,
)
from lp.testing import TestCaseWithFactory
from lp.testing.fakemethod import FakeMethod
from lp.testing.layers import ZopelessDatabaseLayer
def get_store():
return getUtility(IStoreSelector).get(MAIN_STORE, MASTER_FLAVOR)
class FakeStore:
find = FakeMethod(result=[])
def using(self, *args):
return self
def make_table(range_start, range_end, table_name=None):
"""Create a temporary table and a storm class for it."""
assert range_start < range_end, "Invalid range."
if table_name is None:
table_name = "TestTable"
get_store().execute("""
CREATE TEMP TABLE %s AS
SELECT generate_series AS id
FROM generate_series(%d, %d)
""" % (table_name, range_start, range_end - 1))
class TestTable(Storm):
"""A test class/table generated on the fly for testing purposes."""
__storm_table__ = table_name
id = Int(primary=True)
def __init__(self, id):
self.id = id
def __eq__(self, other):
return self.id == other.id
return TestTable
def get_ids(testtable_objects):
"""Helper to unpack ids from a sequence of TestTable objects."""
return [obj.id for obj in testtable_objects]
class CollectionTest(TestCaseWithFactory):
layer = ZopelessDatabaseLayer
def test_make_table(self):
TestTable = make_table(1, 5)
result = get_store().find(TestTable).order_by(TestTable.id)
self.assertEqual(range(1, 5), get_ids(result))
def test_select_one(self):
TestTable = make_table(1, 5)
collection = Collection(TestTable.id == 1, tables=TestTable)
result = collection.select(TestTable)
self.assertEqual([1], get_ids(result))
def test_select_all(self):
TestTable = make_table(1, 3)
collection = Collection(tables=TestTable)
result = collection.select(TestTable)
self.assertContentEqual([1, 2], get_ids(result))
def test_select_condition(self):
TestTable = make_table(1, 5)
collection = Collection(TestTable.id > 2, tables=TestTable)
result = collection.select(TestTable)
self.assertContentEqual([3, 4], get_ids(result))
def test_select_conditions(self):
TestTable = make_table(1, 5)
collection = Collection(
TestTable.id > 2, TestTable.id < 4, tables=TestTable)
result = collection.select(TestTable)
self.assertContentEqual([3], get_ids(result))
def test_select_column(self):
TestTable = make_table(1, 3)
collection = Collection(tables=TestTable)
result = collection.select(TestTable.id)
self.assertContentEqual([1, 2], list(result))
def test_copy_collection(self):
TestTable = make_table(1, 3)
collection = Collection(tables=TestTable)
copied_collection = Collection(collection)
result = copied_collection.select(TestTable)
self.assertContentEqual([1, 2], get_ids(result))
def test_restrict_collection(self):
TestTable = make_table(1, 3)
collection = Collection(tables=TestTable)
copied_collection = Collection(collection, TestTable.id < 2)
result = copied_collection.select(TestTable)
self.assertContentEqual([1], get_ids(result))
def test_add_tables(self):
# The list of tables to select from carries across copies.
TestTable1 = make_table(1, 2, 'TestTable1')
TestTable2 = make_table(2, 3, 'TestTable2')
collection = Collection(tables=TestTable1)
collection = Collection(collection, tables=TestTable2)
result = collection.select(TestTable1.id, TestTable2.id)
self.assertEqual([(1, 2)], list(result))
def test_add_tables_and_conditions(self):
TestTable1 = make_table(1, 2, 'TestTable1')
TestTable2 = make_table(2, 3, 'TestTable2')
collection = Collection(TestTable1.id == 1, tables=TestTable1)
collection = Collection(
collection, TestTable2.id == 2, tables=TestTable2)
result = collection.select(TestTable1.id, TestTable2.id)
self.assertEqual([(1, 2)], list(result))
def test_select_join(self):
TestTable1 = make_table(1, 2, 'TestTable1')
TestTable2 = make_table(2, 3, 'TestTable2')
collection = Collection(tables=(TestTable1, TestTable2))
result = collection.select(TestTable1, TestTable2)
self.assertEqual(
[(TestTable1(id=1), TestTable2(id=2))], list(result))
def test_select_join_column(self):
TestTable1 = make_table(1, 2, 'TestTable1')
TestTable2 = make_table(2, 3, 'TestTable2')
collection = Collection(tables=(TestTable1, TestTable2))
result = collection.select(TestTable1.id, TestTable2.id)
self.assertEqual([(1, 2)], list(result))
def test_select_partial_join(self):
TestTable1 = make_table(1, 2, 'TestTable1')
TestTable2 = make_table(2, 3, 'TestTable2')
collection = Collection(
TestTable2.id == TestTable1.id + 1,
tables=(TestTable1, TestTable2))
result = collection.select(TestTable1.id)
self.assertEqual([1], list(result))
def test_joinInner(self):
TestTable1 = make_table(1, 3, 'TestTable1')
TestTable2 = make_table(2, 4, 'TestTable2')
# Add a join table to the collection.
collection = Collection(tables=TestTable1).joinInner(
TestTable2, TestTable2.id == TestTable1.id)
result = collection.select(TestTable1.id, TestTable2.id)
self.assertContentEqual([(2, 2)], list(result))
def test_joinOuter(self):
TestTable1 = make_table(1, 3, 'TestTable1')
TestTable2 = make_table(2, 4, 'TestTable2')
# Add an outer-join table to the collection.
collection = Collection(tables=TestTable1).joinOuter(
TestTable2, TestTable2.id == TestTable1.id)
result = collection.select(TestTable1.id, TestTable2.id)
self.assertContentEqual([(1, None), (2, 2)], list(result))
def test_select_store(self):
TestTable = make_table(1, 2)
collection = Collection(tables=TestTable)
store = FakeStore()
self.assertNotEqual(store, collection.store)
collection_with_store = collection.use(store)
self.assertEqual(store, collection_with_store.store)
self.assertEqual([], collection_with_store.select(TestTable))
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