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from sqlalchemy import *
from sqlalchemy.testing import fixtures, AssertsExecutionResults
from sqlalchemy import testing
class FoundRowsTest(fixtures.TestBase, AssertsExecutionResults):
"""tests rowcount functionality"""
__requires__ = ('sane_rowcount', )
__backend__ = True
@classmethod
def setup_class(cls):
global employees_table, metadata
metadata = MetaData(testing.db)
employees_table = Table(
'employees', metadata, Column(
'employee_id', Integer, Sequence(
'employee_id_seq', optional=True), primary_key=True), Column(
'name', String(50)), Column(
'department', String(1)), )
metadata.create_all()
def setup(self):
global data
data = [('Angela', 'A'),
('Andrew', 'A'),
('Anand', 'A'),
('Bob', 'B'),
('Bobette', 'B'),
('Buffy', 'B'),
('Charlie', 'C'),
('Cynthia', 'C'),
('Chris', 'C')]
i = employees_table.insert()
i.execute(*[{'name': n, 'department': d} for n, d in data])
def teardown(self):
employees_table.delete().execute()
@classmethod
def teardown_class(cls):
metadata.drop_all()
def test_basic(self):
s = employees_table.select()
r = s.execute().fetchall()
assert len(r) == len(data)
def test_update_rowcount1(self):
# WHERE matches 3, 3 rows changed
department = employees_table.c.department
r = employees_table.update(department == 'C').execute(department='Z')
print("expecting 3, dialect reports %s" % r.rowcount)
assert r.rowcount == 3
def test_update_rowcount2(self):
# WHERE matches 3, 0 rows changed
department = employees_table.c.department
r = employees_table.update(department == 'C').execute(department='C')
print("expecting 3, dialect reports %s" % r.rowcount)
assert r.rowcount == 3
def test_delete_rowcount(self):
# WHERE matches 3, 3 rows deleted
department = employees_table.c.department
r = employees_table.delete(department == 'C').execute()
print("expecting 3, dialect reports %s" % r.rowcount)
assert r.rowcount == 3
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