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from sqlalchemy.testing import fixtures, is_true, is_false
from sqlalchemy import MetaData, Table, Column, Integer, String
from sqlalchemy import and_, or_, bindparam
from sqlalchemy.sql.elements import ClauseList
from sqlalchemy.sql import operators
class CompareClausesTest(fixtures.TestBase):
def setup(self):
m = MetaData()
self.a = Table(
'a', m,
Column('x', Integer),
Column('y', Integer)
)
self.b = Table(
'b', m,
Column('y', Integer),
Column('z', Integer)
)
def test_compare_clauselist_associative(self):
l1 = and_(
self.a.c.x == self.b.c.y,
self.a.c.y == self.b.c.z
)
l2 = and_(
self.a.c.y == self.b.c.z,
self.a.c.x == self.b.c.y,
)
l3 = and_(
self.a.c.x == self.b.c.z,
self.a.c.y == self.b.c.y
)
is_true(l1.compare(l1))
is_true(l1.compare(l2))
is_false(l1.compare(l3))
def test_compare_clauselist_not_associative(self):
l1 = ClauseList(
self.a.c.x, self.a.c.y, self.b.c.y, operator=operators.sub)
l2 = ClauseList(
self.b.c.y, self.a.c.x, self.a.c.y, operator=operators.sub)
is_true(l1.compare(l1))
is_false(l1.compare(l2))
def test_compare_clauselist_assoc_different_operator(self):
l1 = and_(
self.a.c.x == self.b.c.y,
self.a.c.y == self.b.c.z
)
l2 = or_(
self.a.c.y == self.b.c.z,
self.a.c.x == self.b.c.y,
)
is_false(l1.compare(l2))
def test_compare_clauselist_not_assoc_different_operator(self):
l1 = ClauseList(
self.a.c.x, self.a.c.y, self.b.c.y, operator=operators.sub)
l2 = ClauseList(
self.a.c.x, self.a.c.y, self.b.c.y, operator=operators.div)
is_false(l1.compare(l2))
def test_compare_binds(self):
b1 = bindparam("foo", type_=Integer())
b2 = bindparam("foo", type_=Integer())
b3 = bindparam("bar", type_=Integer())
b4 = bindparam("foo", type_=String())
def c1(): return 5
def c2(): return 6
b5 = bindparam("foo", type_=Integer(), callable_=c1)
b6 = bindparam("foo", type_=Integer(), callable_=c2)
b7 = bindparam("foo", type_=Integer(), callable_=c1)
b8 = bindparam("foo", type_=Integer, value=5)
b9 = bindparam("foo", type_=Integer, value=6)
is_false(b1.compare(b5))
is_true(b5.compare(b7))
is_false(b5.compare(b6))
is_true(b1.compare(b2))
# currently not comparing "key", as we often have to compare
# anonymous names. however we should really check for that
is_true(b1.compare(b3))
is_false(b1.compare(b4))
is_false(b1.compare(b8))
is_false(b8.compare(b9))
is_true(b8.compare(b8))
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