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from test.lib import fixtures, testing
from test.lib.testing import assert_raises_message
from sqlalchemy.sql import column, desc, asc, literal, collate
from sqlalchemy.sql.expression import BinaryExpression, \
ClauseList, Grouping, _DefaultColumnComparator,\
UnaryExpression
from sqlalchemy.sql import operators
from sqlalchemy import exc
from sqlalchemy.schema import Column, Table, MetaData
from sqlalchemy.types import Integer, TypeEngine, TypeDecorator
class DefaultColumnComparatorTest(fixtures.TestBase):
def _do_scalar_test(self, operator, compare_to):
left = column('left')
assert left.comparator.operate(operator).compare(
compare_to(left)
)
def _do_operate_test(self, operator):
left = column('left')
right = column('right')
assert left.comparator.operate(operator, right).compare(
BinaryExpression(left, right, operator)
)
def test_desc(self):
self._do_scalar_test(operators.desc_op, desc)
def test_asc(self):
self._do_scalar_test(operators.asc_op, asc)
def test_plus(self):
self._do_operate_test(operators.add)
def test_no_getitem(self):
assert_raises_message(
NotImplementedError,
"Operator 'getitem' is not supported on this expression",
self._do_operate_test, operators.getitem
)
assert_raises_message(
NotImplementedError,
"Operator 'getitem' is not supported on this expression",
lambda: column('left')[3]
)
def test_in(self):
left = column('left')
assert left.comparator.operate(operators.in_op, [1, 2, 3]).compare(
BinaryExpression(
left,
Grouping(ClauseList(
literal(1), literal(2), literal(3)
)),
operators.in_op
)
)
def test_collate(self):
left = column('left')
right = "some collation"
left.comparator.operate(operators.collate, right).compare(
collate(left, right)
)
def test_concat(self):
self._do_operate_test(operators.concat_op)
class CustomUnaryOperatorTest(fixtures.TestBase, testing.AssertsCompiledSQL):
__dialect__ = 'default'
def _factorial_fixture(self):
class MyInteger(Integer):
class comparator_factory(Integer.Comparator):
def factorial(self):
return UnaryExpression(self.expr,
modifier=operators.custom_op("!"),
type_=MyInteger)
def factorial_prefix(self):
return UnaryExpression(self.expr,
operator=operators.custom_op("!!"),
type_=MyInteger)
return MyInteger
def test_factorial(self):
col = column('somecol', self._factorial_fixture())
self.assert_compile(
col.factorial(),
"somecol !"
)
def test_double_factorial(self):
col = column('somecol', self._factorial_fixture())
self.assert_compile(
col.factorial().factorial(),
"somecol ! !"
)
def test_factorial_prefix(self):
col = column('somecol', self._factorial_fixture())
self.assert_compile(
col.factorial_prefix(),
"!! somecol"
)
def test_unary_no_ops(self):
assert_raises_message(
exc.CompileError,
"Unary expression has no operator or modifier",
UnaryExpression(literal("x")).compile
)
def test_unary_both_ops(self):
assert_raises_message(
exc.CompileError,
"Unary expression does not support operator and "
"modifier simultaneously",
UnaryExpression(literal("x"),
operator=operators.custom_op("x"),
modifier=operators.custom_op("y")).compile
)
class _CustomComparatorTests(object):
def test_override_builtin(self):
c1 = Column('foo', self._add_override_factory())
self._assert_add_override(c1)
def test_column_proxy(self):
t = Table('t', MetaData(),
Column('foo', self._add_override_factory())
)
proxied = t.select().c.foo
self._assert_add_override(proxied)
def test_alias_proxy(self):
t = Table('t', MetaData(),
Column('foo', self._add_override_factory())
)
proxied = t.alias().c.foo
self._assert_add_override(proxied)
def test_binary_propagate(self):
c1 = Column('foo', self._add_override_factory())
self._assert_add_override(c1 - 6)
def test_reverse_binary_propagate(self):
c1 = Column('foo', self._add_override_factory())
self._assert_add_override(6 - c1)
def test_binary_multi_propagate(self):
c1 = Column('foo', self._add_override_factory())
self._assert_add_override((c1 - 6) + 5)
def test_no_boolean_propagate(self):
c1 = Column('foo', self._add_override_factory())
self._assert_not_add_override(c1 == 56)
def _assert_add_override(self, expr):
assert (expr + 5).compare(
expr.op("goofy")(5)
)
def _assert_not_add_override(self, expr):
assert not (expr + 5).compare(
expr.op("goofy")(5)
)
class CustomComparatorTest(_CustomComparatorTests, fixtures.TestBase):
def _add_override_factory(self):
class MyInteger(Integer):
class comparator_factory(TypeEngine.Comparator):
def __init__(self, expr):
self.expr = expr
def __add__(self, other):
return self.expr.op("goofy")(other)
return MyInteger
class TypeDecoratorComparatorTest(_CustomComparatorTests, fixtures.TestBase):
def _add_override_factory(self):
class MyInteger(TypeDecorator):
impl = Integer
class comparator_factory(TypeEngine.Comparator):
def __init__(self, expr):
self.expr = expr
def __add__(self, other):
return self.expr.op("goofy")(other)
return MyInteger
class CustomEmbeddedinTypeDecoratorTest(_CustomComparatorTests, fixtures.TestBase):
def _add_override_factory(self):
class MyInteger(Integer):
class comparator_factory(TypeEngine.Comparator):
def __init__(self, expr):
self.expr = expr
def __add__(self, other):
return self.expr.op("goofy")(other)
class MyDecInteger(TypeDecorator):
impl = MyInteger
return MyDecInteger
class NewOperatorTest(_CustomComparatorTests, fixtures.TestBase):
def _add_override_factory(self):
class MyInteger(Integer):
class comparator_factory(TypeEngine.Comparator):
def __init__(self, expr):
self.expr = expr
def foob(self, other):
return self.expr.op("foob")(other)
return MyInteger
def _assert_add_override(self, expr):
assert (expr.foob(5)).compare(
expr.op("foob")(5)
)
def _assert_not_add_override(self, expr):
assert not hasattr(expr, "foob")
from sqlalchemy import and_, not_, between
class OperatorPrecedenceTest(fixtures.TestBase, testing.AssertsCompiledSQL):
__dialect__ = 'default'
def test_operator_precedence(self):
# TODO: clean up /break up
metadata = MetaData()
table = Table('op', metadata,
Column('field', Integer))
self.assert_compile(table.select((table.c.field == 5) == None),
"SELECT op.field FROM op WHERE (op.field = :field_1) IS NULL")
self.assert_compile(table.select((table.c.field + 5) == table.c.field),
"SELECT op.field FROM op WHERE op.field + :field_1 = op.field")
self.assert_compile(table.select((table.c.field + 5) * 6),
"SELECT op.field FROM op WHERE (op.field + :field_1) * :param_1")
self.assert_compile(table.select((table.c.field * 5) + 6),
"SELECT op.field FROM op WHERE op.field * :field_1 + :param_1")
self.assert_compile(table.select(5 + table.c.field.in_([5, 6])),
"SELECT op.field FROM op WHERE :param_1 + "
"(op.field IN (:field_1, :field_2))")
self.assert_compile(table.select((5 + table.c.field).in_([5, 6])),
"SELECT op.field FROM op WHERE :field_1 + op.field "
"IN (:param_1, :param_2)")
self.assert_compile(table.select(not_(and_(table.c.field == 5,
table.c.field == 7))),
"SELECT op.field FROM op WHERE NOT "
"(op.field = :field_1 AND op.field = :field_2)")
self.assert_compile(table.select(not_(table.c.field == 5)),
"SELECT op.field FROM op WHERE op.field != :field_1")
self.assert_compile(table.select(not_(table.c.field.between(5, 6))),
"SELECT op.field FROM op WHERE NOT "
"(op.field BETWEEN :field_1 AND :field_2)")
self.assert_compile(table.select(not_(table.c.field) == 5),
"SELECT op.field FROM op WHERE (NOT op.field) = :param_1")
self.assert_compile(table.select((table.c.field == table.c.field).\
between(False, True)),
"SELECT op.field FROM op WHERE (op.field = op.field) "
"BETWEEN :param_1 AND :param_2")
self.assert_compile(table.select(
between((table.c.field == table.c.field), False, True)),
"SELECT op.field FROM op WHERE (op.field = op.field) "
"BETWEEN :param_1 AND :param_2")
class OperatorAssociativityTest(fixtures.TestBase, testing.AssertsCompiledSQL):
__dialect__ = 'default'
def test_associativity(self):
# TODO: clean up /break up
f = column('f')
self.assert_compile(f - f, "f - f")
self.assert_compile(f - f - f, "(f - f) - f")
self.assert_compile((f - f) - f, "(f - f) - f")
self.assert_compile((f - f).label('foo') - f, "(f - f) - f")
self.assert_compile(f - (f - f), "f - (f - f)")
self.assert_compile(f - (f - f).label('foo'), "f - (f - f)")
# because - less precedent than /
self.assert_compile(f / (f - f), "f / (f - f)")
self.assert_compile(f / (f - f).label('foo'), "f / (f - f)")
self.assert_compile(f / f - f, "f / f - f")
self.assert_compile((f / f) - f, "f / f - f")
self.assert_compile((f / f).label('foo') - f, "f / f - f")
# because / more precedent than -
self.assert_compile(f - (f / f), "f - f / f")
self.assert_compile(f - (f / f).label('foo'), "f - f / f")
self.assert_compile(f - f / f, "f - f / f")
self.assert_compile((f - f) / f, "(f - f) / f")
self.assert_compile(((f - f) / f) - f, "(f - f) / f - f")
self.assert_compile((f - f) / (f - f), "(f - f) / (f - f)")
# higher precedence
self.assert_compile((f / f) - (f / f), "f / f - f / f")
self.assert_compile((f / f) - (f - f), "f / f - (f - f)")
self.assert_compile((f / f) / (f - f), "(f / f) / (f - f)")
self.assert_compile(f / (f / (f - f)), "f / (f / (f - f))")
|
