root/trunk/geniusql/test/test_genexp.py

import datetime
import unittest

import geniusql
from geniusql import Query


db = geniusql.db("sqlite", **{'name': ':memory:'})
db.create()
schema = db.schema()
schema.create()

Person = schema.table('Person')
Person['ID'] = schema.column(int, autoincrement=True, key=True)
Person['Name'] = schema.column(hints={'bytes': 100})
schema['Person'] = Person

Torture = schema.table('Torture')
Torture['ID'] = schema.column(int, autoincrement=True, key=True)
Torture['Name'] = schema.column(hints={'bytes': 100})
schema['Torture'] = Torture



amount = 5
relation = [schema['Person'], schema['Torture']]
a = [1,2,3,4,5]
f = [(([t1.a, t1.b + t2.a] for t1, t2 in relation if t1.a > 13),
      Query(relation, lambda t1, t2: [t1.a, t1.b + t2.a],
            lambda t1, t2: t1.a > 13)),
     (([x.Name] for x in schema['Person'] if x.Name in a),
      Query(schema['Person'], lambda x: [x.Name], lambda x: x.Name in a)),
##     (lambda x: x + datetime.date(2004, 1, 1), astwalk.AST(
##          Add((Name('x'), Const(datetime.date(2004, 1, 1)))),
##          ['x'])),
##     (lambda x, **kw: (x.Date == datetime.date(2004, 1, 1)
##                       and x.Qty < kw['Size']), astwalk.AST(
##          And((Compare(Getattr(Name('x'), 'Date'),
##                       [('==', Const(datetime.date(2004, 1, 1)))]),
##               Compare(Getattr(Name('x'), 'Qty'),
##                       [('<', Subscript(Name('kw'), 'OP_APPLY',
##                                        [Const('Size')]))]))),
##          ['x'], dstar_args='kw')),
##      # Mix names from globals, locals, attrs
##     (lambda x, amount: (4 != x.amount) or (amount * 3 > 20), astwalk.AST(
##          Or((Compare(Const(4), [('!=', Getattr(Name('x'), 'amount'))]),
##              Compare(Mul((Name('amount'), Const(3))), [('>', Const(20))]))),
##          ['x', 'amount'])),
##     (lambda x: 3 * 4 * 5 * x, astwalk.AST(
##          Mul((Const(60), Name('x'))),
##          ['x'])),
##     (lambda x: a[2:4] == -x['offset'], astwalk.AST(
##          Compare(Const([3, 4]),
##                  [('==', UnarySub(Subscript(Name('x'), 'OP_APPLY',
##                                             [Const('offset')])))]),
##          ['x'])),
##     (lambda x: amount == 5 or amount == x.Qty, astwalk.AST(
##          Or((Const(True),
##              Compare(Const(5), [('==', Getattr(Name('x'), 'Qty'))]))),
##          ['x'])),
##     (lambda x: not (x.a == 3 and (x.b > 1 or x.b < -10)), astwalk.AST(
##          Not(And((Compare(Getattr(Name('x'), 'a'),
##                           [('==', Const(3))]),
##                   Or((Compare(Getattr(Name('x'), 'b'),
##                               [('>', Const(1))]),
##                       Compare(Getattr(Name('x'), 'b'),
##                               [('<', Const(-10))])))))),
##          ['x'])),
##     # Unicode const
##     (lambda x: x.Name == u'Dimsdale', astwalk.AST(
##          Compare(Getattr(Name('x'), 'Name'), [('==', Const(u'Dimsdale'))]),
##          ['x'])),
##     # getattr
##     (lambda x: getattr(x, 'Name') == u'Dimsdale', astwalk.AST(
##          Compare(Getattr(Name('x'), 'Name'), [('==', Const(u'Dimsdale'))]),
##          ['x'])),
##     # multiple args
##     (lambda x, y, z, **kw: x.Qty > 1 and y.Qty > 20 and z.Type == 'A', astwalk.AST(
##          And((Compare(Getattr(Name('x'), 'Qty'),
##                       [('>', Const(1))]),
##               And((Compare(Getattr(Name('y'), 'Qty'),
##                            [('>', Const(20))]),
##                    Compare(Getattr(Name('z'), 'Type'),
##                            [('==', Const('A'))]))))),
##          ['x', 'y', 'z'], dstar_args='kw')),
     ]


class GenExpTests(unittest.TestCase):

    def test_GenExp(self):
        for genexp, expected in f:
            q = Query.from_genexp(genexp)
##            lp.verbose = True
            self.assertEqual(q.relation, expected.relation)
            self.assertEqual(q.attributes, expected.attributes)
            self.assertEqual(q.restriction, expected.restriction)


if __name__ == "__main__":
    unittest.main(__name__)