# coding: utf-8
from sqlalchemy.test.testing import eq_, assert_raises, assert_raises_message
import decimal
import datetime, os, re
from sqlalchemy import *
from sqlalchemy import exc, types, util, schema
from sqlalchemy.sql import operators, column, table
from sqlalchemy.test.testing import eq_
import sqlalchemy.engine.url as url
from sqlalchemy.databases import *
from sqlalchemy.test.schema import Table, Column
from sqlalchemy.test import *
from sqlalchemy.test.util import picklers
from decimal import Decimal
from sqlalchemy.test.util import round_decimal


class AdaptTest(TestBase):
    def test_uppercase_rendering(self):
        """Test that uppercase types from types.py always render as their
        type.

        As of SQLA 0.6, using an uppercase type means you want specifically
        that type. If the database in use doesn't support that DDL, it (the DB
        backend) should raise an error - it means you should be using a
        lowercased (genericized) type.

        """

        for dialect in [
                oracle.dialect(), 
                mysql.dialect(), 
                postgresql.dialect(), 
                sqlite.dialect(), 
                mssql.dialect()]: 
            for type_, expected in (
                (FLOAT, "FLOAT"),
                (NUMERIC, "NUMERIC"),
                (DECIMAL, "DECIMAL"),
                (INTEGER, "INTEGER"),
                (SMALLINT, "SMALLINT"),
                (TIMESTAMP, ("TIMESTAMP", "TIMESTAMP WITHOUT TIME ZONE")),
                (DATETIME, "DATETIME"),
                (DATE, "DATE"),
                (TIME, ("TIME", "TIME WITHOUT TIME ZONE")),
                (CLOB, "CLOB"),
                (VARCHAR(10), ("VARCHAR(10)","VARCHAR(10 CHAR)")),
                (NVARCHAR(10), ("NVARCHAR(10)", "NATIONAL VARCHAR(10)",
                                    "NVARCHAR2(10)")),
                (CHAR, "CHAR"),
                (NCHAR, ("NCHAR", "NATIONAL CHAR")),
                (BLOB, "BLOB"),
                (BOOLEAN, ("BOOLEAN", "BOOL"))
            ):
                if isinstance(expected, str):
                    expected = (expected, )

                compiled = types.to_instance(type_).\
                            compile(dialect=dialect)

                assert compiled in expected, \
                    "%r matches none of %r for dialect %s" % \
                    (compiled, expected, dialect.name)

                assert str(types.to_instance(type_)) in expected, \
                    "default str() of type %r not expected, %r" % \
                    (type_, expected)

class TypeAffinityTest(TestBase):
    def test_type_affinity(self):
        for type_, affin in [
            (String(), String),
            (VARCHAR(), String),
            (Date(), Date),
            (LargeBinary(), types._Binary)
        ]:
            eq_(type_._type_affinity, affin)

        for t1, t2, comp in [
            (Integer(), SmallInteger(), True),
            (Integer(), String(), False),
            (Integer(), Integer(), True),
            (Text(), String(), True),
            (Text(), Unicode(), True),
            (LargeBinary(), Integer(), False),
            (LargeBinary(), PickleType(), True),
            (PickleType(), LargeBinary(), True),
            (PickleType(), PickleType(), True),
        ]:
            eq_(t1._compare_type_affinity(t2), comp, "%s %s" % (t1, t2))

class PickleMetadataTest(TestBase):
    def testmeta(self):
        for loads, dumps in picklers():
            column_types = [
                Column('Boo', Boolean()),
                Column('Str', String()),
                Column('Tex', Text()),
                Column('Uni', Unicode()),
                Column('Int', Integer()),
                Column('Sma', SmallInteger()),
                Column('Big', BigInteger()),
                Column('Num', Numeric()),
                Column('Flo', Float()),
                Column('Dat', DateTime()),
                Column('Dat', Date()),
                Column('Tim', Time()),
                Column('Lar', LargeBinary()),
                Column('Pic', PickleType()),
                Column('Int', Interval()),
                Column('Enu', Enum('x','y','z', name="somename")),
            ]
            for column_type in column_types:
                #print column_type
                meta = MetaData()
                Table('foo', meta, column_type)
                ct = loads(dumps(column_type))
                mt = loads(dumps(meta))


class UserDefinedTest(TestBase, AssertsCompiledSQL):
    """tests user-defined types."""

    def test_processing(self):

        global users
        users.insert().execute(
            user_id=2, goofy='jack', goofy2='jack', goofy4=u'jack',
            goofy7=u'jack', goofy8=12, goofy9=12)
        users.insert().execute(
            user_id=3, goofy='lala', goofy2='lala', goofy4=u'lala',
            goofy7=u'lala', goofy8=15, goofy9=15)
        users.insert().execute(
            user_id=4, goofy='fred', goofy2='fred', goofy4=u'fred',
            goofy7=u'fred', goofy8=9, goofy9=9)

        l = users.select().order_by(users.c.user_id).execute().fetchall()
        for assertstr, assertint, assertint2, row in zip(
            ["BIND_INjackBIND_OUT", "BIND_INlalaBIND_OUT", "BIND_INfredBIND_OUT"],
            [1200, 1500, 900],
            [1800, 2250, 1350],
            l
        ):
            for col in list(row)[1:5]:
                eq_(col, assertstr)
            eq_(row[5], assertint)
            eq_(row[6], assertint2)
            for col in row[3], row[4]:
                assert isinstance(col, unicode)

    def test_typedecorator_impl(self):
        for impl_, exp, kw in [
            (Float, "FLOAT", {}),
            (Float, "FLOAT(2)", {'precision':2}),
            (Float(2), "FLOAT(2)", {'precision':4}),
            (Numeric(19, 2), "NUMERIC(19, 2)", {}),
        ]:
            for dialect_ in (postgresql, mssql, mysql):
                dialect_ = dialect_.dialect()

                raw_impl = types.to_instance(impl_, **kw)

                class MyType(types.TypeDecorator):
                    impl = impl_

                dec_type = MyType(**kw)

                eq_(dec_type.impl.__class__, raw_impl.__class__)

                raw_dialect_impl = raw_impl.dialect_impl(dialect_)
                dec_dialect_impl = dec_type.dialect_impl(dialect_)
                eq_(dec_dialect_impl.__class__, MyType)
                eq_(raw_dialect_impl.__class__ , dec_dialect_impl.impl.__class__)

                self.assert_compile(
                    MyType(**kw),
                    exp,
                    dialect=dialect_
                )

    def test_user_defined_typedec_impl(self):
        class MyType(types.TypeDecorator):
            impl = Float

            def load_dialect_impl(self, dialect):
                if dialect.name == 'sqlite':
                    return String(50)
                else:
                    return super(MyType, self).load_dialect_impl(dialect)

        sl = sqlite.dialect()
        pg = postgresql.dialect()
        t = MyType()
        self.assert_compile(t, "VARCHAR(50)", dialect=sl)
        self.assert_compile(t, "FLOAT", dialect=pg)
        eq_(
            t.dialect_impl(dialect=sl).impl.__class__, 
            String().dialect_impl(dialect=sl).__class__
        )
        eq_(
                t.dialect_impl(dialect=pg).impl.__class__, 
                Float().dialect_impl(pg).__class__
        )

    @testing.provide_metadata
    def test_type_coerce(self):
        """test ad-hoc usage of custom types with type_coerce()."""

        class MyType(types.TypeDecorator):
            impl = String

            def process_bind_param(self, value, dialect):
                return value[0:-8]

            def process_result_value(self, value, dialect):
                return value + "BIND_OUT"

        t = Table('t', metadata, Column('data', String(50)))
        metadata.create_all()

        t.insert().values(data=type_coerce('d1BIND_OUT',MyType)).execute()

        eq_(
            select([type_coerce(t.c.data, MyType)]).execute().fetchall(),
            [('d1BIND_OUT', )]
        )

        eq_(
            select([t.c.data, type_coerce(t.c.data, MyType)]).execute().fetchall(),
            [('d1', 'd1BIND_OUT')]
        )

        eq_(
            select([t.c.data, type_coerce(t.c.data, MyType)]).\
                        where(type_coerce(t.c.data, MyType) == 'd1BIND_OUT').\
                        execute().fetchall(),
            [('d1', 'd1BIND_OUT')]
        )

        eq_(
            select([t.c.data, type_coerce(t.c.data, MyType)]).\
                        where(t.c.data == type_coerce('d1BIND_OUT', MyType)).\
                        execute().fetchall(),
            [('d1', 'd1BIND_OUT')]
        )

        eq_(
            select([t.c.data, type_coerce(t.c.data, MyType)]).\
                        where(t.c.data == type_coerce(None, MyType)).\
                        execute().fetchall(),
            []
        )

        eq_(
            select([t.c.data, type_coerce(t.c.data, MyType)]).\
                        where(type_coerce(t.c.data, MyType) == None).\
                        execute().fetchall(),
            []
        )

    @classmethod
    def setup_class(cls):
        global users, metadata

        class MyType(types.UserDefinedType):
            def get_col_spec(self):
                return "VARCHAR(100)"
            def bind_processor(self, dialect):
                def process(value):
                    return "BIND_IN"+ value
                return process
            def result_processor(self, dialect, coltype):
                def process(value):
                    return value + "BIND_OUT"
                return process
            def adapt(self, typeobj):
                return typeobj()

        class MyDecoratedType(types.TypeDecorator):
            impl = String
            def bind_processor(self, dialect):
                impl_processor = super(MyDecoratedType, self).bind_processor(dialect)\
                                        or (lambda value:value)
                def process(value):
                    return "BIND_IN"+ impl_processor(value)
                return process
            def result_processor(self, dialect, coltype):
                impl_processor = super(MyDecoratedType, self).result_processor(dialect, coltype)\
                                        or (lambda value:value)
                def process(value):
                    return impl_processor(value) + "BIND_OUT"
                return process
            def copy(self):
                return MyDecoratedType()

        class MyNewUnicodeType(types.TypeDecorator):
            impl = Unicode

            def process_bind_param(self, value, dialect):
                return "BIND_IN" + value

            def process_result_value(self, value, dialect):
                return value + "BIND_OUT"

            def copy(self):
                return MyNewUnicodeType(self.impl.length)

        class MyNewIntType(types.TypeDecorator):
            impl = Integer

            def process_bind_param(self, value, dialect):
                return value * 10

            def process_result_value(self, value, dialect):
                return value * 10

            def copy(self):
                return MyNewIntType()

        class MyNewIntSubClass(MyNewIntType):
            def process_result_value(self, value, dialect):
                return value * 15

            def copy(self):
                return MyNewIntSubClass()

        class MyUnicodeType(types.TypeDecorator):
            impl = Unicode

            def bind_processor(self, dialect):
                impl_processor = super(MyUnicodeType, self).bind_processor(dialect)\
                                        or (lambda value:value)

                def process(value):
                    return "BIND_IN"+ impl_processor(value)
                return process

            def result_processor(self, dialect, coltype):
                impl_processor = super(MyUnicodeType, self).result_processor(dialect, coltype)\
                                        or (lambda value:value)
                def process(value):
                    return impl_processor(value) + "BIND_OUT"
                return process

            def copy(self):
                return MyUnicodeType(self.impl.length)

        metadata = MetaData(testing.db)
        users = Table('type_users', metadata,
            Column('user_id', Integer, primary_key = True),
            # totall custom type
            Column('goofy', MyType, nullable = False),

            # decorated type with an argument, so its a String
            Column('goofy2', MyDecoratedType(50), nullable = False),

            Column('goofy4', MyUnicodeType(50), nullable = False),
            Column('goofy7', MyNewUnicodeType(50), nullable = False),
            Column('goofy8', MyNewIntType, nullable = False),
            Column('goofy9', MyNewIntSubClass, nullable = False),
        )

        metadata.create_all()

    @classmethod
    def teardown_class(cls):
        metadata.drop_all()

class UnicodeTest(TestBase, AssertsExecutionResults):
    """tests the Unicode type.  also tests the TypeDecorator with instances in the types package."""

    @classmethod
    def setup_class(cls):
        global unicode_table, metadata
        metadata = MetaData(testing.db)
        unicode_table = Table('unicode_table', metadata,
            Column('id', Integer, Sequence('uni_id_seq', optional=True), primary_key=True),
            Column('unicode_varchar', Unicode(250)),
            Column('unicode_text', UnicodeText),
            )
        metadata.create_all()

    @classmethod
    def teardown_class(cls):
        metadata.drop_all()

    @engines.close_first
    def teardown(self):
        unicode_table.delete().execute()

    def test_native_unicode(self):
        """assert expected values for 'native unicode' mode"""

        if \
	     (testing.against('mssql+pyodbc') and not testing.db.dialect.freetds):
            assert testing.db.dialect.returns_unicode_strings == 'conditional'
            return

        if testing.against('mssql+pymssql'):
            assert testing.db.dialect.returns_unicode_strings == ('charset' in testing.db.url.query)
            return

        assert testing.db.dialect.returns_unicode_strings == \
            ((testing.db.name, testing.db.driver) in \
            (
                ('postgresql','psycopg2'),
                ('postgresql','pypostgresql'),
                ('postgresql','pg8000'),
                ('postgresql','zxjdbc'),
                ('mysql','oursql'),
                ('mysql','zxjdbc'),
                ('mysql','mysqlconnector'),
                ('sqlite','pysqlite'),
                ('oracle','zxjdbc'),
                ('oracle','cx_oracle'),
            )), \
            "name: %s driver %s returns_unicode_strings=%s" % \
                                        (testing.db.name, 
                                         testing.db.driver, 
                                         testing.db.dialect.returns_unicode_strings)

    def test_round_trip(self):
        unicodedata = u"Alors vous imaginez ma surprise, au lever du jour, "\
                    u"quand une drôle de petit voix m’a réveillé. Elle "\
                    u"disait: « S’il vous plaît… dessine-moi un mouton! »"

        unicode_table.insert().execute(unicode_varchar=unicodedata,unicode_text=unicodedata)

        x = unicode_table.select().execute().first()
        assert isinstance(x['unicode_varchar'], unicode)
        assert isinstance(x['unicode_text'], unicode)
        eq_(x['unicode_varchar'], unicodedata)
        eq_(x['unicode_text'], unicodedata)

    def test_round_trip_executemany(self):
        # cx_oracle was producing different behavior for cursor.executemany()
        # vs. cursor.execute()

        unicodedata = u"Alors vous imaginez ma surprise, au lever du jour, quand "\
                        u"une drôle de petit voix m’a réveillé. "\
                        u"Elle disait: « S’il vous plaît… dessine-moi un mouton! »"

        unicode_table.insert().execute(
                dict(unicode_varchar=unicodedata,unicode_text=unicodedata),
                dict(unicode_varchar=unicodedata,unicode_text=unicodedata)
        )

        x = unicode_table.select().execute().first()
        assert isinstance(x['unicode_varchar'], unicode)
        eq_(x['unicode_varchar'], unicodedata)
        assert isinstance(x['unicode_text'], unicode)
        eq_(x['unicode_text'], unicodedata)

    def test_union(self):
        """ensure compiler processing works for UNIONs"""

        unicodedata = u"Alors vous imaginez ma surprise, au lever du jour, quand "\
                        u"une drôle de petit voix m’a réveillé. "\
                        u"Elle disait: « S’il vous plaît… dessine-moi un mouton! »"

        unicode_table.insert().execute(unicode_varchar=unicodedata,unicode_text=unicodedata)

        x = union(
                    select([unicode_table.c.unicode_varchar]),
                    select([unicode_table.c.unicode_varchar])
                ).execute().first()

        assert isinstance(x['unicode_varchar'], unicode)
        eq_(x['unicode_varchar'], unicodedata)

    @testing.fails_on('oracle', 'oracle converts empty strings to a blank space')
    def test_blank_strings(self):
        unicode_table.insert().execute(unicode_varchar=u'')
        assert select([unicode_table.c.unicode_varchar]).scalar() == u''

    def test_unicode_warnings(self):
        """test the warnings raised when SQLA must coerce unicode binds,
        *and* is using the Unicode type.

        """

        unicodedata = u"Alors vous imaginez ma surprise, au lever du jour, quand "\
                        u"une drôle de petit voix m’a réveillé. "\
                        u"Elle disait: « S’il vous plaît… dessine-moi un mouton! »"

        # using Unicode explicly - warning should be emitted
        u = Unicode()
        uni = u.dialect_impl(testing.db.dialect).bind_processor(testing.db.dialect)
        if testing.db.dialect.supports_unicode_binds:
            # Py3K
            #assert_raises(exc.SAWarning, uni, b'x')
            #assert isinstance(uni(unicodedata), str)
            # Py2K
            assert_raises(exc.SAWarning, uni, 'x')
            assert isinstance(uni(unicodedata), unicode)
            # end Py2K

            eq_(uni(unicodedata), unicodedata)
        else:
            # Py3K
            #assert_raises(exc.SAWarning, uni, b'x')
            #assert isinstance(uni(unicodedata), bytes)
            # Py2K
            assert_raises(exc.SAWarning, uni, 'x')
            assert isinstance(uni(unicodedata), str)
            # end Py2K

            eq_(uni(unicodedata), unicodedata.encode('utf-8'))

        # using convert unicode at engine level - 
        # this should not be raising a warning
        unicode_engine = engines.utf8_engine(options={'convert_unicode':True,})
        unicode_engine.dialect.supports_unicode_binds = False

        s = String()
        uni = s.dialect_impl(unicode_engine.dialect).bind_processor(unicode_engine.dialect)
        # this is not the unicode type - no warning
        # Py3K
        #uni(b'x')
        #assert isinstance(uni(unicodedata), bytes)
        # Py2K
        uni('x')
        assert isinstance(uni(unicodedata), str)
        # end Py2K

        eq_(uni(unicodedata), unicodedata.encode('utf-8'))

    @testing.fails_if(
                        lambda: testing.db_spec("postgresql+pg8000")(testing.db) and util.py3k,
                        "pg8000 appropriately does not accept 'bytes' for a VARCHAR column."
                        )
    def test_ignoring_unicode_error(self):
        """checks String(unicode_error='ignore') is passed to underlying codec."""

        unicodedata = u"Alors vous imaginez ma surprise, au lever du jour, quand "\
                        u"une drôle de petit voix m’a réveillé. "\
                        u"Elle disait: « S’il vous plaît… dessine-moi un mouton! »"

        asciidata = unicodedata.encode('ascii', 'ignore')

        m = MetaData()
        table = Table('unicode_err_table', m,
            Column('sort', Integer),
            Column('plain_varchar_no_coding_error', \
                    String(248, convert_unicode='force', unicode_error='ignore'))
            )

        m2 = MetaData()
        utf8_table = Table('unicode_err_table', m2,
            Column('sort', Integer),
            Column('plain_varchar_no_coding_error', \
                    String(248, convert_unicode=True))
            )

        engine = engines.testing_engine(options={'encoding':'ascii'})
        m.create_all(engine)
        try:
            # insert a row that should be ascii and 
            # coerce from unicode with ignore on the bind side
            engine.execute(
                table.insert(),
                sort=1,
                plain_varchar_no_coding_error=unicodedata
            )

            # switch to utf-8
            engine.dialect.encoding = 'utf-8'
            from binascii import hexlify

            # the row that we put in was stored as hexlified ascii
            row = engine.execute(utf8_table.select()).first()
            x = row['plain_varchar_no_coding_error']
            connect_opts = engine.dialect.create_connect_args(testing.db.url)[1]
            if connect_opts.get('use_unicode', False):
                x = x.encode('utf-8')
            a = hexlify(x)
            b = hexlify(asciidata)
            eq_(a, b)

            # insert another row which will be stored with
            # utf-8 only chars
            engine.execute(
                utf8_table.insert(),
                sort=2,
                plain_varchar_no_coding_error=unicodedata
            )

            # switch back to ascii
            engine.dialect.encoding = 'ascii'

            # one row will be ascii with ignores,
            # the other will be either ascii with the ignores
            # or just the straight unicode+ utf8 value if the 
            # dialect just returns unicode
            result = engine.execute(table.select().order_by(table.c.sort))
            ascii_row = result.fetchone()
            utf8_row = result.fetchone()
            result.close()

            x = ascii_row['plain_varchar_no_coding_error']
            # on python3 "x" comes back as string (i.e. unicode),
            # hexlify requires bytes
            a = hexlify(x.encode('utf-8'))
            b = hexlify(asciidata)
            eq_(a, b)

            x = utf8_row['plain_varchar_no_coding_error']
            if testing.against('mssql+pyodbc') and not testing.db.dialect.freetds:
                # TODO: no clue what this is
                eq_(
                      x,
                      u'Alors vous imaginez ma surprise, au lever du jour, quand une '
                      u'drle de petit voix ma rveill. Elle disait:  Sil vous plat '
                      u'dessine-moi un mouton! '
                )
            elif engine.dialect.returns_unicode_strings:
                eq_(x, unicodedata)
            else:
                a = hexlify(x)
                eq_(a, b)

        finally:
            m.drop_all(engine)


class EnumTest(TestBase):
    @classmethod
    def setup_class(cls):
        global enum_table, non_native_enum_table, metadata
        metadata = MetaData(testing.db)
        enum_table = Table('enum_table', metadata,
            Column("id", Integer, primary_key=True),
            Column('someenum', Enum('one','two','three', name='myenum'))
        )

        non_native_enum_table = Table('non_native_enum_table', metadata,
            Column("id", Integer, primary_key=True),
            Column('someenum', Enum('one','two','three', native_enum=False)),
        )

        metadata.create_all()

    def teardown(self):
        enum_table.delete().execute()
        non_native_enum_table.delete().execute()

    @classmethod
    def teardown_class(cls):
        metadata.drop_all()

    @testing.fails_on('postgresql+zxjdbc', 
                        'zxjdbc fails on ENUM: column "XXX" is of type XXX '
                        'but expression is of type character varying')
    @testing.fails_on('postgresql+pg8000', 
                        'zxjdbc fails on ENUM: column "XXX" is of type XXX '
                        'but expression is of type text')
    def test_round_trip(self):
        enum_table.insert().execute([
            {'id':1, 'someenum':'two'},
            {'id':2, 'someenum':'two'},
            {'id':3, 'someenum':'one'},
        ])

        eq_(
            enum_table.select().order_by(enum_table.c.id).execute().fetchall(), 
            [
                (1, 'two'),
                (2, 'two'),
                (3, 'one'),
            ]
        )

    def test_non_native_round_trip(self):
        non_native_enum_table.insert().execute([
            {'id':1, 'someenum':'two'},
            {'id':2, 'someenum':'two'},
            {'id':3, 'someenum':'one'},
        ])

        eq_(
            non_native_enum_table.select().
                    order_by(non_native_enum_table.c.id).execute().fetchall(), 
            [
                (1, 'two'),
                (2, 'two'),
                (3, 'one'),
            ]
        )

    def test_adapt(self):
        from sqlalchemy.dialects.postgresql import ENUM
        e1 = Enum('one','two','three', native_enum=False)
        eq_(e1.adapt(ENUM).native_enum, False)
        e1 = Enum('one','two','three', native_enum=True)
        eq_(e1.adapt(ENUM).native_enum, True)
        e1 = Enum('one','two','three', name='foo', schema='bar')
        eq_(e1.adapt(ENUM).name, 'foo')
        eq_(e1.adapt(ENUM).schema, 'bar')

    @testing.fails_on('mysql+mysqldb', "MySQL seems to issue a 'data truncated' warning.")
    def test_constraint(self):
        assert_raises(exc.DBAPIError, 
            enum_table.insert().execute,
            {'id':4, 'someenum':'four'}
        )

    @testing.fails_on('mysql', 
                    "the CHECK constraint doesn't raise an exception for unknown reason")
    def test_non_native_constraint(self):
        assert_raises(exc.DBAPIError, 
            non_native_enum_table.insert().execute,
            {'id':4, 'someenum':'four'}
        )

class BinaryTest(TestBase, AssertsExecutionResults):
    __excluded_on__ = (
        ('mysql', '<', (4, 1, 1)),  # screwy varbinary types
        )

    @classmethod
    def setup_class(cls):
        global binary_table, MyPickleType, metadata

        class MyPickleType(types.TypeDecorator):
            impl = PickleType

            def process_bind_param(self, value, dialect):
                if value:
                    value.stuff = 'this is modified stuff'
                return value

            def process_result_value(self, value, dialect):
                if value:
                    value.stuff = 'this is the right stuff'
                return value

        metadata = MetaData(testing.db)
        binary_table = Table('binary_table', metadata,
            Column('primary_id', Integer, primary_key=True, test_needs_autoincrement=True),
            Column('data', LargeBinary),
            Column('data_slice', LargeBinary(100)),
            Column('misc', String(30)),
            Column('pickled', PickleType),
            Column('mypickle', MyPickleType)
        )
        metadata.create_all()

    @engines.close_first
    def teardown(self):
        binary_table.delete().execute()

    @classmethod
    def teardown_class(cls):
        metadata.drop_all()

    def test_round_trip(self):
        testobj1 = pickleable.Foo('im foo 1')
        testobj2 = pickleable.Foo('im foo 2')
        testobj3 = pickleable.Foo('im foo 3')

        stream1 =self.load_stream('binary_data_one.dat')
        stream2 =self.load_stream('binary_data_two.dat')
        binary_table.insert().execute(
                            primary_id=1, 
                            misc='binary_data_one.dat', 
                            data=stream1, 
                            data_slice=stream1[0:100], 
                            pickled=testobj1, 
                            mypickle=testobj3)
        binary_table.insert().execute(
                            primary_id=2, 
                            misc='binary_data_two.dat', 
                            data=stream2, 
                            data_slice=stream2[0:99], 
                            pickled=testobj2)
        binary_table.insert().execute(
                            primary_id=3, 
                            misc='binary_data_two.dat', 
                            data=None, 
                            data_slice=stream2[0:99], 
                            pickled=None)

        for stmt in (
            binary_table.select(order_by=binary_table.c.primary_id),
            text(
                "select * from binary_table order by binary_table.primary_id", 
                typemap={'pickled':PickleType, 
                        'mypickle':MyPickleType, 
                        'data':LargeBinary, 'data_slice':LargeBinary}, 
                bind=testing.db)
        ):
            l = stmt.execute().fetchall()
            eq_(stream1, l[0]['data'])
            eq_(stream1[0:100], l[0]['data_slice'])
            eq_(stream2, l[1]['data'])
            eq_(testobj1, l[0]['pickled'])
            eq_(testobj2, l[1]['pickled'])
            eq_(testobj3.moredata, l[0]['mypickle'].moredata)
            eq_(l[0]['mypickle'].stuff, 'this is the right stuff')

    @testing.fails_on('oracle+cx_oracle', 'oracle fairly grumpy about binary '
                                        'data, not really known how to make this work')
    def test_comparison(self):
        """test that type coercion occurs on comparison for binary"""

        expr = binary_table.c.data == 'foo'
        assert isinstance(expr.right.type, LargeBinary)

        data = os.urandom(32)
        binary_table.insert().execute(data=data)
        eq_(binary_table.select().where(binary_table.c.data==data).alias().count().scalar(), 1)


    def load_stream(self, name):
        f = os.path.join(os.path.dirname(__file__), "..", name)
        return open(f, mode='rb').read()

class ExpressionTest(TestBase, AssertsExecutionResults, AssertsCompiledSQL):
    @classmethod
    def setup_class(cls):
        global test_table, meta, MyCustomType, MyTypeDec

        class MyCustomType(types.UserDefinedType):
            def get_col_spec(self):
                return "INT"
            def bind_processor(self, dialect):
                def process(value):
                    return value * 10
                return process
            def result_processor(self, dialect, coltype):
                def process(value):
                    return value / 10
                return process
            def adapt_operator(self, op):
                return {operators.add:operators.sub, operators.sub:operators.add}.get(op, op)

        class MyTypeDec(types.TypeDecorator):
            impl = String

            def process_bind_param(self, value, dialect):
                return "BIND_IN" + str(value)

            def process_result_value(self, value, dialect):
                return value + "BIND_OUT"

        meta = MetaData(testing.db)
        test_table = Table('test', meta,
            Column('id', Integer, primary_key=True),
            Column('data', String(30)),
            Column('atimestamp', Date),
            Column('avalue', MyCustomType),
            Column('bvalue', MyTypeDec(50)),
            )

        meta.create_all()

        test_table.insert().execute({
                                'id':1, 
                                'data':'somedata', 
                                'atimestamp':datetime.date(2007, 10, 15), 
                                'avalue':25, 'bvalue':'foo'})

    @classmethod
    def teardown_class(cls):
        meta.drop_all()

    def test_control(self):
        assert testing.db.execute("select avalue from test").scalar() == 250

        eq_(
            test_table.select().execute().fetchall(),
            [(1, 'somedata', datetime.date(2007, 10, 15), 25,
             'BIND_INfooBIND_OUT')]
        )

    def test_bind_adapt(self):
        # test an untyped bind gets the left side's type
        expr = test_table.c.atimestamp == bindparam("thedate")
        eq_(expr.right.type._type_affinity, Date)

        eq_(
            testing.db.execute(
                    select([test_table.c.id, test_table.c.data, test_table.c.atimestamp])
                    .where(expr), 
                    {"thedate":datetime.date(2007, 10, 15)}).fetchall(),
            [(1, 'somedata', datetime.date(2007, 10, 15))]
        )

        expr = test_table.c.avalue == bindparam("somevalue")
        eq_(expr.right.type._type_affinity, MyCustomType)

        eq_(
            testing.db.execute(test_table.select().where(expr),
             {'somevalue': 25}).fetchall(),
            [(1, 'somedata', datetime.date(2007, 10, 15), 25,
             'BIND_INfooBIND_OUT')]
        )

        expr = test_table.c.bvalue == bindparam("somevalue")
        eq_(expr.right.type._type_affinity, String)

        eq_(
            testing.db.execute(test_table.select().where(expr), 
                {"somevalue":"foo"}).fetchall(),
            [(1, 'somedata', 
                datetime.date(2007, 10, 15), 25, 'BIND_INfooBIND_OUT')]
        )

    def test_literal_adapt(self):
        # literals get typed based on the types dictionary, unless
        # compatible with the left side type

        expr = column('foo', String) == 5
        eq_(expr.right.type._type_affinity, Integer)

        expr = column('foo', String) == "asdf"
        eq_(expr.right.type._type_affinity, String)

        expr = column('foo', CHAR) == 5
        eq_(expr.right.type._type_affinity, Integer)

        expr = column('foo', CHAR) == "asdf"
        eq_(expr.right.type.__class__, CHAR)


    @testing.fails_on('firebird', 'Data type unknown on the parameter')
    def test_operator_adapt(self):
        """test type-based overloading of operators"""

        # test string concatenation
        expr = test_table.c.data + "somedata"
        assert testing.db.execute(select([expr])).scalar() == "somedatasomedata"

        expr = test_table.c.id + 15
        assert testing.db.execute(select([expr])).scalar() == 16

        # test custom operator conversion
        expr = test_table.c.avalue + 40
        assert expr.type.__class__ is test_table.c.avalue.type.__class__

        # value here is calculated as (250 - 40) / 10 = 21
        # because "40" is an integer, not an "avalue"
        assert testing.db.execute(select([expr.label('foo')])).scalar() == 21

        expr = test_table.c.avalue + literal(40, type_=MyCustomType)

        # + operator converted to -
        # value is calculated as: (250 - (40 * 10)) / 10 == -15
        assert testing.db.execute(select([expr.label('foo')])).scalar() == -15

        # this one relies upon anonymous labeling to assemble result
        # processing rules on the column.
        assert testing.db.execute(select([expr])).scalar() == -15

    def test_typedec_operator_adapt(self):
        expr = test_table.c.bvalue + "hi"

        assert expr.type.__class__ is MyTypeDec
        assert expr.right.type.__class__ is MyTypeDec

        eq_(
            testing.db.execute(select([expr.label('foo')])).scalar(),
            "BIND_INfooBIND_INhiBIND_OUT"
        )

    def test_typedec_righthand_coercion(self):
        class MyTypeDec(types.TypeDecorator):
            impl = String

            def process_bind_param(self, value, dialect):
                return "BIND_IN" + str(value)

            def process_result_value(self, value, dialect):
                return value + "BIND_OUT"

        tab = table('test', column('bvalue', MyTypeDec))
        expr = tab.c.bvalue + 6

        self.assert_compile(
            expr,
            "test.bvalue || :bvalue_1",
            use_default_dialect=True
        )

        assert expr.type.__class__ is MyTypeDec
        eq_(
            testing.db.execute(select([expr.label('foo')])).scalar(),
            "BIND_INfooBIND_IN6BIND_OUT"
        )


    def test_bind_typing(self):
        from sqlalchemy.sql import column

        class MyFoobarType(types.UserDefinedType):
            pass

        class Foo(object):
            pass

        # unknown type + integer, right hand bind
        # is an Integer
        expr = column("foo", MyFoobarType) + 5
        assert expr.right.type._type_affinity is types.Integer

        # untyped bind - it gets assigned MyFoobarType
        expr = column("foo", MyFoobarType) + bindparam("foo")
        assert expr.right.type._type_affinity is MyFoobarType

        expr = column("foo", MyFoobarType) + bindparam("foo", type_=Integer)
        assert expr.right.type._type_affinity is types.Integer

        # unknown type + unknown, right hand bind
        # coerces to the left
        expr = column("foo", MyFoobarType) + Foo()
        assert expr.right.type._type_affinity is MyFoobarType

        # including for non-commutative ops
        expr = column("foo", MyFoobarType) - Foo()
        assert expr.right.type._type_affinity is MyFoobarType

        expr = column("foo", MyFoobarType) - datetime.date(2010, 8, 25)
        assert expr.right.type._type_affinity is types.Date

    def test_date_coercion(self):
        from sqlalchemy.sql import column

        expr = column('bar', types.NULLTYPE) - column('foo', types.TIMESTAMP)
        eq_(expr.type._type_affinity, types.NullType)

        expr = func.sysdate() - column('foo', types.TIMESTAMP)
        eq_(expr.type._type_affinity, types.Interval)

        expr = func.current_date() - column('foo', types.TIMESTAMP)
        eq_(expr.type._type_affinity, types.Interval)

    def test_numerics_coercion(self):
        from sqlalchemy.sql import column
        import operator

        for op in (
            operator.add,
            operator.mul,
            operator.truediv,
            operator.sub
        ):
            for other in (Numeric(10, 2), Integer):
                expr = op(
                        column('bar', types.Numeric(10, 2)),
                        column('foo', other)
                       )
                assert isinstance(expr.type, types.Numeric)
                expr = op(
                        column('foo', other),
                        column('bar', types.Numeric(10, 2))
                       )
                assert isinstance(expr.type, types.Numeric)

    def test_null_comparison(self):
        eq_(
            str(column('a', types.NullType()) + column('b', types.NullType())), 
            "a + b"
        )

    def test_expression_typing(self):
        expr = column('bar', Integer) - 3

        eq_(expr.type._type_affinity, Integer)

        expr = bindparam('bar') + bindparam('foo')
        eq_(expr.type, types.NULLTYPE)

    def test_distinct(self):
        s = select([distinct(test_table.c.avalue)])
        eq_(testing.db.execute(s).scalar(), 25)

        s = select([test_table.c.avalue.distinct()])
        eq_(testing.db.execute(s).scalar(), 25)

        assert distinct(test_table.c.data).type == test_table.c.data.type
        assert test_table.c.data.distinct().type == test_table.c.data.type

class CompileTest(TestBase, AssertsCompiledSQL):
    def test_default_compile(self):
        """test that the base dialect of the type object is used
        for default compilation.

        """
        for type_, expected in (
            (String(), "VARCHAR"),
            (Integer(), "INTEGER"),
            (postgresql.INET(), "INET"),
            (postgresql.FLOAT(), "FLOAT"),
            (mysql.REAL(precision=8, scale=2), "REAL(8, 2)"),
            (postgresql.REAL(), "REAL"),
            (INTEGER(), "INTEGER"),
            (mysql.INTEGER(display_width=5), "INTEGER(5)")
        ):
            self.assert_compile(type_, expected)

class DateTest(TestBase, AssertsExecutionResults):
    @classmethod
    def setup_class(cls):
        global users_with_date, insert_data

        db = testing.db
        if testing.against('oracle'):
            insert_data =  [
                    (7, 'jack',
                     datetime.datetime(2005, 11, 10, 0, 0),
                     datetime.date(2005,11,10),
                     datetime.datetime(2005, 11, 10, 0, 0, 0, 29384)),
                    (8, 'roy',
                     datetime.datetime(2005, 11, 10, 11, 52, 35),
                     datetime.date(2005,10,10),
                     datetime.datetime(2006, 5, 10, 15, 32, 47, 6754)),
                    (9, 'foo',
                     datetime.datetime(2006, 11, 10, 11, 52, 35),
                     datetime.date(1970,4,1),
                     datetime.datetime(2004, 9, 18, 4, 0, 52, 1043)),
                    (10, 'colber', None, None, None),
             ]
            fnames = ['user_id', 'user_name', 'user_datetime',
                      'user_date', 'user_time']

            collist = [Column('user_id', INT, primary_key=True),
                       Column('user_name', VARCHAR(20)),
                       Column('user_datetime', DateTime),
                       Column('user_date', Date),
                       Column('user_time', TIMESTAMP)]
        else:
            datetime_micro = 54839
            time_micro = 999

            # Missing or poor microsecond support:
            if testing.against('mssql', 'mysql', 'firebird', '+zxjdbc'):
                datetime_micro, time_micro = 0, 0
            # No microseconds for TIME
            elif testing.against('maxdb'):
                time_micro = 0

            insert_data =  [
                (7, 'jack',
                 datetime.datetime(2005, 11, 10, 0, 0),
                 datetime.date(2005, 11, 10),
                 datetime.time(12, 20, 2)),
                (8, 'roy',
                 datetime.datetime(2005, 11, 10, 11, 52, 35),
                 datetime.date(2005, 10, 10),
                 datetime.time(0, 0, 0)),
                (9, 'foo',
                 datetime.datetime(2005, 11, 10, 11, 52, 35, datetime_micro),
                 datetime.date(1970, 4, 1),
                 datetime.time(23, 59, 59, time_micro)),
                (10, 'colber', None, None, None),
            ]


            fnames = ['user_id', 'user_name', 'user_datetime',
                      'user_date', 'user_time']

            collist = [Column('user_id', INT, primary_key=True),
                       Column('user_name', VARCHAR(20)),
                       Column('user_datetime', DateTime(timezone=False)),
                       Column('user_date', Date),
                       Column('user_time', Time)]

        if testing.against('sqlite', 'postgresql'):
            insert_data.append(
                (11, 'historic',
                datetime.datetime(1850, 11, 10, 11, 52, 35, datetime_micro),
                datetime.date(1727,4,1),
                None),
            )

        users_with_date = Table('query_users_with_date',
                                MetaData(testing.db), *collist)
        users_with_date.create()
        insert_dicts = [dict(zip(fnames, d)) for d in insert_data]

        for idict in insert_dicts:
            users_with_date.insert().execute(**idict)

    @classmethod
    def teardown_class(cls):
        users_with_date.drop()

    def testdate(self):
        global insert_data

        l = map(tuple,
                users_with_date.select().order_by(users_with_date.c.user_id).execute().fetchall())
        self.assert_(l == insert_data,
                     'DateTest mismatch: got:%s expected:%s' % (l, insert_data))

    def testtextdate(self):
        x = testing.db.text(
            "select user_datetime from query_users_with_date",
            typemap={'user_datetime':DateTime}).execute().fetchall()

        self.assert_(isinstance(x[0][0], datetime.datetime))

        x = testing.db.text(
            "select * from query_users_with_date where user_datetime=:somedate",
            bindparams=[bindparam('somedate', type_=types.DateTime)]).execute(
            somedate=datetime.datetime(2005, 11, 10, 11, 52, 35)).fetchall()

    def testdate2(self):
        meta = MetaData(testing.db)
        t = Table('testdate', meta,
                  Column('id', Integer,
                         Sequence('datetest_id_seq', optional=True),
                         primary_key=True),
                Column('adate', Date), Column('adatetime', DateTime))
        t.create(checkfirst=True)
        try:
            d1 = datetime.date(2007, 10, 30)
            t.insert().execute(adate=d1, adatetime=d1)
            d2 = datetime.datetime(2007, 10, 30)
            t.insert().execute(adate=d2, adatetime=d2)

            x = t.select().execute().fetchall()[0]
            eq_(x.adate.__class__, datetime.date)
            eq_(x.adatetime.__class__, datetime.datetime)

            t.delete().execute()

            # test mismatched date/datetime
            t.insert().execute(adate=d2, adatetime=d2)
            eq_(select([t.c.adate, t.c.adatetime], t.c.adate==d1).execute().fetchall(), [(d1, d2)])
            eq_(select([t.c.adate, t.c.adatetime], t.c.adate==d1).execute().fetchall(), [(d1, d2)])

        finally:
            t.drop(checkfirst=True)

class StringTest(TestBase):

    @testing.requires.unbounded_varchar
    def test_nolength_string(self):
        metadata = MetaData(testing.db)
        foo = Table('foo', metadata, Column('one', String))

        foo.create()
        foo.drop()

class NumericTest(TestBase):
    def setup(self):
        global metadata
        metadata = MetaData(testing.db)

    def teardown(self):
        metadata.drop_all()

    @testing.emits_warning(r".*does \*not\* support Decimal objects natively")
    def _do_test(self, type_, input_, output, filter_ = None):
        t = Table('t', metadata, Column('x', type_))
        t.create()
        t.insert().execute([{'x':x} for x in input_])

        result = set([row[0] for row in t.select().execute()])
        output = set(output)
        if filter_:
            result = set(filter_(x) for x in result)
            output = set(filter_(x) for x in output)
        #print result
        #print output
        eq_(result, output)

    def test_numeric_as_decimal(self):
        self._do_test(
            Numeric(precision=8, scale=4),
            [15.7563, Decimal("15.7563"), None],
            [Decimal("15.7563"), None], 
        )

    def test_numeric_as_float(self):
        if testing.against("oracle+cx_oracle"):
            filter_ = lambda n:n is not None and round(n, 5) or None
        else:
            filter_ = None

        self._do_test(
            Numeric(precision=8, scale=4, asdecimal=False),
            [15.7563, Decimal("15.7563"), None],
            [15.7563, None],
            filter_ = filter_
        )

    def test_float_as_decimal(self):
        self._do_test(
            Float(precision=8, asdecimal=True),
            [15.7563, Decimal("15.7563"), None],
            [Decimal("15.7563"), None], 
            filter_ = lambda n:n is not None and round(n, 5) or None
        )

    def test_float_as_float(self):
        self._do_test(
            Float(precision=8),
            [15.7563, Decimal("15.7563")],
            [15.7563],
            filter_ = lambda n:n is not None and round(n, 5) or None
        )

    @testing.fails_on('mssql+pymssql', 'FIXME: improve pymssql dec handling')
    def test_precision_decimal(self):
        numbers = set([
            decimal.Decimal("54.234246451650"),
            decimal.Decimal("0.004354"), 
            decimal.Decimal("900.0"), 
        ])

        self._do_test(
            Numeric(precision=18, scale=12),
            numbers,
            numbers,
        )

    @testing.fails_on('mssql+pymssql', 'FIXME: improve pymssql dec handling')
    def test_enotation_decimal(self):
        """test exceedingly small decimals.

        Decimal reports values with E notation when the exponent 
        is greater than 6.

        """

        numbers = set([
            decimal.Decimal('1E-2'),
            decimal.Decimal('1E-3'),
            decimal.Decimal('1E-4'),
            decimal.Decimal('1E-5'),
            decimal.Decimal('1E-6'),
            decimal.Decimal('1E-7'),
            decimal.Decimal('1E-8'),
            decimal.Decimal("0.01000005940696"),
            decimal.Decimal("0.00000005940696"),
            decimal.Decimal("0.00000000000696"),
            decimal.Decimal("0.70000000000696"),
            decimal.Decimal("696E-12"),
        ])
        self._do_test(
            Numeric(precision=18, scale=14),
            numbers,
            numbers
        )

    @testing.fails_on("sybase+pyodbc", 
                        "Don't know how do get these values through FreeTDS + Sybase")
    @testing.fails_on("firebird", "Precision must be from 1 to 18")
    def test_enotation_decimal_large(self):
        """test exceedingly large decimals.

        """

        numbers = set([
            decimal.Decimal('4E+8'),
            decimal.Decimal("5748E+15"),
            decimal.Decimal('1.521E+15'),
            decimal.Decimal('00000000000000.1E+12'),
        ])
        self._do_test(
            Numeric(precision=25, scale=2),
            numbers,
            numbers
        )

    @testing.fails_on('sqlite', 'TODO')
    @testing.fails_on('postgresql+pg8000', 'TODO')
    @testing.fails_on("firebird", "Precision must be from 1 to 18")
    @testing.fails_on("sybase+pysybase", "TODO")
    @testing.fails_on('mssql+pymssql', 'FIXME: improve pymssql dec handling')
    def test_many_significant_digits(self):
        numbers = set([
            decimal.Decimal("31943874831932418390.01"),
            decimal.Decimal("319438950232418390.273596"),
            decimal.Decimal("87673.594069654243"),
        ])
        self._do_test(
            Numeric(precision=38, scale=12),
            numbers,
            numbers
        )



class IntervalTest(TestBase, AssertsExecutionResults):
    @classmethod
    def setup_class(cls):
        global interval_table, metadata
        metadata = MetaData(testing.db)
        interval_table = Table("intervaltable", metadata,
            Column("id", Integer, primary_key=True, test_needs_autoincrement=True),
            Column("native_interval", Interval()),
            Column("native_interval_args", Interval(day_precision=3, second_precision=6)),
            Column("non_native_interval", Interval(native=False)),
            )
        metadata.create_all()

    @engines.close_first
    def teardown(self):
        interval_table.delete().execute()

    @classmethod
    def teardown_class(cls):
        metadata.drop_all()

    @testing.fails_on("+pg8000", "Not yet known how to pass values of the INTERVAL type")
    @testing.fails_on("postgresql+zxjdbc", "Not yet known how to pass values of the INTERVAL type")
    @testing.fails_on("oracle+zxjdbc", "Not yet known how to pass values of the INTERVAL type")
    def test_roundtrip(self):
        small_delta = datetime.timedelta(days=15, seconds=5874)
        delta = datetime.timedelta(414)
        interval_table.insert().execute(
                                native_interval=small_delta, 
                                native_interval_args=delta, 
                                non_native_interval=delta
                                )
        row = interval_table.select().execute().first()
        eq_(row['native_interval'], small_delta)
        eq_(row['native_interval_args'], delta)
        eq_(row['non_native_interval'], delta)

    @testing.fails_on("oracle+zxjdbc", "Not yet known how to pass values of the INTERVAL type")
    def test_null(self):
        interval_table.insert().execute(id=1, native_inverval=None, non_native_interval=None)
        row = interval_table.select().execute().first()
        eq_(row['native_interval'], None)
        eq_(row['native_interval_args'], None)
        eq_(row['non_native_interval'], None)


class BooleanTest(TestBase, AssertsExecutionResults):
    @classmethod
    def setup_class(cls):
        global bool_table
        metadata = MetaData(testing.db)
        bool_table = Table('booltest', metadata,
            Column('id', Integer, primary_key=True, autoincrement=False),
            Column('value', Boolean),
            Column('unconstrained_value', Boolean(create_constraint=False)),
            )
        bool_table.create()

    @classmethod
    def teardown_class(cls):
        bool_table.drop()

    def teardown(self):
        bool_table.delete().execute()

    def test_boolean(self):
        bool_table.insert().execute(id=1, value=True)
        bool_table.insert().execute(id=2, value=False)
        bool_table.insert().execute(id=3, value=True)
        bool_table.insert().execute(id=4, value=True)
        bool_table.insert().execute(id=5, value=True)
        bool_table.insert().execute(id=6, value=None)

        res = select([bool_table.c.id, bool_table.c.value]).where(
            bool_table.c.value == True
            ).order_by(bool_table.c.id).execute().fetchall()
        eq_(res, [(1, True), (3, True), (4, True), (5, True)])

        res2 = select([bool_table.c.id, bool_table.c.value]).where(
                    bool_table.c.value == False).execute().fetchall()
        eq_(res2, [(2, False)])

        res3 = select([bool_table.c.id, bool_table.c.value]).\
                order_by(bool_table.c.id).\
                execute().fetchall()
        eq_(res3, [(1, True), (2, False), 
                    (3, True), (4, True), 
                    (5, True), (6, None)])

        # ensure we're getting True/False, not just ints
        assert res3[0][1] is True
        assert res3[1][1] is False

    @testing.fails_on('mysql', 
            "The CHECK clause is parsed but ignored by all storage engines.")
    @testing.fails_on('mssql', 
            "FIXME: MS-SQL 2005 doesn't honor CHECK ?!?")
    @testing.skip_if(lambda: testing.db.dialect.supports_native_boolean)
    def test_constraint(self):
        assert_raises((exc.IntegrityError, exc.ProgrammingError),
                        testing.db.execute, 
                        "insert into booltest (id, value) values(1, 5)")

    @testing.skip_if(lambda: testing.db.dialect.supports_native_boolean)
    def test_unconstrained(self):
        testing.db.execute(
            "insert into booltest (id, unconstrained_value) values (1, 5)")

class PickleTest(TestBase):
    def test_eq_comparison(self):
        p1 = PickleType()

        for obj in (
            {'1':'2'},
            pickleable.Bar(5, 6),
            pickleable.OldSchool(10, 11)
        ):
            assert p1.compare_values(p1.copy_value(obj), obj)

        assert_raises(NotImplementedError, 
                        p1.compare_values,
                        pickleable.BrokenComparable('foo'),
                        pickleable.BrokenComparable('foo'))

    def test_nonmutable_comparison(self):
        p1 = PickleType()

        for obj in (
            {'1':'2'},
            pickleable.Bar(5, 6),
            pickleable.OldSchool(10, 11)
        ):
            assert p1.compare_values(p1.copy_value(obj), obj)

class CallableTest(TestBase):
    @classmethod
    def setup_class(cls):
        global meta
        meta = MetaData(testing.db)

    @classmethod
    def teardown_class(cls):
        meta.drop_all()

    def test_callable_as_arg(self):
        ucode = util.partial(Unicode)

        thing_table = Table('thing', meta,
            Column('name', ucode(20))
        )
        assert isinstance(thing_table.c.name.type, Unicode)
        thing_table.create()

    def test_callable_as_kwarg(self):
        ucode = util.partial(Unicode)

        thang_table = Table('thang', meta,
            Column('name', type_=ucode(20), primary_key=True)
        )
        assert isinstance(thang_table.c.name.type, Unicode)
        thang_table.create()

