from logilab.common.testlib import TestCase, unittest_main

from cubicweb.schema import Schema, EntitySchema

import re

from cubicweb.devtools.fill import ValueGenerator, _ValueGenerator

ISODATE_SRE = re.compile('(?P<year>\d{4})-(?P<month>\d{2})-(?P<day>\d{2})$')

class AutoExtendableTC(TestCase):

    def setUp(self):

        self.attrvalues = dir(_ValueGenerator)

    def tearDown(self):

        attrvalues = set(dir(_ValueGenerator))

        for attrname in attrvalues - set(self.attrvalues):

            delattr(_ValueGenerator, attrname)

    def test_autoextend(self):

        self.failIf('generate_server' in dir(ValueGenerator))

        class MyValueGenerator(ValueGenerator):

            def generate_server(self, index):

                return attrname

        self.failUnless('generate_server' in dir(ValueGenerator))

    def test_bad_signature_detection(self):

        self.failIf('generate_server' in dir(ValueGenerator))

        try:

            class MyValueGenerator(ValueGenerator):

                def generate_server(self):

                    pass

        except TypeError:

            self.failIf('generate_server' in dir(ValueGenerator))

        else:

            self.fail('TypeError not raised')

    def test_signature_extension(self):

        self.failIf('generate_server' in dir(ValueGenerator))

        class MyValueGenerator(ValueGenerator):

            def generate_server(self, index, foo):

                pass

        self.failUnless('generate_server' in dir(ValueGenerator))

if __name__ == '__main__':

    unittest_main()