##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Tuple field tests.

$Id: test_tuplefield.py 37557 2005-07-29 18:19:31Z benji_york $
"""
from unittest import TestSuite, main, makeSuite

from zope.interface import implements
from zope.schema import Field, Tuple, Int
from zope.schema.interfaces import IField
from zope.schema.interfaces import ICollection, ISequence, ITuple
from zope.schema.interfaces import NotAContainer, RequiredMissing
from zope.schema.interfaces import WrongContainedType, WrongType, NotUnique
from zope.schema.interfaces import TooShort, TooLong
from zope.schema.tests.test_field import FieldTestBase

class TupleTest(FieldTestBase):
    """Test the Tuple Field."""

    _Field_Factory = Tuple

    def testValidate(self):
        field = Tuple(title=u'Tuple field', description=u'',
                      readonly=False, required=False)
        field.validate(None)
        field.validate(())
        field.validate((1, 2))
        field.validate((3,))

        self.assertRaises(WrongType, field.validate, [1, 2, 3])
        self.assertRaises(WrongType, field.validate, 'abc')
        self.assertRaises(WrongType, field.validate, 1)
        self.assertRaises(WrongType, field.validate, {})

    def testValidateRequired(self):
        field = Tuple(title=u'Tuple field', description=u'',
                      readonly=False, required=True)
        field.validate(())
        field.validate((1, 2))
        field.validate((3,))

        self.assertRaises(RequiredMissing, field.validate, None)

    def testValidateMinValues(self):
        field = Tuple(title=u'Tuple field', description=u'',
                      readonly=False, required=False, min_length=2)
        field.validate(None)
        field.validate((1, 2))
        field.validate((1, 2, 3))

        self.assertRaises(TooShort, field.validate, ())
        self.assertRaises(TooShort, field.validate, (1,))

    def testValidateMaxValues(self):
        field = Tuple(title=u'Tuple field', description=u'',
                      readonly=False, required=False, max_length=2)
        field.validate(None)
        field.validate(())
        field.validate((1, 2))

        self.assertRaises(TooLong, field.validate, (1, 2, 3, 4))
        self.assertRaises(TooLong, field.validate, (1, 2, 3))

    def testValidateMinValuesAndMaxValues(self):
        field = Tuple(title=u'Tuple field', description=u'',
                      readonly=False, required=False,
                      min_length=1, max_length=2)
        field.validate(None)
        field.validate((1, ))
        field.validate((1, 2))

        self.assertRaises(TooShort, field.validate, ())
        self.assertRaises(TooLong, field.validate, (1, 2, 3))

    def testValidateValueTypes(self):
        field = Tuple(title=u'Tuple field', description=u'',
                      readonly=False, required=False,
                      value_type=Int())
        field.validate(None)
        field.validate((5,))
        field.validate((2, 3))

        self.assertRaises(WrongContainedType, field.validate, ('',) )
        self.assertRaises(WrongContainedType, field.validate, (3.14159,) )

    def testCorrectValueType(self):
        # allow value_type of None (??? is this OK?)
        Tuple(value_type=None)

        # do not allow arbitrary value types
        self.assertRaises(ValueError, Tuple, value_type=object())
        self.assertRaises(ValueError, Tuple, value_type=Field)

        # however, allow anything that implements IField
        Tuple(value_type=Field())
        class FakeField(object):
            implements(IField)
        Tuple(value_type=FakeField())

    def testUnique(self):
        field = self._Field_Factory(title=u'test field', description=u'',
                                    readonly=False, required=True, unique=True)
        field.validate((1, 2))
        self.assertRaises(NotUnique, field.validate, (1, 2, 1))
    
    def testImplements(self):
        field = Tuple()
        self.failUnless(ITuple.providedBy(field))
        self.failUnless(ISequence.providedBy(field))
        self.failUnless(ICollection.providedBy(field))

def test_suite():
    suite = TestSuite()
    suite.addTest(makeSuite(TupleTest))
    return suite

if __name__ == '__main__':
    main(defaultTest='test_suite')
