import os

import unittest

import shelve

import glob

from test import test_support

class TestCase(unittest.TestCase):

    fn = "shelftemp" + os.extsep + "db"

    def test_close(self):

        d1 = {}

        s = shelve.Shelf(d1, protocol=2, writeback=False)

        s['key1'] = [1,2,3,4]

        self.assertEqual(s['key1'], [1,2,3,4])

        self.assertEqual(len(s), 1)

        s.close()

        self.assertRaises(ValueError, len, s)

        try:

            s['key1']

        except ValueError:

            pass

        else:

            self.fail('Closed shelf should not find a key')

    def test_ascii_file_shelf(self):

        try:

            s = shelve.open(self.fn, protocol=0)

            s['key1'] = (1,2,3,4)

            self.assertEqual(s['key1'], (1,2,3,4))

            s.close()

        finally:

            for f in glob.glob(self.fn+"*"):

                os.unlink(f)

    def test_binary_file_shelf(self):

        try:

            s = shelve.open(self.fn, protocol=1)

            s['key1'] = (1,2,3,4)

            self.assertEqual(s['key1'], (1,2,3,4))

            s.close()

        finally:

            for f in glob.glob(self.fn+"*"):

                os.unlink(f)

    def test_proto2_file_shelf(self):

        try:

            s = shelve.open(self.fn, protocol=2)

            s['key1'] = (1,2,3,4)

            self.assertEqual(s['key1'], (1,2,3,4))

            s.close()

        finally:

            for f in glob.glob(self.fn+"*"):

                os.unlink(f)

    def test_in_memory_shelf(self):

        d1 = {}

        s = shelve.Shelf(d1, protocol=0)

        s['key1'] = (1,2,3,4)

        self.assertEqual(s['key1'], (1,2,3,4))

        s.close()

        d2 = {}

        s = shelve.Shelf(d2, protocol=1)

        s['key1'] = (1,2,3,4)

        self.assertEqual(s['key1'], (1,2,3,4))

        s.close()

        self.assertEqual(len(d1), 1)

        self.assertNotEqual(d1, d2)

    def test_mutable_entry(self):

        d1 = {}

        s = shelve.Shelf(d1, protocol=2, writeback=False)

        s['key1'] = [1,2,3,4]

        self.assertEqual(s['key1'], [1,2,3,4])

        s['key1'].append(5)

        self.assertEqual(s['key1'], [1,2,3,4])

        s.close()

        d2 = {}

        s = shelve.Shelf(d2, protocol=2, writeback=True)

        s['key1'] = [1,2,3,4]

        self.assertEqual(s['key1'], [1,2,3,4])

        s['key1'].append(5)

        self.assertEqual(s['key1'], [1,2,3,4,5])

        s.close()

        self.assertEqual(len(d1), 1)

        self.assertEqual(len(d2), 1)

from test import mapping_tests

class TestShelveBase(mapping_tests.BasicTestMappingProtocol):

    fn = "shelftemp.db"

    counter = 0

    def __init__(self, *args, **kw):

        self._db = []

        mapping_tests.BasicTestMappingProtocol.__init__(self, *args, **kw)

    type2test = shelve.Shelf

    def _reference(self):

        return {"key1":"value1", "key2":2, "key3":(1,2,3)}

    def _empty_mapping(self):

        if self._in_mem:

            x= shelve.Shelf({}, **self._args)

        else:

            self.counter+=1

            x= shelve.open(self.fn+str(self.counter), **self._args)

        self._db.append(x)

        return x

    def tearDown(self):

        for db in self._db:

            db.close()

        self._db = []

        if not self._in_mem:

            for f in glob.glob(self.fn+"*"):

                test_support.unlink(f)

class TestAsciiFileShelve(TestShelveBase):

    _args={'protocol':0}

    _in_mem = False

class TestBinaryFileShelve(TestShelveBase):

    _args={'protocol':1}

    _in_mem = False

class TestProto2FileShelve(TestShelveBase):

    _args={'protocol':2}

    _in_mem = False

class TestAsciiMemShelve(TestShelveBase):

    _args={'protocol':0}

    _in_mem = True

class TestBinaryMemShelve(TestShelveBase):

    _args={'protocol':1}

    _in_mem = True

class TestProto2MemShelve(TestShelveBase):

    _args={'protocol':2}

    _in_mem = True

def test_main():

    test_support.run_unittest(

        TestAsciiFileShelve,

        TestBinaryFileShelve,

        TestProto2FileShelve,

        TestAsciiMemShelve,

        TestBinaryMemShelve,

        TestProto2MemShelve,

        TestCase

    )

if __name__ == "__main__":

    test_main()