from __future__ import absolute_import

import unittest

try:

    from mercurial import rustext

    rustext.__name__  # trigger immediate actual import

except ImportError:

    rustext = None

else:

    # this would fail already without appropriate ancestor.__package__

    from mercurial.rustext.discovery import (

        PartialDiscovery,

    )

try:

    from mercurial.cext import parsers as cparsers

except ImportError:

    cparsers = None

# picked from test-parse-index2, copied rather than imported

# so that it stays stable even if test-parse-index2 changes or disappears.

data_non_inlined = (

    b'\x00\x00\x00\x01\x00\x00\x00\x00\x00\x01D\x19'

    b'\x00\x07e\x12\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff'

    b'\xff\xff\xff\xff\xd1\xf4\xbb\xb0\xbe\xfc\x13\xbd\x8c\xd3\x9d'

    b'\x0f\xcd\xd9;\x8c\x07\x8cJ/\x00\x00\x00\x00\x00\x00\x00\x00\x00'

    b'\x00\x00\x00\x00\x00\x00\x01D\x19\x00\x00\x00\x00\x00\xdf\x00'

    b'\x00\x01q\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x00\xff'

    b'\xff\xff\xff\xc1\x12\xb9\x04\x96\xa4Z1t\x91\xdfsJ\x90\xf0\x9bh'

    b'\x07l&\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'

    b'\x00\x01D\xf8\x00\x00\x00\x00\x01\x1b\x00\x00\x01\xb8\x00\x00'

    b'\x00\x01\x00\x00\x00\x02\x00\x00\x00\x01\xff\xff\xff\xff\x02\n'

    b'\x0e\xc6&\xa1\x92\xae6\x0b\x02i\xfe-\xe5\xbao\x05\xd1\xe7\x00'

    b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01F'

    b'\x13\x00\x00\x00\x00\x01\xec\x00\x00\x03\x06\x00\x00\x00\x01'

    b'\x00\x00\x00\x03\x00\x00\x00\x02\xff\xff\xff\xff\x12\xcb\xeby1'

    b'\xb6\r\x98B\xcb\x07\xbd`\x8f\x92\xd9\xc4\x84\xbdK\x00\x00\x00'

    b'\x00\x00\x00\x00\x00\x00\x00\x00\x00'

    )

@unittest.skipIf(rustext is None or cparsers is None,

                 "rustext or the C Extension parsers module "

                 "discovery relies on is not available")

class rustdiscoverytest(unittest.TestCase):

    """Test the correctness of binding to Rust code.

    This test is merely for the binding to Rust itself: extraction of

    Python variable, giving back the results etc.

    It is not meant to test the algorithmic correctness of the provided

    methods. Hence the very simple embedded index data is good enough.

    Algorithmic correctness is asserted by the Rust unit tests.

    """

    def parseindex(self):

        return cparsers.parse_index2(data_non_inlined, False)[0]

    def testindex(self):

        idx = self.parseindex()

        # checking our assumptions about the index binary data:

        self.assertEqual({i: (r[5], r[6]) for i, r in enumerate(idx)},

                         {0: (-1, -1),

                          1: (0, -1),

                          2: (1, -1),

                          3: (2, -1)})

    def testaddcommonsmissings(self):

        idx = self.parseindex()

        disco = PartialDiscovery(idx, [3])

        self.assertFalse(disco.hasinfo())

        self.assertFalse(disco.iscomplete())

        disco.addcommons([1])

        self.assertTrue(disco.hasinfo())

        self.assertFalse(disco.iscomplete())

        disco.addmissings([2])

        self.assertTrue(disco.hasinfo())

        self.assertTrue(disco.iscomplete())

        self.assertEqual(disco.commonheads(), {1})

    def testaddmissingsstats(self):

        idx = self.parseindex()

        disco = PartialDiscovery(idx, [3])

        self.assertIsNone(disco.stats()['undecided'], None)

        disco.addmissings([2])

        self.assertEqual(disco.stats()['undecided'], 2)

    def testaddinfocommonfirst(self):

        idx = self.parseindex()

        disco = PartialDiscovery(idx, [3])

        disco.addinfo([(1, True), (2, False)])

        self.assertTrue(disco.hasinfo())

        self.assertTrue(disco.iscomplete())

        self.assertEqual(disco.commonheads(), {1})

    def testaddinfomissingfirst(self):

        idx = self.parseindex()

        disco = PartialDiscovery(idx, [3])

        disco.addinfo([(2, False), (1, True)])

        self.assertTrue(disco.hasinfo())

        self.assertTrue(disco.iscomplete())

        self.assertEqual(disco.commonheads(), {1})

if __name__ == '__main__':

    import silenttestrunner

    silenttestrunner.main(__name__)