tests/test-cbor.py

changegroup: move file matcher from narrow extension

Sparse changegroup generation requires the use of a matcher to
filter which files are relevant.

This commit moves the file matcher from the narrow extension to core
and updates the narrow extension to use it.

I'm not sure why the narrow extension was storing the matcher as
a callable that resolved to a matcher. So I changed it to be a
simple matcher instance.

In addition, code from narrow to intersect the matcher with the local
narrow spec is now performed automatically when the changegroup
packer is created.

If a matcher is not passed into getbundler() an alwaysmatcher() is
assumed. This ensures that a matcher is always defined for all
operations.

Differential Revision: https://phab.mercurial-scm.org/D4011

from __future__ import absolute_import

import io
import unittest

from mercurial.thirdparty import (
    cbor,
)
from mercurial.utils import (
    cborutil,
)

def loadit(it):
    return cbor.loads(b''.join(it))

class BytestringTests(unittest.TestCase):
    def testsimple(self):
        self.assertEqual(
            list(cborutil.streamencode(b'foobar')),
            [b'\x46', b'foobar'])

        self.assertEqual(
            loadit(cborutil.streamencode(b'foobar')),
            b'foobar')

    def testlong(self):
        source = b'x' * 1048576

        self.assertEqual(loadit(cborutil.streamencode(source)), source)

    def testfromiter(self):
        # This is the example from RFC 7049 Section 2.2.2.
        source = [b'\xaa\xbb\xcc\xdd', b'\xee\xff\x99']

        self.assertEqual(
            list(cborutil.streamencodebytestringfromiter(source)),
            [
                b'\x5f',
                b'\x44',
                b'\xaa\xbb\xcc\xdd',
                b'\x43',
                b'\xee\xff\x99',
                b'\xff',
            ])

        self.assertEqual(
            loadit(cborutil.streamencodebytestringfromiter(source)),
            b''.join(source))

    def testfromiterlarge(self):
        source = [b'a' * 16, b'b' * 128, b'c' * 1024, b'd' * 1048576]

        self.assertEqual(
            loadit(cborutil.streamencodebytestringfromiter(source)),
            b''.join(source))

    def testindefinite(self):
        source = b'\x00\x01\x02\x03' + b'\xff' * 16384

        it = cborutil.streamencodeindefinitebytestring(source, chunksize=2)

        self.assertEqual(next(it), b'\x5f')
        self.assertEqual(next(it), b'\x42')
        self.assertEqual(next(it), b'\x00\x01')
        self.assertEqual(next(it), b'\x42')
        self.assertEqual(next(it), b'\x02\x03')
        self.assertEqual(next(it), b'\x42')
        self.assertEqual(next(it), b'\xff\xff')

        dest = b''.join(cborutil.streamencodeindefinitebytestring(
            source, chunksize=42))
        self.assertEqual(cbor.loads(dest), source)

    def testreadtoiter(self):
        source = io.BytesIO(b'\x5f\x44\xaa\xbb\xcc\xdd\x43\xee\xff\x99\xff')

        it = cborutil.readindefinitebytestringtoiter(source)
        self.assertEqual(next(it), b'\xaa\xbb\xcc\xdd')
        self.assertEqual(next(it), b'\xee\xff\x99')

        with self.assertRaises(StopIteration):
            next(it)

class IntTests(unittest.TestCase):
    def testsmall(self):
        self.assertEqual(list(cborutil.streamencode(0)), [b'\x00'])
        self.assertEqual(list(cborutil.streamencode(1)), [b'\x01'])
        self.assertEqual(list(cborutil.streamencode(2)), [b'\x02'])
        self.assertEqual(list(cborutil.streamencode(3)), [b'\x03'])
        self.assertEqual(list(cborutil.streamencode(4)), [b'\x04'])

    def testnegativesmall(self):
        self.assertEqual(list(cborutil.streamencode(-1)), [b'\x20'])
        self.assertEqual(list(cborutil.streamencode(-2)), [b'\x21'])
        self.assertEqual(list(cborutil.streamencode(-3)), [b'\x22'])
        self.assertEqual(list(cborutil.streamencode(-4)), [b'\x23'])
        self.assertEqual(list(cborutil.streamencode(-5)), [b'\x24'])

    def testrange(self):
        for i in range(-70000, 70000, 10):
            self.assertEqual(
                b''.join(cborutil.streamencode(i)),
                cbor.dumps(i))

class ArrayTests(unittest.TestCase):
    def testempty(self):
        self.assertEqual(list(cborutil.streamencode([])), [b'\x80'])
        self.assertEqual(loadit(cborutil.streamencode([])), [])

    def testbasic(self):
        source = [b'foo', b'bar', 1, -10]

        self.assertEqual(list(cborutil.streamencode(source)), [
            b'\x84', b'\x43', b'foo', b'\x43', b'bar', b'\x01', b'\x29'])

    def testemptyfromiter(self):
        self.assertEqual(b''.join(cborutil.streamencodearrayfromiter([])),
                         b'\x9f\xff')

    def testfromiter1(self):
        source = [b'foo']

        self.assertEqual(list(cborutil.streamencodearrayfromiter(source)), [
            b'\x9f',
            b'\x43', b'foo',
            b'\xff',
        ])

        dest = b''.join(cborutil.streamencodearrayfromiter(source))
        self.assertEqual(cbor.loads(dest), source)

    def testtuple(self):
        source = (b'foo', None, 42)

        self.assertEqual(cbor.loads(b''.join(cborutil.streamencode(source))),
                         list(source))

class SetTests(unittest.TestCase):
    def testempty(self):
        self.assertEqual(list(cborutil.streamencode(set())), [
            b'\xd9\x01\x02',
            b'\x80',
        ])

    def testset(self):
        source = {b'foo', None, 42}

        self.assertEqual(cbor.loads(b''.join(cborutil.streamencode(source))),
                         source)

class BoolTests(unittest.TestCase):
    def testbasic(self):
        self.assertEqual(list(cborutil.streamencode(True)),  [b'\xf5'])
        self.assertEqual(list(cborutil.streamencode(False)), [b'\xf4'])

        self.assertIs(loadit(cborutil.streamencode(True)), True)
        self.assertIs(loadit(cborutil.streamencode(False)), False)

class NoneTests(unittest.TestCase):
    def testbasic(self):
        self.assertEqual(list(cborutil.streamencode(None)), [b'\xf6'])

        self.assertIs(loadit(cborutil.streamencode(None)), None)

class MapTests(unittest.TestCase):
    def testempty(self):
        self.assertEqual(list(cborutil.streamencode({})), [b'\xa0'])
        self.assertEqual(loadit(cborutil.streamencode({})), {})

    def testemptyindefinite(self):
        self.assertEqual(list(cborutil.streamencodemapfromiter([])), [
            b'\xbf', b'\xff'])

        self.assertEqual(loadit(cborutil.streamencodemapfromiter([])), {})

    def testone(self):
        source = {b'foo': b'bar'}
        self.assertEqual(list(cborutil.streamencode(source)), [
            b'\xa1', b'\x43', b'foo', b'\x43', b'bar'])

        self.assertEqual(loadit(cborutil.streamencode(source)), source)

    def testmultiple(self):
        source = {
            b'foo': b'bar',
            b'baz': b'value1',
        }

        self.assertEqual(loadit(cborutil.streamencode(source)), source)

        self.assertEqual(
            loadit(cborutil.streamencodemapfromiter(source.items())),
            source)

    def testcomplex(self):
        source = {
            b'key': 1,
            2: -10,
        }

        self.assertEqual(loadit(cborutil.streamencode(source)),
                         source)

        self.assertEqual(
            loadit(cborutil.streamencodemapfromiter(source.items())),
            source)

if __name__ == '__main__':
    import silenttestrunner
    silenttestrunner.main(__name__)