templates: add filter to reverse list
The filter supports only lists because for lists, it’s straightforward to
implement. Reversing text doesn’t seem very useful and is hard to implement.
Reversing the bytes would break multi-bytes encodings. Reversing the code
points would break characters consisting of multiple code points. Reversing
graphemes is non-trivial without using a library not included in the standard
library.
import unittest
from mercurial import (
util,
wireprotoframing as framing,
)
ffs = framing.makeframefromhumanstring
class FrameHumanStringTests(unittest.TestCase):
def testbasic(self):
self.assertEqual(
ffs(b'1 1 0 1 0 '), b'\x00\x00\x00\x01\x00\x01\x00\x10'
)
self.assertEqual(
ffs(b'2 4 0 1 0 '), b'\x00\x00\x00\x02\x00\x04\x00\x10'
)
self.assertEqual(
ffs(b'2 4 0 1 0 foo'), b'\x03\x00\x00\x02\x00\x04\x00\x10foo'
)
def testcborint(self):
self.assertEqual(
ffs(b'1 1 0 1 0 cbor:15'), b'\x01\x00\x00\x01\x00\x01\x00\x10\x0f'
)
self.assertEqual(
ffs(b'1 1 0 1 0 cbor:42'), b'\x02\x00\x00\x01\x00\x01\x00\x10\x18*'
)
self.assertEqual(
ffs(b'1 1 0 1 0 cbor:1048576'),
b'\x05\x00\x00\x01\x00\x01\x00\x10\x1a' b'\x00\x10\x00\x00',
)
self.assertEqual(
ffs(b'1 1 0 1 0 cbor:0'), b'\x01\x00\x00\x01\x00\x01\x00\x10\x00'
)
self.assertEqual(
ffs(b'1 1 0 1 0 cbor:-1'), b'\x01\x00\x00\x01\x00\x01\x00\x10 '
)
self.assertEqual(
ffs(b'1 1 0 1 0 cbor:-342542'),
b'\x05\x00\x00\x01\x00\x01\x00\x10:\x00\x05:\r',
)
def testcborstrings(self):
self.assertEqual(
ffs(b"1 1 0 1 0 cbor:b'foo'"),
b'\x04\x00\x00\x01\x00\x01\x00\x10Cfoo',
)
def testcborlists(self):
self.assertEqual(
ffs(b"1 1 0 1 0 cbor:[None, True, False, 42, b'foo']"),
b'\n\x00\x00\x01\x00\x01\x00\x10\x85\xf6\xf5\xf4' b'\x18*Cfoo',
)
def testcbordicts(self):
self.assertEqual(
ffs(b"1 1 0 1 0 " b"cbor:{b'foo': b'val1', b'bar': b'val2'}"),
b'\x13\x00\x00\x01\x00\x01\x00\x10\xa2' b'CbarDval2CfooDval1',
)
class FrameTests(unittest.TestCase):
def testdataexactframesize(self):
data = util.bytesio(b'x' * framing.DEFAULT_MAX_FRAME_SIZE)
stream = framing.stream(1)
frames = list(
framing.createcommandframes(stream, 1, b'command', {}, data)
)
self.assertEqual(
frames,
[
ffs(
b'1 1 stream-begin command-request new|have-data '
b"cbor:{b'name': b'command'}"
),
ffs(b'1 1 0 command-data continuation %s' % data.getvalue()),
ffs(b'1 1 0 command-data eos '),
],
)
def testdatamultipleframes(self):
data = util.bytesio(b'x' * (framing.DEFAULT_MAX_FRAME_SIZE + 1))
stream = framing.stream(1)
frames = list(
framing.createcommandframes(stream, 1, b'command', {}, data)
)
self.assertEqual(
frames,
[
ffs(
b'1 1 stream-begin command-request new|have-data '
b"cbor:{b'name': b'command'}"
),
ffs(
b'1 1 0 command-data continuation %s'
% (b'x' * framing.DEFAULT_MAX_FRAME_SIZE)
),
ffs(b'1 1 0 command-data eos x'),
],
)
def testargsanddata(self):
data = util.bytesio(b'x' * 100)
stream = framing.stream(1)
frames = list(
framing.createcommandframes(
stream,
1,
b'command',
{
b'key1': b'key1value',
b'key2': b'key2value',
b'key3': b'key3value',
},
data,
)
)
self.assertEqual(
frames,
[
ffs(
b'1 1 stream-begin command-request new|have-data '
b"cbor:{b'name': b'command', b'args': {b'key1': b'key1value', "
b"b'key2': b'key2value', b'key3': b'key3value'}}"
),
ffs(b'1 1 0 command-data eos %s' % data.getvalue()),
],
)
if not getattr(unittest.TestCase, 'assertRaisesRegex', False):
# Python 3.7 deprecates the regex*p* version, but 2.7 lacks
# the regex version.
assertRaisesRegex = ( # camelcase-required
unittest.TestCase.assertRaisesRegexp
)
def testtextoutputformattingstringtype(self):
"""Formatting string must be bytes."""
with self.assertRaisesRegex(ValueError, 'must use bytes formatting '):
list(
framing.createtextoutputframe(
None, 1, [(b'foo'.decode('ascii'), [], [])]
)
)
def testtextoutputargumentbytes(self):
with self.assertRaisesRegex(ValueError, 'must use bytes for argument'):
list(
framing.createtextoutputframe(
None, 1, [(b'foo', [b'foo'.decode('ascii')], [])]
)
)
def testtextoutputlabelbytes(self):
with self.assertRaisesRegex(ValueError, 'must use bytes for labels'):
list(
framing.createtextoutputframe(
None, 1, [(b'foo', [], [b'foo'.decode('ascii')])]
)
)
def testtextoutput1simpleatom(self):
stream = framing.stream(1)
val = list(framing.createtextoutputframe(stream, 1, [(b'foo', [], [])]))
self.assertEqual(
val,
[
ffs(
b'1 1 stream-begin text-output 0 '
b"cbor:[{b'msg': b'foo'}]"
),
],
)
def testtextoutput2simpleatoms(self):
stream = framing.stream(1)
val = list(
framing.createtextoutputframe(
stream,
1,
[
(b'foo', [], []),
(b'bar', [], []),
],
)
)
self.assertEqual(
val,
[
ffs(
b'1 1 stream-begin text-output 0 '
b"cbor:[{b'msg': b'foo'}, {b'msg': b'bar'}]"
)
],
)
def testtextoutput1arg(self):
stream = framing.stream(1)
val = list(
framing.createtextoutputframe(
stream,
1,
[
(b'foo %s', [b'val1'], []),
],
)
)
self.assertEqual(
val,
[
ffs(
b'1 1 stream-begin text-output 0 '
b"cbor:[{b'msg': b'foo %s', b'args': [b'val1']}]"
)
],
)
def testtextoutput2arg(self):
stream = framing.stream(1)
val = list(
framing.createtextoutputframe(
stream,
1,
[
(b'foo %s %s', [b'val', b'value'], []),
],
)
)
self.assertEqual(
val,
[
ffs(
b'1 1 stream-begin text-output 0 '
b"cbor:[{b'msg': b'foo %s %s', b'args': [b'val', b'value']}]"
)
],
)
def testtextoutput1label(self):
stream = framing.stream(1)
val = list(
framing.createtextoutputframe(
stream,
1,
[
(b'foo', [], [b'label']),
],
)
)
self.assertEqual(
val,
[
ffs(
b'1 1 stream-begin text-output 0 '
b"cbor:[{b'msg': b'foo', b'labels': [b'label']}]"
)
],
)
def testargandlabel(self):
stream = framing.stream(1)
val = list(
framing.createtextoutputframe(
stream,
1,
[
(b'foo %s', [b'arg'], [b'label']),
],
)
)
self.assertEqual(
val,
[
ffs(
b'1 1 stream-begin text-output 0 '
b"cbor:[{b'msg': b'foo %s', b'args': [b'arg'], "
b"b'labels': [b'label']}]"
)
],
)
if __name__ == '__main__':
import silenttestrunner
silenttestrunner.main(__name__)