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Copy pathtest_argparse.py
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5578 lines (4506 loc) · 182 KB
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# Author: Steven J. Bethard <steven.bethard@gmail.com>.
import inspect
import io
import operator
import os
import shutil
import stat
import sys
import textwrap
import tempfile
import unittest
import argparse
import warnings
from test.support import os_helper
from unittest import mock
class StdIOBuffer(io.TextIOWrapper):
'''Replacement for writable io.StringIO that behaves more like real file
Unlike StringIO, provides a buffer attribute that holds the underlying
binary data, allowing it to replace sys.stdout/sys.stderr in more
contexts.
'''
def __init__(self, initial_value='', newline='\n'):
initial_value = initial_value.encode('utf-8')
super().__init__(io.BufferedWriter(io.BytesIO(initial_value)),
'utf-8', newline=newline)
def getvalue(self):
self.flush()
return self.buffer.raw.getvalue().decode('utf-8')
class TestCase(unittest.TestCase):
def setUp(self):
# The tests assume that line wrapping occurs at 80 columns, but this
# behaviour can be overridden by setting the COLUMNS environment
# variable. To ensure that this width is used, set COLUMNS to 80.
env = self.enterContext(os_helper.EnvironmentVarGuard())
env['COLUMNS'] = '80'
@os_helper.skip_unless_working_chmod
class TempDirMixin(object):
def setUp(self):
self.temp_dir = tempfile.mkdtemp()
self.old_dir = os.getcwd()
os.chdir(self.temp_dir)
def tearDown(self):
os.chdir(self.old_dir)
for root, dirs, files in os.walk(self.temp_dir, topdown=False):
for name in files:
os.chmod(os.path.join(self.temp_dir, name), stat.S_IWRITE)
shutil.rmtree(self.temp_dir, True)
def create_writable_file(self, filename):
file_path = os.path.join(self.temp_dir, filename)
with open(file_path, 'w', encoding="utf-8") as file:
file.write(filename)
return file_path
def create_readonly_file(self, filename):
os.chmod(self.create_writable_file(filename), stat.S_IREAD)
class Sig(object):
def __init__(self, *args, **kwargs):
self.args = args
self.kwargs = kwargs
class NS(object):
def __init__(self, **kwargs):
self.__dict__.update(kwargs)
def __repr__(self):
sorted_items = sorted(self.__dict__.items())
kwarg_str = ', '.join(['%s=%r' % tup for tup in sorted_items])
return '%s(%s)' % (type(self).__name__, kwarg_str)
def __eq__(self, other):
return vars(self) == vars(other)
class ArgumentParserError(Exception):
def __init__(self, message, stdout=None, stderr=None, error_code=None):
Exception.__init__(self, message, stdout, stderr)
self.message = message
self.stdout = stdout
self.stderr = stderr
self.error_code = error_code
def stderr_to_parser_error(parse_args, *args, **kwargs):
# if this is being called recursively and stderr or stdout is already being
# redirected, simply call the function and let the enclosing function
# catch the exception
if isinstance(sys.stderr, StdIOBuffer) or isinstance(sys.stdout, StdIOBuffer):
return parse_args(*args, **kwargs)
# if this is not being called recursively, redirect stderr and
# use it as the ArgumentParserError message
old_stdout = sys.stdout
old_stderr = sys.stderr
sys.stdout = StdIOBuffer()
sys.stderr = StdIOBuffer()
try:
try:
result = parse_args(*args, **kwargs)
for key in list(vars(result)):
attr = getattr(result, key)
if attr is sys.stdout:
setattr(result, key, old_stdout)
elif attr is sys.stdout.buffer:
setattr(result, key, getattr(old_stdout, 'buffer', BIN_STDOUT_SENTINEL))
elif attr is sys.stderr:
setattr(result, key, old_stderr)
elif attr is sys.stderr.buffer:
setattr(result, key, getattr(old_stderr, 'buffer', BIN_STDERR_SENTINEL))
return result
except SystemExit as e:
code = e.code
stdout = sys.stdout.getvalue()
stderr = sys.stderr.getvalue()
raise ArgumentParserError(
"SystemExit", stdout, stderr, code) from None
finally:
sys.stdout = old_stdout
sys.stderr = old_stderr
class ErrorRaisingArgumentParser(argparse.ArgumentParser):
def parse_args(self, *args, **kwargs):
parse_args = super(ErrorRaisingArgumentParser, self).parse_args
return stderr_to_parser_error(parse_args, *args, **kwargs)
def exit(self, *args, **kwargs):
exit = super(ErrorRaisingArgumentParser, self).exit
return stderr_to_parser_error(exit, *args, **kwargs)
def error(self, *args, **kwargs):
error = super(ErrorRaisingArgumentParser, self).error
return stderr_to_parser_error(error, *args, **kwargs)
class ParserTesterMetaclass(type):
"""Adds parser tests using the class attributes.
Classes of this type should specify the following attributes:
argument_signatures -- a list of Sig objects which specify
the signatures of Argument objects to be created
failures -- a list of args lists that should cause the parser
to fail
successes -- a list of (initial_args, options, remaining_args) tuples
where initial_args specifies the string args to be parsed,
options is a dict that should match the vars() of the options
parsed out of initial_args, and remaining_args should be any
remaining unparsed arguments
"""
def __init__(cls, name, bases, bodydict):
if name == 'ParserTestCase':
return
# default parser signature is empty
if not hasattr(cls, 'parser_signature'):
cls.parser_signature = Sig()
if not hasattr(cls, 'parser_class'):
cls.parser_class = ErrorRaisingArgumentParser
# ---------------------------------------
# functions for adding optional arguments
# ---------------------------------------
def no_groups(parser, argument_signatures):
"""Add all arguments directly to the parser"""
for sig in argument_signatures:
parser.add_argument(*sig.args, **sig.kwargs)
def one_group(parser, argument_signatures):
"""Add all arguments under a single group in the parser"""
group = parser.add_argument_group('foo')
for sig in argument_signatures:
group.add_argument(*sig.args, **sig.kwargs)
def many_groups(parser, argument_signatures):
"""Add each argument in its own group to the parser"""
for i, sig in enumerate(argument_signatures):
group = parser.add_argument_group('foo:%i' % i)
group.add_argument(*sig.args, **sig.kwargs)
# --------------------------
# functions for parsing args
# --------------------------
def listargs(parser, args):
"""Parse the args by passing in a list"""
return parser.parse_args(args)
def sysargs(parser, args):
"""Parse the args by defaulting to sys.argv"""
old_sys_argv = sys.argv
sys.argv = [old_sys_argv[0]] + args
try:
return parser.parse_args()
finally:
sys.argv = old_sys_argv
# class that holds the combination of one optional argument
# addition method and one arg parsing method
class AddTests(object):
def __init__(self, tester_cls, add_arguments, parse_args):
self._add_arguments = add_arguments
self._parse_args = parse_args
add_arguments_name = self._add_arguments.__name__
parse_args_name = self._parse_args.__name__
for test_func in [self.test_failures, self.test_successes]:
func_name = test_func.__name__
names = func_name, add_arguments_name, parse_args_name
test_name = '_'.join(names)
def wrapper(self, test_func=test_func):
test_func(self)
try:
wrapper.__name__ = test_name
except TypeError:
pass
setattr(tester_cls, test_name, wrapper)
def _get_parser(self, tester):
args = tester.parser_signature.args
kwargs = tester.parser_signature.kwargs
parser = tester.parser_class(*args, **kwargs)
self._add_arguments(parser, tester.argument_signatures)
return parser
def test_failures(self, tester):
parser = self._get_parser(tester)
for args_str in tester.failures:
args = args_str.split()
with tester.assertRaises(ArgumentParserError, msg=args):
parser.parse_args(args)
def test_successes(self, tester):
parser = self._get_parser(tester)
for args, expected_ns in tester.successes:
if isinstance(args, str):
args = args.split()
result_ns = self._parse_args(parser, args)
tester.assertEqual(expected_ns, result_ns)
# add tests for each combination of an optionals adding method
# and an arg parsing method
for add_arguments in [no_groups, one_group, many_groups]:
for parse_args in [listargs, sysargs]:
AddTests(cls, add_arguments, parse_args)
bases = TestCase,
ParserTestCase = ParserTesterMetaclass('ParserTestCase', bases, {})
# ===============
# Optionals tests
# ===============
class TestOptionalsSingleDash(ParserTestCase):
"""Test an Optional with a single-dash option string"""
argument_signatures = [Sig('-x')]
failures = ['-x', 'a', '--foo', '-x --foo', '-x -y']
successes = [
('', NS(x=None)),
('-x a', NS(x='a')),
('-xa', NS(x='a')),
('-x -1', NS(x='-1')),
('-x-1', NS(x='-1')),
]
class TestOptionalsSingleDashCombined(ParserTestCase):
"""Test an Optional with a single-dash option string"""
argument_signatures = [
Sig('-x', action='store_true'),
Sig('-yyy', action='store_const', const=42),
Sig('-z'),
]
failures = ['a', '--foo', '-xa', '-x --foo', '-x -z', '-z -x',
'-yx', '-yz a', '-yyyx', '-yyyza', '-xyza']
successes = [
('', NS(x=False, yyy=None, z=None)),
('-x', NS(x=True, yyy=None, z=None)),
('-za', NS(x=False, yyy=None, z='a')),
('-z a', NS(x=False, yyy=None, z='a')),
('-xza', NS(x=True, yyy=None, z='a')),
('-xz a', NS(x=True, yyy=None, z='a')),
('-x -za', NS(x=True, yyy=None, z='a')),
('-x -z a', NS(x=True, yyy=None, z='a')),
('-y', NS(x=False, yyy=42, z=None)),
('-yyy', NS(x=False, yyy=42, z=None)),
('-x -yyy -za', NS(x=True, yyy=42, z='a')),
('-x -yyy -z a', NS(x=True, yyy=42, z='a')),
]
class TestOptionalsSingleDashLong(ParserTestCase):
"""Test an Optional with a multi-character single-dash option string"""
argument_signatures = [Sig('-foo')]
failures = ['-foo', 'a', '--foo', '-foo --foo', '-foo -y', '-fooa']
successes = [
('', NS(foo=None)),
('-foo a', NS(foo='a')),
('-foo -1', NS(foo='-1')),
('-fo a', NS(foo='a')),
('-f a', NS(foo='a')),
]
class TestOptionalsSingleDashSubsetAmbiguous(ParserTestCase):
"""Test Optionals where option strings are subsets of each other"""
argument_signatures = [Sig('-f'), Sig('-foobar'), Sig('-foorab')]
failures = ['-f', '-foo', '-fo', '-foo b', '-foob', '-fooba', '-foora']
successes = [
('', NS(f=None, foobar=None, foorab=None)),
('-f a', NS(f='a', foobar=None, foorab=None)),
('-fa', NS(f='a', foobar=None, foorab=None)),
('-foa', NS(f='oa', foobar=None, foorab=None)),
('-fooa', NS(f='ooa', foobar=None, foorab=None)),
('-foobar a', NS(f=None, foobar='a', foorab=None)),
('-foorab a', NS(f=None, foobar=None, foorab='a')),
]
class TestOptionalsSingleDashAmbiguous(ParserTestCase):
"""Test Optionals that partially match but are not subsets"""
argument_signatures = [Sig('-foobar'), Sig('-foorab')]
failures = ['-f', '-f a', '-fa', '-foa', '-foo', '-fo', '-foo b']
successes = [
('', NS(foobar=None, foorab=None)),
('-foob a', NS(foobar='a', foorab=None)),
('-foor a', NS(foobar=None, foorab='a')),
('-fooba a', NS(foobar='a', foorab=None)),
('-foora a', NS(foobar=None, foorab='a')),
('-foobar a', NS(foobar='a', foorab=None)),
('-foorab a', NS(foobar=None, foorab='a')),
]
class TestOptionalsNumeric(ParserTestCase):
"""Test an Optional with a short opt string"""
argument_signatures = [Sig('-1', dest='one')]
failures = ['-1', 'a', '-1 --foo', '-1 -y', '-1 -1', '-1 -2']
successes = [
('', NS(one=None)),
('-1 a', NS(one='a')),
('-1a', NS(one='a')),
('-1-2', NS(one='-2')),
]
class TestOptionalsDoubleDash(ParserTestCase):
"""Test an Optional with a double-dash option string"""
argument_signatures = [Sig('--foo')]
failures = ['--foo', '-f', '-f a', 'a', '--foo -x', '--foo --bar']
successes = [
('', NS(foo=None)),
('--foo a', NS(foo='a')),
('--foo=a', NS(foo='a')),
('--foo -2.5', NS(foo='-2.5')),
('--foo=-2.5', NS(foo='-2.5')),
]
class TestOptionalsDoubleDashPartialMatch(ParserTestCase):
"""Tests partial matching with a double-dash option string"""
argument_signatures = [
Sig('--badger', action='store_true'),
Sig('--bat'),
]
failures = ['--bar', '--b', '--ba', '--b=2', '--ba=4', '--badge 5']
successes = [
('', NS(badger=False, bat=None)),
('--bat X', NS(badger=False, bat='X')),
('--bad', NS(badger=True, bat=None)),
('--badg', NS(badger=True, bat=None)),
('--badge', NS(badger=True, bat=None)),
('--badger', NS(badger=True, bat=None)),
]
class TestOptionalsDoubleDashPrefixMatch(ParserTestCase):
"""Tests when one double-dash option string is a prefix of another"""
argument_signatures = [
Sig('--badger', action='store_true'),
Sig('--ba'),
]
failures = ['--bar', '--b', '--ba', '--b=2', '--badge 5']
successes = [
('', NS(badger=False, ba=None)),
('--ba X', NS(badger=False, ba='X')),
('--ba=X', NS(badger=False, ba='X')),
('--bad', NS(badger=True, ba=None)),
('--badg', NS(badger=True, ba=None)),
('--badge', NS(badger=True, ba=None)),
('--badger', NS(badger=True, ba=None)),
]
class TestOptionalsSingleDoubleDash(ParserTestCase):
"""Test an Optional with single- and double-dash option strings"""
argument_signatures = [
Sig('-f', action='store_true'),
Sig('--bar'),
Sig('-baz', action='store_const', const=42),
]
failures = ['--bar', '-fbar', '-fbaz', '-bazf', '-b B', 'B']
successes = [
('', NS(f=False, bar=None, baz=None)),
('-f', NS(f=True, bar=None, baz=None)),
('--ba B', NS(f=False, bar='B', baz=None)),
('-f --bar B', NS(f=True, bar='B', baz=None)),
('-f -b', NS(f=True, bar=None, baz=42)),
('-ba -f', NS(f=True, bar=None, baz=42)),
]
class TestOptionalsAlternatePrefixChars(ParserTestCase):
"""Test an Optional with option strings with custom prefixes"""
parser_signature = Sig(prefix_chars='+:/', add_help=False)
argument_signatures = [
Sig('+f', action='store_true'),
Sig('::bar'),
Sig('/baz', action='store_const', const=42),
]
failures = ['--bar', '-fbar', '-b B', 'B', '-f', '--bar B', '-baz', '-h', '--help', '+h', '::help', '/help']
successes = [
('', NS(f=False, bar=None, baz=None)),
('+f', NS(f=True, bar=None, baz=None)),
('::ba B', NS(f=False, bar='B', baz=None)),
('+f ::bar B', NS(f=True, bar='B', baz=None)),
('+f /b', NS(f=True, bar=None, baz=42)),
('/ba +f', NS(f=True, bar=None, baz=42)),
]
class TestOptionalsAlternatePrefixCharsAddedHelp(ParserTestCase):
"""When ``-`` not in prefix_chars, default operators created for help
should use the prefix_chars in use rather than - or --
http://bugs.python.org/issue9444"""
parser_signature = Sig(prefix_chars='+:/', add_help=True)
argument_signatures = [
Sig('+f', action='store_true'),
Sig('::bar'),
Sig('/baz', action='store_const', const=42),
]
failures = ['--bar', '-fbar', '-b B', 'B', '-f', '--bar B', '-baz']
successes = [
('', NS(f=False, bar=None, baz=None)),
('+f', NS(f=True, bar=None, baz=None)),
('::ba B', NS(f=False, bar='B', baz=None)),
('+f ::bar B', NS(f=True, bar='B', baz=None)),
('+f /b', NS(f=True, bar=None, baz=42)),
('/ba +f', NS(f=True, bar=None, baz=42))
]
class TestOptionalsAlternatePrefixCharsMultipleShortArgs(ParserTestCase):
"""Verify that Optionals must be called with their defined prefixes"""
parser_signature = Sig(prefix_chars='+-', add_help=False)
argument_signatures = [
Sig('-x', action='store_true'),
Sig('+y', action='store_true'),
Sig('+z', action='store_true'),
]
failures = ['-w',
'-xyz',
'+x',
'-y',
'+xyz',
]
successes = [
('', NS(x=False, y=False, z=False)),
('-x', NS(x=True, y=False, z=False)),
('+y -x', NS(x=True, y=True, z=False)),
('+yz -x', NS(x=True, y=True, z=True)),
]
class TestOptionalsShortLong(ParserTestCase):
"""Test a combination of single- and double-dash option strings"""
argument_signatures = [
Sig('-v', '--verbose', '-n', '--noisy', action='store_true'),
]
failures = ['--x --verbose', '-N', 'a', '-v x']
successes = [
('', NS(verbose=False)),
('-v', NS(verbose=True)),
('--verbose', NS(verbose=True)),
('-n', NS(verbose=True)),
('--noisy', NS(verbose=True)),
]
class TestOptionalsDest(ParserTestCase):
"""Tests various means of setting destination"""
argument_signatures = [Sig('--foo-bar'), Sig('--baz', dest='zabbaz')]
failures = ['a']
successes = [
('--foo-bar f', NS(foo_bar='f', zabbaz=None)),
('--baz g', NS(foo_bar=None, zabbaz='g')),
('--foo-bar h --baz i', NS(foo_bar='h', zabbaz='i')),
('--baz j --foo-bar k', NS(foo_bar='k', zabbaz='j')),
]
class TestOptionalsDefault(ParserTestCase):
"""Tests specifying a default for an Optional"""
argument_signatures = [Sig('-x'), Sig('-y', default=42)]
failures = ['a']
successes = [
('', NS(x=None, y=42)),
('-xx', NS(x='x', y=42)),
('-yy', NS(x=None, y='y')),
]
class TestOptionalsNargsDefault(ParserTestCase):
"""Tests not specifying the number of args for an Optional"""
argument_signatures = [Sig('-x')]
failures = ['a', '-x']
successes = [
('', NS(x=None)),
('-x a', NS(x='a')),
]
class TestOptionalsNargs1(ParserTestCase):
"""Tests specifying 1 arg for an Optional"""
argument_signatures = [Sig('-x', nargs=1)]
failures = ['a', '-x']
successes = [
('', NS(x=None)),
('-x a', NS(x=['a'])),
]
class TestOptionalsNargs3(ParserTestCase):
"""Tests specifying 3 args for an Optional"""
argument_signatures = [Sig('-x', nargs=3)]
failures = ['a', '-x', '-x a', '-x a b', 'a -x', 'a -x b']
successes = [
('', NS(x=None)),
('-x a b c', NS(x=['a', 'b', 'c'])),
]
class TestOptionalsNargsOptional(ParserTestCase):
"""Tests specifying an Optional arg for an Optional"""
argument_signatures = [
Sig('-w', nargs='?'),
Sig('-x', nargs='?', const=42),
Sig('-y', nargs='?', default='spam'),
Sig('-z', nargs='?', type=int, const='42', default='84'),
]
failures = ['2']
successes = [
('', NS(w=None, x=None, y='spam', z=84)),
('-w', NS(w=None, x=None, y='spam', z=84)),
('-w 2', NS(w='2', x=None, y='spam', z=84)),
('-x', NS(w=None, x=42, y='spam', z=84)),
('-x 2', NS(w=None, x='2', y='spam', z=84)),
('-y', NS(w=None, x=None, y=None, z=84)),
('-y 2', NS(w=None, x=None, y='2', z=84)),
('-z', NS(w=None, x=None, y='spam', z=42)),
('-z 2', NS(w=None, x=None, y='spam', z=2)),
]
class TestOptionalsNargsZeroOrMore(ParserTestCase):
"""Tests specifying args for an Optional that accepts zero or more"""
argument_signatures = [
Sig('-x', nargs='*'),
Sig('-y', nargs='*', default='spam'),
]
failures = ['a']
successes = [
('', NS(x=None, y='spam')),
('-x', NS(x=[], y='spam')),
('-x a', NS(x=['a'], y='spam')),
('-x a b', NS(x=['a', 'b'], y='spam')),
('-y', NS(x=None, y=[])),
('-y a', NS(x=None, y=['a'])),
('-y a b', NS(x=None, y=['a', 'b'])),
]
class TestOptionalsNargsOneOrMore(ParserTestCase):
"""Tests specifying args for an Optional that accepts one or more"""
argument_signatures = [
Sig('-x', nargs='+'),
Sig('-y', nargs='+', default='spam'),
]
failures = ['a', '-x', '-y', 'a -x', 'a -y b']
successes = [
('', NS(x=None, y='spam')),
('-x a', NS(x=['a'], y='spam')),
('-x a b', NS(x=['a', 'b'], y='spam')),
('-y a', NS(x=None, y=['a'])),
('-y a b', NS(x=None, y=['a', 'b'])),
]
class TestOptionalsChoices(ParserTestCase):
"""Tests specifying the choices for an Optional"""
argument_signatures = [
Sig('-f', choices='abc'),
Sig('-g', type=int, choices=range(5))]
failures = ['a', '-f d', '-fad', '-ga', '-g 6']
successes = [
('', NS(f=None, g=None)),
('-f a', NS(f='a', g=None)),
('-f c', NS(f='c', g=None)),
('-g 0', NS(f=None, g=0)),
('-g 03', NS(f=None, g=3)),
('-fb -g4', NS(f='b', g=4)),
]
class TestOptionalsRequired(ParserTestCase):
"""Tests an optional action that is required"""
argument_signatures = [
Sig('-x', type=int, required=True),
]
failures = ['a', '']
successes = [
('-x 1', NS(x=1)),
('-x42', NS(x=42)),
]
class TestOptionalsActionStore(ParserTestCase):
"""Tests the store action for an Optional"""
argument_signatures = [Sig('-x', action='store')]
failures = ['a', 'a -x']
successes = [
('', NS(x=None)),
('-xfoo', NS(x='foo')),
]
class TestOptionalsActionStoreConst(ParserTestCase):
"""Tests the store_const action for an Optional"""
argument_signatures = [Sig('-y', action='store_const', const=object)]
failures = ['a']
successes = [
('', NS(y=None)),
('-y', NS(y=object)),
]
class TestOptionalsActionStoreFalse(ParserTestCase):
"""Tests the store_false action for an Optional"""
argument_signatures = [Sig('-z', action='store_false')]
failures = ['a', '-za', '-z a']
successes = [
('', NS(z=True)),
('-z', NS(z=False)),
]
class TestOptionalsActionStoreTrue(ParserTestCase):
"""Tests the store_true action for an Optional"""
argument_signatures = [Sig('--apple', action='store_true')]
failures = ['a', '--apple=b', '--apple b']
successes = [
('', NS(apple=False)),
('--apple', NS(apple=True)),
]
class TestBooleanOptionalAction(ParserTestCase):
"""Tests BooleanOptionalAction"""
argument_signatures = [Sig('--foo', action=argparse.BooleanOptionalAction)]
failures = ['--foo bar', '--foo=bar']
successes = [
('', NS(foo=None)),
('--foo', NS(foo=True)),
('--no-foo', NS(foo=False)),
('--foo --no-foo', NS(foo=False)), # useful for aliases
('--no-foo --foo', NS(foo=True)),
]
def test_const(self):
# See bpo-40862
parser = argparse.ArgumentParser()
with self.assertRaises(TypeError) as cm:
parser.add_argument('--foo', const=True, action=argparse.BooleanOptionalAction)
self.assertIn("got an unexpected keyword argument 'const'", str(cm.exception))
class TestBooleanOptionalActionRequired(ParserTestCase):
"""Tests BooleanOptionalAction required"""
argument_signatures = [
Sig('--foo', required=True, action=argparse.BooleanOptionalAction)
]
failures = ['']
successes = [
('--foo', NS(foo=True)),
('--no-foo', NS(foo=False)),
]
class TestOptionalsActionAppend(ParserTestCase):
"""Tests the append action for an Optional"""
argument_signatures = [Sig('--baz', action='append')]
failures = ['a', '--baz', 'a --baz', '--baz a b']
successes = [
('', NS(baz=None)),
('--baz a', NS(baz=['a'])),
('--baz a --baz b', NS(baz=['a', 'b'])),
]
class TestOptionalsActionAppendWithDefault(ParserTestCase):
"""Tests the append action for an Optional"""
argument_signatures = [Sig('--baz', action='append', default=['X'])]
failures = ['a', '--baz', 'a --baz', '--baz a b']
successes = [
('', NS(baz=['X'])),
('--baz a', NS(baz=['X', 'a'])),
('--baz a --baz b', NS(baz=['X', 'a', 'b'])),
]
class TestConstActionsMissingConstKwarg(ParserTestCase):
"""Tests that const gets default value of None when not provided"""
argument_signatures = [
Sig('-f', action='append_const'),
Sig('--foo', action='append_const'),
Sig('-b', action='store_const'),
Sig('--bar', action='store_const')
]
failures = ['-f v', '--foo=bar', '--foo bar']
successes = [
('', NS(f=None, foo=None, b=None, bar=None)),
('-f', NS(f=[None], foo=None, b=None, bar=None)),
('--foo', NS(f=None, foo=[None], b=None, bar=None)),
('-b', NS(f=None, foo=None, b=None, bar=None)),
('--bar', NS(f=None, foo=None, b=None, bar=None)),
]
class TestOptionalsActionAppendConst(ParserTestCase):
"""Tests the append_const action for an Optional"""
argument_signatures = [
Sig('-b', action='append_const', const=Exception),
Sig('-c', action='append', dest='b'),
]
failures = ['a', '-c', 'a -c', '-bx', '-b x']
successes = [
('', NS(b=None)),
('-b', NS(b=[Exception])),
('-b -cx -b -cyz', NS(b=[Exception, 'x', Exception, 'yz'])),
]
class TestOptionalsActionAppendConstWithDefault(ParserTestCase):
"""Tests the append_const action for an Optional"""
argument_signatures = [
Sig('-b', action='append_const', const=Exception, default=['X']),
Sig('-c', action='append', dest='b'),
]
failures = ['a', '-c', 'a -c', '-bx', '-b x']
successes = [
('', NS(b=['X'])),
('-b', NS(b=['X', Exception])),
('-b -cx -b -cyz', NS(b=['X', Exception, 'x', Exception, 'yz'])),
]
class TestOptionalsActionCount(ParserTestCase):
"""Tests the count action for an Optional"""
argument_signatures = [Sig('-x', action='count')]
failures = ['a', '-x a', '-x b', '-x a -x b']
successes = [
('', NS(x=None)),
('-x', NS(x=1)),
]
class TestOptionalsAllowLongAbbreviation(ParserTestCase):
"""Allow long options to be abbreviated unambiguously"""
argument_signatures = [
Sig('--foo'),
Sig('--foobaz'),
Sig('--fooble', action='store_true'),
]
failures = ['--foob 5', '--foob']
successes = [
('', NS(foo=None, foobaz=None, fooble=False)),
('--foo 7', NS(foo='7', foobaz=None, fooble=False)),
('--fooba a', NS(foo=None, foobaz='a', fooble=False)),
('--foobl --foo g', NS(foo='g', foobaz=None, fooble=True)),
]
class TestOptionalsDisallowLongAbbreviation(ParserTestCase):
"""Do not allow abbreviations of long options at all"""
parser_signature = Sig(allow_abbrev=False)
argument_signatures = [
Sig('--foo'),
Sig('--foodle', action='store_true'),
Sig('--foonly'),
]
failures = ['-foon 3', '--foon 3', '--food', '--food --foo 2']
successes = [
('', NS(foo=None, foodle=False, foonly=None)),
('--foo 3', NS(foo='3', foodle=False, foonly=None)),
('--foonly 7 --foodle --foo 2', NS(foo='2', foodle=True, foonly='7')),
]
class TestOptionalsDisallowLongAbbreviationPrefixChars(ParserTestCase):
"""Disallowing abbreviations works with alternative prefix characters"""
parser_signature = Sig(prefix_chars='+', allow_abbrev=False)
argument_signatures = [
Sig('++foo'),
Sig('++foodle', action='store_true'),
Sig('++foonly'),
]
failures = ['+foon 3', '++foon 3', '++food', '++food ++foo 2']
successes = [
('', NS(foo=None, foodle=False, foonly=None)),
('++foo 3', NS(foo='3', foodle=False, foonly=None)),
('++foonly 7 ++foodle ++foo 2', NS(foo='2', foodle=True, foonly='7')),
]
class TestDisallowLongAbbreviationAllowsShortGrouping(ParserTestCase):
"""Do not allow abbreviations of long options at all"""
parser_signature = Sig(allow_abbrev=False)
argument_signatures = [
Sig('-r'),
Sig('-c', action='count'),
]
failures = ['-r', '-c -r']
successes = [
('', NS(r=None, c=None)),
('-ra', NS(r='a', c=None)),
('-rcc', NS(r='cc', c=None)),
('-cc', NS(r=None, c=2)),
('-cc -ra', NS(r='a', c=2)),
('-ccrcc', NS(r='cc', c=2)),
]
class TestDisallowLongAbbreviationAllowsShortGroupingPrefix(ParserTestCase):
"""Short option grouping works with custom prefix and allow_abbrev=False"""
parser_signature = Sig(prefix_chars='+', allow_abbrev=False)
argument_signatures = [
Sig('+r'),
Sig('+c', action='count'),
]
failures = ['+r', '+c +r']
successes = [
('', NS(r=None, c=None)),
('+ra', NS(r='a', c=None)),
('+rcc', NS(r='cc', c=None)),
('+cc', NS(r=None, c=2)),
('+cc +ra', NS(r='a', c=2)),
('+ccrcc', NS(r='cc', c=2)),
]
# ================
# Positional tests
# ================
class TestPositionalsNargsNone(ParserTestCase):
"""Test a Positional that doesn't specify nargs"""
argument_signatures = [Sig('foo')]
failures = ['', '-x', 'a b']
successes = [
('a', NS(foo='a')),
]
class TestPositionalsNargs1(ParserTestCase):
"""Test a Positional that specifies an nargs of 1"""
argument_signatures = [Sig('foo', nargs=1)]
failures = ['', '-x', 'a b']
successes = [
('a', NS(foo=['a'])),
]
class TestPositionalsNargs2(ParserTestCase):
"""Test a Positional that specifies an nargs of 2"""
argument_signatures = [Sig('foo', nargs=2)]
failures = ['', 'a', '-x', 'a b c']
successes = [
('a b', NS(foo=['a', 'b'])),
]
class TestPositionalsNargsZeroOrMore(ParserTestCase):
"""Test a Positional that specifies unlimited nargs"""
argument_signatures = [Sig('foo', nargs='*')]
failures = ['-x']
successes = [
('', NS(foo=[])),
('a', NS(foo=['a'])),
('a b', NS(foo=['a', 'b'])),
]
class TestPositionalsNargsZeroOrMoreDefault(ParserTestCase):
"""Test a Positional that specifies unlimited nargs and a default"""
argument_signatures = [Sig('foo', nargs='*', default='bar')]
failures = ['-x']
successes = [
('', NS(foo='bar')),
('a', NS(foo=['a'])),
('a b', NS(foo=['a', 'b'])),
]
class TestPositionalsNargsOneOrMore(ParserTestCase):
"""Test a Positional that specifies one or more nargs"""
argument_signatures = [Sig('foo', nargs='+')]
failures = ['', '-x']
successes = [
('a', NS(foo=['a'])),
('a b', NS(foo=['a', 'b'])),
]
class TestPositionalsNargsOptional(ParserTestCase):
"""Tests an Optional Positional"""
argument_signatures = [Sig('foo', nargs='?')]
failures = ['-x', 'a b']
successes = [
('', NS(foo=None)),
('a', NS(foo='a')),
]