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5369 lines (4327 loc) · 175 KB
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# Author: Steven J. Bethard <steven.bethard@gmail.com>.
import inspect
import os
import shutil
import stat
import sys
import textwrap
import tempfile
import unittest
import argparse
from io import StringIO
from test import support
from unittest import mock
class StdIOBuffer(StringIO):
pass
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 = support.EnvironmentVarGuard()
env['COLUMNS'] = '80'
self.addCleanup(env.__exit__)
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_readonly_file(self, filename):
file_path = os.path.join(self.temp_dir, filename)
with open(file_path, 'w') as file:
file.write(filename)
os.chmod(file_path, 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)):
if getattr(result, key) is sys.stdout:
setattr(result, key, old_stdout)
if getattr(result, key) is sys.stderr:
setattr(result, key, old_stderr)
return result
except SystemExit:
code = sys.exc_info()[1].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 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')),
]
class TestPositionalsNargsOptionalDefault(ParserTestCase):
"""Tests an Optional Positional with a default value"""
argument_signatures = [Sig('foo', nargs='?', default=42)]
failures = ['-x', 'a b']
successes = [
('', NS(foo=42)),
('a', NS(foo='a')),
]
class TestPositionalsNargsOptionalConvertedDefault(ParserTestCase):
"""Tests an Optional Positional with a default value
that needs to be converted to the appropriate type.
"""
argument_signatures = [
Sig('foo', nargs='?', type=int, default='42'),
]
failures = ['-x', 'a b', '1 2']
successes = [
('', NS(foo=42)),
('1', NS(foo=1)),
]
class TestPositionalsNargsNoneNone(ParserTestCase):
"""Test two Positionals that don't specify nargs"""
argument_signatures = [Sig('foo'), Sig('bar')]
failures = ['', '-x', 'a', 'a b c']
successes = [
('a b', NS(foo='a', bar='b')),
]
class TestPositionalsNargsNone1(ParserTestCase):
"""Test a Positional with no nargs followed by one with 1"""
argument_signatures = [Sig('foo'), Sig('bar', nargs=1)]
failures = ['', '--foo', 'a', 'a b c']
successes = [
('a b', NS(foo='a', bar=['b'])),
]