Lib/test/test_getopt.py

# test_getopt.py
# David Goodger <dgoodger@bigfoot.com> 2000-08-19

import getopt
from getopt import GetoptError
from test_support import verbose

def expectException(teststr, expected, failure=AssertionError):
    """Executes a statement passed in teststr, and raises an exception
       (failure) if the expected exception is *not* raised."""
    try:
        exec teststr
    except expected:
        pass
    else:
        raise failure

if verbose:
    print 'Running tests on getopt.short_has_arg'
assert getopt.short_has_arg('a', 'a:')
assert not getopt.short_has_arg('a', 'a')
expectException("tmp = getopt.short_has_arg('a', 'b')", GetoptError)
expectException("tmp = getopt.short_has_arg('a', '')", GetoptError)

if verbose:
    print 'Running tests on getopt.long_has_args'
has_arg, option = getopt.long_has_args('abc', ['abc='])
assert has_arg
assert option == 'abc'
has_arg, option = getopt.long_has_args('abc', ['abc'])
assert not has_arg
assert option == 'abc'
has_arg, option = getopt.long_has_args('abc', ['abcd'])
assert not has_arg
assert option == 'abcd'
expectException("has_arg, option = getopt.long_has_args('abc', ['def'])",
                GetoptError)
expectException("has_arg, option = getopt.long_has_args('abc', [])",
                GetoptError)
expectException("has_arg, option = " + \
                     "getopt.long_has_args('abc', ['abcd','abcde'])",
                GetoptError)

if verbose:
    print 'Running tests on getopt.do_shorts'
opts, args = getopt.do_shorts([], 'a', 'a', [])
assert opts == [('-a', '')]
assert args == []
opts, args = getopt.do_shorts([], 'a1', 'a:', [])
assert opts == [('-a', '1')]
assert args == []
#opts, args = getopt.do_shorts([], 'a=1', 'a:', [])
#assert opts == [('-a', '1')]
#assert args == []
opts, args = getopt.do_shorts([], 'a', 'a:', ['1'])
assert opts == [('-a', '1')]
assert args == []
opts, args = getopt.do_shorts([], 'a', 'a:', ['1', '2'])
assert opts == [('-a', '1')]
assert args == ['2']
expectException("opts, args = getopt.do_shorts([], 'a1', 'a', [])",
                GetoptError)
expectException("opts, args = getopt.do_shorts([], 'a', 'a:', [])",
                GetoptError)

if verbose:
    print 'Running tests on getopt.do_longs'
opts, args = getopt.do_longs([], 'abc', ['abc'], [])
assert opts == [('--abc', '')]
assert args == []
opts, args = getopt.do_longs([], 'abc=1', ['abc='], [])
assert opts == [('--abc', '1')]
assert args == []
opts, args = getopt.do_longs([], 'abc=1', ['abcd='], [])
assert opts == [('--abcd', '1')]
assert args == []
expectException("opts, args = getopt.do_longs([], 'abc=1', ['abc'], [])",
                GetoptError)
expectException("opts, args = getopt.do_longs([], 'abc', ['abc='], [])",
                GetoptError)

# note: the empty string between '-a' and '--beta' is significant:
# it simulates an empty string option argument ('-a ""') on the command line.
cmdline = ['-a', '1', '-b', '--alpha=2', '--beta', '-a', '3', '-a', '',
           '--beta', 'arg1', 'arg2']

if verbose:
    print 'Running tests on getopt.getopt'
opts, args = getopt.getopt(cmdline, 'a:b', ['alpha=', 'beta'])
assert opts == [('-a', '1'), ('-b', ''), ('--alpha', '2'), ('--beta', ''),
                ('-a', '3'), ('-a', ''), ('--beta', '')]
# Note ambiguity of ('-b', '') and ('-a', '') above. This must be
# accounted for in the code that calls getopt().
assert args == ['arg1', 'arg2']

expectException(
    "opts, args = getopt.getopt(cmdline, 'a:b', ['alpha', 'beta'])",
    GetoptError)

if verbose:
    print "Module getopt: tests completed successfully."