def test_args_call_pos (self):
assert _args(isstring)()
assert _args(isstring)('dharma')
assert _args(isstring)('dharma', 'miles')
assert not _args(isstring)(4, "bad robot!")
assert _and(_args(isstring),
_args(_not(isempty)))('jack', 'sawyer')
assert not _and(_args(isstring),
_args(_not(isempty)))('jack', 'sawyer', '')
def test_args_idx (self):
assert _args[0](isstring)("bad robot!", 4, 8)
assert _args[-1](isint)(4, (), 8)
assert _and(_args[0](isstring),
_args[1](isnone))("bad robot!", None)
assert not _args[0](isstring)(4, "bad robot!")
def test_args_mix_call_idx (self):
assert _args[0](isstring, ricardo=isstring)("bad robot!", 4, 8, ricardo='#2')
assert _args[-1](isint, ricardo=isstring)(4, (), 8, ricardo='#2')
assert _and(_args[0](isstring),
_args[1](isnone))("bad robot!", None)
assert not _args[0](isint, ricardo=isstring)("bad robot!", ricardo='#2')
assert not _args[0](isint, ricardo=isstring)(4, "bad robot!", ricardo=2)
def test_and (self):
# no predicates
assert _and()(True)
# single predicate
assert _and(isempty)('')
assert _and(istrue)(True)
assert not _and(isfalse)(True)
assert not _and(istrue)(False)
# multiple predicates
assert _and(isempty, not_)('')
assert not _and(isfalse, isstring)(False)
assert not _and(isfalse, isstring)(True)
assert not _and(istrue, isstring)(False)
def test_args_idx_slice (self):
assert _args[:](isstring)()
assert _args[:](isstring)('dharma')
assert _args[:](isstring)('dharma', 'miles')
assert _args[:2](isstring)('dharma', 'miles')
assert _args[0:1](isstring)("bad robot!", 4, 8)
assert _args[2:4](isstring)(4, 8, 'linus', 'juliet')
assert _args[2:](isstring)(4, 8, 'linus', 'juliet')
assert _args[1::2](isstring)(4, 'linus', 8, 'juliet', 15, 'hurley', 16)
assert _args[1:2](isiterable)(4, (), 8)
assert _args[:-1](isint)(4, 8, ())
assert _args[-3:-1](isint)(4, 8, ())
assert not _args[0:1](isstring)(4, "bad robot!")
assert not _args[:](isstring)('dharma', 4, 8, 15, 16, 23, 42)
assert _and(_args[0:1](isstring),
_args[1:2](isnone))("bad robot!", None)
def test_short_circuit (self):
assert not _and(false, fail)()
assert _or(true, fail)()
assert not _not(true, fail)()
def test_composition (self):
assert not _and(_not(isstring), _or(isempty, isatom))('')
assert _and(_not(isstring), _or(isempty, isatom))(())
assert _and(_not(isstring), _or(isempty, isatom))(42)
