Preview: test_calltip.py
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/opt/alt/python37/lib64/python3.7/idlelib/idle_test/test_calltip.py
"Test calltip, coverage 60%"
from idlelib import calltip
import unittest
import textwrap
import types
import re
# Test Class TC is used in multiple get_argspec test methods
class TC():
'doc'
tip = "(ai=None, *b)"
def __init__(self, ai=None, *b): 'doc'
__init__.tip = "(self, ai=None, *b)"
def t1(self): 'doc'
t1.tip = "(self)"
def t2(self, ai, b=None): 'doc'
t2.tip = "(self, ai, b=None)"
def t3(self, ai, *args): 'doc'
t3.tip = "(self, ai, *args)"
def t4(self, *args): 'doc'
t4.tip = "(self, *args)"
def t5(self, ai, b=None, *args, **kw): 'doc'
t5.tip = "(self, ai, b=None, *args, **kw)"
def t6(no, self): 'doc'
t6.tip = "(no, self)"
def __call__(self, ci): 'doc'
__call__.tip = "(self, ci)"
def nd(self): pass # No doc.
# attaching .tip to wrapped methods does not work
@classmethod
def cm(cls, a): 'doc'
@staticmethod
def sm(b): 'doc'
tc = TC()
default_tip = calltip._default_callable_argspec
get_spec = calltip.get_argspec
class Get_argspecTest(unittest.TestCase):
# The get_spec function must return a string, even if blank.
# Test a variety of objects to be sure that none cause it to raise
# (quite aside from getting as correct an answer as possible).
# The tests of builtins may break if inspect or the docstrings change,
# but a red buildbot is better than a user crash (as has happened).
# For a simple mismatch, change the expected output to the actual.
def test_builtins(self):
def tiptest(obj, out):
self.assertEqual(get_spec(obj), out)
# Python class that inherits builtin methods
class List(list): "List() doc"
# Simulate builtin with no docstring for default tip test
class SB: __call__ = None
if List.__doc__ is not None:
tiptest(List,
f'(iterable=(), /){calltip._argument_positional}'
f'\n{List.__doc__}')
tiptest(list.__new__,
'(*args, **kwargs)\n'
'Create and return a new object. '
'See help(type) for accurate signature.')
tiptest(list.__init__,
'(self, /, *args, **kwargs)'
+ calltip._argument_positional + '\n' +
'Initialize self. See help(type(self)) for accurate signature.')
append_doc = (calltip._argument_positional
+ "\nAppend object to the end of the list.")
tiptest(list.append, '(self, object, /)' + append_doc)
tiptest(List.append, '(self, object, /)' + append_doc)
tiptest([].append, '(object, /)' + append_doc)
tiptest(types.MethodType, "method(function, instance)")
tiptest(SB(), default_tip)
p = re.compile('')
tiptest(re.sub, '''\
(pattern, repl, string, count=0, flags=0)
Return the string obtained by replacing the leftmost
non-overlapping occurrences of the pattern in string by the
replacement repl. repl can be either a string or a callable;
if a string, backslash escapes in it are processed. If it is
a callable, it's passed the Match object and must return''')
tiptest(p.sub, '''\
(repl, string, count=0)
Return the string obtained by replacing the leftmost \
non-overlapping occurrences o...''')
def test_signature_wrap(self):
if textwrap.TextWrapper.__doc__ is not None:
self.assertEqual(get_spec(textwrap.TextWrapper), '''\
(width=70, initial_indent='', subsequent_indent='', expand_tabs=True,
replace_whitespace=True, fix_sentence_endings=False, break_long_words=True,
drop_whitespace=True, break_on_hyphens=True, tabsize=8, *, max_lines=None,
placeholder=' [...]')''')
def test_properly_formated(self):
def foo(s='a'*100):
pass
def bar(s='a'*100):
"""Hello Guido"""
pass
def baz(s='a'*100, z='b'*100):
pass
indent = calltip._INDENT
sfoo = "(s='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"\
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n" + indent + "aaaaaaaaa"\
"aaaaaaaaaa')"
sbar = "(s='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"\
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n" + indent + "aaaaaaaaa"\
"aaaaaaaaaa')\nHello Guido"
sbaz = "(s='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"\
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n" + indent + "aaaaaaaaa"\
"aaaaaaaaaa', z='bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"\
"bbbbbbbbbbbbbbbbb\n" + indent + "bbbbbbbbbbbbbbbbbbbbbb"\
"bbbbbbbbbbbbbbbbbbbbbb')"
for func,doc in [(foo, sfoo), (bar, sbar), (baz, sbaz)]:
with self.subTest(func=func, doc=doc):
self.assertEqual(get_spec(func), doc)
def test_docline_truncation(self):
def f(): pass
f.__doc__ = 'a'*300
self.assertEqual(get_spec(f), f"()\n{'a'*(calltip._MAX_COLS-3) + '...'}")
def test_multiline_docstring(self):
# Test fewer lines than max.
self.assertEqual(get_spec(range),
"range(stop) -> range object\n"
"range(start, stop[, step]) -> range object")
# Test max lines
self.assertEqual(get_spec(bytes), '''\
bytes(iterable_of_ints) -> bytes
bytes(string, encoding[, errors]) -> bytes
bytes(bytes_or_buffer) -> immutable copy of bytes_or_buffer
bytes(int) -> bytes object of size given by the parameter initialized with null bytes
bytes() -> empty bytes object''')
# Test more than max lines
def f(): pass
f.__doc__ = 'a\n' * 15
self.assertEqual(get_spec(f), '()' + '\na' * calltip._MAX_LINES)
def test_functions(self):
def t1(): 'doc'
t1.tip = "()"
def t2(a, b=None): 'doc'
t2.tip = "(a, b=None)"
def t3(a, *args): 'doc'
t3.tip = "(a, *args)"
def t4(*args): 'doc'
t4.tip = "(*args)"
def t5(a, b=None, *args, **kw): 'doc'
t5.tip = "(a, b=None, *args, **kw)"
doc = '\ndoc' if t1.__doc__ is not None else ''
for func in (t1, t2, t3, t4, t5, TC):
with self.subTest(func=func):
self.assertEqual(get_spec(func), func.tip + doc)
def test_methods(self):
doc = '\ndoc' if TC.__doc__ is not None else ''
for meth in (TC.t1, TC.t2, TC.t3, TC.t4, TC.t5, TC.t6, TC.__call__):
with self.subTest(meth=meth):
self.assertEqual(get_spec(meth), meth.tip + doc)
self.assertEqual(get_spec(TC.cm), "(a)" + doc)
self.assertEqual(get_spec(TC.sm), "(b)" + doc)
def test_bound_methods(self):
# test that first parameter is correctly removed from argspec
doc = '\ndoc' if TC.__doc__ is not None else ''
for meth, mtip in ((tc.t1, "()"), (tc.t4, "(*args)"),
(tc.t6, "(self)"), (tc.__call__, '(ci)'),
(tc, '(ci)'), (TC.cm, "(a)"),):
with self.subTest(meth=meth, mtip=mtip):
self.assertEqual(get_spec(meth), mtip + doc)
def test_starred_parameter(self):
# test that starred first parameter is *not* removed from argspec
class C:
def m1(*args): pass
c = C()
for meth, mtip in ((C.m1, '(*args)'), (c.m1, "(*args)"),):
with self.subTest(meth=meth, mtip=mtip):
self.assertEqual(get_spec(meth), mtip)
def test_invalid_method_get_spec(self):
class C:
def m2(**kwargs): pass
class Test:
def __call__(*, a): pass
mtip = calltip._invalid_method
self.assertEqual(get_spec(C().m2), mtip)
self.assertEqual(get_spec(Test()), mtip)
def test_non_ascii_name(self):
# test that re works to delete a first parameter name that
# includes non-ascii chars, such as various forms of A.
uni = "(A\u0391\u0410\u05d0\u0627\u0905\u1e00\u3042, a)"
assert calltip._first_param.sub('', uni) == '(a)'
def test_no_docstring(self):
for meth, mtip in ((TC.nd, "(self)"), (tc.nd, "()")):
with self.subTest(meth=meth, mtip=mtip):
self.assertEqual(get_spec(meth), mtip)
def test_buggy_getattr_class(self):
class NoCall:
def __getattr__(self, name): # Not invoked for class attribute.
raise IndexError # Bug.
class CallA(NoCall):
def __call__(self, ci): # Bug does not matter.
pass
class CallB(NoCall):
def __call__(oui, a, b, c): # Non-standard 'self'.
pass
for meth, mtip in ((NoCall, default_tip), (CallA, default_tip),
(NoCall(), ''), (CallA(), '(ci)'),
(CallB(), '(a, b, c)')):
with self.subTest(meth=meth, mtip=mtip):
self.assertEqual(get_spec(meth), mtip)
def test_metaclass_class(self): # Failure case for issue 38689.
class Type(type): # Type() requires 3 type args, returns class.
__class__ = property({}.__getitem__, {}.__setitem__)
class Object(metaclass=Type):
__slots__ = '__class__'
for meth, mtip in ((Type, default_tip), (Object, default_tip),
(Object(), '')):
with self.subTest(meth=meth, mtip=mtip):
self.assertEqual(get_spec(meth), mtip)
def test_non_callables(self):
for obj in (0, 0.0, '0', b'0', [], {}):
with self.subTest(obj=obj):
self.assertEqual(get_spec(obj), '')
class Get_entityTest(unittest.TestCase):
def test_bad_entity(self):
self.assertIsNone(calltip.get_entity('1/0'))
def test_good_entity(self):
self.assertIs(calltip.get_entity('int'), int)
if __name__ == '__main__':
unittest.main(verbosity=2)
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