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301 lines
9.4 KiB
Python
301 lines
9.4 KiB
Python
"""
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Test the func_inspect module.
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"""
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# Author: Gael Varoquaux <gael dot varoquaux at normalesup dot org>
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# Copyright (c) 2009 Gael Varoquaux
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# License: BSD Style, 3 clauses.
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import functools
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from joblib.func_inspect import filter_args, get_func_name, get_func_code
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from joblib.func_inspect import _clean_win_chars, format_signature
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from joblib.memory import Memory
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from joblib.test.common import with_numpy
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from joblib.testing import fixture, parametrize, raises
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from joblib._compat import PY3_OR_LATER
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###############################################################################
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# Module-level functions and fixture, for tests
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def f(x, y=0):
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pass
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def g(x):
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pass
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def h(x, y=0, *args, **kwargs):
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pass
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def i(x=1):
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pass
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def j(x, y, **kwargs):
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pass
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def k(*args, **kwargs):
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pass
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@fixture(scope='module')
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def cached_func(tmpdir_factory):
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# Create a Memory object to test decorated functions.
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# We should be careful not to call the decorated functions, so that
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# cache directories are not created in the temp dir.
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cachedir = tmpdir_factory.mktemp("joblib_test_func_inspect")
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mem = Memory(cachedir.strpath)
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@mem.cache
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def cached_func_inner(x):
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return x
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return cached_func_inner
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class Klass(object):
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def f(self, x):
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return x
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###############################################################################
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# Tests
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@parametrize('func,args,filtered_args',
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[(f, [[], (1, )], {'x': 1, 'y': 0}),
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(f, [['x'], (1, )], {'y': 0}),
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(f, [['y'], (0, )], {'x': 0}),
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(f, [['y'], (0, ), {'y': 1}], {'x': 0}),
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(f, [['x', 'y'], (0, )], {}),
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(f, [[], (0,), {'y': 1}], {'x': 0, 'y': 1}),
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(f, [['y'], (), {'x': 2, 'y': 1}], {'x': 2}),
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(g, [[], (), {'x': 1}], {'x': 1}),
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(i, [[], (2, )], {'x': 2})])
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def test_filter_args(func, args, filtered_args):
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assert filter_args(func, *args) == filtered_args
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def test_filter_args_method():
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obj = Klass()
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assert filter_args(obj.f, [], (1, )) == {'x': 1, 'self': obj}
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@parametrize('func,args,filtered_args',
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[(h, [[], (1, )],
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{'x': 1, 'y': 0, '*': [], '**': {}}),
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(h, [[], (1, 2, 3, 4)],
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{'x': 1, 'y': 2, '*': [3, 4], '**': {}}),
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(h, [[], (1, 25), {'ee': 2}],
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{'x': 1, 'y': 25, '*': [], '**': {'ee': 2}}),
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(h, [['*'], (1, 2, 25), {'ee': 2}],
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{'x': 1, 'y': 2, '**': {'ee': 2}})])
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def test_filter_varargs(func, args, filtered_args):
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assert filter_args(func, *args) == filtered_args
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test_filter_kwargs_extra_params = []
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if PY3_OR_LATER:
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m1 = m2 = None
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# The following statements raise SyntaxError in python 2
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# because kwargonly is not supported
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exec("def m1(x, *, y): pass")
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exec("def m2(x, *, y, z=3): pass")
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test_filter_kwargs_extra_params.extend([
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(m1, [[], (1,), {'y': 2}], {'x': 1, 'y': 2}),
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(m2, [[], (1,), {'y': 2}], {'x': 1, 'y': 2, 'z': 3})
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])
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@parametrize('func,args,filtered_args',
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[(k, [[], (1, 2), {'ee': 2}],
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{'*': [1, 2], '**': {'ee': 2}}),
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(k, [[], (3, 4)],
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{'*': [3, 4], '**': {}})] +
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test_filter_kwargs_extra_params)
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def test_filter_kwargs(func, args, filtered_args):
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assert filter_args(func, *args) == filtered_args
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def test_filter_args_2():
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assert (filter_args(j, [], (1, 2), {'ee': 2}) ==
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{'x': 1, 'y': 2, '**': {'ee': 2}})
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ff = functools.partial(f, 1)
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# filter_args has to special-case partial
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assert filter_args(ff, [], (1, )) == {'*': [1], '**': {}}
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assert filter_args(ff, ['y'], (1, )) == {'*': [1], '**': {}}
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@parametrize('func,funcname', [(f, 'f'), (g, 'g'),
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(cached_func, 'cached_func')])
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def test_func_name(func, funcname):
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# Check that we are not confused by decoration
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# here testcase 'cached_func' is the function itself
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assert get_func_name(func)[1] == funcname
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def test_func_name_on_inner_func(cached_func):
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# Check that we are not confused by decoration
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# here testcase 'cached_func' is the 'cached_func_inner' function
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# returned by 'cached_func' fixture
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assert get_func_name(cached_func)[1] == 'cached_func_inner'
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def test_func_inspect_errors():
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# Check that func_inspect is robust and will work on weird objects
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assert get_func_name('a'.lower)[-1] == 'lower'
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assert get_func_code('a'.lower)[1:] == (None, -1)
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ff = lambda x: x
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assert get_func_name(ff, win_characters=False)[-1] == '<lambda>'
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assert get_func_code(ff)[1] == __file__.replace('.pyc', '.py')
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# Simulate a function defined in __main__
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ff.__module__ = '__main__'
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assert get_func_name(ff, win_characters=False)[-1] == '<lambda>'
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assert get_func_code(ff)[1] == __file__.replace('.pyc', '.py')
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if PY3_OR_LATER:
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# Avoid flake8 F821 "undefined name" warning. func_with_kwonly_args and
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# func_with_signature are redefined in the exec statement a few lines below
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def func_with_kwonly_args():
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pass
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def func_with_signature():
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pass
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# exec is needed to define a function with a keyword-only argument and a
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# function with signature while avoiding a SyntaxError on Python 2
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exec("""
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def func_with_kwonly_args(a, b, *, kw1='kw1', kw2='kw2'): pass
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def func_with_signature(a: int, b: int) -> None: pass
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""")
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def test_filter_args_python_3():
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assert (
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filter_args(func_with_kwonly_args, [], (1, 2),
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{'kw1': 3, 'kw2': 4}) ==
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{'a': 1, 'b': 2, 'kw1': 3, 'kw2': 4})
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# filter_args doesn't care about keyword-only arguments so you
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# can pass 'kw1' into *args without any problem
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with raises(ValueError) as excinfo:
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filter_args(func_with_kwonly_args, [], (1, 2, 3), {'kw2': 2})
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excinfo.match("Keyword-only parameter 'kw1' was passed as positional "
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"parameter")
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assert (
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filter_args(func_with_kwonly_args, ['b', 'kw2'], (1, 2),
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{'kw1': 3, 'kw2': 4}) ==
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{'a': 1, 'kw1': 3})
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assert (filter_args(func_with_signature, ['b'], (1, 2)) == {'a': 1})
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def test_bound_methods():
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""" Make sure that calling the same method on two different instances
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of the same class does resolv to different signatures.
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"""
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a = Klass()
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b = Klass()
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assert filter_args(a.f, [], (1, )) != filter_args(b.f, [], (1, ))
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@parametrize('exception,regex,func,args',
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[(ValueError, 'ignore_lst must be a list of parameters to ignore',
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f, ['bar', (None, )]),
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(ValueError, r'Ignore list: argument \'(.*)\' is not defined',
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g, [['bar'], (None, )]),
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(ValueError, 'Wrong number of arguments',
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h, [[]])])
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def test_filter_args_error_msg(exception, regex, func, args):
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""" Make sure that filter_args returns decent error messages, for the
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sake of the user.
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"""
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with raises(exception) as excinfo:
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filter_args(func, *args)
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excinfo.match(regex)
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def test_filter_args_no_kwargs_mutation():
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"""None-regression test against 0.12.0 changes.
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https://github.com/joblib/joblib/pull/75
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Make sure filter args doesn't mutate the kwargs dict that gets passed in.
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"""
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kwargs = {'x': 0}
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filter_args(g, [], [], kwargs)
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assert kwargs == {'x': 0}
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def test_clean_win_chars():
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string = r'C:\foo\bar\main.py'
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mangled_string = _clean_win_chars(string)
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for char in ('\\', ':', '<', '>', '!'):
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assert char not in mangled_string
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@parametrize('func,args,kwargs,sgn_expected',
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[(g, [list(range(5))], {}, 'g([0, 1, 2, 3, 4])'),
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(k, [1, 2, (3, 4)], {'y': True}, 'k(1, 2, (3, 4), y=True)')])
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def test_format_signature(func, args, kwargs, sgn_expected):
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# Test signature formatting.
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path, sgn_result = format_signature(func, *args, **kwargs)
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assert sgn_result == sgn_expected
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def test_format_signature_long_arguments():
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shortening_threshold = 1500
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# shortening gets it down to 700 characters but there is the name
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# of the function in the signature and a few additional things
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# like dots for the ellipsis
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shortening_target = 700 + 10
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arg = 'a' * shortening_threshold
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_, signature = format_signature(h, arg)
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assert len(signature) < shortening_target
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nb_args = 5
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args = [arg for _ in range(nb_args)]
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_, signature = format_signature(h, *args)
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assert len(signature) < shortening_target * nb_args
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kwargs = {str(i): arg for i, arg in enumerate(args)}
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_, signature = format_signature(h, **kwargs)
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assert len(signature) < shortening_target * nb_args
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_, signature = format_signature(h, *args, **kwargs)
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assert len(signature) < shortening_target * 2 * nb_args
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@with_numpy
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def test_format_signature_numpy():
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""" Test the format signature formatting with numpy.
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"""
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def test_special_source_encoding():
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from joblib.test.test_func_inspect_special_encoding import big5_f
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func_code, source_file, first_line = get_func_code(big5_f)
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assert first_line == 5
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assert "def big5_f():" in func_code
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assert "test_func_inspect_special_encoding" in source_file
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def _get_code():
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from joblib.test.test_func_inspect_special_encoding import big5_f
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return get_func_code(big5_f)[0]
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def test_func_code_consistency():
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from joblib.parallel import Parallel, delayed
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codes = Parallel(n_jobs=2)(delayed(_get_code)() for _ in range(5))
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assert len(set(codes)) == 1
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