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import sys
import pytest
from napari_plugin_engine.implementation import varnames
from napari_plugin_engine.manager import (
_formatdef,
ensure_namespace,
temp_path_additions,
)
def test_varnames():
def f(x):
i = 3 # noqa
class A:
def f(self, y):
pass
class B:
def __call__(self, z):
pass
assert varnames(f) == (("x",), ())
assert varnames(A().f) == (("y",), ())
assert varnames(B()) == (("z",), ())
def test_varnames_default():
def f(x, y=3):
pass
assert varnames(f) == (("x",), ("y",))
def test_varnames_class():
class C:
def __init__(self, x):
pass
class D:
pass
class E:
def __init__(self, x):
pass
class F:
pass
assert varnames(C) == (("x",), ())
assert varnames(D) == ((), ())
assert varnames(E) == (("x",), ())
assert varnames(F) == ((), ())
@pytest.mark.skipif(
sys.version_info < (3,), reason="Keyword only arguments are Python 3 only"
)
def test_varnames_keyword_only():
# SyntaxError on Python 2, so we exec
ns = {}
exec(
"def f1(x, *, y): pass\n"
"def f2(x, *, y=3): pass\n"
"def f3(x=1, *, y=3): pass\n",
ns,
)
assert varnames(ns["f1"]) == (("x",), ())
assert varnames(ns["f2"]) == (("x",), ())
assert varnames(ns["f3"]) == ((), ("x",))
def test_formatdef():
def function1():
pass
assert _formatdef(function1) == "function1()"
def function2(arg1):
pass
assert _formatdef(function2) == "function2(arg1)"
def function3(arg1, arg2="qwe"):
pass
assert _formatdef(function3) == "function3(arg1, arg2='qwe')"
def function4(arg1, *args, **kwargs):
pass
assert _formatdef(function4) == "function4(arg1, *args, **kwargs)"
def test_ensure_namespace():
a = {'x': 1}
assert not getattr(a, 'x', None)
b = ensure_namespace(a)
assert getattr(b, 'x') == 1
assert a != b
with pytest.raises(ValueError):
# '0' is not a valid identifyer
ensure_namespace({0: 1})
class AlreadyNameSpace:
x = 1
# doesn't touch things that are already valid namespaces
assert ensure_namespace(AlreadyNameSpace) == AlreadyNameSpace
def test_temp_path():
import sys
orig_path = set(sys.path)
with temp_path_additions('/path/') as pth:
assert sys.path == pth
assert '/path/' in sys.path
assert set(sys.path) == orig_path
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