Skip to content

gh-90172: add test for functools.singledispatch on Union types with None type #92174

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
JelleZijlstra merged 4 commits into from
May 3, 2022
Merged

gh-90172: add test for functools.singledispatch on Union types with None type #92174

Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
b1d5522
added test for functools.singledispatch on Union types with None type
pr-watson May 2, 2022
baafeca
Update Lib/test/test_functools.py
JelleZijlstra May 2, 2022
cf72d7e
fix indentation
JelleZijlstra May 2, 2022
f587878
Feedback from Serhiy
JelleZijlstra May 3, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
43 changes: 43 additions & 0 deletions Lib/test/test_functools.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2792,6 +2792,49 @@ def _(arg: int | float):
self.assertEqual(f(1), "types.UnionType")
self.assertEqual(f(1.0), "types.UnionType")

def test_union_conflict(self):
@functools.singledispatch
def f(arg):
return "default"

@f.register
def _(arg: typing.Union[str, bytes]):
return "typing.Union"

@f.register
def _(arg: int | str):
return "types.UnionType"

self.assertEqual(f([]), "default")
self.assertEqual(f(""), "types.UnionType") # last one wins
self.assertEqual(f(b""), "typing.Union")
self.assertEqual(f(1), "types.UnionType")

def test_union_None(self):
@functools.singledispatch
def typing_union(arg):
return "default"

@typing_union.register
def _(arg: typing.Union[str, None]):
return "typing.Union"

self.assertEqual(typing_union(1), "default")
self.assertEqual(typing_union(""), "typing.Union")
self.assertEqual(typing_union(None), "typing.Union")

@functools.singledispatch
def types_union(arg):
return "default"

@types_union.register
def _(arg: int | None):
return "types.UnionType"

Comment thread
JelleZijlstra marked this conversation as resolved.
Resolved
self.assertEqual(types_union(""), "default")
self.assertEqual(types_union(1), "types.UnionType")
self.assertEqual(types_union(None), "types.UnionType")

Comment thread
JelleZijlstra marked this conversation as resolved.
Resolved
def test_register_genericalias(self):
@functools.singledispatch
def f(arg):
Expand Down