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[mypyc] Provide instructions for resolving missing test module on Windows #19579

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Merged
merged 2 commits into from
Aug 9, 2025
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Merged

[mypyc] Provide instructions for resolving missing test module on Windows #19579

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Provide instructions for resolving missing test module on Windows
emmatyping Aug 3, 2025
420c7ef
Apply suggestion to wording from sterliakov
emmatyping Aug 5, 2025
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19 changes: 16 additions & 3 deletions mypyc/test-data/run-tuples.test
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Original file line number Diff line number Diff line change
Expand Up @@ -131,10 +131,23 @@ import sys
from typing import Optional
from native import ClassIR, FuncIR, Record

HAVE_TEST = False
if sys.version_info >= (3, 14):
from test.support import EqualToForwardRef
type_forward_ref = EqualToForwardRef
else:
try:
from test.support import EqualToForwardRef
type_forward_ref = EqualToForwardRef
HAVE_TEST = True
except ImportError as e:
# catch the case of a pymanager installed Python
# without the test module. It is excluded by default
# on Windows.
msg = 'Missing "test" module.'
if sys.platform == "win32":
msg += (' Please install a version of Python with the test module.'
' If you are using pymanager, try running pymanager install --force PythonTest\\<version>')
raise ImportError(msg) from e

if not HAVE_TEST:
from typing import ForwardRef
type_forward_ref = ForwardRef

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