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# -*- coding: utf-8 -*-
"""Shared fixtures.
Most tests build *synthetic* distribution layouts in tmp_path: wppm's target
resolution is pure path logic, so a directory tree with an empty `python.exe`
in it exercises the real code without needing a real interpreter. That keeps
the suite fast, offline and deterministic.
Only the end-to-end CLI tests need a real interpreter, and they use a plain
`python -m venv` (which bundles pip via ensurepip, so still no network).
"""
import
subprocess
import
sys
from
pathlib
import
Path
import
pytest
IS_WINDOWS
=
sys
.
platform
==
"win32"
windows_only
=
pytest
.
mark
.
skipif
(
not
IS_WINDOWS
,
reason
=
"wppm targets the Windows layout (python.exe / Scripts)"
)
def
write_dist
(
site_packages
:
Path
,
name
:
str
,
version
:
str
,
requires
=
(),
summary
:
str
=
""
,
extras
=
())
->
Path
:
"""Write a minimal .dist-info so importlib.metadata can discover the package."""
dist_info
=
site_packages
/
f"
{
name
.
replace
(
'-'
,
'_'
)
}
-
{
version
}
.dist-info"
dist_info
.
mkdir
(
parents
=
True
,
exist_ok
=
True
)
lines
=
[
"Metadata-Version: 2.1"
,
f"Name:
{
name
}
"
,
f"Version:
{
version
}
"
]
if
summary
:
lines
.
append
(
f"Summary:
{
summary
}
"
)
lines
+=
[
f"Provides-Extra:
{
e
}
"
for
e
in
extras
]
lines
+=
[
f"Requires-Dist:
{
r
}
"
for
r
in
requires
]
(
dist_info
/
"METADATA"
).
write_text
(
"
\n
"
.
join
(
lines
)
+
"
\n
"
,
encoding
=
"utf-8"
)
(
dist_info
/
"INSTALLER"
).
write_text
(
"pytest
\n
"
,
encoding
=
"utf-8"
)
return
dist_info
@
pytest
.
fixture
def
winpython_layout
(
tmp_path
:
Path
)
->
Path
:
"""WinPython/plain install: python.exe at the root, Lib/site-packages beside it.
Also creates the distribution-root `scripts/` sibling that holds env.bat --
that directory is NOT a venv Scripts dir and must not be mistaken for one.
"""
root
=
tmp_path
/
"WPy64-31470b3"
/
"python"
(
root
/
"Lib"
/
"site-packages"
).
mkdir
(
parents
=
True
)
(
root
/
"Scripts"
).
mkdir
()
(
root
/
"python.exe"
).
write_bytes
(
b"MZ"
)
distro_root
=
root
.
parent
(
distro_root
/
"scripts"
).
mkdir
()
(
distro_root
/
"scripts"
/
"env.bat"
).
write_text
(
"@echo off
\n
"
,
encoding
=
"utf-8"
)
(
distro_root
/
"wheelhouse"
).
mkdir
()
return
root
@
pytest
.
fixture
def
venv_layout
(
tmp_path
:
Path
)
->
Path
:
"""venv: python.exe under Scripts/, Lib/site-packages at the root, pyvenv.cfg marker."""
root
=
tmp_path
/
"myvenv"
(
root
/
"Scripts"
).
mkdir
(
parents
=
True
)
(
root
/
"Lib"
/
"site-packages"
).
mkdir
(
parents
=
True
)
(
root
/
"Scripts"
/
"python.exe"
).
write_bytes
(
b"MZ"
)
(
root
/
"pyvenv.cfg"
).
write_text
(
"home = C:
\\
Python
\n
version = 3.14.6
\n
"
,
encoding
=
"utf-8"
)
return
root
@
pytest
.
fixture
(
scope
=
"session"
)
def
real_venv
(
tmp_path_factory
)
->
Path
:
"""A genuine venv. ensurepip is bundled, so this needs no network."""
if
not
IS_WINDOWS
:
pytest
.
skip
(
"wppm targets the Windows layout"
)
target
=
tmp_path_factory
.
mktemp
(
"real"
)
/
"venv"
proc
=
subprocess
.
run
(
[
sys
.
executable
,
"-m"
,
"venv"
,
str
(
target
)],
capture_output
=
True
,
text
=
True
,
)
if
proc
.
returncode
!=
0
:
pytest
.
skip
(
f"could not create a venv:
{
proc
.
stderr
.
strip
()[:
200
]
}
"
)
return
target
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