Start fixing venv test fixture pip toml bug

This is not yet a usable fix, because venv.create only supports
upgrade_deps on Python 3.9 and higher.

Author: EliahKagan

test/lib/helper.py

@@ -403,13 +403,13 @@ class VirtualEnvironment:
 
     __slots__ = ("_env_dir",)
 
-    def __init__(self, env_dir, *, with_pip):
+    def __init__(self, env_dir, *, need_pip):
         if os.name == "nt":
             self._env_dir = osp.realpath(env_dir)
-            venv.create(self.env_dir, symlinks=False, with_pip=with_pip)
+            venv.create(self.env_dir, symlinks=False, with_pip=need_pip, upgrade_deps=need_pip)
         else:
             self._env_dir = env_dir
-            venv.create(self.env_dir, symlinks=True, with_pip=with_pip)
+            venv.create(self.env_dir, symlinks=True, with_pip=need_pip, upgrade_deps=need_pip)
 
     @property
     def env_dir(self):

test/test_index.py

@@ -1060,7 +1060,7 @@ def test_hook_uses_shell_not_from_cwd(self, rw_dir, case):
         # from a venv may not run when copied outside of it, and a global interpreter
         # won't run when copied to a different location if it was installed from the
         # Microsoft Store. So we make a new venv in rw_dir and use its interpreter.
-        venv = VirtualEnvironment(rw_dir, with_pip=False)
+        venv = VirtualEnvironment(rw_dir, need_pip=False)
         shutil.copy(venv.python, Path(rw_dir, shell_name))
         shutil.copy(fixture_path("polyglot"), hook_path("polyglot", repo.git_dir))
         payload = Path(rw_dir, "payload.txt")

test/test_installation.py

@@ -64,7 +64,7 @@ def test_installation(self, rw_dir):
 
     @staticmethod
     def _set_up_venv(rw_dir):
-        venv = VirtualEnvironment(rw_dir, with_pip=True)
+        venv = VirtualEnvironment(rw_dir, need_pip=True)
         os.symlink(
             os.path.dirname(os.path.dirname(__file__)),
             venv.sources,