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test(bootstrap): skip venv.EnvBuilder.create() in fail-loud test

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The test_ensure_python_fails_loudly_when_no_interpreter_can_import_agent
test was passing locally but failing on CI runners because:

1. CI runners don't have REPO_ROOT/.venv/bin/python on the filesystem
2. The function path on missing venv calls venv.EnvBuilder(with_pip=True).create()
3. That internally calls subprocess.check_output() — a different code path
   than the monkey-patched bootstrap.subprocess.run, which only stubs run().
4. CI fails with: AttributeError: NoneType has no attribute stdout

The behavior under test is "what happens when no interpreter can import
both WebUI deps and the agent" — NOT the venv-creation path. So we sidestep
EnvBuilder by setting REPO_ROOT to tmp_path with a pre-existing
.venv/bin/python file. The venv-existence check passes, EnvBuilder is
skipped, the stubbed _python_can_run_webui_and_agent returns False on the
final check, and the expected RuntimeError fires.

Co-authored-by: ccqqlo <ccqqlo@users.noreply.github.com>
This commit is contained in:
Hermes Bot
2026-05-02 19:45:54 +00:00
parent 0076f3d9ab
commit 9049d4d6b3
1 changed files with 21 additions and 0 deletions
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tests/test_bootstrap_python_selection.py
+21
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@@ -31,7 +31,28 @@ def test_ensure_python_fails_loudly_when_no_interpreter_can_import_agent(monkeyp
agent_python.parent.mkdir(parents=True)
agent_python.write_text("", encoding="utf-8")
# Pretend REPO_ROOT/.venv already exists with a python binary so the function
# skips venv.EnvBuilder.create() entirely. Without this, CI runners that
# don't have a .venv try to build one and the monkey-patched subprocess
# stub (which only covers subprocess.run, not the venv module's internal
# subprocess.check_output) fails with AttributeError on .stdout. The
# behavior under test is "what happens when no interpreter can import
# both WebUI deps and the agent", not the venv-creation path itself.
fake_venv_python = tmp_path / "fake-repo-venv-python"
fake_venv_python.write_text("", encoding="utf-8")
monkeypatch.setattr(bootstrap, "REPO_ROOT", tmp_path)
# Ensure the .venv/bin/python (or .venv/Scripts/python.exe) path resolves
# to our fake binary so .exists() returns True and EnvBuilder is skipped.
venv_subdir = tmp_path / ".venv" / "bin"
venv_subdir.mkdir(parents=True, exist_ok=True)
(venv_subdir / "python").write_text("", encoding="utf-8")
if (tmp_path / ".venv").exists(): # platform-independent guard
pass
monkeypatch.setattr(bootstrap, "_python_can_run_webui_and_agent", lambda *a, **k: False)
# Cover both subprocess.run (used for pip install) and any other subprocess
# entry points the venv module might invoke. Returning None is fine because
# we never inspect the result on this code path.
monkeypatch.setattr(bootstrap.subprocess, "run", lambda *a, **k: None)
try: