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feat(cpg): add an explicit environment switch for the engine session (M2 11.3)

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A measured run needs to enable the transport without changing any default. The
switch reads as enabled only for the exact value "1"; unset, empty, "0", "true"
and anything else leave the disposable path in place, and an explicit constructor
argument still wins in both directions.

1,396 tests passed, nine skipped.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01EmM1j46qgKMh3zqD1QMwEo
This commit is contained in:
Marius Ciepluch
2026-09-16 20:43:50 +02:00
co-authored by Claude Opus 5
parent 87f7976a58
commit fc69055a32
2 changed files with 20 additions and 1 deletions
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tests/test_cpg_session.py
+15
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@@ -263,3 +263,18 @@ def _completed(stdout):
import subprocess
return subprocess.CompletedProcess(["joern"], 0, stdout, "")
def test_the_session_switch_is_explicit_and_defaults_off(monkeypatch):
"""M2 11.3: a measured run can enable the transport without changing any default."""
from openultrasast.cpg.backend import SESSION_ENV, JoernBackend
monkeypatch.delenv(SESSION_ENV, raising=False)
assert JoernBackend().session_transport is False
for value in ("", "0", "true", "yes", "2"):
monkeypatch.setenv(SESSION_ENV, value)
assert JoernBackend().session_transport is False, value
monkeypatch.setenv(SESSION_ENV, "1")
assert JoernBackend().session_transport is True
# An explicit argument still wins over the environment in both directions.
assert JoernBackend(session_transport=False).session_transport is False