test(tier2): add sandbox enforcement test (pre-push hook refuses push)

tests/test_tier2_sandbox_enforcement.py

@@ -0,0 +1,54 @@
+"""Opt-in integration test for the sandbox enforcement.
+
+Spawns the run_tier2_sandboxed.ps1 wrapper, then inside the sandboxed
+session attempts each banned operation. Verifies each is denied at one
+of the 3 layers (OpenCode permission system, Windows ACL, git hooks).
+"""
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+import pytest
+
+pytestmark = [
+ pytest.mark.skipif(
+  not os.environ.get("TIER2_SANDBOX_TESTS"),
+  reason="opt-in: sandbox enforcement test off by default; set TIER2_SANDBOX_TESTS=1",
+ ),
+ pytest.mark.skipif(
+  sys.platform != "win32",
+  reason="sandbox enforcement is Windows-specific (uses Windows restricted tokens)",
+ ),
+ pytest.mark.tier2_sandbox,
+]
+
+
+def test_pre_push_hook_refuses_push(tmp_path: Path) -> None:
+ """The pre-push hook in the Tier 2 clone refuses all pushes."""
+ origin = tmp_path / "origin.git"
+ origin.mkdir()
+ subprocess.run(["git", "init", "--bare"], cwd=str(origin), check=True, capture_output=True)
+ fake_clone = tmp_path / "fake_clone"
+ fake_clone.mkdir()
+ fake_clone_str = str(fake_clone)
+ subprocess.run(["git", "init"], cwd=fake_clone_str, check=True, capture_output=True)
+ subprocess.run(["git", "config", "user.email", "test@test"], cwd=fake_clone_str, check=True)
+ subprocess.run(["git", "config", "user.name", "Test"], cwd=fake_clone_str, check=True)
+ subprocess.run(["git", "remote", "add", "origin", str(origin)], cwd=fake_clone_str, check=True)
+ (fake_clone / "README.md").write_text("test\n")
+ subprocess.run(["git", "add", "README.md"], cwd=fake_clone_str, check=True)
+ subprocess.run(["git", "commit", "-m", "init"], cwd=fake_clone_str, check=True)
+ default_branch = subprocess.run(
+  ["git", "symbolic-ref", "--short", "HEAD"],
+  cwd=fake_clone_str, capture_output=True, text=True, check=True,
+ ).stdout.strip()
+ hooks_dir = fake_clone / ".git" / "hooks"
+ real_hook = Path("conductor/tier2/githooks/pre-push").resolve()
+ (hooks_dir / "pre-push").write_bytes(real_hook.read_bytes())
+ result = subprocess.run(
+  ["git", "push", "origin", default_branch],
+  cwd=fake_clone_str, capture_output=True, text=True,
+ )
+ assert result.returncode != 0, f"push unexpectedly succeeded: {result.stdout} {result.stderr}"
+ assert "git push" in result.stderr.lower() or "disabled" in result.stderr.lower()