#!/bin/bash
# CHECK: verify all beam reliability primitives
#
# Runner note (Q105, 2026-10-28). This lane writes its tests in two styles:
# unittest.TestCase subclasses and bare module-level `def test_*` / `assert`.
# `python3 -m unittest discover` collects only the first -- 276 of the 407
# tests in this directory -- so a green CHECK said nothing about the other
# 131, and test_fenwick.py's 8 cells could be broken without moving the gate.
# pytest collects both styles, so pytest is the runner here.
#
# `--import-mode=importlib` is deliberate: two files share the basename
# `test_toposort.py` (this directory and toposort/), and pytest's default
# `prepend` mode aborts collection on that duplicate module name. importlib
# mode keys modules by path instead. `toposort/test_toposort.py` is a plain
# script (8 PASS lines + ALL), not a pytest module, so it keeps its own line.
#
# Exit codes follow the repo's tools/ contract: 0 clean, 1 graded a fault,
# 2 could not grade. pytest's own codes are mapped onto that contract:
#   0 -> 0            all collected tests passed
#   1 -> 1            a test failed
#   2 -> 1            collection error: a test module does not import (a fault)
#   5 -> 1            no tests collected: the gate is measuring nothing
# A missing pytest is 2, never a silent 0 -- a gate that cannot run the 131
# tests must not report success.
set -e
set -o pipefail
cd "$(dirname "$(readlink -f "$0")")"

if ! python3 -m pytest --version >/dev/null 2>&1; then
    echo "CHECK: pytest not importable -- cannot grade." >&2
    echo "CHECK: unittest discover would run 276 of 407 tests and skip 131 (Q105)." >&2
    exit 2
fi

set +e
python3 -m pytest -q -p no:cacheprovider --import-mode=importlib test_*.py
rc=$?
set -e
case $rc in
    0) ;;
    1) echo "CHECK: pytest reported failing test(s)." >&2; exit 1 ;;
    5) echo "CHECK: pytest collected no tests -- the gate is measuring nothing." >&2; exit 1 ;;
    *) echo "CHECK: pytest exited $rc -- collection or internal error (a module that will not import is a fault)." >&2; exit 1 ;;
esac

python3 toposort/test_toposort.py