#!/bin/sh
# Tests for skills/traceability/trace.sh.
#
# The RED run for #10 established what a forward trace costs by hand: sixteen
# commands, of which the decisive ones were reading issue comments and running a
# probe against a claim. This tool does the mechanical half — what git can prove
# — and, more importantly, states what it CANNOT prove, so an unverifiable link
# never reads as a verified one.

set -u

ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
SUT="$ROOT/skills/traceability/trace.sh"

pass=0
fail=0
WORK=${TMPDIR:-/tmp}/traceability_test.$$

if [ ! -f "$SUT" ]; then
  printf 'FAIL: %s does not exist\n' "$SUT"
  exit 1
fi

cleanup() { rm -rf "$WORK"; }
trap cleanup EXIT INT TERM

mkdir -p "$WORK/repo/tests"
cd "$WORK/repo" || exit 1
git init -q .
git config user.email t@example.com
git config user.name test
# A remote is needed for the tool to turn "#37" into a checkable URL, which is
# the point of that section.
git remote add origin https://git.d-ma.be/mathias/demo.git

printf 'baseline\n' > README.md
git add -A && git commit -qm "chore: baseline"

printf 'gate\n' > gate.sh
printf 'case\n' > tests/gate_test.sh
git add -A && git commit -qm "feat(gate): add the thing

Implements the decision recorded in #5, filed as #37.

Closes #37"
SHA=$(git rev-parse --short HEAD)
git tag -a v1.2.0 -m "release v1.2.0"

printf 'more\n' >> gate.sh
git add -A && git commit -qm "chore: later work"

cd - >/dev/null || exit 1
out=$(sh "$SUT" "$SHA" "$WORK/repo" 2>&1)

check() {
  if printf '%s' "$out" | grep -q "$1"; then
    pass=$((pass + 1)); printf '  ok   %s\n' "$2"
  else
    fail=$((fail + 1)); printf '  FAIL %s\n       output had no %s\n%s\n' "$2" "$1" "$out"
  fi
}

check '#5'              'lists every issue the commit references, not just the closing one'
check '#37'             'lists the closing reference'
check 'tests/gate_test.sh' 'names the test files the commit touched'
check 'v1.2.0'          'names the release that contains it'
check 'Cannot verify' 'states what it could not verify'
check 'issues/37'       'emits a checkable URL for the tracker link it cannot follow'

# A commit in no release must say so — "no tag" and "not checked" are different
# answers and only one of them is about the commit.
last=$(git -C "$WORK/repo" rev-parse --short HEAD)
out=$(sh "$SUT" "$last" "$WORK/repo" 2>&1)
if printf '%s' "$out" | grep -qi 'no release contains'; then
  pass=$((pass + 1)); printf '  ok   an unreleased commit is reported as unreleased\n'
else
  fail=$((fail + 1)); printf '  FAIL an unreleased commit is reported as unreleased\n%s\n' "$out"
fi

printf '\ntraceability: %d passed, %d failed\n' "$pass" "$fail"
[ "$fail" -eq 0 ]