#!/usr/bin/env bash
#
# Tests for the release script, in throwaway git repositories.
#
# These paths only occur at moments you cannot stage by hand — a repository with
# no tags, a range that asks for no release, a version whose patch number is
# already two digits — and getting them wrong publishes a wrong version or no
# release at all. Run with:  bash .gitea/scripts/release.test.sh

set -euo pipefail

HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
RELEASE="$HERE/release.sh"
PASS=0
FAIL=0

# A fresh repository with one commit, optionally tagged.
new_repo() {
  local dir
  dir="$(mktemp -d)"
  cd "$dir"
  git init -q
  git config user.email test@example.com
  git config user.name Test
  printf '{\n  "name": "thing",\n  "version": "%s"\n}\n' "${1:-0.1.0}" > package.json
  git add -A
  git commit -qm "Scaffold the thing"
  echo "$dir"
}

commit() {
  git commit -q --allow-empty -m "$1"
}

tag() {
  git tag "$1"
}

check() {
  local label="$1" expected="$2" actual="$3"
  if [ "$expected" = "$actual" ]; then
    PASS=$((PASS + 1))
    printf '  ok   %s\n' "$label"
  else
    FAIL=$((FAIL + 1))
    printf '  FAIL %s\n       expected: %s\n       actual:   %s\n' "$label" "$expected" "$actual"
  fi
}

check_contains() {
  local label="$1" needle="$2" haystack="$3"
  if printf '%s' "$haystack" | grep -qF -- "$needle"; then
    PASS=$((PASS + 1))
    printf '  ok   %s\n' "$label"
  else
    FAIL=$((FAIL + 1))
    printf '  FAIL %s\n       missing: %s\n       in:      %s\n' "$label" "$needle" "$haystack"
  fi
}

check_absent() {
  local label="$1" needle="$2" haystack="$3"
  if printf '%s' "$haystack" | grep -qF -- "$needle"; then
    FAIL=$((FAIL + 1))
    printf '  FAIL %s\n       should not contain: %s\n' "$label" "$needle"
  else
    PASS=$((PASS + 1))
    printf '  ok   %s\n' "$label"
  fi
}

echo "semver arithmetic"
check "patch"        "0.1.1" "$(bash "$RELEASE" apply-bump 0.1.0 patch)"
check "minor"        "0.2.0" "$(bash "$RELEASE" apply-bump 0.1.5 minor)"
check "major"        "1.0.0" "$(bash "$RELEASE" apply-bump 0.9.9 major)"
check "patch to 10"  "0.1.10" "$(bash "$RELEASE" apply-bump 0.1.9 patch)"
check "minor to 10"  "0.10.0" "$(bash "$RELEASE" apply-bump 0.9.3 minor)"
check "prerelease"   "0.1.1" "$(bash "$RELEASE" apply-bump 0.1.0-rc.1 patch)"

echo
echo "first release with no tags"
new_repo 0.2.0 >/dev/null
check "version is the declared one" "0.2.0" "$(bash "$RELEASE" next-version patch)"
check "no tag yet"                  ""      "$(bash "$RELEASE" last-tag)"
cd /; 

echo
echo "subsequent releases move forward from the tag"
new_repo 0.1.0 >/dev/null
tag v0.1.3
check "patch"  "0.1.4" "$(bash "$RELEASE" next-version patch)"
check "minor"  "0.2.0" "$(bash "$RELEASE" next-version minor)"
check "major"  "1.0.0" "$(bash "$RELEASE" next-version major)"
commit "Fix the thing"
check "bump defaults to patch"    "patch" "$(bash "$RELEASE" bump "v0.1.3..HEAD")"
commit "Add a capability [minor]"
check "marker raises the bump"    "minor" "$(bash "$RELEASE" bump "v0.1.3..HEAD")"
check "and the version follows"   "0.2.0" "$(bash "$RELEASE" next-version "$(bash "$RELEASE" bump "v0.1.3..HEAD")")"
commit "Rewrite everything [major]"
check "major outranks minor"      "major" "$(bash "$RELEASE" bump "v0.1.3..HEAD")"
cd /;

echo
echo "skip release"
new_repo 0.1.0 >/dev/null
tag v0.1.0
commit "Update the README [skip release]"
check "skip is detected"          "yes" "$(bash "$RELEASE" wants-skip "v0.1.0..HEAD")"
check_absent "skipped work is not in the notes" "Update the README" "$(bash "$RELEASE" notes "v0.1.0..HEAD")"
commit "Fix a real bug"
check "a later real change does not un-skip" "yes" "$(bash "$RELEASE" wants-skip "v0.1.0..HEAD")"
check "so nothing is released"              "no"  "$(bash "$RELEASE" should-release "v0.1.0..HEAD")"
cd /;

echo
echo "notes only cover the range"
new_repo 0.1.0 >/dev/null
tag v0.1.0
commit "Fix the leaked handle"
commit "Add the status card"
NOTES="$(bash "$RELEASE" notes "v0.1.0..HEAD")"
check_contains "includes the new work"  "Add the status card" "$NOTES"
check_contains "includes the fix"       "Fix the leaked handle" "$NOTES"
check_absent   "excludes released work" "Scaffold the thing" "$NOTES"
check "a range with real work releases" "yes" "$(bash "$RELEASE" should-release "v0.1.0..HEAD")"
cd /;

echo
echo "conventional commits are grouped, plain ones are not"
new_repo 0.1.0 >/dev/null
tag v0.1.0
commit "feat: add the release workflow"
commit "fix: stop the runner tagging twice"
commit "docs: explain the markers"
NOTES="$(bash "$RELEASE" notes "v0.1.0..HEAD")"
check_contains "grouped heading"  "### Added" "$NOTES"
check_contains "grouped fix"      "### Fixed" "$NOTES"
check_contains "prefix stripped"  "- add the release workflow" "$NOTES"
check_absent   "no raw prefix"    "feat: add" "$NOTES"
cd /;

echo
new_repo 0.1.0 >/dev/null
tag v0.1.0
commit "Background only the warm-up, and use the framework's own parameter name"
commit "Make the settings card behave like the other cards"
NOTES="$(bash "$RELEASE" notes "v0.1.0..HEAD")"
check_absent "prose commits get no invented headings" "### Added" "$NOTES"
check_contains "and stay as bullets" "- Make the settings card behave" "$NOTES"
cd /;

echo
echo "an empty range says so rather than printing nothing"
new_repo 0.1.0 >/dev/null
tag v0.1.0
check "empty range" "_No changes._" "$(bash "$RELEASE" notes "v0.1.0..HEAD")"
# The release commit is itself a push to master; without this the next run would
# publish a release describing nothing.
check "an empty range releases nothing" "no" "$(bash "$RELEASE" should-release "v0.1.0..HEAD")"
cd /;

echo
printf 'passed %d, failed %d\n' "$PASS" "$FAIL"
[ "$FAIL" -eq 0 ]