#!/usr/bin/env bats

load test_helper

# Each test runs the real update script from a fake CoreDesktop checkout in the
# test's HOME, with fake hooks in updates.d/ that log to $RAN when they run.

setup() {
  # A checkout with nothing but the update script and the files it installs
  common_setup
  CD="$HOME/.local/share/coredesktop"
  mkdir -p "$CD/updates.d" "$HOME/.local/bin"
  cp "$REPO/update" "$CD/update"
  for script in refresh sibling version configure audit; do
    echo '#!/bin/bash' > "$CD/$script"
  done

  export RAN="$BATS_TEST_TMPDIR/ran"
  unset UPDATE_REEXECED UPDATE_PULL_FAILED UPDATE_FORCE

  stub clear
  stub git 'exit "${GIT_STATUS:-0}"'
  stub sudo 'exit "${SUDO_STATUS:-0}"'
  stub df 'printf "Avail\n%s\n" "${DF_AVAIL:-104857600}"'
  # Let go of bats' output pipes so the sudo keepalive's leftover sleep
  # doesn't keep the test waiting
  stub sleep 'exec > /dev/null 2>&1 3>&-; exec /usr/bin/sleep "$@"'
}

# hook NAME BODY: add updates.d/NAME.sh with BODY as its run_update
hook() {
  printf '#!/bin/bash\nrun_update() {\n%s\n}\n' "$2" > "$CD/updates.d/$1.sh"
}

ran() {
  [ "$(cat "$RAN" 2> /dev/null)" = "$(printf '%s\n' "$@")" ]
}

@test "update pulls, installs its scripts, and runs every hook in order" {
  hook 20-b 'echo b >> "$RAN"'
  hook 10-a 'echo a >> "$RAN"'

  run "$CD/update"
  [ "$status" -eq 0 ]
  [[ "$output" == *"Done."* ]]
  called git -C "$CD" pull --ff-only
  ran a b
  for script in update refresh sibling version configure audit; do
    [ -x "$HOME/.local/bin/$script" ]
  done
}

@test "update pulls only once, before re-running its new copy" {
  hook 10-a 'echo a >> "$RAN"'

  run "$CD/update"
  [ "$status" -eq 0 ]
  [ "$(grep -c '^git ' "$STUB_LOG")" -eq 1 ]
  ran a
}

@test "a failing hook doesn't stop the hooks after it" {
  hook 10-a 'echo a >> "$RAN"'
  hook 20-b 'echo b >> "$RAN"; return 1'
  hook 30-c 'echo c >> "$RAN"'

  run "$CD/update"
  [ "$status" -eq 1 ]
  [[ "$output" == *"Done, with errors in: 20-b.sh"* ]]
  ran a b c
}

@test "a hook that exits doesn't end the update" {
  hook 10-a 'echo a >> "$RAN"; exit 0'
  hook 20-b 'echo b >> "$RAN"'

  run "$CD/update"
  [ "$status" -eq 0 ]
  ran a b
}

@test "a hook using set -e fails at its first failing command" {
  hook 10-a 'set -e; echo a >> "$RAN"; false; echo after >> "$RAN"'
  hook 20-b 'echo b >> "$RAN"'

  run "$CD/update"
  [ "$status" -eq 1 ]
  [[ "$output" == *"errors in: 10-a.sh"* ]]
  ran a b
}

@test "a hook's is_installed and functions don't leak into the next hook" {
  printf '%s\n' '#!/bin/bash' 'is_installed() { false; }' \
    'run_update() { echo a >> "$RAN"; }' > "$CD/updates.d/10-a.sh"
  # 10-a's is_installed must not stop 20-b, and its run_update must not run
  # again for 30-c, which has none
  printf '%s\n' '#!/bin/bash' 'run_update() { echo b >> "$RAN"; }' \
    > "$CD/updates.d/20-b.sh"
  printf '%s\n' '#!/bin/bash' 'true' > "$CD/updates.d/30-c.sh"

  run "$CD/update"
  [ "$status" -eq 0 ]
  ran b
}

@test "update runs the hooks on disk when git pull fails, and reports it" {
  export GIT_STATUS=1
  hook 10-a 'echo a >> "$RAN"'

  run "$CD/update"
  [ "$status" -eq 1 ]
  [[ "$output" == *"could not pull"* ]]
  [[ "$output" == *"errors in: git pull"* ]]
  ran a
}

@test "update stops before any hook when / is low on space" {
  export DF_AVAIL=1048576
  hook 10-a 'echo a >> "$RAN"'

  run "$CD/update"
  [ "$status" -eq 1 ]
  [[ "$output" == *"needs at least 10 GiB"* ]]
  [ ! -e "$RAN" ]
}

@test "UPDATE_FORCE skips the free space check" {
  export DF_AVAIL=1048576 UPDATE_FORCE=1
  hook 10-a 'echo a >> "$RAN"'

  run "$CD/update"
  [ "$status" -eq 0 ]
  ran a
}

@test "update stops when sudo fails" {
  export SUDO_STATUS=1
  hook 10-a 'echo a >> "$RAN"'

  run "$CD/update"
  [ "$status" -eq 1 ]
  [ ! -e "$RAN" ]
}