#!/bin/sh

die () { echo "$@" ; cleanup ; exit 1; }

cleanup() {
  unset -f install_nvm_from_git install_nvm_as_script nvm_detect_profile nvm_has
  unset -f setup cleanup die assert_install
  unset NVM_ENV METHOD PROFILE
  rm -rf "${TMPDIR_FOR_TEST-}" 2>/dev/null
}

setup() {
  NVM_ENV=testing \. ../../install.sh

  # Mock installation functions to do nothing
  install_nvm_from_git() { :; }
  install_nvm_as_script() { :; }

  # Mock nvm_has to return true for git
  nvm_has() {
    case "$1" in
      git) return 0 ;;
      *) return 1 ;;
    esac
  }

  nvm_detect_profile() {
    echo "${TEST_PROFILE}"
  }
}

TMPDIR_FOR_TEST="$(mktemp -d)"
TEST_PROFILE="${TMPDIR_FOR_TEST}/.bashrc"
mkdir -p "${TMPDIR_FOR_TEST}/nvm"
: > "${TMPDIR_FOR_TEST}/nvm/nvm.sh"

# `nvm_do_install` unsets every `nvm_` function when it finishes, so each run sources the installer and mocks afresh.
# args: the profile's content, then the message the install must print about it
assert_install() {
  setup
  printf '%s\n' "$1" > "${TEST_PROFILE}"
  OUTPUT="$(PROFILE='' METHOD='' NVM_DIR="${TMPDIR_FOR_TEST}/nvm" nvm_do_install 2>&1)"
  case "${OUTPUT}" in
    *"$2"*) ;;
    *) die "with a profile of >$1<, expected >$2<; got >${OUTPUT}<" ;;
  esac
}

TAB="$(printf '\t')"

# a commented-out line loads nothing, however it is indented
assert_install '# [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"' 'Appending nvm source string'
assert_install '  # [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"' 'Appending nvm source string'
assert_install "${TAB}"'# [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"' 'Appending nvm source string'

# an active line still counts, indented or not
assert_install '[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"' 'nvm source string already in'
assert_install '  [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"' 'nvm source string already in'

# the same for the bash_completion line
assert_install '  # [ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"' 'Appending bash_completion source string'

cleanup