#!/usr/bin/env zsh
# -------------------------------------------------------------------------------------------------
# Copyright (c) 2010-2015 zsh-syntax-highlighting contributors
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification, are permitted
# provided that the following conditions are met:
#
#  * Redistributions of source code must retain the above copyright notice, this list of conditions
#    and the following disclaimer.
#  * Redistributions in binary form must reproduce the above copyright notice, this list of
#    conditions and the following disclaimer in the documentation and/or other materials provided
#    with the distribution.
#  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
#    may be used to endorse or promote products derived from this software without specific prior
#    written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# -------------------------------------------------------------------------------------------------
# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
# vim: ft=zsh sw=2 ts=2 et
# -------------------------------------------------------------------------------------------------


# Check an highlighter was given as argument.
[[ -n "$1" ]] || {
  echo >&2 "Bail out! You must provide the name of a valid highlighter as argument."
  exit 2
}

# Check the highlighter is valid.
[[ -f ${0:h:h}/highlighters/$1/$1-highlighter.zsh ]] || {
  echo >&2 "Bail out! Could not find highlighter ${(qq)1}."
  exit 2
}

# Check the highlighter has test data.
[[ -d ${0:h:h}/highlighters/$1/test-data ]] || {
  echo >&2 "Bail out! Highlighter ${(qq)1} has no test data."
  exit 2
}

# Load the main script.
. ${0:h:h}/zsh-syntax-highlighting.zsh

# Activate the highlighter.
ZSH_HIGHLIGHT_HIGHLIGHTERS=($1)

# Runs a highlighting test
# $1: data file
run_test_internal() {
  local -a highlight_zone
  local unused_highlight='bg=red,underline' # a style unused by anything else, for tests to use

  local tests_tempdir="$1"; shift
  local srcdir="$PWD"
  builtin cd -q -- "$tests_tempdir" || { echo >&2 "Bail out! cd failed: $?"; return 1 }

  echo -n "# ${1:t:r}: "

  # Load the data and prepare checking it.
  PREBUFFER= BUFFER= ;
  . "$srcdir"/"$1"

  # Check the data declares $PREBUFFER or $BUFFER.
  [[ -z $PREBUFFER && -z $BUFFER ]] && { echo >&2 "Bail out! Either 'PREBUFFER' or 'BUFFER' must be declared and non-blank"; return 1; }

  # Measure the time taken by _zsh_highlight.
  TIMEFMT="%*Es"
  time (BUFFER="$BUFFER" && _zsh_highlight)
}

run_test() {
  # Do not combine the declaration and initialization: «local x="$(false)"» does not set $?.
  local __tests_tempdir
  __tests_tempdir="$(mktemp -d)" && [[ -d $__tests_tempdir ]] || {
    echo >&2 "Bail out! mktemp failed"; return 1
  }
  typeset -r __tests_tempdir # don't allow tests to override the variable that we will 'rm -rf' later on

  {
    (run_test_internal "$__tests_tempdir" "$@")
  } always {
    rm -rf -- "$__tests_tempdir"
  }
}

# Process each test data file in test data directory.
for data_file in ${0:h:h}/highlighters/$1/test-data/*.zsh; do
  run_test "$data_file"
  (( $pipestatus[1] )) && exit 2
done

exit 0