#!/usr/bin/ruby -w
# test_optionparser.rb: Unit tests for the pdfmult script.
#
# Copyright (C) 2011-2012 Marcus Stollsteimer

require 'minitest/spec'
require 'minitest/autorun'
require 'pdfmult'


describe Pdfmult::Optionparser do

  it 'should return the correct default values' do
    options = Pdfmult::Optionparser.parse!(['sample.pdf'])
    expected = {
      :infile => 'sample.pdf',
      :outfile => 'sample_2.pdf',
      :number => 2,
      :pages => nil,
      :latex => false
    }
    options.must_equal expected
  end

  it 'should recognize the -n option and set the corresponding output filename' do
    options = Pdfmult::Optionparser.parse!(['sample.pdf', '-n', '4'])
    options[:outfile].must_equal 'sample_4.pdf'
    options[:number].must_equal 4
  end

  it 'should not accept invalid -n option values' do
    lambda { Pdfmult::Optionparser.parse!(['sample.pdf', '-n', '3']) }.must_raise OptionParser::InvalidArgument
  end

  it 'should recognize the -o option' do
    options = Pdfmult::Optionparser.parse!(['sample.pdf', '-o', 'outfile.pdf'])
    options[:outfile].must_equal 'outfile.pdf'
  end

  it 'should recognize the -p option' do
    options = Pdfmult::Optionparser.parse!(['sample.pdf', '-p', '4'])
    options[:pages].must_equal 4
  end

  it 'should recognize the -l option and set the corresponding output filename' do
    options = Pdfmult::Optionparser.parse!(['sample.pdf', '-l'])
    options[:outfile].must_equal 'sample_2.tex'
    options[:latex].must_equal true
  end

  it 'should only accept positive -p option values' do
    lambda { Pdfmult::Optionparser.parse!(['sample.pdf', '-p', '0.5']) }.must_raise OptionParser::InvalidArgument
    lambda { Pdfmult::Optionparser.parse!(['sample.pdf', '-p', '0']) }.must_raise OptionParser::InvalidArgument
    lambda { Pdfmult::Optionparser.parse!(['sample.pdf', '-p', '-1']) }.must_raise OptionParser::InvalidArgument
  end

  it 'should not accept wrong number of arguments' do
    lambda { Pdfmult::Optionparser.parse!(['sample.pdf', 'sample2.pdf']) }.must_raise ArgumentError
    lambda { Pdfmult::Optionparser.parse!(['']) }.must_raise ArgumentError
    lambda { Pdfmult::Optionparser.parse!([]) }.must_raise ArgumentError
  end

  it 'should not accept invalid options' do
    lambda { Pdfmult::Optionparser.parse!(['-x']) }.must_raise OptionParser::InvalidOption
  end
end