#!/usr/bin/env ruby -w
# encoding: UTF-8
#
# = test_Export-Reports.rb -- The TaskJuggler III Project Management Software
#
# Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011, 2012
#               by Chris Schlaeger <chris@linux.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#

$:.unshift File.join(File.dirname(__FILE__), '..', 'lib') if __FILE__ == $0
$:.unshift File.dirname(__FILE__)

require 'stringio'
require 'test/unit'

require 'MessageChecker'
require 'taskjuggler/TaskJuggler'
require 'taskjuggler/AlgorithmDiff'

class TaskJuggler

  class TestExportReport < Test::Unit::TestCase

    include MessageChecker

    # This function captures the $stdout output of the passed block to a String
    # and returns it.
    def captureStdout
      oldStdOut = $stdout
      $stdout = (out = StringIO.new)
      begin
        yield
      ensure
        $stdout = oldStdOut
      end
      out.string
    end

    # This functions redirects all output of the passed block to a new file with
    # the name fileName.
    def stdoutToFile(fileName)
      oldStdOut = $stdout
      $stdout = File.open(fileName, 'w')
      begin
        yield
        $stdout.close
      ensure
        $stdout = oldStdOut
      end
    end

    # Compare the output Export (passed as String in _out_) with the content of
    # the Export reference files _refFile_.
    def compareExports(out, refFile, testCase)
      ref = File.new(refFile, 'r').read

      diff = ref.extend(DiffableString).diff(out).to_s
      if diff != ''
        File.new('failed.tjp', 'w').write(out)
      end
      assert_equal('', diff, "output for #{testCase} does not match " +
                   "#{refFile}:\n#{diff}")
    end

    def checkExportReport(projectFile, repFile, refFile)
      tj = TaskJuggler.new
      assert(tj.parse([ projectFile, repFile ]),
             "Parser failed for #{projectFile}")

      # Schedule the project.
      assert(tj.schedule, "Scheduler failed for #{projectFile}")

      tj.project.reports.each do |report|
        next unless report.get('formats').include?(:tjp)

        if File.file?(refFile)
          # If there is a reference Export file for this test case, compare the
          # output against it.
          out = captureStdout do
            assert(tj.generateReport(report.fullId, false),
                   "Report generation failed for #{projectFile}")
          end
          compareExports(out, refFile, projectFile)
        else
          # If not, we generate the reference file.
          stdoutToFile(refFile) do
            assert(tj.generateReport(report.fullId, false),
                   "Reference file generation failed for #{projectFile}")
          end
        end
      end
      assert(MessageHandlerInstance.instance.messages.empty?,
             "Unexpected error in #{projectFile}")
    end

    def test_Export_Reports
      path = File.dirname(__FILE__)

      ENV['TEST1'] = 't_e_s_t_1'
      ENV['TEST2'] = '"A test String"'
      ENV['TEST3'] = '3'
      testDir = path + '/TestSuite/Syntax/Correct/'
      Dir.glob(testDir + '*.tjp').each do |f|
        # We ignore some test cases that cannot work in this setup.
        next if %w( Freeze.tjp Export.tjp ).include?(f[testDir.length..-1])

        # Take the project, schedule it, check it against the reference and
        # export it. Then check the export against the reference file.

        refFile = refFileName(f)
        repFile = reportDefFileName(f)
        checkExportReport(f, repFile, refFile)
        checkExportReport(refFile, repFile, refFile)
      end
    end

    private

    def refFileName(originalFile)
      baseDir = File.dirname(originalFile)
      baseName = File.basename(originalFile, '.tjp')
      baseDir + "/../../Export-Reports/refs/#{baseName}.tjp"
    end

    def reportDefFileName(originalFile)
      File.dirname(originalFile) + "/../../Export-Reports/export.tji"
    end

  end

end