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# Copyright 2008 Sun Microsystems, Inc. All rights reserved.
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# Portions Copyrighted 2008 Sun Microsystems, Inc.
 
require 'test/unit'
require 'test/unit/testcase'
require 'test/unit/testsuite'
require 'test/unit/ui/testrunnermediator'
require 'getoptlong'
require 'rubygems'
require 'rake'

class NbTestMediator

  def parse_args
    @suites = []

    parser = GetoptLong.new
    parser.set_options(
      ["-f", "--file", GetoptLong::OPTIONAL_ARGUMENT],
      ["-d", "--directory", GetoptLong::OPTIONAL_ARGUMENT],
      ["-m", "--testmethod", GetoptLong::OPTIONAL_ARGUMENT]
    )
    
    loop do
      begin
        opt, arg = parser.get
        break if not opt
        case opt
        # single file
        when "-f"
          add_to_suites [arg]
        # directory
        when "-d"
          add_to_suites Rake::FileList["#{arg}/**/test*.rb", "#{arg}/**/*test.rb"]
        # single test method
        when "-m"
          if "-m" != ""
            @suites.each do |s| 
              tests_to_delete = []
              s.tests.each do |t|
                unless t.method_name == arg 
                  tests_to_delete << t
                end
              end
              tests_to_delete.each do |t|
                s.delete(t)
              end
            end
          end
        end
      end
    end
  end

  def require_file file
    begin
      file_name = file[0..file.length - 4]
      require "#{file_name}"
    rescue => err
      puts "%TEST_LOGGER% level=WARNING msg=Failed to load #{file}, error=#{err}"
      raise err
    end
  end

  def add_to_suites files
    t1 = Time.now
    # collect classes that extend TestCase/Suite before loading the files we are going to test
    # TODO: possibly not needed
    original_testcase_subclasses = Array.new(Test::Unit::TestCase::SUBCLASSES)
    original_testsuite_subclasses = Array.new(Test::Unit::TestSuite::SUBCLASSES)

    t2 = Time.now
    files.each do |file|
      require_file file
    end
    puts "%TEST_LOGGER% level=FINE msg=Loading #{files.size} files took #{Time.now - t2}"
    
    # we are interested only in test cases / suites we just loaded
    testcase_subclasses = Test::Unit::TestCase::SUBCLASSES - original_testcase_subclasses
    testsuite_subclasses = Test::Unit::TestSuite::SUBCLASSES - original_testsuite_subclasses
    
    # collect ancestors
    testcase_ancestors = []
    testcase_subclasses.each do |testcase|
      testcase_ancestors += testcase.ancestors.reject do |ancestor|  
        ancestor == testcase
      end
    end
    
    testsuite_ancestors = []
    testsuite_subclasses.each do |testsuite|
      testsuite_ancestors += testsuite.ancestors.reject do |ancestor|  
        ancestor == testsuite
      end
    end
    
    # reject test cases / suites that have subclasses (its test
    # are run when the subclass is run)
    testcase_subclasses.reject! do |testcase|
      testcase_ancestors.include?(testcase)
    end
    testsuite_subclasses.reject! do |testsuite|
      testsuite_ancestors.include?(testsuite)
    end
    
    # collects suites 
    testcase_subclasses.each do |testcase|
      @suites << testcase.suite
    end
    testsuite_subclasses.each do |testsuite|
      @suites << testsuite
    end
    
    # reject suites that contain no tests or only the default test. prevents
    # running of base test classes that are not used
    @suites.reject! do |suite|
      if suite.empty?
        true
      elsif suite.tests.length == 1
        "default_test(#{suite})" == (suite.tests[0].name)
      else         
        false
      end
    end
    
   puts "%TEST_LOGGER% level=FINE msg=Collected #{@suites.size} suites in #{Time.now - t1}"

  end

  def run_mediator
    parse_args
    
    @suites.each do |suite|
      @mediator = Test::Unit::UI::TestRunnerMediator.new(suite)
      attach_listeners
      start_suite_timer
      begin
        puts "%SUITE_STARTING% #{suite}"
        result = @mediator.run_suite
        puts "%SUITE_SUCCESS% #{result.passed?}"
        puts "%SUITE_FAILURES% #{result.failure_count}"
        puts "%SUITE_ERRORS% #{result.error_count}"
      rescue => err
        puts "%SUITE_ERROR_OUTPUT% error=#{err}"
      ensure
        puts "%SUITE_FINISHED% time=#{elapsed_suite_time}"
      end
    end

  end
  
  def start_suite_timer
    @suite_start_time = Time.now
  end
  
  def elapsed_suite_time
    Time.now - @suite_start_time
  end
  def attach_listeners
    @mediator.add_listener(Test::Unit::UI::TestRunnerMediator::STARTED, &method(:suite_started))
    @mediator.add_listener(Test::Unit::UI::TestRunnerMediator::FINISHED, &method(:suite_finished))
    @mediator.add_listener(Test::Unit::TestResult::CHANGED, &method(:test_result_changed))
    @mediator.add_listener(Test::Unit::TestResult::FAULT, &method(:test_fault))
    @mediator.add_listener(Test::Unit::TestCase::STARTED, &method(:test_started))
    @mediator.add_listener(Test::Unit::TestCase::FINISHED, &method(:test_finished))
  end
  
  def test_fault(result)
    if (result.instance_of?(Test::Unit::Failure))
      puts "%TEST_FAILED% time=#{elapsed_time} testname=#{result.test_name} message=#{result.message.to_s.gsub($/, " ")} location=#{result.location}"
    else
      stacktrace = result.exception.backtrace.join("%BR%")
      puts "%TEST_ERROR% time=#{elapsed_time} testname=#{result.test_name} message=#{result.message.to_s.gsub($/, " ")} location=#{stacktrace}"
    end
  end
  
  def test_result_changed(result)
    puts "%TEST_RESULT_CHANGED% #{result}"
  end
  
  def suite_started(result)
    puts "%SUITE_STARTED% #{result}"
  end

  def suite_finished(result)
    # handled in the main loop that runs suites
    # puts "%SUITE_FINISHED% time=#{result}"
  end
  
  def test_started(result)
    start_timer
    puts "%TEST_STARTED% #{result}"
  end

  def test_finished(result)
    puts "%TEST_FINISHED% time=#{elapsed_time} #{result}"
  end
  
  def start_timer
    @start_time = Time.now
  end
  
  def elapsed_time
    Time.now - @start_time
  end
end

module Test
  module Unit
    class TestCase
      SUBCLASSES = []
      class << self
        alias_method :nb_mediator_existing_inherited, :inherited unless
          instance_methods.include?("nb_mediator_existing_inherited")
        def inherited(subclass)
          nb_mediator_existing_inherited(subclass)
          SUBCLASSES << subclass
          super
        end
      end
    end
  end
end

module Test
  module Unit
    class TestSuite
      SUBCLASSES = []
      class << self
        alias_method :nb_mediator_existing_inherited, :inherited unless 
          instance_methods.include?("nb_mediator_existing_inherited")
        def inherited(subclass)
          nb_mediator_existing_inherited(subclass)
          SUBCLASSES << subclass
          super
        end
      end
    end
  end
end
  
NbTestMediator.new.run_mediator