Class: Shellfish::Application

Inherits:
Object
  • Object
show all
Defined in:
lib/shellfish/application.rb

Instance Method Summary collapse

Constructor Details

#initialize(argv) ⇒ Application

Returns a new instance of Application.



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# File 'lib/shellfish/application.rb', line 13

def initialize(argv)
  @argv   = argv
  if @argv.empty?
    @argv = [File.expand_path('../../examples/fizzbuzz.rb', File.dirname(__FILE__))]
  end
  @loader = ProblemLoader.new
  @differ = RSpec::Expectations::Differ.new
end

Instance Method Details

#on_ng(problem, input, output) ⇒ Object 



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# File 'lib/shellfish/application.rb', line 74

def on_ng(problem, input, output)
  puts "<red>NG</red>".termcolor
  puts
  show_diff output, problem.expected_result
end

#on_ok(problem, input, output) ⇒ Object

Raises:



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# File 'lib/shellfish/application.rb', line 65

def on_ok(problem, input, output)
  puts "<green>OK</green>".termcolor
  puts
  show_string output
  puts "<green>Congratulations!</green>".termcolor
  puts
  raise NextProblemException
end

#on_quit ⇒ Object

Raises:



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# File 'lib/shellfish/application.rb', line 85

def on_quit
  raise QuitException
end

#on_show_problem(problem) ⇒ Object

Raises:



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# File 'lib/shellfish/application.rb', line 89

def on_show_problem(problem)
  show_problem problem
  raise SkipEvaluationException
end

#on_skip ⇒ Object

Raises:



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# File 'lib/shellfish/application.rb', line 80

def on_skip
  puts "<yellow>Skipped</yellow>".termcolor
  raise NextProblemException
end

#play ⇒ Object 



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# File 'lib/shellfish/application.rb', line 30

def play
  @problem_count = @argv.size
  @current_count = 1
  @argv.each do |file|
    try_problem @loader.load(file)
    @current_count += 1
  end
rescue QuitException
  puts "Quitting shellfish..."
ensure
  puts "Good bye."
end

#show_diff(output, expected) ⇒ Object 



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# File 'lib/shellfish/application.rb', line 94

def show_diff(output, expected)
  diff = @differ.diff_as_string(output, expected).gsub(/^\n+/, '')
  colored_diff = ''
  diff.each_line do |line|
    if line[0] == '@'
      colored_diff += "<green><bold>#{line}</bold></green>".termcolor
    elsif line[0] == '+'
      colored_diff += "<blue><bold>#{line}</bold></blue>".termcolor
    elsif line[0] == '-'
      colored_diff += "<red><bold>#{line}</bold></red>".termcolor
    else
      colored_diff += line
    end
  end
  show_string colored_diff
end

#show_problem(problem) ⇒ Object 



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# File 'lib/shellfish/application.rb', line 111

def show_problem(problem)
  puts ("<blue>Problem</blue> (#{@current_count}/#{@problem_count}): " +
        "<bold>#{problem.subject}</bold>").termcolor
  puts "Description: #{problem.description}" if problem.desc?
  puts
  puts "<bold>Expected Result:</bold>".termcolor
  show_string "<cyan>#{problem.expected_result}</cyan>".termcolor
  puts
end

#show_string(string) ⇒ Object 



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# File 'lib/shellfish/application.rb', line 121

def show_string(string)
  puts "-" * 72
  print string
  puts
  puts "-" * 72
end

#start ⇒ Object 



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# File 'lib/shellfish/application.rb', line 22

def start
  opt = OptionParser.new
  opt.version = VERSION

  opt.parse!(@argv)
  play
end

#try_problem(problem) ⇒ Object 



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# File 'lib/shellfish/application.rb', line 43

def try_problem(problem)
  show_problem(problem)
  while input = ::Readline.readline('shellfish $ ', true)
    begin
    on_skip if input =~ /^\s*:(?:skip|next)\s*$/
    on_quit if input =~ /^\s*(?::?exit|:quit)\s*$/
    on_show_problem(problem) if input =~ /^\s*:show\s*$/

    output = `#{input}`
    if problem.expected_result != output
      on_ng problem, input, output
    else
      on_ok problem, input, output
    end
    puts
    rescue NextProblemException
      break
    rescue SkipEvaluationException
    end
  end
end