# tc_menu.rb
#
#  Created by Gregory Thomas Brown on 2005-05-10.
#  Copyright 2005. All rights reserved.
#
#  This is Free Software. See LICENSE and COPYING for details.

require "test/unit"

require "highline"
require "stringio"

class TestMenu < Test::Unit::TestCase
  def setup
    @input    = StringIO.new
    @output   = StringIO.new
    @terminal = HighLine.new(@input, @output)
  end

  def test_choices
    @input << "2\n"
    @input.rewind

    output = @terminal.choose do |menu|
      menu.choices("Sample1", "Sample2", "Sample3")
    end
    assert_equal("Sample2", output)
  end

  def test_flow
    @input << "Sample1\n"
    @input.rewind

    @terminal.choose do |menu|
      # Default:  menu.flow = :rows
      
      menu.choice "Sample1" 
      menu.choice "Sample2" 
      menu.choice "Sample3" 
    end
    assert_equal("1. Sample1\n2. Sample2\n3. Sample3\n?  ", @output.string)

    @output.truncate(@output.rewind)
    @input.rewind
    
    @terminal.choose do |menu|
      menu.flow = :columns_across
      
      menu.choice "Sample1" 
      menu.choice "Sample2" 
      menu.choice "Sample3"
    end
    assert_equal("1. Sample1  2. Sample2  3. Sample3\n?  ", @output.string)

    @output.truncate(@output.rewind)
    @input.rewind

    @terminal.choose do |menu|
      menu.flow  = :inline
      menu.index = :none

      menu.choice "Sample1" 
      menu.choice "Sample2" 
      menu.choice "Sample3"  
    end
    assert_equal("Sample1, Sample2 or Sample3?  ", @output.string)
  end

  def test_help
    @input << "help\nhelp load\nhelp rules\nhelp missing\n"
    @input.rewind

    4.times do
      @terminal.choose do |menu|
        menu.shell = true

        menu.choice(:load, "Load a file.")
        menu.choice(:save, "Save data in file.")
        menu.choice(:quit, "Exit program.")
        
        menu.help("rules", "The rules of this system are as follows...")
      end
    end
    assert_equal( "1. load\n2. save\n3. quit\n4. help\n?  " +
                  "This command will display helpful messages about " +
                  "functionality, like this one.  To see the help for a " +
                  "specific topic enter:\n" +
                  "\thelp [TOPIC]\n" +
                  "Try asking for help on any of the following:\n" +
                  "\nload   quit   rules  save \n" + 
                  "1. load\n2. save\n3. quit\n4. help\n?  " +
                  "= load\n\n" + 
                  "Load a file.\n" +
                  "1. load\n2. save\n3. quit\n4. help\n?  " +
                  "= rules\n\n" +
                  "The rules of this system are as follows...\n" +
                  "1. load\n2. save\n3. quit\n4. help\n?  " +
                  "= missing\n\n" + 
                  "There's no help for that topic.\n", @output.string )
  end

  def test_index
    @input << "Sample1\n"
    @input.rewind

    @terminal.choose do |menu|
      # Default:  menu.index = :number
      
      menu.choice "Sample1" 
      menu.choice "Sample2" 
      menu.choice "Sample3" 
    end
    assert_equal("1. Sample1\n2. Sample2\n3. Sample3\n?  ", @output.string)

    @output.truncate(@output.rewind)
    @input.rewind
    
    @terminal.choose do |menu|
      menu.index        = :letter
      menu.index_suffix = ") "
      
      menu.choice "Sample1" 
      menu.choice "Sample2" 
      menu.choice "Sample3"
    end
    assert_equal("a) Sample1\nb) Sample2\nc) Sample3\n?  ", @output.string)

    @output.truncate(@output.rewind)
    @input.rewind

    @terminal.choose do |menu|
      menu.index = :none

      menu.choice "Sample1" 
      menu.choice "Sample2" 
      menu.choice "Sample3"  
    end
    assert_equal("Sample1\nSample2\nSample3\n?  ", @output.string)

    @output.truncate(@output.rewind)
    @input.rewind
    
    @terminal.choose do |menu|
      menu.index        = "*"

      menu.choice "Sample1"
      menu.choice "Sample2"
      menu.choice "Sample3"
    end
    assert_equal("* Sample1\n* Sample2\n* Sample3\n?  ", @output.string)
  end
  
  def test_layouts
    @input << "save\n"
    @input.rewind
    
    @terminal.choose(:load, :save, :quit) # Default:  layout = :list
    assert_equal("1. load\n2. save\n3. quit\n?  ", @output.string)

    @input.rewind
    @output.truncate(@output.rewind)

    @terminal.choose(:load, :save, :quit) do |menu|
      menu.header = "File Menu"
    end
    assert_equal( "File Menu:\n" + 
                  "1. load\n2. save\n3. quit\n?  ", @output.string )

    @input.rewind
    @output.truncate(@output.rewind)

    @terminal.choose(:load, :save, :quit) do |menu|
      menu.layout = :one_line
      menu.header = "File Menu"
      menu.prompt = "Operation?  "
    end
    assert_equal( "File Menu:  Operation?  " + 
                  "(load, save or quit)  ", @output.string )

    @input.rewind
    @output.truncate(@output.rewind)

    @terminal.choose(:load, :save, :quit) do |menu|
      menu.layout   = :menu_only
    end
    assert_equal("load, save or quit?  ", @output.string)

    @input.rewind
    @output.truncate(@output.rewind)

    @terminal.choose(:load, :save, :quit) do |menu|
      menu.layout = '<%= list(@menu) %>File Menu:  '
    end
    assert_equal("1. load\n2. save\n3. quit\nFile Menu:  ", @output.string)
  end
  
  def test_list_option
    @input << "l\n"
    @input.rewind

    @terminal.choose(:load, :save, :quit) do |menu|
      menu.layout      = :menu_only
      menu.list_option = ", or "
    end
    assert_equal("load, save, or quit?  ", @output.string)
  end

  def test_nil_on_handled
    @input << "3\n3\n2\n"
    @input.rewind

    # Shows that by default proc results are returned.
    output = @terminal.choose do |menu|
        menu.choice "Sample1" do "output1" end
        menu.choice "Sample2" do "output2" end
        menu.choice "Sample3" do "output3" end
    end
    assert_equal("output3", output)

    #
    # Shows that they can be replaced with +nil+ by setting
    # _nil_on_handled to +true+.
    #
    output = @terminal.choose do |menu|
        menu.nil_on_handled = true
        menu.choice "Sample1" do "output1" end
        menu.choice "Sample2" do "output2" end
        menu.choice "Sample3" do "output3" end
    end
    assert_equal(nil, output)

    # Shows that a menu item without a proc will be returned no matter what.
    output = @terminal.choose do |menu|
      menu.choice "Sample1"
      menu.choice "Sample2"
      menu.choice "Sample3"
    end
    assert_equal("Sample2", output)
  end
  
  def test_passed_command
    @input << "q\n"
    @input.rewind
    
    selected = nil
    @terminal.choose do |menu|
      menu.choices(:load, :save, :quit) { |command| selected = command }
    end
    assert_equal(:quit, selected)
  end
  
  def test_question_options
    @input << "save\n"
    @input.rewind

    answer = @terminal.choose(:Load, :Save, :Quit) do |menu|
      menu.case = :capitalize
    end
    assert_equal(:Save, answer)

    @input.rewind

    answer = @terminal.choose(:Load, :Save, :Quit) do |menu|
      menu.case      = :capitalize
      menu.character = :getc
    end
    assert_equal(:Save, answer)
    assert_equal(?a, @input.getc)
  end

  def test_select_by
    @input << "Sample1\n2\n"
    @input.rewind
    
    selected = @terminal.choose do |menu|
      menu.choice "Sample1"
      menu.choice "Sample2"
      menu.choice "Sample3"
    end
    assert_equal("Sample1", selected)
    
    @input.rewind

    selected = @terminal.choose do |menu|
      menu.select_by = :index
      
      menu.choice "Sample1"
      menu.choice "Sample2"
      menu.choice "Sample3"
    end
    assert_equal("Sample2", selected)

    @input.rewind

    selected = @terminal.choose do |menu|
      menu.select_by = :name
      
      menu.choice "Sample1"
      menu.choice "Sample2"
      menu.choice "Sample3"
    end
    assert_equal("Sample1", selected)
  end

  def test_hidden
    @input << "Hidden\n4\n"
    @input.rewind
    
    selected = @terminal.choose do |menu|
      menu.choice "Sample1"
      menu.choice "Sample2"
      menu.choice "Sample3"
      menu.hidden "Hidden!"
    end
    assert_equal("Hidden!", selected)
    assert_equal("1. Sample1\n2. Sample2\n3. Sample3\n?  ", @output.string)
    
    @input.rewind

    selected = @terminal.choose do |menu|
      menu.select_by = :index
      
      menu.choice "Sample1"
      menu.choice "Sample2"
      menu.choice "Sample3"
      menu.hidden "Hidden!"
    end
    assert_equal("Hidden!", selected)

    @input.rewind

    selected = @terminal.choose do |menu|
      menu.select_by = :name
      
      menu.choice "Sample1"
      menu.choice "Sample2"
      menu.choice "Sample3"
      menu.hidden "Hidden!"
    end
    assert_equal("Hidden!", selected)

    @input.rewind
  end

  def test_select_by_letter
    @input << "b\n"
    @input.rewind
    
    selected = @terminal.choose do |menu| 
      menu.index  = :letter
      menu.choice   :save
      menu.choice   :load
      menu.choice   :quit
    end
    assert_equal(:load, selected)
  end
  
  def test_shell
    @input << "save --some-option my_file.txt\n"
    @input.rewind

    selected = nil
    options  = nil
    answer = @terminal.choose do |menu|
      menu.choices(:load, :quit)
      menu.choice(:save) do |command, details|
        selected = command
        options  = details
        
        "Saved!"
      end
      menu.shell = true
    end
    assert_equal("Saved!", answer)
    assert_equal(:save, selected)
    assert_equal("--some-option my_file.txt", options)
  end

  def test_simple_menu_shortcut
    @input << "3\n"
    @input.rewind

    selected = @terminal.choose(:save, :load, :quit)
    assert_equal(:quit, selected)
  end

  def test_symbols
    @input << "3\n"
    @input.rewind
    
    selected = @terminal.choose do |menu|
      menu.choices(:save, :load, :quit) 
    end
    assert_equal(:quit, selected)
  end

  def test_paged_print_infinite_loop_bug
    @terminal.page_at = 5
    # Will page twice, so start with two new lines
    @input << "\n\n3\n"
    @input.rewind
  
    # Sadly this goes into an infinite loop without the fix to page_print    
    selected = @terminal.choose(* 1..10) 
    assert_equal(selected, 3)
  end


  def test_cancel_paging
    # Tests that paging can be cancelled halfway through
    @terminal.page_at = 5
    # Will page twice, so stop after first page and make choice 3
    @input << "q\n3\n"
    @input.rewind

    selected = @terminal.choose(* 1..10)
    assert_equal(selected, 3)

    # Make sure paging message appeared
    assert( @output.string.index('press enter/return to continue or q to stop'),
            "Paging message did not appear." )
   
    # Make sure it only appeared once
    assert( @output.string !~ /q to stop.*q to stop/m,
            "Paging message appeared more than once." )
  end
end