adding -l option for practicing a level - closes ryanb#11

features/command_options.feature

@@ -23,3 +23,25 @@ Feature: Command Options
     Then I should see "directory for the next level"
     When I run rubywarrior with options "-d tmp/ruby-warrior/joe-beginner -t 0 -s"
     Then I should see "failed the level"
+
+  Scenario: Unable to practice level if not epic
+    Given a profile named "Joe" on "beginner"
+    When I copy fixture "walking_player.rb" to "tmp/ruby-warrior/joe-beginner/player.rb"
+    And I run rubywarrior with options "-d tmp/ruby-warrior/joe-beginner -l 2"
+    Then I should see "Unable"
+
+  @focus
+  Scenario: Practice specific level when epic
+    When I copy fixture "short-tower" to "towers/short"
+    Given a profile named "Bill" on "short"
+    When I copy fixture "walking_player.rb" to "tmp/ruby-warrior/bill-short/player.rb"
+    And I run rubywarrior
+    And I choose "Bill - short - level 1" for "profile"
+    Then I answer "y" to "next level"
+    And I should see "next level"
+    When I run rubywarrior
+    And I choose "Bill - short - level 2" for "profile"
+    Then I answer "y" to "epic"
+    And I should see "epic mode"
+    When I run rubywarrior with options "-d tmp/ruby-warrior/bill-short -l 2"
+    Then I should not see "Level 1" before "Total Score: 17"

features/step_definitions/interaction_steps.rb

@@ -59,3 +59,7 @@
 Then /^I should see "([^\"]*)"$/ do |phrase|
   @io.gets_until_include(phrase).should include(phrase)
 end
+
+Then /^I should not see "([^\"]*)" before "([^\"]*)"$/ do |first_phrase, second_phrase|
+  @io.gets_until_include(second_phrase).should_not include(first_phrase)
+end

lib/ruby_warrior/config.rb

@@ -1,7 +1,7 @@
 module RubyWarrior
   class Config
     class << self
-      attr_accessor :delay, :in_stream, :out_stream
+      attr_accessor :delay, :in_stream, :out_stream, :practice_level
       attr_writer :path_prefix, :skip_input
 
       def path_prefix
@@ -13,7 +13,7 @@ def skip_input?
       end
 
       def reset
-        [:@path_prefix, :@skip_input, :@delay, :@in_stream, :@out_stream].each do |i|
+        [:@path_prefix, :@skip_input, :@delay, :@in_stream, :@out_stream, :@practice_level].each do |i|
           remove_instance_variable(i) if instance_variable_defined?(i)
         end
       end

lib/ruby_warrior/game.rb

@@ -13,19 +13,29 @@ def start
       if profile.epic?
         Config.delay /= 2 if Config.delay # speed up UI since we're going to be doing a lot here
         profile.current_epic_score = 0
-        playing = true
-        while playing
+        if Config.practice_level
           @current_level = @next_level = nil
-          profile.level_number += 1
-          playing = play_current_level
+          profile.level_number = Config.practice_level.to_i
+          play_current_level
+        else
+          playing = true
+          while playing
+            @current_level = @next_level = nil
+            profile.level_number += 1
+            playing = play_current_level
+          end
+          profile.save # saves the score for epic mode
         end
-        profile.save # saves the score for epic mode
       else
-        if current_level.number.zero?
-          prepare_next_level
-          UI.puts "First level has been generated. See the ruby-warrior directory for instructions."
+        if Config.practice_level
+          UI.puts "Unable to practice level while not in epic mode, remove -l option."
         else
-          play_current_level
+          if current_level.number.zero?
+            prepare_next_level
+            UI.puts "First level has been generated. See the ruby-warrior directory for instructions."
+          else
+            play_current_level
+          end
         end
       end
     end

lib/ruby_warrior/runner.rb

@@ -23,6 +23,7 @@ def parse_options
       options = OptionParser.new 
       options.banner = "Usage: rubywarrior [options]"
       options.on('-d', '--directory DIR', "Run under given directory")  { |dir| Config.path_prefix = dir }
+      options.on('-l', '--level LEVEL',   "Practice level on epic")     { |level| Config.practice_level = level }
       options.on('-s', '--skip',          "Skip user input")            { Config.skip_input = true }
       options.on('-t', '--time SECONDS',  "Delay each turn by seconds") { |seconds| Config.delay = seconds.to_f }
       options.on('-h', '--help',          "Show this message")          { puts(options); exit }