Implement generator for beer-song

Author: Katrina Owen

exercises/beer-song/.meta/.version

@@ -0,0 +1 @@
+3

exercises/beer-song/beer_song_test.rb

@@ -1,69 +1,77 @@
 #!/usr/bin/env ruby
+# encoding: utf-8
 gem 'minitest', '>= 5.0.0'
 require 'minitest/autorun'
 require_relative 'beer_song'
 
+# Common test data version: e699ab6
 class BeerSongTest < Minitest::Test
-  def test_the_first_verse
-    expected = "99 bottles of beer on the wall, 99 bottles of beer.\n" \
-      "Take one down and pass it around, 98 bottles of beer on the wall.\n"
+  def test_first_verse
+    # skip
+    expected = <<-TEXT
+99 bottles of beer on the wall, 99 bottles of beer.
+Take one down and pass it around, 98 bottles of beer on the wall.
+TEXT
     assert_equal expected, BeerSong.new.verse(99)
   end
 
-  def test_another_verse
+  def test_middle_verse
     skip
-    expected = "3 bottles of beer on the wall, 3 bottles of beer.\n" \
-      "Take one down and pass it around, 2 bottles of beer on the wall.\n"
-    assert_equal expected, BeerSong.new.verse(3)
+    expected = <<-TEXT
+44 bottles of beer on the wall, 44 bottles of beer.
+Take one down and pass it around, 43 bottles of beer on the wall.
+TEXT
+    assert_equal expected, BeerSong.new.verse(44)
   end
 
-  def test_verse_2
+  def test_third_to_last_verse
     skip
-    expected = "2 bottles of beer on the wall, 2 bottles of beer.\n" \
-      "Take one down and pass it around, 1 bottle of beer on the wall.\n"
+    expected = <<-TEXT
+2 bottles of beer on the wall, 2 bottles of beer.
+Take one down and pass it around, 1 bottle of beer on the wall.
+TEXT
     assert_equal expected, BeerSong.new.verse(2)
   end
 
-  def test_verse_1
+  def test_penultimate_verse
     skip
-    expected = "1 bottle of beer on the wall, 1 bottle of beer.\n" \
-      "Take it down and pass it around, no more bottles of beer on the wall.\n"
+    expected = <<-TEXT
+1 bottle of beer on the wall, 1 bottle of beer.
+Take it down and pass it around, no more bottles of beer on the wall.
+TEXT
     assert_equal expected, BeerSong.new.verse(1)
   end
 
-  def test_verse_0
+  def test_last_verse
     skip
-    expected = "No more bottles of beer on the wall, no more bottles of beer.\n" \
-      "Go to the store and buy some more, 99 bottles of beer on the wall.\n"
+    expected = <<-TEXT
+No more bottles of beer on the wall, no more bottles of beer.
+Go to the store and buy some more, 99 bottles of beer on the wall.
+TEXT
     assert_equal expected, BeerSong.new.verse(0)
   end
 
-  def test_a_couple_verses
+  def test_last_4_verses
     skip
-    expected = "99 bottles of beer on the wall, 99 bottles of beer.\n" \
-      "Take one down and pass it around, 98 bottles of beer on the wall.\n" \
-      "\n" \
-      "98 bottles of beer on the wall, 98 bottles of beer.\n" \
-      "Take one down and pass it around, 97 bottles of beer on the wall.\n"
-    assert_equal expected, BeerSong.new.verses(99, 98)
-  end
+    expected = <<-TEXT
+3 bottles of beer on the wall, 3 bottles of beer.
+Take one down and pass it around, 2 bottles of beer on the wall.
 
-  def test_a_few_verses
-    skip
-    expected = "2 bottles of beer on the wall, 2 bottles of beer.\n" \
-      "Take one down and pass it around, 1 bottle of beer on the wall.\n" \
-      "\n" \
-      "1 bottle of beer on the wall, 1 bottle of beer.\n" \
-      "Take it down and pass it around, no more bottles of beer on the wall.\n" \
-      "\n" \
-      "No more bottles of beer on the wall, no more bottles of beer.\n" \
-      "Go to the store and buy some more, 99 bottles of beer on the wall.\n"
-    assert_equal expected, BeerSong.new.verses(2, 0)
+2 bottles of beer on the wall, 2 bottles of beer.
+Take one down and pass it around, 1 bottle of beer on the wall.
+
+1 bottle of beer on the wall, 1 bottle of beer.
+Take it down and pass it around, no more bottles of beer on the wall.
+
+No more bottles of beer on the wall, no more bottles of beer.
+Go to the store and buy some more, 99 bottles of beer on the wall.
+TEXT
+    assert_equal expected, BeerSong.new.lyrics(3, 0)
   end
 
-  def test_the_whole_song
+  def test_all_verses
     skip
-    expected = <<-SONG
+    expected = <<-TEXT
 99 bottles of beer on the wall, 99 bottles of beer.
 Take one down and pass it around, 98 bottles of beer on the wall.
 
@@ -363,18 +371,27 @@ def test_the_whole_song
 
 No more bottles of beer on the wall, no more bottles of beer.
 Go to the store and buy some more, 99 bottles of beer on the wall.
-    SONG
-    assert_equal expected, BeerSong.new.lyrics
+TEXT
+    assert_equal expected, BeerSong.new.lyrics(99, 0)
   end
-
-  # Problems in exercism evolve over time,
-  # as we find better ways to ask questions.
+  # Problems in exercism evolve over time, as we find better ways to ask
+  # questions.
   # The version number refers to the version of the problem you solved,
   # not your solution.
   #
-  # Define a constant named VERSION inside of BookKeeping.
+  # Define a constant named VERSION inside of the top level BookKeeping
+  # module, which may be placed near the end of your file.
+  #
+  # In your file, it will look like this:
+  #
+  # module BookKeeping
+  #   VERSION = 1 # Where the version number matches the one in the test.
+  # end
+  #
+  # If you are curious, read more about constants on RubyDoc:
+  # http://ruby-doc.org/docs/ruby-doc-bundle/UsersGuide/rg/constants.html
   def test_bookkeeping
     skip
-    assert_equal 2, BookKeeping::VERSION
+    assert_equal 3, BookKeeping::VERSION
   end
 end

exercises/beer-song/example.rb

@@ -1,13 +1,9 @@
 module BookKeeping
-  VERSION = 2
+  VERSION = 3
 end
 
 class BeerSong
-  def lyrics
-    verses(99, 0)
-  end
-
-  def verses(upper_bound, lower_bound)
+  def lyrics(upper_bound, lower_bound)
     upper_bound.downto(lower_bound).map { |i| verse(i) }.join("\n")
   end
 

exercises/beer-song/example.tt

@@ -0,0 +1,22 @@
+#!/usr/bin/env ruby
+# encoding: utf-8
+gem 'minitest', '>= 5.0.0'
+require 'minitest/autorun'
+require_relative 'beer_song'
+
+# Common test data version: <%= abbreviated_commit_hash %>
+class BeerSongTest < Minitest::Test<% test_cases.each do |test_case| %>
+  def <%= test_case.test_name %>
+    <%= test_case.skipped %>
+    expected = <<-TEXT
+<%= test_case.expected %>
+TEXT
+    assert_equal expected, <%= test_case.workload %>
+  end
+<% end %>
+<%= IO.read(XRUBY_LIB + '/bookkeeping.md') %>
+  def test_bookkeeping
+    skip
+    assert_equal <%= version %>, BookKeeping::VERSION
+  end
+end

lib/beer_song_cases.rb

@@ -0,0 +1,43 @@
+require 'exercise_cases'
+
+class BeerSongCase < OpenStruct
+  def test_name
+    'test_%s' % description.tr(' ', '_')
+  end
+
+  def workload
+    "BeerSong.new.%s(%s)" % [section, workload_arguments]
+  end
+
+  def expected
+    self["expected"].gsub('\n', '"\n" \\')
+  end
+
+  def skipped
+    index.zero? ? '# skip' : 'skip'
+  end
+
+  private
+
+  def workload_arguments
+    if section == 'lyrics'
+      "%s, %s" % [self["beginning"], self["end"]]
+    else
+      number
+    end
+  end
+end
+
+BeerSongCases = proc do |data|
+  i = 0
+  json = JSON.parse(data)
+  cases = []
+  %w(verse lyrics).each do |section|
+    json[section]['cases'].each do |row|
+      row = row.merge(row.merge('index' => i, 'section' => section))
+      cases << BeerSongCase.new(row)
+      i += 1
+    end
+  end
+  cases
+end