Add anagram generator

exercises/anagram/.version

@@ -0,0 +1 @@
+2

exercises/anagram/anagram_test.rb

@@ -3,70 +3,140 @@
 require 'minitest/autorun'
 require_relative 'anagram'
 
+# Test data version:
+# 6a886e0
 class AnagramTest < Minitest::Test
   def test_no_matches
+    # skip
     detector = Anagram.new('diaper')
-    assert_equal [], detector.match(%w(hello world zombies pants))
+    anagrams = detector.match(["hello", "world", "zombies", "pants"])
+    assert_equal [], anagrams
   end
 
-  def test_detect_simple_anagram
+  def test_detects_simple_anagram
     skip
     detector = Anagram.new('ant')
-    anagrams = detector.match(%w(tan stand at))
-    assert_equal ['tan'], anagrams
+    anagrams = detector.match(["tan", "stand", "at"])
+    assert_equal ["tan"], anagrams
   end
 
-  def test_detect_multiple_anagrams
+  def test_does_not_detect_false_positives
+    skip
+    detector = Anagram.new('galea')
+    anagrams = detector.match(["eagle"])
+    assert_equal [], anagrams
+  end
+
+  def test_detects_multiple_anagrams
     skip
     detector = Anagram.new('master')
-    anagrams = detector.match(%w(stream pigeon maters))
-    assert_equal %w(maters stream), anagrams.sort
+    anagrams = detector.match(["stream", "pigeon", "maters"])
+    assert_equal ["maters", "stream"], anagrams.sort
   end
 
-  def test_does_not_confuse_different_duplicates
+  def test_does_not_detect_anagram_subsets
     skip
-    detector = Anagram.new('galea')
-    assert_equal [], detector.match(['eagle'])
+    detector = Anagram.new('good')
+    anagrams = detector.match(["dog", "goody"])
+    assert_equal [], anagrams
   end
 
-  def test_identical_word_is_not_anagram
+  def test_detects_anagram
+    skip
+    detector = Anagram.new('listen')
+    anagrams = detector.match(["enlists", "google", "inlets", "banana"])
+    assert_equal ["inlets"], anagrams
+  end
+
+  def test_detects_multiple_anagrams
+    skip
+    detector = Anagram.new('allergy')
+    anagrams = detector.match(["gallery", "ballerina", "regally", "clergy", "largely", "leading"])
+    assert_equal ["gallery", "largely", "regally"], anagrams.sort
+  end
+
+  def test_does_not_detect_identical_words
     skip
     detector = Anagram.new('corn')
-    anagrams = detector.match %w(corn dark Corn rank CORN cron park)
-    assert_equal ['cron'], anagrams
+    anagrams = detector.match(["corn", "dark", "Corn", "rank", "CORN", "cron", "park"])
+    assert_equal ["cron"], anagrams
   end
 
-  def test_eliminate_anagrams_with_same_checksum
+  def test_does_not_detect_non_anagrams_with_identical_checksum
     skip
     detector = Anagram.new('mass')
-    assert_equal [], detector.match(['last'])
+    anagrams = detector.match(["last"])
+    assert_equal [], anagrams
   end
 
-  def test_eliminate_anagram_subsets
+  def test_detects_anagrams_case_insensitively
     skip
-    detector = Anagram.new('good')
-    assert_equal [], detector.match(%w(dog goody))
+    detector = Anagram.new('Orchestra')
+    anagrams = detector.match(["cashregister", "Carthorse", "radishes"])
+    assert_equal ["Carthorse"], anagrams
   end
 
-  def test_detect_anagram
+  def test_detects_anagrams_using_case_insensitive_subject
     skip
-    detector = Anagram.new('listen')
-    anagrams = detector.match %w(enlists google inlets banana)
-    assert_equal ['inlets'], anagrams
+    detector = Anagram.new('Orchestra')
+    anagrams = detector.match(["cashregister", "carthorse", "radishes"])
+    assert_equal ["carthorse"], anagrams
   end
 
-  def test_multiple_anagrams
+  def test_detects_anagrams_using_case_insensitive_possible_matches
     skip
-    detector = Anagram.new('allergy')
-    anagrams =
-      detector.match %w(gallery ballerina regally clergy largely leading)
-    assert_equal %w(gallery largely regally), anagrams.sort
+    detector = Anagram.new('orchestra')
+    anagrams = detector.match(["cashregister", "Carthorse", "radishes"])
+    assert_equal ["Carthorse"], anagrams
   end
 
-  def test_anagrams_are_case_insensitive
+  def test_does_not_detect_a_word_as_its_own_anagram
     skip
-    detector = Anagram.new('Orchestra')
-    anagrams = detector.match %w(cashregister Carthorse radishes)
-    assert_equal ['Carthorse'], anagrams
+    detector = Anagram.new('banana')
+    anagrams = detector.match(["Banana"])
+    assert_equal [], anagrams
+  end
+
+  def test_does_not_detect_a_anagram_if_the_original_word_is_repeated
+    skip
+    detector = Anagram.new('go')
+    anagrams = detector.match(["go Go GO"])
+    assert_equal [], anagrams
+  end
+
+  def test_anagrams_must_use_all_letters_exactly_once
+    skip
+    detector = Anagram.new('tapper')
+    anagrams = detector.match(["patter"])
+    assert_equal [], anagrams
+  end
+
+  def test_capital_word_is_not_own_anagram
+    skip
+    detector = Anagram.new('BANANA')
+    anagrams = detector.match(["Banana"])
+    assert_equal [], anagrams
+  end
+
+  # 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 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
   end
 end

exercises/anagram/example.rb

@@ -1,3 +1,7 @@
+module BookKeeping
+  VERSION=2
+end
+
 class Anagram
   attr_reader :subject
   def initialize(word)

exercises/anagram/example.tt

@@ -0,0 +1,19 @@
+#!/usr/bin/env ruby
+gem 'minitest', '>= 5.0.0'
+require 'minitest/autorun'
+require_relative 'anagram'
+
+# Test data version:
+# <%= sha1 %>
+class AnagramTest < Minitest::Test<% test_cases.each do |test_case| %>
+  def <%= test_case.test_name %>
+    <%= test_case.skipped %>
+    <%= test_case.work_load %>
+  end
+<% end %>
+<%= IO.read(XRUBY_LIB + '/bookkeeping.md') %>
+  def test_bookkeeping
+    skip
+    assert_equal <%= version.next %>, BookKeeping::VERSION
+  end
+end

lib/anagram_cases.rb

@@ -0,0 +1,42 @@
+class AnagramCase < OpenStruct
+  def test_name
+    'test_%s' % description.gsub(/[ -]/, '_')
+  end
+
+  def work_load
+    indent_lines([show_comment, detector, anagram, assert].compact)
+  end
+
+  def skipped
+    index.zero? ? '# skip' : 'skip'
+  end
+
+  private
+
+  def indent_lines(code, indent = 2)
+    code.join("\n" + ' '*2*indent)
+  end
+
+  def show_comment
+    "# #{comment}" unless comment.nil?
+  end
+
+  def detector
+    "detector = Anagram.new('#{subject}')"
+  end
+
+  def anagram
+    "anagrams = detector.match(#{candidates})"
+  end
+
+  def assert
+    actual = expected.size > 1 ? 'anagrams.sort' : 'anagrams'
+    "assert_equal #{expected.sort}, #{actual}"
+  end
+end
+
+AnagramCases = proc do |data|
+  JSON.parse(data)['cases'].map.with_index do |row, i|
+    AnagramCase.new(row.merge('index' => i))
+  end
+end