space-age: Add generator

exercises/space-age/.meta/.version

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

exercises/space-age/.meta/generator/space_age_case.rb

@@ -0,0 +1,11 @@
+require 'generator/exercise_case'
+
+class SpaceAgeCase < Generator::ExerciseCase
+  using Generator::Underscore
+
+  def workload
+    indent_lines(["age = SpaceAge.new(#{seconds.underscore})",
+      "assert_in_delta #{expected}, age.on_#{planet.downcase}, DELTA"
+    ], 4)
+  end
+end

exercises/space-age/.meta/generator/test_template.erb

@@ -0,0 +1,25 @@
+#!/usr/bin/env ruby
+require 'minitest/autorun'
+require_relative '<%= exercise_name %>'
+
+# Common test data version: <%= canonical_data_version %> <%= abbreviated_commit_hash %>
+class <%= exercise_name_camel %>Test < Minitest::Test
+  # assert_in_delta will pass if the difference
+  # between the values being compared is less
+  # than the allowed delta
+  DELTA = 0.01
+
+<% test_cases.each_with_index do |test_case, idx| %>
+  def <%= test_case.name %>
+    <%= test_case.skipped(idx) %>
+    <%= test_case.workload %>
+  end
+
+<% end %>
+<%= IO.read(XRUBY_LIB + '/bookkeeping.md') %>
+
+  def test_bookkeeping
+    skip
+    assert_equal <%= version %>, BookKeeping::VERSION
+  end
+end

exercises/space-age/.meta/solutions/space_age.rb

@@ -1,3 +1,7 @@
+module BookKeeping
+  VERSION = 1
+end
+
 class SpaceAge
   attr_reader :seconds
 

exercises/space-age/space_age_test.rb

@@ -2,66 +2,80 @@
 require 'minitest/autorun'
 require_relative 'space_age'
 
+# Common test data version: 1.0.0 7c63e40
 class SpaceAgeTest < Minitest::Test
+  # assert_in_delta will pass if the difference
+  # between the values being compared is less
+  # than the allowed delta
   DELTA = 0.01
 
-  def test_age_in_seconds
-    age = SpaceAge.new(1_000_000)
-    assert_in_delta 1_000_000, age.seconds, DELTA
-  end
-
-  def test_age_in_earth_years
-    skip
+  def test_age_on_earth
+    # skip
     age = SpaceAge.new(1_000_000_000)
     assert_in_delta 31.69, age.on_earth, DELTA
   end
 
-  def test_age_in_mercury_years
+  def test_age_on_mercury
     skip
     age = SpaceAge.new(2_134_835_688)
-    assert_in_delta 67.65, age.on_earth, DELTA
     assert_in_delta 280.88, age.on_mercury, DELTA
   end
 
-  def test_age_in_venus_years
+  def test_age_on_venus
     skip
     age = SpaceAge.new(189_839_836)
-    assert_in_delta 6.02, age.on_earth, DELTA
     assert_in_delta 9.78, age.on_venus, DELTA
   end
 
   def test_age_on_mars
     skip
     age = SpaceAge.new(2_329_871_239)
-    assert_in_delta 73.83, age.on_earth, DELTA
     assert_in_delta 39.25, age.on_mars, DELTA
   end
 
   def test_age_on_jupiter
     skip
     age = SpaceAge.new(901_876_382)
-    assert_in_delta 28.58, age.on_earth, DELTA
     assert_in_delta 2.41, age.on_jupiter, DELTA
   end
 
   def test_age_on_saturn
     skip
     age = SpaceAge.new(3_000_000_000)
-    assert_in_delta 95.06, age.on_earth, DELTA
     assert_in_delta 3.23, age.on_saturn, DELTA
   end
 
   def test_age_on_uranus
     skip
     age = SpaceAge.new(3_210_123_456)
-    assert_in_delta 101.72, age.on_earth, DELTA
     assert_in_delta 1.21, age.on_uranus, DELTA
   end
 
   def test_age_on_neptune
     skip
     age = SpaceAge.new(8_210_123_456)
-    assert_in_delta 260.16, age.on_earth, DELTA
     assert_in_delta 1.58, age.on_neptune, DELTA
   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 1, BookKeeping::VERSION
+  end
 end

lib/generator/underscore.rb

@@ -5,5 +5,11 @@ def underscore
         downcase.gsub(/[- ]/, '_').gsub(/[^\w?]/, '')
       end
     end
+
+    refine Fixnum do
+      def underscore
+        self.to_s.reverse.gsub(/...(?=.)/, '\&_').reverse
+      end
+    end
   end
 end