Update bob and change and book store

Author: meatball133

exercises/practice/bob/.meta/test_template.erb

@@ -0,0 +1,12 @@
+require 'minitest/autorun'
+require_relative 'bob'
+
+class BobTest < Minitest::Test
+<% json["cases"].each do |cases| %>
+    def test_<%= underscore(cases["description"]) %>
+        <%= skip? %> 
+        remark = <%= cases["input"]["heyBob"].dump()  %>
+        assert_equal "<%= cases["expected"] %>", Bob.hey(remark), <%= "Bob hears #{ cases["input"]["heyBob"].dump}, and..".dump %>
+    end
+<% end %>
+end

exercises/practice/bob/bob_test.rb

@@ -5,150 +5,150 @@ class BobTest < Minitest::Test
   def test_stating_something
     # skip
     remark = "Tom-ay-to, tom-aaaah-to."
-    assert_equal "Whatever.", Bob.hey(remark), 'Bob hears "Tom-ay-to, tom-aaaah-to.", and..'
+    assert_equal "Whatever.", Bob.hey(remark), "Bob hears \"Tom-ay-to, tom-aaaah-to.\", and.."
   end
 
   def test_shouting
     skip
     remark = "WATCH OUT!"
-    assert_equal "Whoa, chill out!", Bob.hey(remark), 'Bob hears "WATCH OUT!", and..'
+    assert_equal "Whoa, chill out!", Bob.hey(remark), "Bob hears \"WATCH OUT!\", and.."
   end
 
   def test_shouting_gibberish
     skip
     remark = "FCECDFCAAB"
-    assert_equal "Whoa, chill out!", Bob.hey(remark), 'Bob hears "FCECDFCAAB", and..'
+    assert_equal "Whoa, chill out!", Bob.hey(remark), "Bob hears \"FCECDFCAAB\", and.."
   end
 
   def test_asking_a_question
     skip
     remark = "Does this cryogenic chamber make me look fat?"
-    assert_equal "Sure.", Bob.hey(remark), 'Bob hears "Does this cryogenic chamber make me look fat?", and..'
+    assert_equal "Sure.", Bob.hey(remark), "Bob hears \"Does this cryogenic chamber make me look fat?\", and.."
   end
 
   def test_asking_a_numeric_question
     skip
     remark = "You are, what, like 15?"
-    assert_equal "Sure.", Bob.hey(remark), 'Bob hears "You are, what, like 15?", and..'
+    assert_equal "Sure.", Bob.hey(remark), "Bob hears \"You are, what, like 15?\", and.."
   end
 
   def test_asking_gibberish
     skip
     remark = "fffbbcbeab?"
-    assert_equal "Sure.", Bob.hey(remark), 'Bob hears "fffbbcbeab?", and..'
+    assert_equal "Sure.", Bob.hey(remark), "Bob hears \"fffbbcbeab?\", and.."
   end
 
   def test_talking_forcefully
     skip
     remark = "Hi there!"
-    assert_equal "Whatever.", Bob.hey(remark), 'Bob hears "Hi there!", and..'
+    assert_equal "Whatever.", Bob.hey(remark), "Bob hears \"Hi there!\", and.."
   end
 
   def test_using_acronyms_in_regular_speech
     skip
     remark = "It's OK if you don't want to go work for NASA."
-    assert_equal "Whatever.", Bob.hey(remark), %q(Bob hears "It's OK if you don't want to go work for NASA.", and..)
+    assert_equal "Whatever.", Bob.hey(remark), "Bob hears \"It's OK if you don't want to go work for NASA.\", and.."
   end
 
   def test_forceful_question
     skip
     remark = "WHAT'S GOING ON?"
-    assert_equal "Calm down, I know what I'm doing!", Bob.hey(remark), %q(Bob hears "WHAT'S GOING ON?", and..)
+    assert_equal "Calm down, I know what I'm doing!", Bob.hey(remark), "Bob hears \"WHAT'S GOING ON?\", and.."
   end
 
   def test_shouting_numbers
     skip
     remark = "1, 2, 3 GO!"
-    assert_equal "Whoa, chill out!", Bob.hey(remark), 'Bob hears "1, 2, 3 GO!", and..'
+    assert_equal "Whoa, chill out!", Bob.hey(remark), "Bob hears \"1, 2, 3 GO!\", and.."
   end
 
   def test_no_letters
     skip
     remark = "1, 2, 3"
-    assert_equal "Whatever.", Bob.hey(remark), 'Bob hears "1, 2, 3", and..'
+    assert_equal "Whatever.", Bob.hey(remark), "Bob hears \"1, 2, 3\", and.."
   end
 
   def test_question_with_no_letters
     skip
     remark = "4?"
-    assert_equal "Sure.", Bob.hey(remark), 'Bob hears "4?", and..'
+    assert_equal "Sure.", Bob.hey(remark), "Bob hears \"4?\", and.."
   end
 
   def test_shouting_with_special_characters
     skip
     remark = "ZOMG THE %^*@\#$(*^ ZOMBIES ARE COMING!!11!!1!"
-    assert_equal "Whoa, chill out!", Bob.hey(remark), %q{Bob hears "ZOMG THE %^*@\#$(*^ ZOMBIES ARE COMING!!11!!1!", and..}
+    assert_equal "Whoa, chill out!", Bob.hey(remark), "Bob hears \"ZOMG THE %^*@\\\#$(*^ ZOMBIES ARE COMING!!11!!1!\", and.."
   end
 
   def test_shouting_with_no_exclamation_mark
     skip
     remark = "I HATE THE DENTIST"
-    assert_equal "Whoa, chill out!", Bob.hey(remark), 'Bob hears "I HATE THE DENTIST", and..'
+    assert_equal "Whoa, chill out!", Bob.hey(remark), "Bob hears \"I HATE THE DENTIST\", and.."
   end
 
   def test_statement_containing_question_mark
     skip
     remark = "Ending with ? means a question."
-    assert_equal "Whatever.", Bob.hey(remark), 'Bob hears "Ending with ? means a question.", and..'
+    assert_equal "Whatever.", Bob.hey(remark), "Bob hears \"Ending with ? means a question.\", and.."
   end
 
   def test_non_letters_with_question
     skip
     remark = ":) ?"
-    assert_equal "Sure.", Bob.hey(remark), 'Bob hears ":) ?", and..'
+    assert_equal "Sure.", Bob.hey(remark), "Bob hears \":) ?\", and.."
   end
 
   def test_prattling_on
     skip
     remark = "Wait! Hang on. Are you going to be OK?"
-    assert_equal "Sure.", Bob.hey(remark), 'Bob hears "Wait! Hang on. Are you going to be OK?", and..'
+    assert_equal "Sure.", Bob.hey(remark), "Bob hears \"Wait! Hang on. Are you going to be OK?\", and.."
   end
 
   def test_silence
     skip
     remark = ""
-    assert_equal "Fine. Be that way!", Bob.hey(remark), 'Bob hears "", and..'
+    assert_equal "Fine. Be that way!", Bob.hey(remark), "Bob hears \"\", and.."
   end
 
   def test_prolonged_silence
     skip
     remark = "          "
-    assert_equal "Fine. Be that way!", Bob.hey(remark), 'Bob hears "          ", and..'
+    assert_equal "Fine. Be that way!", Bob.hey(remark), "Bob hears \"          \", and.."
   end
 
   def test_alternate_silence
     skip
     remark = "\t\t\t\t\t\t\t\t\t\t"
-    assert_equal "Fine. Be that way!", Bob.hey(remark), %q(Bob hears "\t\t\t\t\t\t\t\t\t\t", and..)
-  end
-
-  def test_multiple_line_question
-    skip
-    remark = "\nDoes this cryogenic chamber make me look fat?\nNo."
-    assert_equal "Whatever.", Bob.hey(remark), %q(Bob hears "\nDoes this cryogenic chamber make me look fat?\nNo.", and..)
+    assert_equal "Fine. Be that way!", Bob.hey(remark), "Bob hears \"\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\", and.."
   end
 
   def test_starting_with_whitespace
     skip
     remark = "         hmmmmmmm..."
-    assert_equal "Whatever.", Bob.hey(remark), 'Bob hears "         hmmmmmmm...", and..'
+    assert_equal "Whatever.", Bob.hey(remark), "Bob hears \"         hmmmmmmm...\", and.."
   end
 
   def test_ending_with_whitespace
     skip
     remark = "Okay if like my  spacebar  quite a bit?   "
-    assert_equal "Sure.", Bob.hey(remark), 'Bob hears "Okay if like my  spacebar  quite a bit?   ", and..'
+    assert_equal "Sure.", Bob.hey(remark), "Bob hears \"Okay if like my  spacebar  quite a bit?   \", and.."
   end
 
   def test_other_whitespace
     skip
     remark = "\n\r \t"
-    assert_equal "Fine. Be that way!", Bob.hey(remark), %q(Bob hears "\n\r \t", and..)
+    assert_equal "Fine. Be that way!", Bob.hey(remark), "Bob hears \"\\n\\r \\t\", and.."
   end
 
   def test_non_question_ending_with_whitespace
     skip
     remark = "This is a statement ending with whitespace      "
-    assert_equal "Whatever.", Bob.hey(remark), 'Bob hears "This is a statement ending with whitespace      ", and..'
+    assert_equal "Whatever.", Bob.hey(remark), "Bob hears \"This is a statement ending with whitespace      \", and.."
+  end
+
+  def test_multiple_line_question
+    skip
+    remark = "\nDoes this cryogenic chamber make\n me look fat?"
+    assert_equal "Sure.", Bob.hey(remark), "Bob hears \"\\nDoes this cryogenic chamber make\\n me look fat?\", and.."
   end
 end

exercises/practice/book-store/.meta/test_template.erb

@@ -0,0 +1,12 @@
+require 'minitest/autorun'
+require_relative 'book_store'
+
+class BookStoreTest < Minitest::Test
+<% json["cases"].each do |cases| %>
+    def test_<%= underscore(cases["description"]) %>
+        <%= skip? %> 
+        basket = <%= cases["input"]["basket"] %>
+        assert_in_delta <%= cases["expected"] / 100.0 %>0, BookStore.calculate_price(basket), 0.001
+    end
+<% end %>
+end

exercises/practice/change/.meta/test_template.erb

@@ -0,0 +1,26 @@
+require 'minitest/autorun'
+require_relative 'change'
+
+class ChangeTest < Minitest::Test
+<% json["cases"].each do |cases| %>
+    def test_<%= underscore(cases["description"]) %>
+        <%= skip? %> 
+        <%- if cases["expected"].is_a?(Hash) && cases["expected"].key?("error") -%>
+            <%- if cases["expected"]["error"] == "can't make target with given coins" -%>
+                assert_raises(Change::ImpossibleCombinationError) do
+            <%- elsif cases["expected"]["error"] == "target can't be negative" -%>
+                assert_raises(Change::NegativeTargetError) do
+            <%- end -%>
+                Change.generate(<%= cases["input"]["coins"] %>, <%= cases["input"]["target"] %>)
+            end
+        <%- else -%>
+            <%- if cases["expected"].empty? -%>
+                assert_empty Change.generate(<%= cases["input"]["coins"] %>, <%= cases["input"]["target"] %>)
+            <%- else -%>
+                expected = <%= cases["expected"] %>
+                assert_equal expected, Change.generate(<%= cases["input"]["coins"] %>, <%= cases["input"]["target"] %>)
+            <%- end -%>
+        <%- end -%>
+    end
+<% end %>
+end

exercises/practice/change/change_test.rb

@@ -4,27 +4,32 @@
 class ChangeTest < Minitest::Test
   def test_change_for_1_cent
     # skip
-    assert_equal [1], Change.generate([1, 5, 10, 25], 1)
+    expected = [1]
+    assert_equal expected, Change.generate([1, 5, 10, 25], 1)
   end
 
   def test_single_coin_change
     skip
-    assert_equal [25], Change.generate([1, 5, 10, 25, 100], 25)
+    expected = [25]
+    assert_equal expected, Change.generate([1, 5, 10, 25, 100], 25)
   end
 
   def test_multiple_coin_change
     skip
-    assert_equal [5, 10], Change.generate([1, 5, 10, 25, 100], 15)
+    expected = [5, 10]
+    assert_equal expected, Change.generate([1, 5, 10, 25, 100], 15)
   end
 
   def test_change_with_lilliputian_coins
     skip
-    assert_equal [4, 4, 15], Change.generate([1, 4, 15, 20, 50], 23)
+    expected = [4, 4, 15]
+    assert_equal expected, Change.generate([1, 4, 15, 20, 50], 23)
   end
 
   def test_change_with_lower_elbonia_coins
     skip
-    assert_equal [21, 21, 21], Change.generate([1, 5, 10, 21, 25], 63)
+    expected = [21, 21, 21]
+    assert_equal expected, Change.generate([1, 5, 10, 21, 25], 63)
   end
 
   def test_large_target_values
@@ -35,12 +40,20 @@ def test_large_target_values
 
   def test_possible_change_without_unit_coins_available
     skip
-    assert_equal [2, 2, 2, 5, 10], Change.generate([2, 5, 10, 20, 50], 21)
+    expected = [2, 2, 2, 5, 10]
+    assert_equal expected, Change.generate([2, 5, 10, 20, 50], 21)
   end
 
   def test_another_possible_change_without_unit_coins_available
     skip
-    assert_equal [4, 4, 4, 5, 5, 5], Change.generate([4, 5], 27)
+    expected = [4, 4, 4, 5, 5, 5]
+    assert_equal expected, Change.generate([4, 5], 27)
+  end
+
+  def test_a_greedy_approach_is_not_optimal
+    skip
+    expected = [10, 10]
+    assert_equal expected, Change.generate([1, 10, 11], 20)
   end
 
   def test_no_coins_make_0_change