armstrong-numbers: finish implementation

  - fix conflicts
  - implement generator

Author: guygastineau

config.json

@@ -57,17 +57,14 @@
       "unlocked_by": null,
       "difficulty": 2,
       "topics": [
-        "arrays",
-        "sequences",
-        "strings",
-        "regular_expressions"
+        "arrays"
       ]
     },
     {
       "slug": "armstrong-numbers",
       "uuid": "77c5c7e6-265a-4f1a-9bc4-851f8f825420",
       "core": false,
-      "unlocked_by": "isogram",
+      "unlocked_by": "series",
       "difficulty": 3,
       "topics": [
         "math"

exercises/armstrong-numbers/.meta/generator/armstrong_numbers_case.rb

@@ -0,0 +1,12 @@
+require 'generator/exercise_case'
+
+class ArmstrongNumbersCase < Generator::ExerciseCase
+
+  def workload
+    assert_or_refute(expected, call_armstrong)
+  end
+
+  def call_armstrong
+    "ArmstrongNumbers.include?(#{underscore(input['number'])})"
+  end
+end

exercises/armstrong-numbers/.meta/solutions/armstrong_numbers.rb

@@ -1,5 +1,5 @@
 class ArmstrongNumbers
-  def self.is_valid?(number)
+  def self.include?(number)
     exponent = number.digits.size
 
     number.digits.sum { |digit| digit**exponent } == number

exercises/armstrong-numbers/README.md

@@ -33,6 +33,7 @@ To include color from the command line:
 
     ruby -r minitest/pride armstrong_numbers_test.rb
 
+
 ## Source
 
 Wikipedia [https://en.wikipedia.org/wiki/Narcissistic_number](https://en.wikipedia.org/wiki/Narcissistic_number)

exercises/armstrong-numbers/armstrong_numbers_test.rb

@@ -1,59 +1,50 @@
 require 'minitest/autorun'
 require_relative 'armstrong_numbers'
 
+# Common test data version: 1.1.0 b3c2522
 class ArmstrongNumbersTest < Minitest::Test
-  def test_one_digit_numbers_are_armstrong_numbers
-    assert ArmstrongNumbers.is_valid?(1)
-    assert ArmstrongNumbers.is_valid?(6)
-    assert ArmstrongNumbers.is_valid?(9)
+  def test_zero_is_an_armstrong_number
+    # skip
+    assert ArmstrongNumbers.include?(0)
   end
 
-  def test_two_digit_numbers_aren_t_armstrong_numbers
+  def test_single_digit_numbers_are_armstrong_numbers
     skip
-    refute ArmstrongNumbers.is_valid?(11)
-    refute ArmstrongNumbers.is_valid?(89)
-    refute ArmstrongNumbers.is_valid?(44)
+    assert ArmstrongNumbers.include?(5)
   end
 
-  def test_three_digit_numbers_that_are_armstrong_numbers
+  def test_there_are_no_2_digit_armstrong_numbers
     skip
-    assert ArmstrongNumbers.is_valid?(153)
-    assert ArmstrongNumbers.is_valid?(370)
+    refute ArmstrongNumbers.include?(10)
   end
 
-  def test_three_digit_numbers_that_aren_t_armstrong_numbers
+  def test_three_digit_number_that_is_an_armstrong_number
     skip
-    refute ArmstrongNumbers.is_valid?(555)
-    refute ArmstrongNumbers.is_valid?(662)
+    assert ArmstrongNumbers.include?(153)
   end
 
-  def test_four_digit_number_that_is_armstrong_number
+  def test_three_digit_number_that_is_not_an_armstrong_number
     skip
-    assert ArmstrongNumbers.is_valid?(1_634)
+    refute ArmstrongNumbers.include?(100)
   end
 
-  def test_four_digit_number_that_is_not_armstrong_number
+  def test_four_digit_number_that_is_an_armstrong_number
     skip
-    refute ArmstrongNumbers.is_valid?(9_989)
+    assert ArmstrongNumbers.include?(9_474)
   end
 
-  def test_seven_digit_number_that_is_armstrong_number
+  def test_four_digit_number_that_is_not_an_armstrong_number
     skip
-    assert ArmstrongNumbers.is_valid?(9_926_315)
+    refute ArmstrongNumbers.include?(9_475)
   end
 
-  def test_seven_digit_number_that_is_not_armstrong_number
+  def test_seven_digit_number_that_is_an_armstrong_number
     skip
-    refute ArmstrongNumbers.is_valid?(2_369_989)
+    assert ArmstrongNumbers.include?(9_926_315)
   end
 
-  def test_ten_digit_number_that_is_armstrong_number
+  def test_seven_digit_number_that_is_not_an_armstrong_number
     skip
-    assert ArmstrongNumbers.is_valid?(4_679_307_774)
-  end
-
-  def test_fourteen_digit_number_that_is_armstrong_number
-    skip
-    assert ArmstrongNumbers.is_valid?(28_116_440_335_967)
+    refute ArmstrongNumbers.include?(9_926_314)
   end
 end