Pr-10

roman.rb

@@ -0,0 +1,30 @@
+class Fixnum
+
+  def roman
+    {
+      1000 => "M",  
+      900  => "CM",  
+      500  => "D",  
+      400  => "CD",
+      100  => "C",  
+      90   => "XC",  
+      50   => "L",  
+      40   => "XL",  
+      10   => "X",  
+      9    => "IX",  
+      5    => "V",  
+      4    => "IV",  
+      1    => "I"  
+    }
+  end
+
+  def to_roman
+    n = self
+    result = ""
+    roman.each do |num, letter|
+      result << letter * (n / num)
+      n = n % num
+    end
+    return result
+  end
+end

roman_test.rb

@@ -0,0 +1,95 @@
+require 'minitest/autorun'
+require_relative 'roman_numerals'
+
+# Common test data version: 1.0.0 070e8d5
+class RomanNumeralsTest < Minitest::Test
+  def test_1
+    # skip
+    assert_equal 'I', 1.to_roman
+  end
+
+  def test_2
+    skip
+    assert_equal 'II', 2.to_roman
+  end
+
+  def test_3
+    skip
+    assert_equal 'III', 3.to_roman
+  end
+
+  def test_4
+    skip
+    assert_equal 'IV', 4.to_roman
+  end
+
+  def test_5
+    skip
+    assert_equal 'V', 5.to_roman
+  end
+
+  def test_6
+    skip
+    assert_equal 'VI', 6.to_roman
+  end
+
+  def test_9
+    skip
+    assert_equal 'IX', 9.to_roman
+  end
+
+  def test_27
+    skip
+    assert_equal 'XXVII', 27.to_roman
+  end
+
+  def test_48
+    skip
+    assert_equal 'XLVIII', 48.to_roman
+  end
+
+  def test_59
+    skip
+    assert_equal 'LIX', 59.to_roman
+  end
+
+  def test_93
+    skip
+    assert_equal 'XCIII', 93.to_roman
+  end
+
+  def test_141
+    skip
+    assert_equal 'CXLI', 141.to_roman
+  end
+
+  def test_163
+    skip
+    assert_equal 'CLXIII', 163.to_roman
+  end
+
+  def test_402
+    skip
+    assert_equal 'CDII', 402.to_roman
+  end
+
+  def test_575
+    skip
+    assert_equal 'DLXXV', 575.to_roman
+  end
+
+  def test_911
+    skip
+    assert_equal 'CMXI', 911.to_roman
+  end
+
+  def test_1024
+    skip
+    assert_equal 'MXXIV', 1024.to_roman
+  end
+
+  def test_3000
+    skip
+    assert_equal 'MMM', 3000.to_roman
+  end
+end