spec/kaprekar_spec.rb in numb-0.21.0 vs spec/kaprekar_spec.rb in numb-0.63.0

@@ -1,20 +1,21 @@
 describe Integer, "#kaprekar?" do
-  KAPREKAR = [1,9,45,55,99,297,703,999,2223,2728,4879,4950,
-              5050,5292,7272,7777,9999,17344,22222,38962,77778,
-              82656,95121,99999,142857,148149,181819,187110,
-              208495,318682,329967,351352,356643,390313,461539,
-              466830,499500,500500,533170]
+  # A006886
+  @seq = [1,9,45,55,99,297,703,999,2223,2728,4879,4950,
+          5050,5292,7272,7777,9999,17344,22222,38962,77778,
+          82656,95121,99999,142857,148149,181819,187110,
+          208495,318682,329967,351352,356643,390313,461539,
+          466830,499500,500500,533170].to_seq
 
-  it "returns true for Kaprekar numbers" do
-    KAPREKAR.each do |number|
-      number.should be_kaprekar
+  @seq.each do |n|
+    it "returns true for Kaprekar number #{n}" do
+      n.should be_kaprekar
     end
   end
 
-  it "returns false for non-Kaprekar numbers" do
-    ((1..300).to_a - KAPREKAR).each do |number|
-      number.should_not be_kaprekar
+  @seq.invert.sample(10).each do |n|
+    it "returns false for non-Kaprekar number #{n}" do
+      n.should_not be_kaprekar
     end
   end
 
   it "returns false for negative numbers" do
     [-5, -9, -297, -345].each do |number|