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

@@ -1,24 +1,28 @@
 describe Integer, "#cube?" do
   # A000578 
-  CUBES = [0,1,8,27,64,125,216,343,512,729,1000,1331,1728,
-           2197,2744,3375,4096,4913,5832,6859,8000,9261,
+  @seq = [0,1,8,27,64,125,216,343,512,729,1000,1331,1728,
+          2197,2744,3375,4096,4913,5832,6859,8000,9261,
           10648,12167,13824,15625,17576,19683,21952,24389,
           27000,29791,32768,35937,39304,42875,46656,50653,
-          54872,59319,64000]
+          54872,59319,64000].to_seq
 
-  it "returns true for perfect cubes" do
-    CUBES.each{|n| n.should be_cube}
-  end
+  @seq.each do |n|
+    it "returns true for perfect cube #{n}" do
+      n.should be_cube
+    end
 
-  it "returns true for negative perfect cubes" do
-    CUBES.shuffle.first(10).each{|n| (-n).should be_cube}
+    it "returns true for negative perfect cube #{-n}" do
+      (-n).should be_cube
+    end
   end
 
-  it "returns false for non-perfect cubes" do
-    ((0..CUBES.last).to_a - CUBES).shuffle.first(10).each{|n| n.should_not be_cube}
-  end
+  @seq.invert.sample(10).each do |n|
+    it "returns false for non-cube #{n}" do
+      n.should_not be_cube
+    end
 
-  it "returns false for negative non-perfect cubes" do
-    ((0..CUBES.last).to_a - CUBES).shuffle.first(10).each{|n| (-n).should_not be_cube}
+    it "returns false for negative non-cube #{-n}" do
+      (-n).should_not be_cube
+    end
   end
 end