Sha256: 696bd38234fa67b97b14ac17a4dd76f331d21981d8738c29d5626fc9e11e983b
Contents?: true
Size: 901 Bytes
Versions: 5
Compression:
Stored size: 901 Bytes
Contents
# coding: utf-8
# A007588
STELLA_OCTANGULA = [0,1,14,51,124,245,426,679,1016,1449,1990,2651,
3444,4381,5474,6735,8176,9809,11646,13699,15980,
18501,21274,24311,27624,31225,35126,39339,43876,
48749,53970,59551,65504,71841,78574,85715,93276,
101269]
describe Integer, "#stella_octangula" do
STELLA_OCTANGULA.each_with_index do |o,n|
it "returns #{o} as the #{n}#{n.ordinal} stella octangula number" do
n.stella_octangula.should == o
end
end
end
describe Integer, "#stella_octangula?" do
STELLA_OCTANGULA.each do |n|
it "returns true for stella octangula number #{n}" do
n.should be_stella_octangula
end
end
STELLA_OCTANGULA.to_seq.invert.sample(100).each do |n|
it "returns false for non-stella-octangula number #{n}" do
n.should_not be_stella_octangula
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems