Sha256: e170316a4ee112a26a3791e98624041371312cb15318dd0adc717d51e5cbd5e1
Contents?: true
Size: 610 Bytes
Versions: 8
Compression:
Stored size: 610 Bytes
Contents
describe Integer, "#centered_pentagonal?" do
# A005891
@seq = [1,6,16,31,51,76,106,141,181,226,276,331,391,456,
526,601,681,766,856,951,1051,1156,1266,1381,1501,
1626,1756,1891,2031,2176,2326,2481,2641,2806,2976,
3151,3331,3516,3706,3901,4101,4306,4516,4731,4951,
5176,5406]
@seq.each do |n|
it "returns true for centered pentagonal #{n}" do
n.should be_centered_pentagonal
end
end
@seq.to_seq.invert.sample(100).each do |n|
it "returns false for non-centered-pentagonal #{n}" do
n.should_not be_centered_pentagonal
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems