Sha256: 2d6e4e92af98139d2ea544b3a78a4d75eb2f666dab05e499bc9482a54db5b3a5
Contents?: true
Size: 621 Bytes
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Stored size: 621 Bytes
Contents
describe Integer, "#centered_hexagonal?" do
# A003215
@seq = [1,7,19,37,61,91,127,169,217,271,331,397,469,547,
631,721,817,919,1027,1141,1261,1387,1519,1657,
1801,1951,2107,2269,2437,2611,2791,2977,3169,3367,
3571,3781,3997,4219,4447,4681,4921,5167,5419,5677,
5941,6211,6487]
@seq.each do |n|
it "returns true for centered hexagonal number #{n}" do
n.should be_centered_hexagonal
end
end
@seq.to_seq.invert.sample(100).each do |n|
it "returns false for non-centered-hexagonal number #{n}" do
n.should_not be_centered_hexagonal
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems