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Size: 412 Bytes
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Stored size: 412 Bytes
Contents
describe Integer, "#dudeney?" do
it "returns true for Dudeney numbers" do
# http://www.research.att.com/~njas/sequences/A061209
[1, 512, 4913, 5832, 17576, 19683].each do |number|
number.should be_dudeney
end
end
it "returns false for non-Dudeney numbers" do
[2, 511, 444444, 196833, 373627919182666355532718191].each do |number|
number.should_not be_dudeney
end
end
end
Version data entries
16 entries across 16 versions & 1 rubygems