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Stored size: 651 Bytes
Contents
describe Integer, "#hilbert?" do
HILBERT = [1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61,65,
69,73,77,81,85,89,93,97,101,105,109,113,117,121,
125,129,133,137,141,145,149,153,157,161,165,169,
173,177,181,185,189]
it "returns true for a Hilbert number" do
HILBERT.each do |number|
number.should be_hilbert
end
end
it "returns false for a non-Hilbert number" do
((1..188).to_a - HILBERT).each do |number|
number.should_not be_hilbert
end
end
it "returns false for a negative number" do
(1..189).each do |number|
(-number).should_not be_hilbert
end
end
end
Version data entries
16 entries across 16 versions & 1 rubygems