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Contents
describe Integer, "#heptagonal?" do
# A000566
@seq = [0,1,7,18,34,55,81,112,148,189,235,286,342,403,
469,540,616,697,783,874,970,1071,1177,1288,1404,
1525,1651,1782,1918,2059,2205,2356,2512,2673,2839,
3010,3186,3367,3553,3744,3940,4141,4347,4558,4774,
4995,5221,5452,5688].to_seq
@seq.each do |n|
it "returns true for heptagonal number #{n}" do
n.should be_heptagonal
end
end
@seq.invert.sample(10).each do |n|
it "returns false for non-heptagonal number #{n}" do
n.should_not be_heptagonal
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems