Contents

# A000032
LUCAS = [2,1,3,4,7,11,18,29,47,76,123,199,322,521,843,
         1364,2207,3571,5778,9349,15127,24476,39603,64079,
         103682,167761,271443,439204,710647,1149851,
         1860498,3010349,4870847,7881196,12752043,20633239,
         33385282]

describe Integer, "#lucas?" do
  LUCAS.each do |n|
    it "returns true for Lucas number #{n}" do
      n.should be_lucas
    end
  end

  LUCAS.to_seq.invert.sample(10).each do |n|
    it "returns false for non-Lucas number #{n}" do
      n.should_not be_lucas
    end
  end
end

describe Integer, "#lucas" do
  LUCAS.each_with_index do |l, n|
    it "returns #{l} for the #{n}#{n.ordinal} Lucas number" do
      n.lucas.should == l
    end
  end
end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
numb-0.186.0	spec/numb/lucas_spec.rb
numb-0.185.0	spec/numb/lucas_spec.rb
numb-0.184.0	spec/numb/lucas_spec.rb
numb-0.181.0	spec/numb/lucas_spec.rb
numb-0.170.0	spec/numb/lucas_spec.rb