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Contents
describe Integer, "#betrothed?" do
# A005276, augmented with http://djm.cc/reduced.fmtlist
@seq = [[48, 75],
[140, 195],
[1050, 1925],
[1575, 1648],
[2024, 2295],
[5775, 6128],
[8892, 16587],
[9504, 20735],
[62744, 75495],
[186615, 206504],
[196664, 219975],
[199760, 309135],
[266000, 507759],
[312620, 549219],
[526575, 544784],
[573560, 817479],
[587460, 1057595],
[1000824, 1902215],
[1081184, 1331967],
[1139144, 1159095],
[1140020, 1763019],
[1173704, 1341495],
[1208504, 1348935],
[1233056, 1524831],
[1236536, 1459143],
[1279950, 2576945],
[1921185, 2226014],
[2036420, 2681019],
[2102750, 2142945],
[2140215, 2421704],
]
@seq.each do |n, m|
it "returns true for betrothed pair #{n}, #{m}" do
n.should be_betrothed(m)
m.should be_betrothed(n)
end
end
@seq.each do |n, m|
n -= 1
it "returns false for non-betrothed pair #{n}, #{m}" do
n.should_not be_betrothed(m)
m.should_not be_betrothed(n)
end
end
10.times do
n, m = 2.times.map{ Random.new.rand(@seq.last.max) }
redo if @seq.include?([n, m])
it "returns false for non-betrothed pair #{n}, #{m}" do
n.should_not be_betrothed(m)
m.should_not be_betrothed(n)
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems