Sha256: 42bac823fabb7669f3292fe43b5957330969578ddf6d4439a5ba99b2bc799c3d
Contents?: true
Size: 1009 Bytes
Versions: 11
Compression:
Stored size: 1009 Bytes
Contents
describe Integer, "#factorial" do
# A000142
@seq = [1,1,2,6,24,120,720,5040,40320,362880,3628800,
39916800,479001600,6227020800,87178291200,
1307674368000,20922789888000,355687428096000,
6402373705728000,121645100408832000,
2432902008176640000]
@seq.each_with_index do |factorial, n|
it "should return #{factorial} for #{n}!" do
n.factorial.should == factorial
end
end
end
describe Integer, "#factorial?" do
# A000142
@seq = [1,1,2,6,24,120,720,5040,40320,362880,3628800,
39916800,479001600,6227020800,87178291200,
1307674368000,20922789888000,355687428096000,
6402373705728000,121645100408832000,
2432902008176640000]
@seq.first(10).each do |n|
it "should return true for factorial #{n}" do
n.should be_factorial
end
end
@seq.first(10).to_seq.invert.sample(10).each do |n|
it "should return false for non-factorial #{n}" do
n.should_not be_factorial
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems