Sha256: 5e72d8c89a0fd7cdd50d288b332cd1dfd1f65449a3c181d358fd37d781d0652b
Contents?: true
Size: 590 Bytes
Versions: 9
Compression:
Stored size: 590 Bytes
Contents
require 'spec_helper'
module Alf
class Aggregator
describe Stddev do
let(:rel){[
{:qty => 10},
{:qty => 20},
{:qty => 30},
{:qty => 40}
]}
let(:expected) {
Math.sqrt(Variance.new{qty}.aggregate(rel))
}
it 'should work when used standalone' do
Stddev.new{ qty }.aggregate(rel).should eq(expected)
end
it 'should install factory methods' do
Aggregator.stddev{ qty }.should be_a(Stddev)
Aggregator.stddev{ qty }.aggregate(rel).should eq(expected)
end
end
end
end
Version data entries
9 entries across 9 versions & 2 rubygems