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Contents
require 'spec_helper'
describe Metrics::Statistics::UniformSample do
before(:each) do
end
it "should have a size equal to the initialization parameter" do
sample = Metrics::Statistics::UniformSample.new(100)
sample.size.should == 100
end
it "should allocate an array of the requested size" do
sample = Metrics::Statistics::UniformSample.new(100)
sample.values.length.should == 100
sample.values.each do |value|
value.should == 0
end
end
it "should update at the end of the list" do
sample = Metrics::Statistics::UniformSample.new(100)
(1..100).each do |i|
sample.update(i)
end
values = sample.values
(0..99).each do |index|
values[index].should == (index + 1)
end
end
it "should update a random entry in the list when it's full" do
sample = Metrics::Statistics::UniformSample.new(100)
sample.should_receive(:rand).with(any_args()).and_return(50)
(1..101).each do |i|
sample.update(i)
end
values = sample.values
(0..49).each do |index|
values[index].should == (index + 1)
end
values[50].should == 101
(51..99).each do |index|
values[index].should == (index + 1)
end
end
end
Version data entries
15 entries across 15 versions & 2 rubygems