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require File.expand_path(File.dirname(__FILE__) + '/spec_helper.rb')
include ExampleWithGSL
describe Distribution::F do
shared_examples_for 'F engine (with rng)' do
it 'should return correct rng' do
pending
end
end
shared_examples_for 'F engine (with pdf)' do
it_only_with_gsl 'should return correct pdf' do
if @engine.respond_to? :pdf
[0.1, 0.5, 1, 2, 10, 20, 30].each do |x|
[2, 5, 10].product([2, 5, 10]).each do |n, m|
expected_value = GSL::Ran.fdist_pdf(x, n, m)
expect(@engine.pdf(x, n, m)).to be_within(1e-4).of(expected_value)
end
end
else
pending("No #{@engine}.pdf")
end
end
end
shared_examples_for 'F engine' do
it_only_with_gsl 'should return correct cdf' do
if @engine.respond_to? :cdf
[0.1, 0.5, 1, 2, 10, 20, 30].each do |f|
[2, 5, 10].each do |n2|
[2, 5, 10].each do |n1|
expect(@engine.cdf(f, n1, n2)).to be_within(1e-4).of(GSL::Cdf.fdist_P(f, n1, n2))
end
end
end
else
pending("No #{@engine}.cdf")
end
end
it_only_with_gsl 'should return correct p_value', focus: true do
if @engine.respond_to? :p_value
expected_value = GSL::Cdf.fdist_Pinv(0.975, 5, 4.189092917592713)
expect(@engine.p_value(0.975, 5, 4.189092917592713)).to be_within(1e-4).of(expected_value)
[0.1, 0.5, 1, 2, 10, 20, 30].each do |f|
[2, 5, 10].each do |n2|
[2, 5, 10].each do |n1|
area = @engine.cdf(f, n1, n2)
expected_value = GSL::Cdf.fdist_Pinv(area, n1, n2)
expect(@engine.p_value(area, n1, n2)).to be_within(1e-4).of(expected_value)
end
end
end
else
pending("No #{@engine}.p_value")
end
end
end
describe 'singleton' do
before do
@engine = Distribution::F
end
it_should_behave_like 'F engine'
it_should_behave_like 'F engine (with pdf)'
end
describe Distribution::F::Ruby_ do
before do
@engine = Distribution::F::Ruby_
end
it_should_behave_like 'F engine'
it_should_behave_like 'F engine (with pdf)'
end
if Distribution.has_gsl?
describe Distribution::F::GSL_ do
before do
@engine = Distribution::F::GSL_
end
it_should_behave_like 'F engine'
it_should_behave_like 'F engine (with pdf)'
end
end
if Distribution.has_statistics2?
describe Distribution::F::Statistics2_ do
before do
@engine = Distribution::F::Statistics2_
end
it_should_behave_like 'F engine'
end
end
if Distribution.has_java?
describe Distribution::F::Java_ do
before do
@engine = Distribution::F::Java_
end
it_should_behave_like 'F engine'
it_should_behave_like 'F engine (with pdf)'
end
end
end
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