require File.expand_path(File.dirname(__FILE__)+"/spec_helper.rb")
require "distribution/weibull"

include ExampleWithGSL

describe Distribution::Weibull do

	 #shared_examples for "Weibull engine" do
	        it "should return correct pdf" do
		   Distribution::Weibull::pdf(2, 1, 1).should be_within(1e-3).of(0.13533)
		end
	 	it "should return correct cdf" do 
		   Distribution::Weibull::cdf(2, 1, 1).should be_within(1e-3).of(0.86466)
		end
		it "should return correct p-value" do 
		   Distribution::Weibull::p_value(0.86466, 1, 1).should be_within(1e-3).of(2.0)
		end
	 #end
end