package main

import (
	"testing"
)

func TestNewStats(t *testing.T) {
	s := NewStatAggregator()
	if s.n != 0 ||
		s.sum != 0 ||
		s.sumOfTheSquares != 0 ||
		len(s.histogram) != initialLength ||
		s.min != veryBig ||
		s.max != verySmall {
		t.Fail()
	}
}

func TestAddStatsBasic(t *testing.T) {

	numbers := []float64{-1, 1, 20, 3}
	c := make(chan float64)
	o := make(chan *Stats)
	s := NewStatAggregator()
	go s.AddStats(c, o)
	for _, n := range numbers {
		c <- n
	}
	close(c)
	<-o
	if s.n != 4. || s.min != -1. || s.max != 20. || s.sum != 23. || s.sumOfTheSquares != 411. {
		t.Error(">>>", s.max, s.min)
	}

}