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|
package movingaverage
// @author Robin Verlangen
// Test the moving average for Go package
import (
"math"
"sync"
"testing"
)
func TestMovingAverage(t *testing.T) {
a := New(5)
if a.Avg() != 0 {
t.Error("expected 0", a.Avg())
}
if a.SlotsFilled() {
t.Error("should not be full yet")
}
a.Add(2)
if a.Avg() < 1.999 || a.Avg() > 2.001 {
t.Fail()
}
a.Add(4)
a.Add(2)
if a.Avg() < 2.665 || a.Avg() > 2.667 {
t.Fail()
}
a.Add(4)
a.Add(2)
if a.Avg() < 2.799 || a.Avg() > 2.801 {
t.Fail()
}
if !a.SlotsFilled() {
t.Error("should be full")
}
// This one will go into the first slot again
// evicting the first value
a.Add(10)
if a.Avg() < 4.399 || a.Avg() > 4.401 {
t.Fail()
}
// test variadic add
a.Add(2, 4)
// get values
values := a.Values()
if len(values) != 5 {
t.Error()
}
}
func TestNaN(t *testing.T) {
a := New(5)
a.Add(1)
a.Add(math.NaN())
if !math.IsNaN(a.Avg()) {
t.Error()
}
}
func TestNaNIgnore(t *testing.T) {
a := New(5)
a.SetIgnoreNanValues(true)
a.Add(1)
a.Add(math.NaN())
if math.IsNaN(a.Avg()) {
t.Error()
}
if a.Avg() != 1 {
t.Error(a.Avg())
}
}
func TestInf(t *testing.T) {
a := New(5)
a.Add(1)
a.Add(math.Inf(1))
if !math.IsInf(a.Avg(), 0) {
t.Error()
}
}
func TestInfIgnore(t *testing.T) {
a := New(5)
a.SetIgnoreInfValues(true)
a.Add(1)
a.Add(math.Inf(1))
if math.IsInf(a.Avg(), 0) {
t.Error()
}
if a.Avg() != 1 {
t.Error(a.Avg())
}
}
func TestMax(t *testing.T) {
a := New(5)
if max, err := a.Max(); max != 0 || err == nil {
t.Error(max, err)
}
a.Add(10)
if max, err := a.Max(); max != 10 || err != nil {
t.Error(max, err)
}
a.Add(100, 10000, 1000)
if max, err := a.Max(); max != 10000 || err != nil {
t.Error(max, err)
}
}
func TestMin(t *testing.T) {
a := New(5)
if min, err := a.Min(); min != 0 || err == nil {
t.Error(min, err)
}
a.Add(10)
if min, err := a.Min(); min != 10 || err != nil {
t.Error(min, err)
}
a.Add(100, 10000, 1000)
if min, err := a.Min(); min != 10 || err != nil {
t.Error(min, err)
}
}
func TestCount(t *testing.T) {
a := New(5)
if a.Count() != 0 {
t.Error(a.Count())
}
a.Add(5)
if a.Count() != 1 {
t.Error(a.Count())
}
a.Add(3, 6)
if a.Count() != 3 {
t.Error(a.Count())
}
a.Add(1, 2, 3, 4, 5)
if a.Count() != 5 {
t.Error(a.Count())
}
}
func TestConcurrent(t *testing.T) {
// this test needs to be run with -race flag
a := Concurrent(New(5))
const numRoutines = 5
wg := sync.WaitGroup{}
wg.Add(numRoutines)
for i := 0; i < numRoutines; i++ {
go func() {
for n := 0; n < 10; n++ {
a.Add(float64(n))
}
a.Avg()
a.Min()
a.Max()
a.Count()
a.Values()
a.SlotsFilled()
wg.Done()
}()
}
wg.Wait()
}
|
