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package search
import (
"fmt"
"testing"
"github.com/snonux/algorithms/ds"
"github.com/snonux/algorithms/sort"
)
const factor int = 10
const minLength int = 1
const maxLength int = 10000
// Store results here to avoid compiler optimizations
var benchResult int
func TestElementary(t *testing.T) {
for i := minLength; i <= maxLength; i *= factor {
test(NewElementary(), i, t)
}
}
func TestBST(t *testing.T) {
for i := minLength; i <= maxLength; i *= factor {
test(NewBST(), i, t)
}
}
func TestRedBlackBST(t *testing.T) {
for i := minLength; i <= maxLength; i *= factor {
test(NewRedBlackBST(), i, t)
}
}
func TestHash(t *testing.T) {
for i := minLength; i <= maxLength; i *= factor {
test(NewHash(i*2), i, t)
}
}
func TestGoMap(t *testing.T) {
for i := minLength; i <= maxLength; i *= factor {
test(NewGoMap(), i, t)
}
}
func test(s Put, l int, t *testing.T) {
keys := ds.NewRandomArrayList(l, l)
randoms := ds.NewRandomArrayList(l, -1)
mapping := make(map[int]int, l)
get := func(key int, del bool) int {
var val int
var err error
switch {
case del:
defer delete(mapping, key)
val, err = s.Del(key)
//t.Log("Del", key, val, err)
default:
val, err = s.Get(key)
//t.Log("Get", key, val, err)
}
if mVal, ok := mapping[key]; ok {
if err != nil {
t.Error("Could not get element", key, val, mVal, err)
}
if mVal != val {
t.Error("Got wrong value for element", key, val, mVal)
}
return val
}
if err == nil {
t.Error("Got element but expected not to", key, val)
}
return val
}
testGet := func(key int) int { return get(key, false) }
testDel := func(key int) int { return get(key, true) }
testPut := func(key, val int) {
s.Put(key, val)
mapping[key] = val
//t.Log("Put", key, val)
testGet(key)
}
//t.Log("Put random key-values", l)
var prevKey int
for _, key := range sort.Shuffle(keys) {
testPut(key, randoms[key])
testGet(prevKey)
prevKey = key
}
//t.Log("Del random key-values", l)
for _, key := range sort.Shuffle(keys) {
testDel(key)
testGet(prevKey)
prevKey = key
}
if !s.Empty() {
t.Error("Expected set to be empty", l)
}
}
func BenchmarkElementary(t *testing.B) {
s := NewElementary()
for i := minLength; i <= maxLength; i *= factor {
benchmark(s, i, t)
}
}
func BenchmarkBST(t *testing.B) {
s := NewBST()
for i := minLength; i <= maxLength; i *= factor {
benchmark(s, i, t)
}
}
func BenchmarkRedBlackBST(t *testing.B) {
s := NewRedBlackBST()
for i := minLength; i <= maxLength; i *= factor {
benchmark(s, i, t)
}
}
func BenchmarkHash(t *testing.B) {
s := NewHash(maxLength * 2)
for i := minLength; i <= maxLength; i *= factor {
benchmark(s, i, t)
}
}
func BenchmarkGoMap(t *testing.B) {
s := NewGoMap()
for i := minLength; i <= maxLength; i *= factor {
benchmark(s, i, t)
}
}
func benchmark(s Put, l int, b *testing.B) {
list := ds.NewRandomArrayList(l, -1)
b.Run(fmt.Sprintf("random(%d)", l), func(b *testing.B) {
b.ResetTimer()
for i, a := range list {
s.Put(a, i)
}
for _, a := range list {
benchResult, _ = s.Get(a)
}
})
}
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