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// Copyright 2016 The Internal Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package buffer // import "modernc.org/internal/buffer"
import (
"bytes"
"fmt"
"math/rand"
"os"
"path"
"runtime"
"strings"
"testing"
)
func caller(s string, va ...interface{}) {
if s == "" {
s = strings.Repeat("%v ", len(va))
}
_, fn, fl, _ := runtime.Caller(2)
fmt.Fprintf(os.Stderr, "caller: %s:%d: ", path.Base(fn), fl)
fmt.Fprintf(os.Stderr, s, va...)
fmt.Fprintln(os.Stderr)
_, fn, fl, _ = runtime.Caller(1)
fmt.Fprintf(os.Stderr, "\tcallee: %s:%d: ", path.Base(fn), fl)
fmt.Fprintln(os.Stderr)
os.Stderr.Sync()
}
func dbg(s string, va ...interface{}) {
if s == "" {
s = strings.Repeat("%v ", len(va))
}
_, fn, fl, _ := runtime.Caller(1)
fmt.Fprintf(os.Stderr, "dbg %s:%d: ", path.Base(fn), fl)
fmt.Fprintf(os.Stderr, s, va...)
fmt.Fprintln(os.Stderr)
os.Stderr.Sync()
}
func TODO(...interface{}) string { //TODOOK
_, fn, fl, _ := runtime.Caller(1)
return fmt.Sprintf("TODO: %s:%d:\n", path.Base(fn), fl) //TODOOK
}
func use(...interface{}) {}
func init() {
use(caller, dbg, TODO) //TODOOK
}
// ============================================================================
func test(t testing.TB, allocs, goroutines int) {
ready := make(chan int, goroutines)
run := make(chan int)
done := make(chan int, goroutines)
for i := 0; i < goroutines; i++ {
go func() {
a := rand.Perm(allocs)
ready <- 1
<-run
for _, v := range a {
p := Get(v)
b := *p
if g, e := len(b), v; g != e {
t.Error(g, e)
break
}
Put(p)
}
done <- 1
}()
}
for i := 0; i < goroutines; i++ {
<-ready
}
close(run)
for i := 0; i < goroutines; i++ {
<-done
}
}
func Test2(t *testing.T) {
test(t, 1<<15, 32)
}
func Benchmark1(b *testing.B) {
const (
allocs = 1000
goroutines = 100
)
for i := 0; i < b.N; i++ {
test(b, allocs, goroutines)
}
b.SetBytes(goroutines * (allocs*allocs + allocs) / 2)
}
func TestBytes(t *testing.T) {
const N = 1e6
src := make([]byte, N)
for i := range src {
src[i] = byte(rand.Int())
}
var b Bytes
for i, v := range src {
b.WriteByte(v)
if g, e := b.Len(), i+1; g != e {
t.Fatal("Len", g, e)
}
}
if !bytes.Equal(b.Bytes(), src) {
t.Fatal("content differs")
}
b.Close()
if g, e := b.Len(), 0; g != e {
t.Fatal("Len", g, e)
}
if g, e := len(b.Bytes()), 0; g != e {
t.Fatal("Bytes", g, e)
}
s2 := src
for len(s2) != 0 {
n := rand.Intn(127)
if n > len(s2) {
n = len(s2)
}
n2, _ := b.Write(s2[:n])
if g, e := n2, n; g != e {
t.Fatal("Write", g, e)
}
s2 = s2[n:]
}
if !bytes.Equal(b.Bytes(), src) {
t.Fatal("content differs")
}
b.Close()
s2 = src
for len(s2) != 0 {
n := rand.Intn(31)
if n > len(s2) {
n = len(s2)
}
n2, _ := b.WriteString(string(s2[:n]))
if g, e := n2, n; g != e {
t.Fatal("Write", g, e)
}
s2 = s2[n:]
}
if !bytes.Equal(b.Bytes(), src) {
t.Fatal("content differs")
}
}
func benchmarkWriteByte(b *testing.B, n int) {
for i := 0; i < b.N; i++ {
var buf Bytes
for j := 0; j < n; j++ {
buf.WriteByte(0)
}
buf.Close()
}
b.SetBytes(int64(n))
}
func BenchmarkWriteByte_1e3(b *testing.B) { benchmarkWriteByte(b, 1e3) }
func BenchmarkWriteByte_1e4(b *testing.B) { benchmarkWriteByte(b, 1e4) }
func BenchmarkWriteByte_1e5(b *testing.B) { benchmarkWriteByte(b, 1e5) }
func BenchmarkWriteByte_1e6(b *testing.B) { benchmarkWriteByte(b, 1e6) }
func BenchmarkWriteByte_1e7(b *testing.B) { benchmarkWriteByte(b, 1e7) }
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