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|
package xdelta
import (
"bufio"
"bytes"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path"
"sync/atomic"
"golang.org/x/sys/unix"
)
var (
tmpDir = "/tmp"
srcSeq int64
)
type Program struct {
Path string
}
type Run struct {
Cmd exec.Cmd
Srcfile string
Stdin io.WriteCloser
Srcin io.WriteCloser
Stdout io.ReadCloser
Stderr io.ReadCloser
}
func (t *TestGroup) Drain(f io.ReadCloser, desc string) <-chan []byte {
c := make(chan []byte)
t.Go(desc, func(g Goroutine) {
if b, err := ioutil.ReadAll(f); err != nil {
fmt.Println("Drain", err)
g.Panic(err)
} else {
c <- b
}
g.OK()
})
return c
}
func (t *TestGroup) Empty(f io.ReadCloser, desc string) {
t.Go(desc, func (g Goroutine) {
g.OK()
s := bufio.NewScanner(f)
for s.Scan() {
os.Stderr.Write([]byte(fmt.Sprint(desc, ": ", s.Text(), "\n")))
}
err := s.Err()
f.Close()
if err != nil {
fmt.Println("Empty", desc, err)
g.Panic(err)
}
})
}
func TestWrite(what string, f io.WriteCloser, b []byte) error {
if _, err := f.Write(b); err != nil {
fmt.Println("Write", err)
return errors.New(fmt.Sprint(what, ":", err))
}
if err := f.Close(); err != nil {
fmt.Println("Close", err)
return errors.New(fmt.Sprint(what, ":", err))
}
return nil
}
func (t *TestGroup) CopyStreams(r io.ReadCloser, w io.WriteCloser) {
t.Go("copy", func(g Goroutine) {
_, err := io.Copy(w, r)
if err != nil {
fmt.Println("CopyS", err)
g.Panic(err)
}
err = r.Close()
if err != nil {
fmt.Println("CloseS1", err)
g.Panic(err)
}
err = w.Close()
if err != nil {
fmt.Println("CloseS2", err)
g.Panic(err)
}
g.OK()
})
}
func (t *TestGroup) CompareStreams(r1 io.ReadCloser, r2 io.ReadCloser, length int64) {
t.Go("compare", func(g Goroutine) {
b1 := make([]byte, blocksize)
b2 := make([]byte, blocksize)
var idx int64
for length > 0 {
c := blocksize
if length < blocksize {
c = int(length)
}
if _, err := io.ReadFull(r1, b1[0:c]); err != nil {
fmt.Println("ReadFull1", err)
g.Panic(err)
}
if _, err := io.ReadFull(r2, b2[0:c]); err != nil {
fmt.Println("ReadFull2", err)
g.Panic(err)
}
if bytes.Compare(b1[0:c], b2[0:c]) != 0 {
fmt.Println("B1 is", string(b1[0:c]))
fmt.Println("B2 is", string(b2[0:c]))
g.Panic(errors.New(fmt.Sprint("Bytes do not compare at ", idx)))
}
length -= int64(c)
idx += int64(c)
}
g.OK()
})
}
func (t *TestGroup) Exec(desc string, p *Program, srcfifo bool, flags []string) (*Run, error) {
var err error
run := &Run{}
args := []string{p.Path}
if srcfifo {
num := atomic.AddInt64(&srcSeq, 1)
run.Srcfile = path.Join(t.Runner.Testdir, fmt.Sprint("source", num))
if err = unix.Mkfifo(run.Srcfile, 0600); err != nil {
return nil, err
}
// Because OpenFile blocks on the Fifo until the reader
// arrives, a pipe to defer open
read, write := io.Pipe()
run.Srcin = write
go writeFifo(run.Srcfile, read)
args = append(args, "-s")
args = append(args, run.Srcfile)
}
if run.Stdin, err = run.Cmd.StdinPipe(); err != nil {
return nil, err
}
if run.Stdout, err = run.Cmd.StdoutPipe(); err != nil {
return nil, err
}
if run.Stderr, err = run.Cmd.StderrPipe(); err != nil {
return nil, err
}
run.Cmd.Path = p.Path
run.Cmd.Args = append(args, flags...)
run.Cmd.Dir = t.Runner.Testdir
if serr := run.Cmd.Start(); serr != nil {
return nil, serr
}
t.Go("exec-wait:" + desc, func (g Goroutine) {
if err := run.Cmd.Wait(); err != nil {
g.Panic(err)
}
g.OK()
})
return run, nil
}
func writeFifo(srcfile string, read io.Reader) error {
fifo, err := os.OpenFile(srcfile, os.O_WRONLY, 0600)
if err != nil {
fifo.Close()
return err
}
if _, err := io.Copy(fifo, read); err != nil {
fifo.Close()
return err
}
return fifo.Close()
}
|
