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moby--moby/pkg/ioutils/readers_test.go
root 9ca913d0f1 Go Scheduler issue with sync.Mutex using gccgo
Signed-off-by: Srini Brahmaroutu <srbrahma@us.ibm.com>
2015-07-17 01:33:58 +00:00

216 lines
4.9 KiB
Go

package ioutils
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"strings"
"testing"
)
// Implement io.Reader
type errorReader struct{}
func (r *errorReader) Read(p []byte) (int, error) {
return 0, fmt.Errorf("Error reader always fail.")
}
func TestReadCloserWrapperClose(t *testing.T) {
reader := strings.NewReader("A string reader")
wrapper := NewReadCloserWrapper(reader, func() error {
return fmt.Errorf("This will be called when closing")
})
err := wrapper.Close()
if err == nil || !strings.Contains(err.Error(), "This will be called when closing") {
t.Fatalf("readCloserWrapper should have call the anonymous func and thus, fail.")
}
}
func TestReaderErrWrapperReadOnError(t *testing.T) {
called := false
reader := &errorReader{}
wrapper := NewReaderErrWrapper(reader, func() {
called = true
})
_, err := wrapper.Read([]byte{})
if err == nil || !strings.Contains(err.Error(), "Error reader always fail.") {
t.Fatalf("readErrWrapper should returned an error")
}
if !called {
t.Fatalf("readErrWrapper should have call the anonymous function on failure")
}
}
func TestReaderErrWrapperRead(t *testing.T) {
reader := strings.NewReader("a string reader.")
wrapper := NewReaderErrWrapper(reader, func() {
t.Fatalf("readErrWrapper should not have called the anonymous function")
})
// Read 20 byte (should be ok with the string above)
num, err := wrapper.Read(make([]byte, 20))
if err != nil {
t.Fatal(err)
}
if num != 16 {
t.Fatalf("readerErrWrapper should have read 16 byte, but read %d", num)
}
}
func TestNewBufReaderWithDrainbufAndBuffer(t *testing.T) {
reader, writer := io.Pipe()
drainBuffer := make([]byte, 1024)
buffer := bytes.Buffer{}
bufreader := NewBufReaderWithDrainbufAndBuffer(reader, drainBuffer, &buffer)
// Write everything down to a Pipe
// Usually, a pipe should block but because of the buffered reader,
// the writes will go through
done := make(chan bool)
go func() {
writer.Write([]byte("hello world"))
writer.Close()
done <- true
}()
// Drain the reader *after* everything has been written, just to verify
// it is indeed buffering
<-done
output, err := ioutil.ReadAll(bufreader)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(output, []byte("hello world")) {
t.Error(string(output))
}
}
func TestBufReader(t *testing.T) {
reader, writer := io.Pipe()
bufreader := NewBufReader(reader)
// Write everything down to a Pipe
// Usually, a pipe should block but because of the buffered reader,
// the writes will go through
done := make(chan bool)
go func() {
writer.Write([]byte("hello world"))
writer.Close()
done <- true
}()
// Drain the reader *after* everything has been written, just to verify
// it is indeed buffering
<-done
output, err := ioutil.ReadAll(bufreader)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(output, []byte("hello world")) {
t.Error(string(output))
}
}
func TestBufReaderCloseWithNonReaderCloser(t *testing.T) {
reader := strings.NewReader("buffer")
bufreader := NewBufReader(reader)
if err := bufreader.Close(); err != nil {
t.Fatal(err)
}
}
// implements io.ReadCloser
type simpleReaderCloser struct{}
func (r *simpleReaderCloser) Read(p []byte) (n int, err error) {
return 0, nil
}
func (r *simpleReaderCloser) Close() error {
return nil
}
func TestBufReaderCloseWithReaderCloser(t *testing.T) {
reader := &simpleReaderCloser{}
bufreader := NewBufReader(reader)
err := bufreader.Close()
if err != nil {
t.Fatal(err)
}
}
func TestHashData(t *testing.T) {
reader := strings.NewReader("hash-me")
actual, err := HashData(reader)
if err != nil {
t.Fatal(err)
}
expected := "sha256:4d11186aed035cc624d553e10db358492c84a7cd6b9670d92123c144930450aa"
if actual != expected {
t.Fatalf("Expecting %s, got %s", expected, actual)
}
}
type repeatedReader struct {
readCount int
maxReads int
data []byte
}
func newRepeatedReader(max int, data []byte) *repeatedReader {
return &repeatedReader{0, max, data}
}
func (r *repeatedReader) Read(p []byte) (int, error) {
if r.readCount >= r.maxReads {
return 0, io.EOF
}
r.readCount++
n := copy(p, r.data)
return n, nil
}
func testWithData(data []byte, reads int) {
reader := newRepeatedReader(reads, data)
bufReader := NewBufReader(reader)
io.Copy(ioutil.Discard, bufReader)
}
func Benchmark1M10BytesReads(b *testing.B) {
reads := 1000000
readSize := int64(10)
data := make([]byte, readSize)
b.SetBytes(readSize * int64(reads))
b.ResetTimer()
for i := 0; i < b.N; i++ {
testWithData(data, reads)
}
}
func Benchmark1M1024BytesReads(b *testing.B) {
reads := 1000000
readSize := int64(1024)
data := make([]byte, readSize)
b.SetBytes(readSize * int64(reads))
b.ResetTimer()
for i := 0; i < b.N; i++ {
testWithData(data, reads)
}
}
func Benchmark10k32KBytesReads(b *testing.B) {
reads := 10000
readSize := int64(32 * 1024)
data := make([]byte, readSize)
b.SetBytes(readSize * int64(reads))
b.ResetTimer()
for i := 0; i < b.N; i++ {
testWithData(data, reads)
}
}