142 lines
3.1 KiB
Go
142 lines
3.1 KiB
Go
package p2p
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import (
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"bytes"
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"fmt"
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"io"
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"io/ioutil"
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"runtime"
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"testing"
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"time"
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)
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func TestNewMsg(t *testing.T) {
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msg := NewMsg(3, 1, "000")
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if msg.Code != 3 {
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t.Errorf("incorrect code %d, want %d", msg.Code)
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}
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if msg.Size != 5 {
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t.Errorf("incorrect size %d, want %d", msg.Size, 5)
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}
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pl, _ := ioutil.ReadAll(msg.Payload)
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expect := []byte{0x01, 0x83, 0x30, 0x30, 0x30}
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if !bytes.Equal(pl, expect) {
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t.Errorf("incorrect payload content, got %x, want %x", pl, expect)
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}
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}
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func ExampleMsgPipe() {
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rw1, rw2 := MsgPipe()
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go func() {
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EncodeMsg(rw1, 8, []byte{0, 0})
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EncodeMsg(rw1, 5, []byte{1, 1})
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rw1.Close()
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}()
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for {
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msg, err := rw2.ReadMsg()
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if err != nil {
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break
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}
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var data [1][]byte
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msg.Decode(&data)
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fmt.Printf("msg: %d, %x\n", msg.Code, data[0])
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}
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// Output:
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// msg: 8, 0000
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// msg: 5, 0101
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}
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func TestMsgPipeUnblockWrite(t *testing.T) {
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loop:
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for i := 0; i < 100; i++ {
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rw1, rw2 := MsgPipe()
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done := make(chan struct{})
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go func() {
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if err := EncodeMsg(rw1, 1); err == nil {
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t.Error("EncodeMsg returned nil error")
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} else if err != ErrPipeClosed {
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t.Error("EncodeMsg returned wrong error: got %v, want %v", err, ErrPipeClosed)
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}
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close(done)
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}()
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// this call should ensure that EncodeMsg is waiting to
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// deliver sometimes. if this isn't done, Close is likely to
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// be executed before EncodeMsg starts and then we won't test
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// all the cases.
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runtime.Gosched()
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rw2.Close()
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select {
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case <-done:
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case <-time.After(200 * time.Millisecond):
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t.Errorf("write didn't unblock")
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break loop
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}
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}
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}
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// This test should panic if concurrent close isn't implemented correctly.
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func TestMsgPipeConcurrentClose(t *testing.T) {
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rw1, _ := MsgPipe()
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for i := 0; i < 10; i++ {
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go rw1.Close()
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}
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}
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func TestEOFSignal(t *testing.T) {
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rb := make([]byte, 10)
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// empty reader
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eof := make(chan struct{}, 1)
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sig := &eofSignal{new(bytes.Buffer), 0, eof}
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if n, err := sig.Read(rb); n != 0 || err != io.EOF {
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t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
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}
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select {
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case <-eof:
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default:
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t.Error("EOF chan not signaled")
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}
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// count before error
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eof = make(chan struct{}, 1)
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sig = &eofSignal{bytes.NewBufferString("aaaaaaaa"), 4, eof}
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if n, err := sig.Read(rb); n != 4 || err != nil {
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t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
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}
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select {
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case <-eof:
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default:
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t.Error("EOF chan not signaled")
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}
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// error before count
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eof = make(chan struct{}, 1)
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sig = &eofSignal{bytes.NewBufferString("aaaa"), 999, eof}
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if n, err := sig.Read(rb); n != 4 || err != nil {
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t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
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}
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if n, err := sig.Read(rb); n != 0 || err != io.EOF {
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t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
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}
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select {
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case <-eof:
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default:
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t.Error("EOF chan not signaled")
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}
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// no signal if neither occurs
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eof = make(chan struct{}, 1)
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sig = &eofSignal{bytes.NewBufferString("aaaaaaaaaaaaaaaaaaaaa"), 999, eof}
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if n, err := sig.Read(rb); n != 10 || err != nil {
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t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
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}
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select {
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case <-eof:
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t.Error("unexpected EOF signal")
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default:
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}
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}
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