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package rpcplugin
import (
"io"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestMuxer(t *testing.T) {
r1, w1 := io.Pipe()
r2, w2 := io.Pipe()
alice := NewMuxer(NewReadWriteCloser(r1, w2), false)
defer func() { assert.NoError(t, alice.Close()) }()
bob := NewMuxer(NewReadWriteCloser(r2, w1), true)
defer func() { assert.NoError(t, bob.Close()) }()
id1, alice1 := alice.Serve()
defer func() { assert.NoError(t, alice1.Close()) }()
id2, bob2 := bob.Serve()
defer func() { assert.NoError(t, bob2.Close()) }()
done1 := make(chan bool)
done2 := make(chan bool)
go func() {
bob1 := bob.Connect(id1)
defer func() { assert.NoError(t, bob1.Close()) }()
n, err := bob1.Write([]byte("ping1.0"))
require.NoError(t, err)
assert.Equal(t, n, 7)
n, err = bob1.Write([]byte("ping1.1"))
require.NoError(t, err)
assert.Equal(t, n, 7)
}()
go func() {
alice2 := alice.Connect(id2)
defer func() { assert.NoError(t, alice2.Close()) }()
n, err := alice2.Write([]byte("ping2.0"))
require.NoError(t, err)
assert.Equal(t, n, 7)
buf := make([]byte, 20)
n, err = alice2.Read(buf)
require.NoError(t, err)
assert.Equal(t, n, 7)
assert.Equal(t, []byte("pong2.0"), buf[:n])
done2 <- true
}()
go func() {
buf := make([]byte, 7)
n, err := io.ReadFull(alice1, buf)
require.NoError(t, err)
assert.Equal(t, n, 7)
assert.Equal(t, []byte("ping1.0"), buf[:n])
n, err = alice1.Read(buf)
require.NoError(t, err)
assert.Equal(t, n, 7)
assert.Equal(t, []byte("ping1.1"), buf[:n])
done1 <- true
}()
go func() {
buf := make([]byte, 20)
n, err := bob2.Read(buf)
require.NoError(t, err)
assert.Equal(t, n, 7)
assert.Equal(t, []byte("ping2.0"), buf[:n])
n, err = bob2.Write([]byte("pong2.0"))
require.NoError(t, err)
assert.Equal(t, n, 7)
}()
<-done1
<-done2
}
// Closing a muxer during a read should unblock, but return an error.
func TestMuxer_CloseDuringRead(t *testing.T) {
r1, w1 := io.Pipe()
r2, w2 := io.Pipe()
alice := NewMuxer(NewReadWriteCloser(r1, w2), false)
bob := NewMuxer(NewReadWriteCloser(r2, w1), true)
defer func() { assert.NoError(t, bob.Close()) }()
_, s := alice.Serve()
go alice.Close()
buf := make([]byte, 20)
n, err := s.Read(buf)
assert.Equal(t, 0, n)
assert.NotNil(t, err)
assert.NotEqual(t, io.EOF, err)
}
// Closing a stream during a read should unblock and return io.EOF since this is the way to
// gracefully close a connection.
func TestMuxer_StreamCloseDuringRead(t *testing.T) {
r1, w1 := io.Pipe()
r2, w2 := io.Pipe()
alice := NewMuxer(NewReadWriteCloser(r1, w2), false)
defer func() { assert.NoError(t, alice.Close()) }()
bob := NewMuxer(NewReadWriteCloser(r2, w1), true)
defer func() { assert.NoError(t, bob.Close()) }()
_, s := alice.Serve()
go s.Close()
buf := make([]byte, 20)
n, err := s.Read(buf)
assert.Equal(t, 0, n)
assert.Equal(t, io.EOF, err)
}
// Closing a stream during a read should unblock and return io.EOF since this is the way for the
// remote to gracefully close a connection.
func TestMuxer_RemoteStreamCloseDuringRead(t *testing.T) {
r1, w1 := io.Pipe()
r2, w2 := io.Pipe()
alice := NewMuxer(NewReadWriteCloser(r1, w2), false)
defer func() { assert.NoError(t, alice.Close()) }()
bob := NewMuxer(NewReadWriteCloser(r2, w1), true)
defer func() { assert.NoError(t, bob.Close()) }()
id, as := alice.Serve()
bs := bob.Connect(id)
go func() {
as.Write([]byte("foo"))
as.Close()
}()
buf := make([]byte, 20)
n, err := bs.Read(buf)
assert.Equal(t, 3, n)
assert.Equal(t, "foo", string(buf[:n]))
n, err = bs.Read(buf)
assert.Equal(t, 0, n)
assert.Equal(t, io.EOF, err)
}
// Closing a muxer during a write should unblock, but return an error.
func TestMuxer_CloseDuringWrite(t *testing.T) {
r1, w1 := io.Pipe()
r2, w2 := io.Pipe()
alice := NewMuxer(NewReadWriteCloser(r1, w2), false)
// Don't connect bob to let writes will block forever.
defer r2.Close()
defer w1.Close()
_, s := alice.Serve()
go alice.Close()
buf := make([]byte, 20)
n, err := s.Write(buf)
assert.Equal(t, 0, n)
assert.NotNil(t, err)
assert.NotEqual(t, io.EOF, err)
}
func TestMuxer_ReadWrite(t *testing.T) {
r1, w1 := io.Pipe()
r2, w2 := io.Pipe()
alice := NewMuxer(NewReadWriteCloser(r1, w2), false)
defer func() { assert.NoError(t, alice.Close()) }()
bob := NewMuxer(NewReadWriteCloser(r2, w1), true)
defer func() { assert.NoError(t, bob.Close()) }()
go alice.Write([]byte("hello"))
buf := make([]byte, 20)
n, err := bob.Read(buf)
assert.Equal(t, 5, n)
assert.Nil(t, err)
assert.Equal(t, []byte("hello"), buf[:n])
}
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