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|
package sidechannel
import (
"fmt"
"io"
"net"
"strings"
"testing"
"github.com/stretchr/testify/require"
)
func TestClientWrite(t *testing.T) {
largeString := strings.Repeat("a", maxChunkSize)
testCases := []struct {
desc string
in string
out string
err error
}{
{desc: "empty", out: ""},
{desc: "1-byte string", in: "h", out: "0005h"},
{desc: "short string", in: "hello", out: "0009hello"},
{desc: "short string 2", in: "hello this world", out: "0014hello this world"},
{
desc: "large string",
in: largeString,
out: "fff0" + largeString,
},
{
desc: "very large string",
in: largeString + "b",
out: "fff0" + largeString + "0005b",
},
}
type result struct {
data string
err error
}
for _, tc := range testCases {
t.Run(tc.desc, func(t *testing.T) {
client, server := net.Pipe()
ch := make(chan result, 1)
go func() {
out, err := io.ReadAll(server)
ch <- result{data: string(out), err: err}
}()
cc := newClientConn(client)
written, err := cc.Write([]byte(tc.in))
if tc.err != nil {
require.Equal(t, tc.err, err)
return
}
require.NoError(t, err)
require.NoError(t, cc.close())
require.Equal(t, written, len(tc.in))
res := <-ch
require.NoError(t, res.err)
require.Equal(t, tc.out, res.data)
})
}
}
func TestServerRead(t *testing.T) {
largeString := strings.Repeat("a", maxChunkSize)
testCases := []struct {
desc string
in string
out string
err error
}{
{desc: "empty", in: "0000", out: ""},
{desc: "empty 2", in: "00040000", out: ""},
{desc: "1-byte string", in: "0005h0000", out: "h"},
{desc: "short string", in: "0009hello0000", out: "hello"},
{desc: "short string 2", in: "0014hello this world0000", out: "hello this world"},
{desc: "invalid header 1", in: "0001", err: fmt.Errorf("sidechannel: invalid header 1")},
{desc: "invalid header 2", in: "0002", err: fmt.Errorf("sidechannel: invalid header 2")},
{desc: "invalid header 3", in: "0003", err: fmt.Errorf("sidechannel: invalid header 3")},
{desc: "multiple short strings", in: "0009hello0008this0009world0000", out: "hellothisworld"},
{
desc: "large string",
in: "fff0" + largeString + "0000",
out: largeString,
},
{
desc: "very large string",
in: "fff0" + largeString + "0005b0000",
out: largeString + "b",
},
{desc: "flush packet", in: "0009hello0000trashtrash", out: "hello"},
{desc: "unexpected closed without trailing 0000", in: "0009hello", err: io.ErrUnexpectedEOF},
}
type result struct {
data string
err error
}
for _, tc := range testCases {
t.Run(tc.desc, func(t *testing.T) {
client, server := net.Pipe()
ch := make(chan result, 1)
go func() {
cc := newServerConn(server)
out, err := io.ReadAll(cc)
ch <- result{data: string(out), err: err}
}()
written, err := client.Write([]byte(tc.in))
require.Equal(t, written, len(tc.in))
require.NoError(t, err)
client.Close()
res := <-ch
if tc.err != nil {
require.Equal(t, tc.err, res.err)
return
}
require.NoError(t, res.err)
require.Equal(t, tc.out, res.data)
})
}
}
func TestHalfClose(t *testing.T) {
type result struct {
data string
err error
}
client, server := net.Pipe()
clientCc := newClientConn(client)
serverCc := newServerConn(server)
ch := make(chan result, 1)
go func() {
out, err := io.ReadAll(serverCc)
ch <- result{data: string(out), err: err}
}()
written, err := clientCc.Write([]byte("Ping"))
require.Equal(t, written, 4)
require.NoError(t, err)
require.NoError(t, clientCc.CloseWrite())
res := <-ch
require.NoError(t, res.err)
require.Equal(t, "Ping", res.data)
_, err = clientCc.Write([]byte("Should not be sent"))
require.EqualError(t, err, "sidechannel: write into a half-closed connection")
go func() {
out, err := io.ReadAll(clientCc)
ch <- result{data: string(out), err: err}
}()
_, err = serverCc.Write([]byte("Pong"))
require.NoError(t, err)
serverCc.Close()
res = <-ch
require.NoError(t, res.err)
require.Equal(t, "Pong", res.data)
}
|
