Change algorithm of TCP relaying

mtglib/internal/relay/init_test.go

@@ -1,49 +1,5 @@
 package relay_test
 
-import (
-	"bytes"
-	"io"
-	"sync"
-)
-
 type loggerMock struct{}
 
 func (l loggerMock) Printf(format string, args ...interface{}) {}
-
-type rwcMock struct {
-	bytes.Buffer
-
-	closed bool
-	mutex  sync.Mutex
-}
-
-func (r *rwcMock) Read(p []byte) (int, error) {
-	r.mutex.Lock()
-	defer r.mutex.Unlock()
-
-	if r.closed {
-		return 0, io.EOF
-	}
-
-	return r.Buffer.Read(p) // nolint: wrapcheck
-}
-
-func (r *rwcMock) Write(p []byte) (int, error) {
-	r.mutex.Lock()
-	defer r.mutex.Unlock()
-
-	if r.closed {
-		return 0, io.EOF
-	}
-
-	return r.Buffer.Write(p) // nolint: wrapcheck
-}
-
-func (r *rwcMock) Close() error {
-	r.mutex.Lock()
-	defer r.mutex.Unlock()
-
-	r.closed = true
-
-	return nil
-}