test case for interface

transport/pipe/pipe_test.go

@@ -131,6 +131,10 @@ func TestPipeWriteMultiThread(t *testing.T) {
 func TestInterfaces(t *testing.T) {
 	_ = (buf.Reader)(new(Reader))
 	_ = (buf.TimeoutReader)(new(Reader))
+
+	_ = (common.Interruptible)(new(Reader))
+	_ = (common.Interruptible)(new(Writer))
+	_ = (common.Closable)(new(Writer))
 }
 
 func BenchmarkPipeReadWrite(b *testing.B) {