1 files changed, 66 insertions, 0 deletions
diff --git a/src/os/rawconn_test.go b/src/os/rawconn_test.go
new file mode 100644
index 0000000..62b99f8
--- /dev/null
+++ b/src/os/rawconn_test.go
@@ -0,0 +1,66 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Test use of raw connections.
+//
+//go:build !plan9 && !js
+
+package os_test
+
+import (
+	"os"
+	"syscall"
+	"testing"
+)
+
+func TestRawConnReadWrite(t *testing.T) {
+	t.Parallel()
+
+	r, w, err := os.Pipe()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer r.Close()
+	defer w.Close()
+
+	rconn, err := r.SyscallConn()
+	if err != nil {
+		t.Fatal(err)
+	}
+	wconn, err := w.SyscallConn()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var operr error
+	err = wconn.Write(func(s uintptr) bool {
+		_, operr = syscall.Write(syscallDescriptor(s), []byte{'b'})
+		return operr != syscall.EAGAIN
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if operr != nil {
+		t.Fatal(err)
+	}
+
+	var n int
+	buf := make([]byte, 1)
+	err = rconn.Read(func(s uintptr) bool {
+		n, operr = syscall.Read(syscallDescriptor(s), buf)
+		return operr != syscall.EAGAIN
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if operr != nil {
+		t.Fatal(operr)
+	}
+	if n != 1 {
+		t.Errorf("read %d bytes, expected 1", n)
+	}
+	if buf[0] != 'b' {
+		t.Errorf("read %q, expected %q", buf, "b")
+	}
+}