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stream_reader_test.go
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stream_reader_test.go
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package smpp
import (
"io"
"net"
"testing"
"time"
)
type fakeNetConn struct {
nextReadValue []byte
nextReadError error
bindTrasceiver01Msg []byte
enquireLink01Msg []byte
}
func newFakeNetConn() *fakeNetConn {
conn := &fakeNetConn{
bindTrasceiver01Msg: []byte{
0, 0, 0, 0x20, // len = 32
0, 0, 0, 0x02, // command = bind_trasceiver
0, 0, 0, 0x00, // status code = 0
0, 0, 0, 0x01, // seq number = 1
0x66, 0x6f, 0x6f, 0, // systemID = 'foo'
0x62, 0x61, 0x72, 0, // passwd = 'bar'
0x62, 0x61, 0x7a, 0, // systemType = 'baz'
0x34, // version
0, // addr_ton
0, // addr_npi
0, // address_range
},
enquireLink01Msg: []byte{
0, 0, 0, 0x10, // len = 16
0, 0, 0, 0x15, // command = eqnuire_link
0, 0, 0, 0x00, // status code = 0
0, 0, 0, 0x02, // seq number = 2
},
}
return conn
}
func (conn *fakeNetConn) Read(b []byte) (int, error) {
if conn.nextReadError != nil {
return 0, conn.nextReadError
}
copy(b, conn.nextReadValue)
return len(conn.nextReadValue), nil
}
func (conn *fakeNetConn) Write(b []byte) (n int, err error) {
return 0, nil
}
func (conn *fakeNetConn) Close() error {
return nil
}
func (conn *fakeNetConn) LocalAddr() net.Addr {
return nil
}
func (conn *fakeNetConn) RemoteAddr() net.Addr {
return nil
}
func (conn *fakeNetConn) SetDeadline(t time.Time) error {
return nil
}
func (conn *fakeNetConn) SetReadDeadline(t time.Time) error {
return nil
}
func (conn *fakeNetConn) SetWriteDeadline(t time.Time) error {
return nil
}
func TestOneMessageOneRead(t *testing.T) {
conn := newFakeNetConn()
conn.nextReadError = nil
conn.nextReadValue = conn.bindTrasceiver01Msg
reader := NewNetworkStreamReader(conn)
pdus, err := reader.Read()
if err != nil {
t.Fatalf("Expected no error on Read(), but got error = (%s)", err)
}
if len(pdus) != 1 {
t.Fatalf("Expected one PDU from Read(), but got (%d)", len(pdus))
}
}
func TestOneMessageTwoReads(t *testing.T) {
conn := newFakeNetConn()
conn.nextReadError = nil
conn.nextReadValue = conn.bindTrasceiver01Msg[:20]
reader := NewNetworkStreamReader(conn)
pdus, err := reader.Read()
if err != nil {
t.Fatalf("Expected no error on first Read(), but got error = (%s)", err)
}
if len(pdus) != 0 {
t.Fatalf("Expected no PDU from first Read(), but got (%d)", len(pdus))
}
conn.nextReadValue = conn.bindTrasceiver01Msg[20:]
pdus, err = reader.Read()
if err != nil {
t.Fatalf("Expected no error on second Read(), but got error = (%s)", err)
}
if len(pdus) != 1 {
t.Fatalf("Expected one PDU from second Read(), but got (%d)", len(pdus))
}
}
func TestTwoMessagesOneRead(t *testing.T) {
conn := newFakeNetConn()
conn.nextReadError = nil
conn.nextReadValue = append(conn.bindTrasceiver01Msg, conn.enquireLink01Msg...)
reader := NewNetworkStreamReader(conn)
pdus, err := reader.Read()
if err != nil {
t.Fatalf("Expected no error on Read(), but got error = (%s)", err)
}
if len(pdus) != 2 {
t.Fatalf("Expected two PDUs from Read(), but got (%d)", len(pdus))
}
}
func TestTwoMessagesTwoReads(t *testing.T) {
conn := newFakeNetConn()
conn.nextReadError = nil
msgSet := append(conn.bindTrasceiver01Msg, conn.enquireLink01Msg...)
reader := NewNetworkStreamReader(conn)
conn.nextReadValue = msgSet[:12]
pdus, err := reader.Read()
if err != nil {
t.Fatalf("Expected no error on first Read(), but got error = (%s)", err)
}
if len(pdus) != 0 {
t.Fatalf("Expected zero PDUs from first Read(), but got (%d)", len(pdus))
}
conn.nextReadValue = msgSet[12:31]
pdus, err = reader.Read()
if err != nil {
t.Fatalf("Expected no error on second Read(), but got error = (%s)", err)
}
if len(pdus) != 0 {
t.Fatalf("Expected zero PDUs from second Read(), but got (%d)", len(pdus))
}
conn.nextReadValue = msgSet[31:40]
pdus, err = reader.Read()
if err != nil {
t.Fatalf("Expected no error on third Read(), but got error = (%s)", err)
}
if len(pdus) != 1 {
t.Fatalf("Expected zero PDUs from third Read(), but got (%d)", len(pdus))
}
conn.nextReadValue = msgSet[40:]
pdus, err = reader.Read()
if err != nil {
t.Fatalf("Expected no error on fourth Read(), but got error = (%s)", err)
}
if len(pdus) != 1 {
t.Fatalf("Expected zero PDUs from fourth Read(), but got (%d)", len(pdus))
}
}
func TestRemoteConnectionClose(t *testing.T) {
conn := newFakeNetConn()
conn.nextReadError = io.EOF
reader := NewNetworkStreamReader(conn)
if reader.AttachedConnectionIsClosed() {
t.Errorf("Initial AttachedConnectionIsClosed() state should be false, but is true")
}
_, err := reader.Read()
if err == nil {
t.Errorf("Expected error on Read() after setting nextReadError but did not get one")
}
if reader.AttachedConnectionIsClosed() == false {
t.Errorf("Expected AttachedConnectionIsClosed() to be true after io.EOF error, but is false")
}
}