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|
package client
import (
"context"
"io"
"net"
"os"
"strings"
"testing"
"time"
)
type mockNetConn struct {
*testing.T
In, Out chan string
in, out chan []byte
die context.CancelFunc
closed bool
rt, wt time.Time
}
func MockNetConn(t *testing.T) *mockNetConn {
// Our mock connection is a testing object
ctx, cancel := context.WithCancel(context.Background())
m := &mockNetConn{T: t, die: cancel}
// buffer input
m.In = make(chan string, 20)
m.in = make(chan []byte)
go func() {
for {
select {
case <-ctx.Done():
return
case s := <-m.In:
m.in <- []byte(s)
}
}
}()
// buffer output
m.Out = make(chan string)
m.out = make(chan []byte, 20)
go func() {
for {
select {
case <-ctx.Done():
return
case b := <-m.out:
m.Out <- string(b)
}
}
}()
return m
}
// Test helpers
func (m *mockNetConn) Send(s string) {
m.In <- s + "\r\n"
}
func (m *mockNetConn) Expect(e string) {
select {
case <-time.After(time.Millisecond):
m.Errorf("Mock connection did not receive expected output.\n\t"+
"Expected: '%s', got nothing.", e)
case s := <-m.Out:
s = strings.Trim(s, "\r\n")
if e != s {
m.Errorf("Mock connection received unexpected value.\n\t"+
"Expected: '%s'\n\tGot: '%s'", e, s)
}
}
}
func (m *mockNetConn) ExpectNothing() {
select {
case <-time.After(time.Millisecond):
case s := <-m.Out:
s = strings.Trim(s, "\r\n")
m.Errorf("Mock connection received unexpected output.\n\t"+
"Expected nothing, got: '%s'", s)
}
}
// Implement net.Conn interface
func (m *mockNetConn) Read(b []byte) (int, error) {
if m.Closed() {
return 0, os.ErrInvalid
}
s, ok := <-m.in
copy(b, s)
if !ok {
return len(s), io.EOF
}
return len(s), nil
}
func (m *mockNetConn) Write(s []byte) (int, error) {
if m.Closed() {
return 0, os.ErrInvalid
}
b := make([]byte, len(s))
copy(b, s)
m.out <- b
return len(s), nil
}
func (m *mockNetConn) Close() error {
if m.Closed() {
return os.ErrInvalid
}
m.closed = true
// Shut down *ALL* the goroutines!
// This will trigger an EOF event in Read() too
m.die()
close(m.in)
return nil
}
func (m *mockNetConn) Closed() bool {
return m.closed
}
func (m *mockNetConn) LocalAddr() net.Addr {
return &net.IPAddr{IP: net.IPv4(127, 0, 0, 1)}
}
func (m *mockNetConn) RemoteAddr() net.Addr {
return &net.IPAddr{IP: net.IPv4(127, 0, 0, 1)}
}
func (m *mockNetConn) SetDeadline(t time.Time) error {
m.rt = t
m.wt = t
return nil
}
func (m *mockNetConn) SetReadDeadline(t time.Time) error {
m.rt = t
return nil
}
func (m *mockNetConn) SetWriteDeadline(t time.Time) error {
m.wt = t
return nil
}
|
