@ -2,15 +2,11 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux ,!redo
// +build linux darwin,!ts_macext
package interfaces
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"testing"
)
@ -23,64 +19,3 @@ func TestDefaultRouteInterface(t *testing.T) {
}
t . Logf ( "got %q" , v )
}
// test the specific /proc/net/route path as found on Google Cloud Run instances
func TestGoogleCloudRunDefaultRouteInterface ( t * testing . T ) {
dir := t . TempDir ( )
savedProcNetRoutePath := procNetRoutePath
defer func ( ) { procNetRoutePath = savedProcNetRoutePath } ( )
procNetRoutePath = filepath . Join ( dir , "CloudRun" )
buf := [ ] byte ( "Iface\tDestination\tGateway\tFlags\tRefCnt\tUse\tMetric\tMask\tMTU\tWindow\tIRTT\n" +
"eth0\t8008FEA9\t00000000\t0001\t0\t0\t0\t01FFFFFF\t0\t0\t0\n" +
"eth1\t00000000\t00000000\t0001\t0\t0\t0\t00000000\t0\t0\t0\n" )
err := ioutil . WriteFile ( procNetRoutePath , buf , 0644 )
if err != nil {
t . Fatal ( err )
}
got , err := DefaultRouteInterface ( )
if err != nil {
t . Fatal ( err )
}
if got != "eth1" {
t . Fatalf ( "got %s, want eth1" , got )
}
}
// we read chunks of /proc/net/route at a time, test that files longer than the chunk
// size can be handled.
func TestExtremelyLongProcNetRoute ( t * testing . T ) {
dir := t . TempDir ( )
savedProcNetRoutePath := procNetRoutePath
defer func ( ) { procNetRoutePath = savedProcNetRoutePath } ( )
procNetRoutePath = filepath . Join ( dir , "VeryLong" )
f , err := os . Create ( procNetRoutePath )
if err != nil {
t . Fatal ( err )
}
_ , err = f . Write ( [ ] byte ( "Iface\tDestination\tGateway\tFlags\tRefCnt\tUse\tMetric\tMask\tMTU\tWindow\tIRTT\n" ) )
if err != nil {
t . Fatal ( err )
}
for n := 0 ; n <= 1000 ; n ++ {
line := fmt . Sprintf ( "eth%d\t8008FEA9\t00000000\t0001\t0\t0\t0\t01FFFFFF\t0\t0\t0\n" , n )
_ , err := f . Write ( [ ] byte ( line ) )
if err != nil {
t . Fatal ( err )
}
}
_ , err = f . Write ( [ ] byte ( "tokenring1\t00000000\t00000000\t0001\t0\t0\t0\t00000000\t0\t0\t0\n" ) )
if err != nil {
t . Fatal ( err )
}
got , err := DefaultRouteInterface ( )
if err != nil {
t . Fatal ( err )
}
if got != "tokenring1" {
t . Fatalf ( "got %q, want tokenring1" , got )
}
}