code review 6482044: go.net/ipv4: new package

ipv4/unicastsockopt_test.go

 // Copyright 2012 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.
 
-// +build darwin freebsd linux openbsd
+// +build darwin freebsd linux netbsd openbsd windows
 
 package ipv4_test
 
 import (
         "code.google.com/p/go.net/ipv4"
         "errors"
         "net"
         "os"
+        "runtime"
         "testing"
 )
 
 type testUnicastConn interface {
         TOS() (int, error)
         SetTOS(int) error
         TTL() (int, error)
         SetTTL(int) error
 }
 
@@ skipping 80 matching lines @@
                         t.Errorf("ipv4.NewRawConn failed: %v", err)
                         return
                 }
                 if err := testUnicastSockopt(t, tt, r); err != nil {
                         break
                 }
         }
 }
 
 func testUnicastSockopt(t *testing.T, tt unicastSockoptTest, c testUnicastConn) error {
-        if err := c.SetTOS(tt.tos); err != nil {
-                t.Errorf("ipv4.Conn.SetTOS failed: %v", err)
-                return err
+        switch runtime.GOOS {
+        case "windows":
+                // IP_TOS option is supported on Windows 8 and beyond.
+                t.Logf("skipping IP_TOS test on %q", runtime.GOOS)
+        default:
+                if err := c.SetTOS(tt.tos); err != nil {
+                        t.Errorf("ipv4.Conn.SetTOS failed: %v", err)
+                        return err
+                }
+                if v, err := c.TOS(); err != nil {
+                        t.Errorf("ipv4.Conn.TOS failed: %v", err)
+                        return err
+                } else if v != tt.tos {
+                        t.Errorf("Got unexpected TOS value %v; expected %v", v, tt.tos)
+                        return errors.New("Got unexpected TOS value")
+                }
         }
+
         if err := c.SetTTL(tt.ttl); err != nil {
                 t.Errorf("ipv4.Conn.SetTTL failed: %v", err)
                 return err
-        }
-        if v, err := c.TOS(); err != nil {
-                t.Errorf("ipv4.Conn.TOS failed: %v", err)
-                return err
-        } else if v != tt.tos {
-                t.Errorf("Got unexpected TOS value %v; expected %v", v, tt.tos)
-                return errors.New("Got unexpected TOS value")
         }
         if v, err := c.TTL(); err != nil {
                 t.Errorf("ipv4.Conn.TTL failed: %v", err)
                 return err
         } else if v != tt.ttl {
                 t.Errorf("Got unexpected TTL value %v; expected %v", v, tt.ttl)
                 return errors.New("Got unexpected TTL value")
         }
+
         return nil
 }