net: add test for CL 17458

I thought that we avoided creating on-disk Unix sockets,
but I was mistaken. Use one to test CL 17458.

Fixes #11826.

Change-Id: Iaa1fb007b95fa6be48200586522a6d4789ecd346
Reviewed-on: https://go-review.googlesource.com/17725
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

diff --git a/src/net/unix_test.go b/src/net/unix_test.go
index 73f682e6bce9330489760c7d96b559bbb2a73fcc..f0c583068ec08abf6bb93965e37107b3978ae02b 100644 (file)
--- a/src/net/unix_test.go
+++ b/src/net/unix_test.go
@@ -405,6 +405,42 @@ func TestUnixgramConnLocalAndRemoteNames(t *testing.T) {
        }
 }
 
+func TestUnixUnlink(t *testing.T) {
+       if !testableNetwork("unix") {
+               t.Skip("unix test")
+       }
+       name := testUnixAddr()
+       l, err := Listen("unix", name)
+       if err != nil {
+               t.Fatal(err)
+       }
+       if _, err := os.Stat(name); err != nil {
+               t.Fatalf("cannot stat unix socket after ListenUnix: %v", err)
+       }
+       f, _ := l.(*UnixListener).File()
+       l1, err := FileListener(f)
+       if err != nil {
+               t.Fatal(err)
+       }
+       if _, err := os.Stat(name); err != nil {
+               t.Fatalf("cannot stat unix socket after FileListener: %v", err)
+       }
+       if err := l1.Close(); err != nil {
+               t.Fatalf("closing file listener: %v", err)
+       }
+       if _, err := os.Stat(name); err != nil {
+               t.Fatalf("cannot stat unix socket after closing FileListener: %v", err)
+       }
+       f.Close()
+       if _, err := os.Stat(name); err != nil {
+               t.Fatalf("cannot stat unix socket after closing FileListener and fd: %v", err)
+       }
+       l.Close()
+       if _, err := os.Stat(name); err == nil {
+               t.Fatal("closing unix listener did not remove unix socket")
+       }
+}
+
 // forceGoDNS forces the resolver configuration to use the pure Go resolver
 // and returns a fixup function to restore the old settings.
 func forceGoDNS() func() {