net: remove arbitrary deadlines in PacketConn tests

When TestPacketConn was added (in CL 6501057) it included arbitrary
100ms deadlines. Those deadlines were arbitrarily increased to 500ms
in CL 4922.

If the test is actually provoking a deadlock, allowing it to deadlock
will give us a more useful goroutine dump. Otherwise, the deadlines
don't seem all that useful — they appear to increase code coverage,
but have no effect on the test in the typical case, and can only
cause flakes on particularly-slow machines.

For #43627

Change-Id: I83de5217c54c743b83adddf51d4f6f2bd5b91732
Reviewed-on: https://go-review.googlesource.com/c/go/+/368215
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

diff --git a/src/net/packetconn_test.go b/src/net/packetconn_test.go
index b3b17156555a8a28e9673096b991a74a99d2653b..487912efab961566079dd0f19e3679dc33f5f2ef 100644 (file)
--- a/src/net/packetconn_test.go
+++ b/src/net/packetconn_test.go
@@ -12,7 +12,6 @@ package net
 import (
        "os"
        "testing"
-       "time"
 )
 
 // The full stack test cases for IPConn have been moved to the
@@ -60,9 +59,6 @@ func TestPacketConn(t *testing.T) {
                }
                defer closer(c1, tt.net, tt.addr1, tt.addr2)
                c1.LocalAddr()
-               c1.SetDeadline(time.Now().Add(500 * time.Millisecond))
-               c1.SetReadDeadline(time.Now().Add(500 * time.Millisecond))
-               c1.SetWriteDeadline(time.Now().Add(500 * time.Millisecond))
 
                c2, err := ListenPacket(tt.net, tt.addr2)
                if err != nil {
@@ -70,9 +66,6 @@ func TestPacketConn(t *testing.T) {
                }
                defer closer(c2, tt.net, tt.addr1, tt.addr2)
                c2.LocalAddr()
-               c2.SetDeadline(time.Now().Add(500 * time.Millisecond))
-               c2.SetReadDeadline(time.Now().Add(500 * time.Millisecond))
-               c2.SetWriteDeadline(time.Now().Add(500 * time.Millisecond))
                rb2 := make([]byte, 128)
 
                if _, err := c1.WriteTo(wb, c2.LocalAddr()); err != nil {
@@ -115,9 +108,6 @@ func TestConnAndPacketConn(t *testing.T) {
                }
                defer closer(c1, tt.net, tt.addr1, tt.addr2)
                c1.LocalAddr()
-               c1.SetDeadline(time.Now().Add(500 * time.Millisecond))
-               c1.SetReadDeadline(time.Now().Add(500 * time.Millisecond))
-               c1.SetWriteDeadline(time.Now().Add(500 * time.Millisecond))
 
                c2, err := Dial(tt.net, c1.LocalAddr().String())
                if err != nil {
@@ -126,9 +116,6 @@ func TestConnAndPacketConn(t *testing.T) {
                defer c2.Close()
                c2.LocalAddr()
                c2.RemoteAddr()
-               c2.SetDeadline(time.Now().Add(500 * time.Millisecond))
-               c2.SetReadDeadline(time.Now().Add(500 * time.Millisecond))
-               c2.SetWriteDeadline(time.Now().Add(500 * time.Millisecond))
 
                if _, err := c2.Write(wb); err != nil {
                        t.Fatal(err)