tailscale/net
Avery Pennarun 97e021d8ed fix flaky tests: improve test isolation and reliability
Test fixes for consistent pass rates under repeated runs (-count=N):

Global state isolation:
- appc: check metric deltas instead of absolute values
- cmd/derper: initialize DNS caches before test
- tsweb/varz: use unpublished expvar to avoid global registration
- wgengine/netstack: check metric deltas instead of absolute values
- net/dns: use SetForTest() with deferred restore for hooks

Timeout and concurrency:
- cmd/containerboot: increase wait loop timeouts for parallel load
- tsconsensus: add deadline to waitFor(), use sync.Once for netns
- tstest/integration: add tstest.Shard/Parallel, fix IPN bus watchers
- net/netcheck: set testCaptivePortalDelay to prevent hangs
- wgengine/magicsock: use Port:0, add timeout to callback wait
- drive/driveimpl: use http.Server for proper shutdown

Race conditions:
- tstest/archtest: remove !race from build constraint
- util/deephash: use local sink variable instead of package-level
- net/art: switch to math/rand/v2 for thread-safe globals
- tstest/integration: use Status() instead of MustStatus() from goroutines

Test optimization:
- net/udprelay: rewrite VNI test to avoid iterating all 16M values
- ipn/ipnlocal: reset env vars between subtests
- cmd/containerboot/serve: use SetWaitDurationForTest
- tsnet: wait for service VIP in AllowedIPs before dialing

Change-Id: Id6186fb8a45031920550a208ded77382e57cc016
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
2026-04-13 17:28:18 +02:00
..
ace all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
art fix flaky tests: improve test isolation and reliability 2026-04-13 17:28:18 +02:00
bakedroots all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
batching cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
captivedetection fix flaky tests: make code more testable and fix race conditions 2026-04-13 17:28:15 +02:00
connectproxy all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
dns fix flaky tests: improve test isolation and reliability 2026-04-13 17:28:18 +02:00
dnscache all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
dnsfallback all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
flowtrack all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
ipset all: use bart.Lite instead of bart.Table where appropriate 2026-03-24 14:45:23 +00:00
ktimeout all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
memnet all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
netaddr all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
netcheck fix flaky tests: improve test isolation and reliability 2026-04-13 17:28:18 +02:00
neterror all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
netkernelconf all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
netknob all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
netmon ipn/ipnlocal,net/netmon: make frequent darkwake more efficient 2026-04-06 15:46:51 -07:00
netns netns: add Android callback to bind socket to network (#18915) 2026-03-11 12:28:28 -07:00
netstat all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
netutil all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
netx all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
packet net,tsnet: fix the capitalisation of "Wireshark" 2026-03-26 19:39:29 +00:00
ping all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
portmapper all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
porttrack net/porttrack: change magic listen address format for Go 1.26 2026-03-04 21:57:05 -08:00
proxymux all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
routetable netns,wgengine: add OpenBSD support to netns via an rtable 2026-02-25 12:44:32 -08:00
sockopts all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
socks5 all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
sockstats all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
speedtest cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
stun cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
stunserver all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
tcpinfo all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
tlsdial tsd, all: add Sys.ExtraRootCAs, plumb through TLS dial paths 2026-04-07 18:10:54 -07:00
tsaddr all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
tsdial all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
tshttpproxy cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
tstun tailcfg,ipn/ipnlocal: regulate netmap caching via a node attribute (#19117) 2026-04-01 15:02:53 -07:00
udprelay fix flaky tests: improve test isolation and reliability 2026-04-13 17:28:18 +02:00
wsconn all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00