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[CNM-5087] Fix flaking TestDNSOverUDPSnooping #49438

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[CNM-5087] Fix flaking TestDNSOverUDPSnooping #49438

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23 changes: 12 additions & 11 deletions pkg/network/dns/snooper_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -32,25 +32,26 @@ func checkSnooping(t *testing.T, destIP string, destName string, reverseDNS *dns
srcIP := "127.0.0.1"
srcAddr := util.AddressFromString(srcIP)

require.Eventually(t, func() bool {
return reverseDNS.cache.Len() >= 1
}, 1*time.Second, 10*time.Millisecond)

// Verify that the IP from the connections above maps to the right name
payload := map[util.Address]struct{}{srcAddr: {}, destAddr: {}}
names := reverseDNS.Resolve(payload)
require.Len(t, names, 1)
assert.Contains(t, names[destAddr], ToHostname(destName))
require.Eventually(t, func() bool {
names := reverseDNS.Resolve(payload)
for _, h := range names[destAddr] {
if h == ToHostname(destName) {
return true
}
}
return false
}, 5*time.Second, 10*time.Millisecond, "expected Resolve to return %s for %s", destName, destIP)

// Verify telemetry
assert.True(t, cacheTelemetry.length.Load() >= 1)
lookups := cacheTelemetry.lookups.Load()
if srcIP != destIP {
assert.Equal(t, int64(2), lookups)
assert.GreaterOrEqual(t, lookups, int64(2))
} else {
assert.Equal(t, int64(1), lookups)
assert.GreaterOrEqual(t, lookups, int64(1))
}
assert.Equal(t, int64(1), cacheTelemetry.resolved.Load())
assert.GreaterOrEqual(t, cacheTelemetry.resolved.Load(), int64(1))
}

func TestDNSOverUDPSnooping(t *testing.T) {
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