mirror of
https://github.com/tailscale/tailscale.git
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162d593514
I meant to do this in the earlier change and had a git fail. To atone, add a test too while I'm here. Updates #12486 Updates #12507 Change-Id: I4943b454a2530cb5047636f37136aa2898d2ffc7 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
129 lines
2.8 KiB
Go
129 lines
2.8 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package flowtrack
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import (
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"encoding/json"
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"net/netip"
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"testing"
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"tailscale.com/tstest"
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"tailscale.com/types/ipproto"
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)
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func TestCache(t *testing.T) {
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c := &Cache[int]{MaxEntries: 2}
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k1 := MakeTuple(0, netip.MustParseAddrPort("1.1.1.1:1"), netip.MustParseAddrPort("1.1.1.1:1"))
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k2 := MakeTuple(0, netip.MustParseAddrPort("1.1.1.1:1"), netip.MustParseAddrPort("2.2.2.2:2"))
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k3 := MakeTuple(0, netip.MustParseAddrPort("1.1.1.1:1"), netip.MustParseAddrPort("3.3.3.3:3"))
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k4 := MakeTuple(0, netip.MustParseAddrPort("1.1.1.1:1"), netip.MustParseAddrPort("4.4.4.4:4"))
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wantLen := func(want int) {
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t.Helper()
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if got := c.Len(); got != want {
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t.Fatalf("Len = %d; want %d", got, want)
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}
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}
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wantVal := func(key Tuple, want int) {
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t.Helper()
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got, ok := c.Get(key)
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if !ok {
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t.Fatalf("Get(%q) failed; want value %v", key, want)
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}
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if *got != want {
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t.Fatalf("Get(%q) = %v; want %v", key, got, want)
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}
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}
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wantMissing := func(key Tuple) {
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t.Helper()
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if got, ok := c.Get(key); ok {
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t.Fatalf("Get(%q) = %v; want absent from cache", key, got)
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}
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}
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wantLen(0)
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c.RemoveOldest() // shouldn't panic
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c.Remove(k4) // shouldn't panic
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c.Add(k1, 1)
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wantLen(1)
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c.Add(k2, 2)
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wantLen(2)
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c.Add(k3, 3)
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wantLen(2) // hit the max
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wantMissing(k1)
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c.Remove(k1)
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wantLen(2) // no change; k1 should've been the deleted one per LRU
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wantVal(k3, 3)
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wantVal(k2, 2)
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c.Remove(k2)
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wantLen(1)
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wantMissing(k2)
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c.Add(k3, 30)
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wantVal(k3, 30)
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wantLen(1)
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err := tstest.MinAllocsPerRun(t, 0, func() {
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got, ok := c.Get(k3)
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if !ok {
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t.Fatal("missing k3")
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}
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if *got != 30 {
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t.Fatalf("got = %d; want 30", got)
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}
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})
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if err != nil {
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t.Error(err)
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}
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}
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func BenchmarkMapKeys(b *testing.B) {
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b.Run("typed", func(b *testing.B) {
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c := &Cache[struct{}]{MaxEntries: 1000}
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var t Tuple
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for proto := range 20 {
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t = Tuple{proto: ipproto.Proto(proto), src: netip.MustParseAddr("1.1.1.1").As16(), srcPort: 1, dst: netip.MustParseAddr("1.1.1.1").As16(), dstPort: 1}
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c.Add(t, struct{}{})
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}
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for i := 0; i < b.N; i++ {
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_, ok := c.Get(t)
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if !ok {
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b.Fatal("missing key")
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}
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}
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})
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}
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func TestStringJSON(t *testing.T) {
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v := MakeTuple(123,
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netip.MustParseAddrPort("1.2.3.4:5"),
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netip.MustParseAddrPort("6.7.8.9:10"))
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if got, want := v.String(), "(IPProto-123 1.2.3.4:5 => 6.7.8.9:10)"; got != want {
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t.Errorf("String = %q; want %q", got, want)
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}
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got, err := json.Marshal(v)
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if err != nil {
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t.Fatal(err)
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}
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const want = `{"proto":123,"src":"1.2.3.4:5","dst":"6.7.8.9:10"}`
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if string(got) != want {
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t.Errorf("Marshal = %q; want %q", got, want)
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}
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var back Tuple
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if err := json.Unmarshal(got, &back); err != nil {
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t.Fatal(err)
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}
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if back != v {
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t.Errorf("back = %v; want %v", back, v)
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}
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}
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