git.giacomolli.uk - onechat/blob - replay_test.go

   1 package main
   2
   3 import (
   4         "fmt"
   5         "math/rand/v2"
   6         "os"
   7         "path/filepath"
   8         "runtime"
   9         "strings"
  10         "testing"
  11         "time"
  12
  13         "github.com/stretchr/testify/require"
  14 )
  15
  16 // replayMessages is the length of the synthetic log.
  17 const replayMessages = 100000
  18
  19 // TestReplaySyntheticLog runs a synthetic log through the memory core with the
  20 // fake summarizer. After each message it waits for the builds, as a turn does.
  21 // It checks that each view stays within its sawtooth, that no view line holds a
  22 // whole long message or a part of an unbuilt one, and that a restart in the
  23 // middle and at the end loads the same views byte for byte.
  24 func TestReplaySyntheticLog(t *testing.T) {
  25         start := time.Now()
  26         root := t.TempDir()
  27         clock := newTestClock()
  28         random := rand.New(rand.NewPCG(1, 2))
  29         memory, err := openMemory(t.Context(), root, clock.Now, newFakeSummarizer())
  30         require.NoError(t, err)
  31
  32         defer func() {
  33                 require.NoError(t, memory.Close())
  34         }()
  35
  36         batches := 0
  37         low := viewChatHigh
  38         long := make([]bool, replayMessages)
  39         for id := range replayMessages {
  40                 if id == replayMessages/2 {
  41                         memory = replayRequireRestart(t, memory, root, clock)
  42                 }
  43
  44                 clock.now = clock.now.Add(time.Minute)
  45                 kind, text := replayMessage(random, id)
  46                 long[id] = len(kind)+len(": ")+len(text) > nodeBytes
  47                 lines := replayViewLines(memory)
  48                 _, err = memory.Append(kind, text)
  49                 require.NoError(t, err)
  50
  51                 size, merged := replayRequireViews(t, memory, lines, long, id%1000 == 0)
  52                 if merged {
  53                         batches++
  54                         low = min(low, size)
  55                 }
  56
  57                 require.NoError(t, memory.Wait(t.Context()))
  58         }
  59
  60         memory = replayRequireRestart(t, memory, root, clock)
  61         require.Equal(t, replayMessages, memory.log.Len())
  62         require.Greater(t, batches, 0)
  63
  64         require.NoError(t, memory.Wait(t.Context()))
  65         t.Logf("%d messages, %d nodes, %d batches in %s", replayMessages, memory.tree.Count(), batches, time.Since(start).Round(time.Second))
  66         t.Logf("chat view: %d lines, %d bytes, lowest after a batch %d bytes", len(memory.chat.lines), memory.chat.Size(), low)
  67         t.Logf("compaction view: %d lines, %d bytes", len(memory.cview.lines), memory.cview.Size())
  68
  69         runtime.GC()
  70
  71         var stats runtime.MemStats
  72         runtime.ReadMemStats(&stats)
  73         t.Logf("heap in use: %d KB", stats.HeapInuse/1024)
  74 }
  75
  76 // replayRequireRestart closes memory, opens it again, and checks that the views
  77 // and view.json stay the same byte for byte.
  78 func replayRequireRestart(t *testing.T, memory *Memory, root string, clock *TestClock) *Memory {
  79         t.Helper()
  80
  81         require.NoError(t, memory.Wait(t.Context()))
  82
  83         view := memory.View()
  84         context := memory.Context(0, memory.log.Len())
  85         saved, err := os.ReadFile(filepath.Join(root, "view.json"))
  86         require.NoError(t, err)
  87         require.NoError(t, memory.Close())
  88
  89         memory, err = openMemory(t.Context(), root, clock.Now, newFakeSummarizer())
  90         require.NoError(t, err)
  91         require.NoError(t, memory.Wait(t.Context()))
  92         require.Equal(t, view, memory.View())
  93         require.Equal(t, context, memory.Context(0, memory.log.Len()))
  94
  95         loaded, err := os.ReadFile(filepath.Join(root, "view.json"))
  96         require.NoError(t, err)
  97         require.Equal(t, saved, loaded)
  98
  99         return memory
 100 }
 101
 102 // replayMessage returns the kind and the text of message id. Most messages are
 103 // tool calls and their output. Users write short lines. One output in a hundred
 104 // is over 30 KB.
 105 func replayMessage(random *rand.Rand, id int) (string, string) {
 106         roll := random.IntN(100)
 107         switch {
 108         case roll < 5:
 109                 return "user", replayText(id, 10+random.IntN(200))
 110         case roll < 10:
 111                 return "reply", replayText(id, 100+random.IntN(1500))
 112         case roll < 12:
 113                 return "note", replayText(id, 50+random.IntN(600))
 114         case roll < 13:
 115                 return "work", replayText(id, 300+random.IntN(3000))
 116         case roll < 56:
 117                 return "tool", replayText(id, 60+random.IntN(400))
 118         case roll < 57:
 119                 return "echo", replayText(id, 30000+random.IntN(30000))
 120         default:
 121                 return "echo", replayText(id, 20+random.IntN(4000))
 122         }
 123 }
 124
 125 // replayViewLines returns the number of lines in the chat view of memory.
 126 func replayViewLines(memory *Memory) int {
 127         memory.mutex.Lock()
 128         defer memory.mutex.Unlock()
 129
 130         return len(memory.chat.lines)
 131 }
 132
 133 // replayRequireViews checks the views after a new message, and with full
 134 // compares them with the tree. Each view is at most its high limit, and a batch
 135 // merges the chat view to its low limit. The leaf of the new message can be
 136 // built after the append, so the sizes count it as the pending mark, as the
 137 // append did. It returns the size of the chat view and if a batch merged it,
 138 // from the number of lines before the message.
 139 func replayRequireViews(t *testing.T, memory *Memory, lines int, long []bool, full bool) (int, bool) {
 140         t.Helper()
 141
 142         memory.mutex.Lock()
 143         defer memory.mutex.Unlock()
 144
 145         size := replayAppendSize(memory.chat)
 146         require.LessOrEqual(t, size, viewChatHigh)
 147         require.LessOrEqual(t, replayAppendSize(memory.cview), viewCompactionHigh)
 148
 149         merged := len(memory.chat.lines) < lines
 150         if merged {
 151                 require.LessOrEqual(t, size, viewChatLow)
 152         }
 153
 154         replayRequireOnlySummaries(t, memory, long, full)
 155
 156         return size, merged
 157 }
 158
 159 // replayText returns a text of about size bytes that starts with its message ID
 160 // and holds some non-ASCII characters.
 161 func replayText(id, size int) string {
 162         head := fmt.Sprintf("m%d ", id)
 163         words := "ação data line café "
 164
 165         return head + strings.Repeat(words, max(1, (size-len(head))/len(words)))
 166 }
 167
 168 // replayAppendSize returns the size of view with its last line as the pending
 169 // mark.
 170 func replayAppendSize(view *View) int {
 171         last := view.lines[len(view.lines)-1]
 172         return view.Size() - view.lineSize(last) + len(viewPending)
 173 }
 174
 175 // replayRequireOnlySummaries checks each line of the chat view as the model
 176 // reads it. A built line holds its node, a long message has a summary of the
 177 // fake summarizer and not its text, and an unbuilt line holds only the pending
 178 // mark. With full, it also checks that the view keeps the node of each built
 179 // line. The caller holds the lock of memory.
 180 func replayRequireOnlySummaries(t *testing.T, memory *Memory, long []bool, full bool) {
 181         t.Helper()
 182
 183         rendered := strings.Split(memory.chat.Render(), "\n")
 184         require.Len(t, rendered, len(memory.chat.lines)+2)
 185
 186         for n, line := range memory.chat.lines {
 187                 head := fmt.Sprintf("%d+%d|", line.index<<line.level, 1<<line.level)
 188                 node, built := memory.chat.nodes[line]
 189                 if full {
 190                         require.Equal(t, treeIsBuilt(t, memory.tree, line.level, line.index), built)
 191                 }
 192
 193                 if !built {
 194                         require.Equal(t, 0, line.level)
 195                         require.Equal(t, head+viewPending, rendered[n+1])
 196
 197                         continue
 198                 }
 199
 200                 require.Equal(t, head+strings.ReplaceAll(node.Text, "\n", " "), rendered[n+1])
 201                 if line.level == 0 && long[line.index] {
 202                         require.True(t, strings.HasPrefix(node.Text, "summary "), "message %d", line.index)
 203                 }
 204         }
 205 }