X-Git-Url: https://git.giacomolli.uk/onechat/blobdiff_plain/e5343bd4c3ec69192e92f4be339b855eef36b6ec..de170709599e849c6b409d247b800dc68b0c7ab7:/memory_test.go?ds=inline

diff --git a/memory_test.go b/memory_test.go
index 426654a..001f852 100644
--- a/memory_test.go
+++ b/memory_test.go
@@ -2,9 +2,13 @@ package main
 
 import (
 	"fmt"
+	"maps"
 	"os"
 	"path/filepath"
+	"slices"
+	"strings"
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/require"
 )
@@ -12,7 +16,7 @@ import (
 func TestMemoryRestartLoadsTheSameView(t *testing.T) {
 	root := t.TempDir()
 	clock := newTestClock()
-	memory, err := openMemory(t.Context(), root, clock.Now)
+	memory, err := openMemory(t.Context(), root, clock.Now, newFakeSummarizer())
 	require.NoError(t, err)
 
 	memory.chat.high = 200
@@ -31,7 +35,7 @@ func TestMemoryRestartLoadsTheSameView(t *testing.T) {
 	require.Less(t, len(memory.chat.lines), 100)
 	require.NoError(t, memory.Close())
 
-	memory, err = openMemory(t.Context(), root, clock.Now)
+	memory, err = openMemory(t.Context(), root, clock.Now, newFakeSummarizer())
 	require.NoError(t, err)
 
 	defer func() {
@@ -46,8 +50,35 @@ func TestMemoryRestartLoadsTheSameView(t *testing.T) {
 	require.Equal(t, saved, loaded)
 }
 
+func TestMemoryOpensAfterACrashBeforeTheViewSave(t *testing.T) {
+	root := t.TempDir()
+	clock := newTestClock()
+	memory, err := openMemory(t.Context(), root, clock.Now, newFakeSummarizer())
+	require.NoError(t, err)
+
+	_, err = memory.Append("user", "first")
+	require.NoError(t, err)
+
+	saved, err := os.ReadFile(filepath.Join(root, "view.json"))
+	require.NoError(t, err)
+
+	_, err = memory.Append("user", "second")
+	require.NoError(t, err)
+
+	view := memory.View()
+	require.NoError(t, memory.Close())
+
+	// The log and the tree hold message 1, but the view does not.
+	require.NoError(t, os.WriteFile(filepath.Join(root, "view.json"), saved, 0o600))
+
+	memory, err = openMemory(t.Context(), root, clock.Now, newFakeSummarizer())
+	require.NoError(t, err)
+	require.Equal(t, view, memory.View())
+	require.NoError(t, memory.Close())
+}
+
 func TestMemoryKeepsTheCompactionViewCoarser(t *testing.T) {
-	memory, err := openMemory(t.Context(), t.TempDir(), newTestClock().Now)
+	memory, err := openMemory(t.Context(), t.TempDir(), newTestClock().Now, newFakeSummarizer())
 	require.NoError(t, err)
 
 	defer func() {
@@ -75,8 +106,129 @@ func TestMemoryKeepsTheCompactionViewCoarser(t *testing.T) {
 	}
 }
 
+func TestMemoryRunsAtMostEightBuilds(t *testing.T) {
+	summarizer := newFakeSummarizer()
+	summarizer.gate = make(chan struct{})
+	memory, err := openMemory(t.Context(), t.TempDir(), newTestClock().Now, summarizer)
+	require.NoError(t, err)
+
+	defer func() {
+		require.NoError(t, memory.Close())
+	}()
+
+	for n := range 12 {
+		_, err = memory.Append("echo", memoryLongText(n))
+		require.NoError(t, err)
+	}
+
+	memory.mutex.Lock()
+	running := slices.Collect(maps.Keys(memory.queue.running))
+	memory.mutex.Unlock()
+	slices.SortFunc(running, func(a, b NodeKey) int {
+		return a.index - b.index
+	})
+	require.Equal(t, []NodeKey{{0, 0}, {0, 1}, {0, 2}, {0, 3}, {0, 4}, {0, 5}, {0, 6}, {0, 7}}, running)
+
+	require.Eventually(t, func() bool {
+		return summarizer.Active() == buildMax
+	}, 10*time.Second, time.Millisecond)
+
+	close(summarizer.gate)
+	require.NoError(t, memory.Wait(t.Context()))
+	require.Equal(t, buildMax, summarizer.peak)
+
+	for level, count := range []int{12, 6, 3, 1} {
+		for index := range count {
+			require.True(t, treeIsBuilt(t, memory.tree, level, index), "node (%d, %d)", level, index)
+		}
+	}
+}
+
+func TestMemoryStartsALeafAfterFewerThanEightUnbuilt(t *testing.T) {
+	summarizer := newFakeSummarizer()
+	summarizer.SetFailing(true)
+	memory, err := openMemory(t.Context(), t.TempDir(), newTestClock().Now, summarizer)
+	require.NoError(t, err)
+
+	defer func() {
+		require.NoError(t, memory.Close())
+	}()
+
+	for n := range 9 {
+		_, err = memory.Append("echo", memoryLongText(n))
+		require.NoError(t, err)
+	}
+
+	require.NoError(t, memory.Wait(t.Context()))
+	for _, task := range summarizer.Tasks() {
+		require.Less(t, task.Index, 8)
+	}
+
+	require.False(t, treeIsBuilt(t, memory.tree, 0, 8))
+	summarizer.SetFailing(false)
+
+	_, err = memory.Append("user", "retry")
+	require.NoError(t, err)
+	require.NoError(t, memory.Wait(t.Context()))
+	require.True(t, treeIsBuilt(t, memory.tree, 0, 8))
+	require.True(t, treeIsBuilt(t, memory.tree, 3, 0))
+}
+
+func TestMemoryMergesAfterBothHalves(t *testing.T) {
+	summarizer := newFakeSummarizer()
+	memory, err := openMemory(t.Context(), t.TempDir(), newTestClock().Now, summarizer)
+	require.NoError(t, err)
+
+	defer func() {
+		require.NoError(t, memory.Close())
+	}()
+
+	_, err = memory.Append("echo", memoryLongText(0))
+	require.NoError(t, err)
+	require.NoError(t, memory.Wait(t.Context()))
+
+	_, err = memory.Append("echo", memoryLongText(1))
+	require.NoError(t, err)
+	require.NoError(t, memory.Wait(t.Context()))
+	require.Len(t, summarizer.Tasks(), 3)
+
+	left := treeReadNode(t, memory.tree, 0, 0)
+	right := treeReadNode(t, memory.tree, 0, 1)
+	merge := summarizer.Tasks()[2]
+	require.Equal(t, []string{left.Text, right.Text}, merge.Input)
+	require.Equal(t, "<chat>\n0+1|"+left.Text+"\n1+1|"+right.Text+"\n</chat>", merge.Context)
+	require.True(t, treeIsBuilt(t, memory.tree, 1, 0))
+}
+
+func TestMemoryRestartRestoresTheQueue(t *testing.T) {
+	root := t.TempDir()
+	clock := newTestClock()
+	summarizer := newFakeSummarizer()
+	summarizer.SetFailing(true)
+	memory, err := openMemory(t.Context(), root, clock.Now, summarizer)
+	require.NoError(t, err)
+
+	for n := range 4 {
+		_, err = memory.Append("echo", memoryLongText(n))
+		require.NoError(t, err)
+	}
+
+	require.NoError(t, memory.Wait(t.Context()))
+	require.NoError(t, memory.Close())
+
+	memory, err = openMemory(t.Context(), root, clock.Now, newFakeSummarizer())
+	require.NoError(t, err)
+
+	defer func() {
+		require.NoError(t, memory.Close())
+	}()
+
+	require.NoError(t, memory.Wait(t.Context()))
+	require.True(t, treeIsBuilt(t, memory.tree, 2, 0))
+}
+
 func TestMemoryBuildsFreeParents(t *testing.T) {
-	memory, err := openMemory(t.Context(), t.TempDir(), newTestClock().Now)
+	memory, err := openMemory(t.Context(), t.TempDir(), newTestClock().Now, newFakeSummarizer())
 	require.NoError(t, err)
 
 	defer func() {
@@ -88,29 +240,40 @@ func TestMemoryBuildsFreeParents(t *testing.T) {
 		require.NoError(t, err)
 	}
 
-	node, built := memory.tree.Node(2, 0)
-	require.True(t, built)
+	node := treeReadNode(t, memory.tree, 2, 0)
 	require.Equal(t, "user: a\nuser: b\nuser: c\nuser: d", node.Text)
 }
 
 func TestMemoryKeepsALongMessageOutOfTheView(t *testing.T) {
-	memory, err := openMemory(t.Context(), t.TempDir(), newTestClock().Now)
+	summarizer := newFakeSummarizer()
+	summarizer.SetFailing(true)
+	memory, err := openMemory(t.Context(), t.TempDir(), newTestClock().Now, summarizer)
 	require.NoError(t, err)
 
 	defer func() {
 		require.NoError(t, memory.Close())
 	}()
 
-	_, err = memory.Append("echo", string(make([]byte, nodeBytes)))
+	_, err = memory.Append("echo", memoryLongText(0))
+	require.NoError(t, err)
+	require.NoError(t, memory.Wait(t.Context()))
+	require.Equal(t, "<chat>\n0+1|"+viewPending+"\n</chat>", memory.View())
+
+	summarizer.SetFailing(false)
+
+	_, err = memory.Append("user", "again")
 	require.NoError(t, err)
+	require.NoError(t, memory.Wait(t.Context()))
 
-	require.Equal(t, "<chat>\n0+1|"+pending+"\n</chat>", memory.View())
+	task, err := memory.task(NodeKey{0, 0})
+	require.NoError(t, err)
+	require.Equal(t, "<chat>\n0+1|"+fakeLine(task)+"\n1+1|user: again\n</chat>", memory.View())
 }
 
 func TestMemoryCoversMessagesAfterTheSavedView(t *testing.T) {
 	root := t.TempDir()
 	clock := newTestClock()
-	memory, err := openMemory(t.Context(), root, clock.Now)
+	memory, err := openMemory(t.Context(), root, clock.Now, newFakeSummarizer())
 	require.NoError(t, err)
 
 	_, err = memory.Append("user", "a")
@@ -120,7 +283,7 @@ func TestMemoryCoversMessagesAfterTheSavedView(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, memory.Close())
 
-	memory, err = openMemory(t.Context(), root, clock.Now)
+	memory, err = openMemory(t.Context(), root, clock.Now, newFakeSummarizer())
 	require.NoError(t, err)
 
 	defer func() {
@@ -133,7 +296,7 @@ func TestMemoryCoversMessagesAfterTheSavedView(t *testing.T) {
 func TestMemoryRefusesToRebuildAMissingView(t *testing.T) {
 	root := t.TempDir()
 	clock := newTestClock()
-	memory, err := openMemory(t.Context(), root, clock.Now)
+	memory, err := openMemory(t.Context(), root, clock.Now, newFakeSummarizer())
 	require.NoError(t, err)
 
 	_, err = memory.Append("user", "a")
@@ -141,6 +304,11 @@ func TestMemoryRefusesToRebuildAMissingView(t *testing.T) {
 	require.NoError(t, memory.Close())
 	require.NoError(t, os.Remove(filepath.Join(root, "view.json")))
 
-	_, err = openMemory(t.Context(), root, clock.Now)
-	require.ErrorIs(t, err, errNoView)
+	_, err = openMemory(t.Context(), root, clock.Now, newFakeSummarizer())
+	require.ErrorIs(t, err, errMemoryNoView)
+}
+
+// memoryLongText returns a text that is too long for its own node.
+func memoryLongText(n int) string {
+	return fmt.Sprintf("long %d ", n) + strings.Repeat("x", nodeBytes)
 }