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

   1 package main
   2
   3 import (
   4         "os"
   5         "path/filepath"
   6         "strings"
   7         "testing"
   8
   9         "github.com/stretchr/testify/require"
  10 )
  11
  12 func TestFreeLeafHoldsAShortMessageWordForWord(t *testing.T) {
  13         message := Message{
  14                 ID:   7,
  15                 Kind: "user",
  16                 Text: strings.Repeat("a", nodeBytes-len("user: ")),
  17         }
  18
  19         node, free := freeLeaf(message)
  20         require.True(t, free)
  21         require.Equal(t, Node{
  22                 Level: 0,
  23                 Index: 7,
  24                 Text:  "user: " + message.Text,
  25                 Size:  nodeBytes,
  26         }, node)
  27
  28         message.Text += "a"
  29         _, free = freeLeaf(message)
  30         require.False(t, free)
  31 }
  32
  33 func TestFreeMergeJoinsShortSiblings(t *testing.T) {
  34         left := testNode(1, 2, "left")
  35         right := testNode(1, 3, "right")
  36
  37         node, free := freeMerge(left, right)
  38         require.True(t, free)
  39         require.Equal(t, testNode(2, 1, "left\nright"), node)
  40
  41         right = testNode(1, 3, strings.Repeat("r", nodeBytes-len("left")))
  42         _, free = freeMerge(left, right)
  43         require.False(t, free)
  44 }
  45
  46 func TestTreeBuildsEachNodeOnce(t *testing.T) {
  47         tree, err := openTree(t.Context(), t.TempDir(), 2, newTestClock().Now)
  48         require.NoError(t, err)
  49
  50         defer func() {
  51                 require.NoError(t, tree.Close())
  52         }()
  53
  54         require.NoError(t, tree.Add(testNode(0, 0, "user: a")))
  55         require.ErrorContains(t, tree.Add(testNode(0, 0, "user: b")), "already built")
  56         require.ErrorContains(t, tree.Add(testNode(1, 0, "a b")), "child that is not built")
  57
  58         require.NoError(t, tree.Add(testNode(0, 1, "unii: b")))
  59         require.NoError(t, tree.Add(testNode(1, 0, "a b")))
  60
  61         node, built := tree.Node(0, 0)
  62         require.True(t, built)
  63         require.Equal(t, "user: a", node.Text)
  64 }
  65
  66 func TestTreeReopenLoadsTheSameNodes(t *testing.T) {
  67         root := t.TempDir()
  68         clock := newTestClock()
  69         tree, err := openTree(t.Context(), root, 2, clock.Now)
  70         require.NoError(t, err)
  71
  72         nodes := []Node{
  73                 testNode(0, 1, "unii: b"),
  74                 testNode(0, 0, "user: a"),
  75                 testNode(1, 0, "user: a\nunii: b"),
  76         }
  77         for _, node := range nodes {
  78                 require.NoError(t, tree.Add(node))
  79         }
  80
  81         require.NoError(t, tree.Close())
  82
  83         data, err := os.ReadFile(filepath.Join(root, "tree", "2026-01-01.jsonl"))
  84         require.NoError(t, err)
  85         require.Equal(t, `{"l":0,"i":1,"text":"unii: b","size":7}`+"\n", strings.SplitAfter(string(data), "\n")[0])
  86
  87         tree, err = openTree(t.Context(), root, 2, clock.Now)
  88         require.NoError(t, err)
  89
  90         defer func() {
  91                 require.NoError(t, tree.Close())
  92         }()
  93
  94         require.Len(t, tree.nodes, len(nodes))
  95         for _, node := range nodes {
  96                 loaded, built := tree.Node(node.Level, node.Index)
  97                 require.True(t, built)
  98                 require.Equal(t, node, loaded)
  99         }
 100
 101         _, err = openTree(t.Context(), root, 1, clock.Now)
 102         require.ErrorContains(t, err, "covers messages after the log")
 103 }
 104
 105 func testNode(level, index int, text string) Node {
 106         return Node{
 107                 Level: level,
 108                 Index: index,
 109                 Text:  text,
 110                 Size:  len(text),
 111         }
 112 }