[Init] Initial commit - NetMesh terminal manager

domain/chatJumpNav.test.ts

@@ -0,0 +1,71 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import {
+  buildChatJumpEntries,
+  chatMessageDomId,
+  resolveTailCountForJumpTarget,
+  truncateChatJumpLabel,
+} from './chatJumpNav.ts';
+
+test('truncateChatJumpLabel collapses whitespace and ellipsizes', () => {
+  assert.equal(truncateChatJumpLabel('  hello   world  '), 'hello world');
+  assert.equal(
+    truncateChatJumpLabel('a'.repeat(40), 10),
+    `${'a'.repeat(7)}...`,
+  );
+  assert.equal(truncateChatJumpLabel('   '), '');
+});
+
+test('buildChatJumpEntries returns empty until the minimum user-turn threshold', () => {
+  const messages = [
+    { id: 'u1', role: 'user', content: 'one' },
+    { id: 'a1', role: 'assistant', content: 'ok' },
+    { id: 'u2', role: 'user', content: 'two' },
+  ];
+  assert.deepEqual(buildChatJumpEntries(messages), []);
+  assert.equal(
+    buildChatJumpEntries([
+      ...messages,
+      { id: 'u3', role: 'user', content: 'three' },
+    ]).length,
+    3,
+  );
+});
+
+test('buildChatJumpEntries uses empty label fallback and skips non-user roles', () => {
+  const entries = buildChatJumpEntries(
+    [
+      { id: 's', role: 'system', content: 'ignore' },
+      { id: 'u1', role: 'user', content: '   ' },
+      { id: 't', role: 'tool', content: 'tool' },
+      { id: 'u2', role: 'user', content: 'second' },
+      { id: 'u3', role: 'user', content: 'third' },
+    ],
+    { emptyLabel: '(empty)' },
+  );
+  assert.deepEqual(entries, [
+    { messageId: 'u1', label: '(empty)', index: 1 },
+    { messageId: 'u2', label: 'second', index: 2 },
+    { messageId: 'u3', label: 'third', index: 3 },
+  ]);
+});
+
+test('resolveTailCountForJumpTarget expands only when the target is outside the window', () => {
+  const visible = [{ id: 'a' }, { id: 'b' }, { id: 'c' }, { id: 'd' }, { id: 'e' }];
+  assert.equal(resolveTailCountForJumpTarget(visible, 'd', 2), 2);
+  assert.equal(resolveTailCountForJumpTarget(visible, 'b', 2), 4);
+  assert.equal(resolveTailCountForJumpTarget(visible, 'missing', 2), 2);
+});
+
+test('resolveTailCountForJumpTarget grows with appends so a pinned target stays mounted', () => {
+  const before = [{ id: 'a' }, { id: 'b' }, { id: 'c' }, { id: 'd' }, { id: 'e' }];
+  const afterJump = resolveTailCountForJumpTarget(before, 'b', 2);
+  assert.equal(afterJump, 4);
+  // slice(-4) on a longer list would drop 'b' unless the count is re-resolved.
+  const afterAppend = [...before, { id: 'f' }, { id: 'g' }];
+  assert.equal(resolveTailCountForJumpTarget(afterAppend, 'b', afterJump), 6);
+});
+
+test('chatMessageDomId prefixes message ids for DOM anchors', () => {
+  assert.equal(chatMessageDomId('msg-12'), 'ai-chat-msg-msg-12');
+});