feat: integrate Pi backend and Pi Web

2026-10-03 02:59:35 +00:00 · 2026-07-30 19:37:53 +08:00
commit 7392ab9dd7
1390 changed files with 337197 additions and 0 deletions
@@ -0,0 +1,43 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+async function loadSubject() {
+  return import("./chat-lazy-load.ts");
+}
+
+test("shows only the last visible render items", async () => {
+  const { getVisibleRenderWindow } = await loadSubject();
+  assert.deepEqual(getVisibleRenderWindow(200, 50), { startIndex: 150, hasMore: true });
+});
+
+test("shows all render items when the visible count reaches the total", async () => {
+  const { getVisibleRenderWindow } = await loadSubject();
+  assert.deepEqual(getVisibleRenderWindow(30, 50), { startIndex: 0, hasMore: false });
+  assert.deepEqual(getVisibleRenderWindow(50, 50), { startIndex: 0, hasMore: false });
+  assert.deepEqual(getVisibleRenderWindow(0, 50), { startIndex: 0, hasMore: false });
+});
+
+test("continues paging when render items outnumber source messages", async () => {
+  const { getNextVisibleCount, getVisibleRenderWindow } = await loadSubject();
+  let visibleCount = 50;
+
+  visibleCount = getNextVisibleCount(visibleCount);
+  assert.deepEqual(getVisibleRenderWindow(120, visibleCount), { startIndex: 20, hasMore: true });
+
+  visibleCount = getNextVisibleCount(visibleCount);
+  assert.deepEqual(getVisibleRenderWindow(120, visibleCount), { startIndex: 0, hasMore: false });
+});
+
+test("restores the viewport after prepending content", async () => {
+  const { captureScrollDistance, restoreScrollTop } = await loadSubject();
+  const savedDistance = captureScrollDistance(2000, 500);
+
+  assert.equal(savedDistance, 1500);
+  assert.equal(restoreScrollTop(2500, savedDistance), 1000);
+});
+
+test("restores top and bottom boundary positions", async () => {
+  const { captureScrollDistance, restoreScrollTop } = await loadSubject();
+  assert.equal(restoreScrollTop(3000, captureScrollDistance(2000, 0)), 1000);
+  assert.equal(restoreScrollTop(3000, captureScrollDistance(2000, 2000)), 3000);
+});