experiment: better web picker using @pierre/tree (#31208)

packages/app/src/components/pierre-tree.test.ts

@@ -0,0 +1,23 @@
+import { expect, test } from "bun:test"
+import { FileTree, type FileTreeDirectoryHandle } from "@pierre/trees"
+
+test("reports directory expansion changes", () => {
+  const changes: Array<{ path: string; expanded: boolean }> = []
+  const tree = new FileTree({
+    paths: ["src/"],
+    onExpansionChange: (change) => changes.push(change),
+  })
+
+  const src = tree.getItem("src/")
+  if (!src || !src.isDirectory()) throw new Error("Expected src to be a directory")
+  const directory = src as FileTreeDirectoryHandle
+
+  directory.expand()
+  directory.collapse()
+
+  expect(changes).toEqual([
+    { path: "src/", expanded: true },
+    { path: "src/", expanded: false },
+  ])
+  tree.cleanUp()
+})