feat: integrate Pi backend and Pi Web

pi-web/lib/file-dirent.test.mjs

@@ -0,0 +1,56 @@
+import assert from "node:assert/strict";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import test from "node:test";
+
+async function loadSubject() {
+  return import("./file-dirent.ts");
+}
+
+test("uses Dirent types for regular files and directories", async () => {
+  const { resolveDirentIsDirectory } = await loadSubject();
+  const file = { isDirectory: () => false, isFile: () => true };
+  const directory = { isDirectory: () => true, isFile: () => false };
+
+  assert.equal(resolveDirentIsDirectory(file, "/unused/file"), false);
+  assert.equal(resolveDirentIsDirectory(directory, "/unused/directory"), true);
+});
+
+test("falls back to stat when the Dirent type is unknown", async (t) => {
+  const { resolveDirentIsDirectory } = await loadSubject();
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), "pi-web-dirent-"));
+  t.after(() => fs.rmSync(root, { recursive: true, force: true }));
+  const directoryPath = path.join(root, "directory");
+  fs.mkdirSync(directoryPath);
+
+  const unknown = { isDirectory: () => false, isFile: () => false };
+  assert.equal(resolveDirentIsDirectory(unknown, directoryPath), true);
+});
+
+test("follows directory symlinks and skips dangling symlinks", async (t) => {
+  const { resolveDirentIsDirectory } = await loadSubject();
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), "pi-web-dirent-"));
+  t.after(() => fs.rmSync(root, { recursive: true, force: true }));
+  fs.mkdirSync(path.join(root, "target"));
+  try {
+    fs.symlinkSync("target", path.join(root, "directory-link"), "dir");
+    fs.symlinkSync("missing", path.join(root, "dangling-link"), "file");
+  } catch (error) {
+    if (error?.code === "EPERM") {
+      t.skip("Creating symbolic links requires additional privileges on this platform");
+      return;
+    }
+    throw error;
+  }
+
+  const symlink = { isDirectory: () => false, isFile: () => false };
+  assert.equal(
+    resolveDirentIsDirectory(symlink, path.join(root, "directory-link")),
+    true,
+  );
+  assert.equal(
+    resolveDirentIsDirectory(symlink, path.join(root, "dangling-link")),
+    null,
+  );
+});