From baff9fd04261715cd0aa5968b8bd6a4dff7311b5 Mon Sep 17 00:00:00 2001
From: "paseo-bot[bot]" <266920839+paseo-bot[bot]@users.noreply.github.com>
Date: Sun, 18 Oct 2026 06:59:52 +0200
Subject: [PATCH] test(server): retain million-file directory search
 reproduction

---
 ...ectory-search-million-files.local.test.mjs | 75 +++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 scripts/directory-search-million-files.local.test.mjs

diff --git a/scripts/directory-search-million-files.local.test.mjs b/scripts/directory-search-million-files.local.test.mjs
new file mode 100644
index 0000000000..a68dab81e1
--- /dev/null
+++ b/scripts/directory-search-million-files.local.test.mjs
@@ -0,0 +1,75 @@
+// Local regression for #7100. Creates one million real files; not part of routine CI.
+// node --test scripts/directory-search-million-files.local.test.mjs
+// DIRECTORY_SEARCH_MODULE can select a historical copy of directory-suggestions.ts.
+// DIRECTORY_SEARCH_FIXTURE can reuse an existing fixture with the layout below.
+import assert from "node:assert/strict";
+import { spawnSync } from "node:child_process";
+import { closeSync, mkdirSync, mkdtempSync, openSync, rmSync } from "node:fs";
+import { tmpdir } from "node:os";
+import path from "node:path";
+import { after, before, test } from "node:test";
+import { pathToFileURL } from "node:url";
+
+const reusedFixture = process.env.DIRECTORY_SEARCH_FIXTURE;
+const root = reusedFixture || mkdtempSync(path.join(tmpdir(), "paseo-million-files-"));
+const moduleUrl = pathToFileURL(
+  path.resolve(
+    process.env.DIRECTORY_SEARCH_MODULE || "packages/server/src/utils/directory-suggestions.ts",
+  ),
+).href;
+
+before(() => {
+  if (reusedFixture) return;
+  for (const directory of ["data/clips", "projects/app/src", "projects/site"]) {
+    mkdirSync(path.join(root, directory), { recursive: true });
+  }
+  for (let index = 0; index < 1_000_000; index += 1) {
+    closeSync(openSync(path.join(root, "data/clips", `clip-${index}.txt`), "w"));
+  }
+});
+after(() => {
+  if (!reusedFixture) rmSync(root, { recursive: true, force: true });
+});
+
+for (const [query, expected] of [
+  ["app", ["projects/app", "projects/app/src"]],
+  ["src", ["projects/app/src"]],
+  ["~/projects/", ["projects", "projects/app", "projects/app/src", "projects/site"]],
+]) {
+  test(`directory search ${query} survives a million-file sibling at 256 MiB heap`, () => {
+    const source = `
+      const { searchDirectoryEntries } = await import(${JSON.stringify(moduleUrl)});
+      const path = await import("node:path");
+      const root = ${JSON.stringify(root)};
+      const results = await searchDirectoryEntries({
+        root, query: ${JSON.stringify(query)}, pathFormat: "absolute",
+        includeFiles: false, includeDirectories: true, pathQueryPolicy: "rooted",
+        rootAliases: ["~"], blankQueryBehavior: "none",
+        confidentResultScanThreshold: 5000, limit: 30,
+      });
+      console.log(JSON.stringify(results.map(entry => path.relative(root, entry.path).split(path.sep).join("/")).sort()));
+    `;
+    const result = spawnSync(
+      process.execPath,
+      [
+        "--max-old-space-size=256",
+        "--conditions=source",
+        "--import",
+        "tsx",
+        "--input-type=module",
+        "--eval",
+        source,
+      ],
+      { encoding: "utf8", timeout: 60_000 },
+    );
+    assert.deepEqual(
+      {
+        status: result.status,
+        signal: result.signal,
+        outOfMemory: result.stderr.includes("heap out of memory"),
+      },
+      { status: 0, signal: null, outOfMemory: false },
+    );
+    assert.deepEqual(JSON.parse(result.stdout), expected);
+  });
+}