1 files changed, 51 insertions, 0 deletions
diff --git a/test/bun.js/some-fs.js b/test/bun.js/some-fs.js
new file mode 100644
index 000000000..e6b31f162
--- /dev/null
+++ b/test/bun.js/some-fs.js
@@ -0,0 +1,51 @@
+const { mkdirSync, existsSync } = require("fs");
+
+var performance = globalThis.performance;
+if (!performance) {
+  try {
+    performance = require("perf_hooks").performance;
+  } catch (e) {}
+}
+
+const count = parseInt(process.env.ITERATIONS || "1", 10) || 1;
+var tempdir = `/tmp/some-fs-test/dir/${Date.now()}/hi`;
+
+for (let i = 0; i < count; i++) {
+  tempdir += `/${i.toString(36)}`;
+}
+
+if (existsSync(tempdir)) {
+  throw new Error(
+    `existsSync reports ${tempdir} exists, but it probably does not`
+  );
+}
+
+var origTempDir = tempdir;
+var iterations = new Array(count * count).fill("");
+var total = 0;
+for (let i = 0; i < count; i++) {
+  for (let j = 0; j < count; j++) {
+    iterations[total++] = `${origTempDir}/${j.toString(36)}-${i.toString(36)}`;
+  }
+}
+tempdir = origTempDir;
+mkdirSync(origTempDir, { recursive: true });
+const recurse = { recursive: false };
+const start = performance.now();
+for (let i = 0; i < total; i++) {
+  mkdirSync(iterations[i], recurse);
+}
+
+console.log("MKDIR " + total + " depth took:", performance.now() - start, "ms");
+
+if (!existsSync(tempdir)) {
+  throw new Error(
+    "Expected directory to exist after mkdirSync, but it doesn't"
+  );
+}
+
+if (mkdirSync(tempdir, { recursive: true })) {
+  throw new Error(
+    "mkdirSync shouldn't return directory name on existing directories"
+  );
+}