fix(napi): improve napi_adjust_external_memory (#17501)

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1 files changed, 11 insertions, 0 deletions

diff --git a/test_napi/mem_test.js b/test_napi/mem_test.js
new file mode 100644
index 000000000..bdbd395d3
--- /dev/null
+++ b/test_napi/mem_test.js
@@ -0,0 +1,11 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+import { assert, loadTestLibrary } from "./common.js";
+
+const mem = loadTestLibrary();
+
+Deno.test("napi adjust external memory", function () {
+  const adjusted = mem.adjust_external_memory();
+  assert(typeof adjusted === "number");
+  assert(adjusted > 0);
+});