agent updates

test/assertions.test.js

@@ -0,0 +1,14 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+
+const Assertions = require('../src/helper/assertionUtils.js');
+
+test('assertNoNaN does not throw for valid nested arrays', () => {
+  const assertions = new Assertions();
+  assert.doesNotThrow(() => assertions.assertNoNaN([1, [2, 3, [4]]]));
+});
+
+test('assertNoNaN throws when NaN exists in nested arrays', () => {
+  const assertions = new Assertions();
+  assert.throws(() => assertions.assertNoNaN([1, [2, NaN]]), /NaN detected/);
+});