Preflight and integration npx (#1096)

integration-tests/write_file.test.js

@@ -0,0 +1,21 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { test } from 'node:test';
+import { strict as assert } from 'assert';
+import { TestRig } from './test-helper.js';
+
+test('should be able to write a file', async (t) => {
+  const rig = new TestRig();
+  rig.setup(t.name);
+  const prompt = `show me an example of using the write tool. put a dad joke in dad.txt`;
+
+  await rig.run(prompt);
+  const newFilePath = 'dad.txt';
+
+  const newFileContent = rig.readFile(newFilePath);
+  assert.notEqual(newFileContent, '');
+});