docs: improve the quickstart sample (#172)

packages/google-cloud-oslogin/samples/package.json

@@ -1,25 +1,23 @@
 {
   "name": "nodejs-docs-samples-os-login",
-  "version": "0.0.1",
   "license": "Apache-2.0",
   "author": "Google Inc.",
   "engines": {
     "node": ">=8"
   },
+  "files": [
+    "*.js"
+  ],
   "repository": "googleapis/nodejs-os-login",
   "private": true,
-  "semistandard": {
-    "ignore": [
-      "node_modules"
-    ]
-  },
   "scripts": {
-    "test": "node -e 'console.log(`no tests`)'"
+    "test": "mocha"
   },
   "dependencies": {
     "@google-cloud/os-login": "^0.3.2"
   },
   "devDependencies": {
-    "@google-cloud/nodejs-repo-tools": "^3.0.0"
+    "chai": "^4.2.0",
+    "mocha": "^6.1.4"
   }
 }

packages/google-cloud-oslogin/samples/quickstart.js

@@ -16,30 +16,19 @@
 
 async function main() {
   // [START oslogin_quickstart]
-  if (
-    !process.env.GCLOUD_PROJECT ||
-    !process.env.GOOGLE_APPLICATION_CREDENTIALS
-  ) {
-    throw new Error(
-      'Usage: GCLOUD_PROJECT=<project_id> GOOGLE_APPLICATION_CREDENTIALS=<path to key json file> node #{$0}'
-    );
+  const {OsLoginServiceClient} = require('@google-cloud/os-login');
+  const client = new OsLoginServiceClient();
+
+  async function quickstart() {
+    const [loginProfile] = await client.getLoginProfile({
+      name: 'users/[email protected]',
+    });
+    console.log('Login Profile:');
+    console.log(loginProfile);
   }
 
-  const oslogin = require('@google-cloud/os-login');
-
-  const projectId = process.env.GCLOUD_PROJECT;
-
-  const client = new oslogin.OsLoginServiceClient({
-    projectId: projectId,
-  });
-
-  const request = {
-    name: 'users/1234abcd',
-  };
-
-  const [loginProfile] = await client.getLoginProfile(request);
-  console.log(loginProfile);
+  quickstart();
   // [END oslogin_quickstart]
 }
 
-main().catch(console.error);
+main();

packages/google-cloud-oslogin/samples/test/.eslintrc.yml

@@ -0,0 +1,3 @@
+---
+env:
+  mocha: true

packages/google-cloud-oslogin/samples/test/sample.test.js

@@ -0,0 +1,29 @@
+// Copyright 2019, Google LLC All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+const {assert} = require('chai');
+const {execSync} = require('child_process');
+
+const exec = cmd => execSync(cmd, {encoding: 'utf8'});
+
+describe('sample tests', () => {
+  // This test current fails because it requires setup in the google-cloud-node
+  // project, running VMs, and a fair amount of infrastructure.
+  it.skip('should run the quickstart', () => {
+    const output = exec('node quickstart');
+    assert.include(output, 'Login Profile:');
+  });
+});