fix: improve the samples and tests (#236)

samples/package.json

@@ -5,7 +5,9 @@
   "license": "Apache-2.0",
   "author": "Google Inc.",
   "repository": "googleapis/nodejs-compute",
-  "files": [ "*.js" ],
+  "files": [
+    "*.js"
+  ],
   "engines": {
     "node": ">=8"
   },
@@ -25,6 +27,8 @@
   },
   "devDependencies": {
     "@google-cloud/nodejs-repo-tools": "^3.0.0",
+    "chai": "^4.2.0",
+    "execa": "^1.0.0",
     "mocha": "^5.0.0",
     "proxyquire": "^2.0.1"
   }

samples/startup-script/index.js

@@ -19,10 +19,13 @@ const Compute = require('@google-cloud/compute');
 const fetch = require('node-fetch');
 
 const compute = new Compute();
-
 const zone = compute.zone('us-central1-a');
 
-async function createVm(name) {
+/**
+ * Create a new virtual machine with Ubuntu and Apache
+ * @param {string} name Name of the virtual machine
+ */
+async function createVM(name) {
   // Create a new VM, using default ubuntu image. The startup script
   // installs apache and a custom homepage.
 
@@ -34,7 +37,7 @@ async function createVm(name) {
         {
           key: 'startup-script',
           value: `#! /bin/bash
-    
+
             # Installs apache and a custom homepage
             apt-get update
             apt-get install -y apache2
@@ -46,21 +49,35 @@ async function createVm(name) {
       ],
     },
   };
-  const vmObj = zone.vm(name);
-  console.log('Creating VM ...');
-  const [vm, operation] = await vmObj.create(config);
+
+  const vm = zone.vm(name);
+
+  console.log(`Creating VM ${name}...`);
+  const [, operation] = await vm.create(config);
+
+  console.log(`Polling operation ${operation.id}...`);
   await operation.promise();
+
+  console.log('Acquiring VM metadata...');
   const [metadata] = await vm.getMetadata();
+  console.log(metadata);
 
   // External IP of the VM.
   const ip = metadata.networkInterfaces[0].accessConfigs[0].natIP;
   console.log(`Booting new VM with IP http://${ip}...`);
 
   // Ping the VM to determine when the HTTP server is ready.
+  console.log(`Operation complete. Waiting for IP ...`);
   await pingVM(ip);
+
+  console.log(`${name} created succesfully`);
   return ip;
 }
 
+/**
+ * Poll a given IP address until it returns a result.
+ * @param {string} ip IP address to poll
+ */
 async function pingVM(ip) {
   let waiting = true;
   while (waiting) {
@@ -80,10 +97,12 @@ async function pingVM(ip) {
     }
   }
 }
-// List all VMs and their external IPs in a given zone.
-async function listVms() {
+/**
+ * List all VMs and their external IPs in a given zone.
+ */
+async function listVMs() {
   const [vms] = await zone.getVMs();
-  return await Promise.all(
+  const results = await Promise.all(
     vms.map(async vm => {
       const [metadata] = await vm.getMetadata();
       return {
@@ -94,31 +113,26 @@ async function listVms() {
       };
     })
   );
+  console.log(results);
+  return results;
 }
 
-async function deleteVm(name) {
+/**
+ * Delete a VM with a given name.
+ * @param {string} name
+ */
+async function deleteVM(name) {
   const vm = zone.vm(name);
-  console.log('Deleting ...');
+  console.log(`Deleting ${name} ...`);
   const [operation] = await vm.delete();
+  console.log(`Polling operation ${operation.id} ...`);
   await operation.promise();
-  // VM deleted
+  console.log(`${name} deleted succesfully!`);
   return name;
 }
 
-exports.create = async name => {
-  const ip = await createVm(name);
-  console.log(`${name} created succesfully`);
-  return ip;
-};
-
-exports.list = async () => {
-  const vms = await listVms();
-  console.log(vms);
-  return vms;
-};
-
-exports.delete = async name => {
-  const result = await deleteVm(name);
-  console.log(`${name} deleted succesfully`);
-  return result;
+module.exports = {
+  createVM,
+  deleteVM,
+  listVMs,
 };

samples/startup-script/system-test/index.test.js

@@ -15,36 +15,26 @@
 
 'use strict';
 
-const tools = require(`@google-cloud/nodejs-repo-tools`);
 const uuid = require('uuid');
 const assert = require('assert');
 
-const example = require(`../index`);
+const example = require('../index');
+const name = `gcloud-apache-${uuid.v4().split('-')[0]}`;
 
 describe('start-up script', async () => {
-  before(tools.checkCredentials);
-  beforeEach(tools.stubConsole);
-  afterEach(tools.restoreConsole);
-
-  const TESTS_PREFIX = 'gcloud-tests-';
-  const name = generateName('vm-with-apache');
-
-  function generateName(customPrefix) {
-    return [TESTS_PREFIX, customPrefix + '-', uuid.v4().replace('-', '')]
-      .join('')
-      .substr(0, 61);
-  }
   it('should create vm', async () => {
-    const ip = await example.create(name);
+    const ip = await example.createVM(name);
     assert.ok(ip);
   });
+
   it('should list vms', async () => {
-    const vms = await example.list();
+    const vms = await example.listVMs();
     assert.ok(vms);
-    assert.strictEqual(Array.isArray(vms), true);
+    assert.ok(Array.isArray(vms));
   });
+
   it('should delete vm', async () => {
-    const result = await example.delete(name);
+    const result = await example.deleteVM(name);
     assert.strictEqual(result, name);
   });
 });

samples/system-test/vms.test.js

@@ -15,17 +15,16 @@
 
 'use strict';
 
-const tools = require(`@google-cloud/nodejs-repo-tools`);
+const execa = require('execa');
 const path = require(`path`);
-const assert = require('assert');
+const {assert} = require('chai');
 
 const cmd = `node vms.js`;
 const cwd = path.join(__dirname, `..`);
 
-describe('should retrieve list of vms', function() {
-  it('vms_inspect_string', async function() {
-    const output = await tools.runAsync(cmd, cwd);
-
-    assert.strictEqual(output.includes('VMs:'), true);
+describe('should retrieve list of vms', () => {
+  it('vms_inspect_string', async () => {
+    const {stdout} = await execa.shell(cmd, {cwd});
+    assert.match(stdout, /^VMs:/);
   });
 });

samples/system-test/vms_api.test.js

@@ -15,17 +15,16 @@
 
 'use strict';
 
-const tools = require(`@google-cloud/nodejs-repo-tools`);
+const execa = require(`execa`);
 const path = require(`path`);
-const assert = require('assert');
+const {assert} = require('chai');
 
 const cmd = `node vms_api.js`;
 const cwd = path.join(__dirname, `..`);
 
-describe('should retrieve list of vms via api', function() {
-  it('vms_api_inspect_string', async function() {
-    const output = await tools.runAsync(cmd, cwd);
-
-    assert.strictEqual(output.includes('VMs:'), true);
+describe('should retrieve list of vms via api', () => {
+  it('vms_api_inspect_string', async () => {
+    const {stdout} = await execa.shell(cmd, {cwd});
+    assert.match(stdout, /^VMs:/);
   });
 });

samples/vms_api.js

@@ -17,51 +17,32 @@
 
 // [START complete]
 // [START initialize]
-const google = require('googleapis').google;
+const {google} = require('googleapis');
 const compute = google.compute('v1');
 // [END initialize]
 
-// [START auth]
-async function auth() {
-  const data = await google.auth.getApplicationDefault();
-  let authClient = data.credential;
-  const projectId = authClient.projectId;
-
-  // The createScopedRequired method returns true when running on GAE or a
-  // local developer machine. In that case, the desired scopes must be passed
-  // in manually. When the code is  running in GCE or GAE Flexible, the scopes
-  // are pulled from the GCE metadata server.
-  // See https://cloud.google.com/compute/docs/authentication for more
-  // information.
-  if (authClient.createScopedRequired && authClient.createScopedRequired()) {
-    // Scopes can be specified either as an array or as a single,
-    // space-delimited string.
-    authClient = authClient.createScoped([
-      'https://www.googleapis.com/auth/cloud-platform',
-      'https://www.googleapis.com/auth/compute',
-      'https://www.googleapis.com/auth/compute.readonly',
-    ]);
-    authClient.projectId = projectId;
-  }
-
-  return authClient;
-}
-// [END auth]
-
 // [START list]
 /**
  * @param {Function} callback Callback function.
  */
 async function getVmsExample() {
-  const authClient = await auth();
+  const authClient = await google.auth.getClient({
+    scopes: [
+      'https://www.googleapis.com/auth/cloud-platform',
+      'https://www.googleapis.com/auth/compute',
+      'https://www.googleapis.com/auth/compute.readonly',
+    ],
+  });
+  const projectId = await google.auth.getProjectId();
 
   // Retrieve the vms
-  const vms = await compute.instances.aggregatedList({
+  const result = await compute.instances.aggregatedList({
     auth: authClient,
-    project: authClient.projectId,
+    project: projectId,
     // In this example we only want one VM per page
     maxResults: 1,
   });
+  const vms = result.data;
   console.log('VMs:', vms);
   return vms;
 }