fix: fix sample tests (#79)

Author: JustinBeckwith

asset/snippets/package.json

@@ -1,7 +1,6 @@
 {
   "name": "@google-cloud/asset-samples",
   "description": "Samples for the Cloud Asset API Client Library for Node.js.",
-  "version": "0.0.1",
   "license": "Apache-2.0",
   "author": "Google Inc.",
   "engines": {
@@ -12,24 +11,18 @@
   ],
   "repository": "googleapis/nodejs-asset",
   "private": true,
-  "nyc": {
-    "exclude": [
-      "**/*.test.js"
-    ]
-  },
   "scripts": {
     "test": "mocha system-test --timeout 20000"
   },
   "dependencies": {
     "@google-cloud/asset": "^0.1.1",
     "@google-cloud/storage": "^2.3.0",
-    "express": "^4.16.4",
     "uuid": "^3.3.2",
     "yargs": "^12.0.0"
   },
   "devDependencies": {
-    "@google-cloud/nodejs-repo-tools": "^3.0.0",
-    "mocha": "^5.2.0",
-    "sinon": "^7.0.0"
+    "chai": "^4.2.0",
+    "execa": "^1.0.0",
+    "mocha": "^5.2.0"
   }
 }

asset/snippets/system-test/quickstart.test.js

@@ -15,21 +15,20 @@
 
 'use strict';
 
-const assert = require('assert');
+const {assert} = require('chai');
 const path = require('path');
-const tools = require('@google-cloud/nodejs-repo-tools');
 const uuid = require('uuid');
+const execa = require('execa');
+const {Storage} = require('@google-cloud/storage');
+
 const cwd = path.join(__dirname, '..');
 const cmd = 'node quickstart.js';
 
-const {Storage} = require('@google-cloud/storage');
-
 const storage = new Storage();
 const bucketName = `asset-nodejs-${uuid.v4()}`;
 const bucket = storage.bucket(bucketName);
 
 describe('quickstart sample tests', () => {
-  before(tools.checkCredentials);
   before(async () => {
     await bucket.create();
   });
@@ -40,7 +39,7 @@ describe('quickstart sample tests', () => {
 
   it('should export assets to specified path', async () => {
     const dumpFilePath = `gs://${bucketName}/my-assets.txt`;
-    await tools.runAsyncWithIO(`${cmd} export-assets ${dumpFilePath}`, cwd);
+    await execa.shell(`${cmd} export-assets ${dumpFilePath}`, {cwd});
     const file = await bucket.file('my-assets.txt');
     const exists = await file.exists();
     assert.ok(exists);
@@ -49,12 +48,10 @@ describe('quickstart sample tests', () => {
 
   it('should get assets history successfully', async () => {
     const assetName = `//storage.googleapis.com/${bucketName}`;
-    const output = await tools.runAsyncWithIO(
+    const {stdout} = await execa.shell(
       `${cmd} batch-get-history ${assetName}`,
-      cwd
+      {cwd}
     );
-    if (output.stdout) {
-      assert.ok(output.stdout.includes(assetName));
-    }
+    assert.match(stdout, new RegExp(assetName));
   });
 });