test: add sample tests (#143)

Author: JustinBeckwith

container/snippets/package.json

@@ -7,13 +7,18 @@
   },
   "repository": "googleapis/nodejs-cloud-container",
   "private": true,
+  "files": [
+    "*.js"
+  ],
   "scripts": {
-    "test": "echo no sample tests 👻"
+    "test": "mocha system-test --timeout 10000"
   },
   "dependencies": {
     "@google-cloud/container": "^0.3.0"
   },
   "devDependencies": {
-    "@google-cloud/nodejs-repo-tools": "^3.0.0"
+    "chai": "^4.2.0",
+    "execa": "^1.0.0",
+    "mocha": "^5.2.0"
   }
 }

container/snippets/quickstart.js

@@ -39,6 +39,7 @@ async function main() {
   };
 
   const [response] = await client.listClusters(request);
+  console.log('Clusters:');
   console.log(response);
   // [END container_quickstart]
 }

container/snippets/system-test/.eslintrc.yml

@@ -1,5 +1,3 @@
 ---
-rules:
-  node/no-unpublished-require: off
-  node/no-unsupported-features: off
-  no-empty: off
+env:
+  mocha: true

container/snippets/system-test/sample.test.js

@@ -0,0 +1,26 @@
+/**
+ * Copyright 2017, Google, Inc.
+ * 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 execa = require('execa');
+
+describe('container samples', () => {
+  it('should run the quickstart', async () => {
+    const {stdout} = await execa.shell('node quickstart');
+    assert.match(stdout, /Clusters:/);
+  });
+});