Add GCF SQL samples (#723)

* Initial commit of SQL samples

* Move some deps to devDeps

Author: Ace Nassri

functions/sql/index.js

@@ -0,0 +1,91 @@
+/**
+ * Copyright 2018, Google LLC.
+ * 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 process = require('process'); // Allow env variable mocking
+
+// [START functions_sql_mysql]
+const mysql = require('mysql');
+// [END functions_sql_mysql]
+
+// [START functions_sql_postgres]
+const pg = require('pg');
+// [END functions_sql_postgres]
+
+// [START functions_sql_mysql]
+// [START functions_sql_postgres]
+
+/**
+ * TODO(developer): specify SQL connection details
+ */
+const connectionName = process.env.INSTANCE_CONNECTION_NAME || '<YOUR INSTANCE CONNECTION NAME>';
+const dbUser = process.env.SQL_USER || '<YOUR DB USER>';
+const dbPassword = process.env.SQL_PASSWORD || '<YOUR DB PASSWORD>';
+const dbName = process.env.SQL_NAME || '<YOUR DB NAME>';
+
+// [END functions_sql_postgres]
+// [END functions_sql_mysql]
+
+// [START functions_sql_mysql]
+const mysqlConfig = {
+  connectionLimit: 1,
+  user: dbUser,
+  password: dbPassword,
+  database: dbName
+};
+if (process.env.NODE_ENV === 'production') {
+  mysqlConfig.socketPath = `/cloudsql/${connectionName}`;
+}
+
+const mysqlPool = mysql.createPool(mysqlConfig);
+
+exports.mysqlDemo = (req, res) => {
+  mysqlPool.query('SELECT NOW() AS now', (err, results) => {
+    if (err) {
+      console.error(err);
+      res.status(500).send(err);
+    } else {
+      res.send(JSON.stringify(results));
+    }
+  });
+};
+// [END functions_sql_mysql]
+
+// [START functions_sql_postgres]
+const pgConfig = {
+  max: 1,
+  user: dbUser,
+  password: dbPassword,
+  database: dbName
+};
+
+if (process.env.NODE_ENV === 'production') {
+  pgConfig.socketPath = `/cloudsql/${connectionName}`;
+}
+
+const pgPool = new pg.Pool(pgConfig);
+
+exports.postgresDemo = (req, res) => {
+  pgPool.query('SELECT NOW() as now', (err, results) => {
+    if (err) {
+      console.error(err);
+      res.status(500).send(err);
+    } else {
+      res.send(JSON.stringify(results));
+    }
+  });
+};
+// [END functions_sql_postgres]

functions/sql/package.json

@@ -0,0 +1,47 @@
+{
+  "name": "nodejs-docs-samples-functions-sql",
+  "version": "0.0.1",
+  "private": true,
+  "license": "Apache-2.0",
+  "author": "Google Inc.",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/GoogleCloudPlatform/nodejs-docs-samples.git"
+  },
+  "engines": {
+    "node": ">=4.3.2"
+  },
+  "scripts": {
+    "start-proxy-mysql": "cloud_sql_proxy -instances=$INSTANCE_CONNECTION_NAME-mysql=tcp:3306 &",
+    "start-proxy-pg": "cloud_sql_proxy -instances=$INSTANCE_CONNECTION_NAME-pg=tcp:5432 &",
+    "start-proxy": "! pgrep cloud_sql_proxy > /dev/null && npm run start-proxy-pg && npm run start-proxy-mysql || exit 0",
+    "kill-proxy": "killall cloud_sql_proxy",
+    "lint": "repo-tools lint",
+    "pretest": "npm run lint",
+    "ava": "ava -T 20s --verbose test/*.test.js",
+    "test": "npm run start-proxy && npm run ava && npm run kill-proxy"
+  },
+  "dependencies": {
+    "mysql": "^2.16.0",
+    "pg": "^7.4.3"
+  },
+  "devDependencies": {
+    "@google-cloud/nodejs-repo-tools": "^2.3.3",
+    "ava": "0.25.0",
+    "proxyquire": "^2.1.0",
+    "semistandard": "^12.0.1",
+    "sinon": "4.4.2"
+  },
+  "cloud-repo-tools": {
+    "requiresKeyFile": true,
+    "requiresProjectId": true,
+    "requiredEnvVars": [
+      "MYSQL_USER",
+      "MYSQL_PASSWORD",
+      "MYSQL_DATABASE",
+      "POSTGRES_USER",
+      "POSTGRES_PASSWORD",
+      "POSTGRES_DATABASE"
+    ]
+  }
+}

functions/sql/test/index.test.js

@@ -0,0 +1,80 @@
+/**
+ * Copyright 2018, Google LLC.
+ * 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 sinon = require(`sinon`);
+const test = require(`ava`);
+const proxyquire = require(`proxyquire`);
+
+const INSTANCE_PREFIX = `nodejs-docs-samples:us-central1:integration-tests-instance`;
+
+const getProgram = (env) => {
+  return proxyquire(`../`, {
+    process: {
+      env: env
+    }
+  });
+};
+
+test(`should query MySQL`, async (t) => {
+  const program = getProgram({
+    INSTANCE_CONNECTION_NAME: `${INSTANCE_PREFIX}-mysql`,
+    SQL_USER: process.env.MYSQL_USER,
+    SQL_PASSWORD: process.env.MYSQL_PASSWORD,
+    SQL_NAME: process.env.MYSQL_DATABASE
+  });
+
+  const resMock = {
+    status: sinon.stub().returnsThis(),
+    send: sinon.stub()
+  };
+
+  program.mysqlDemo(null, resMock);
+
+  // Give the query time to complete
+  await new Promise(resolve => { setTimeout(resolve, 1500); });
+
+  t.false(resMock.status.called);
+  t.true(resMock.send.calledOnce);
+
+  const response = resMock.send.firstCall.args[0];
+  t.regex(response, /\d{4}-\d{1,2}-\d{1,2}/);
+});
+
+test(`should query Postgres`, async (t) => {
+  const program = getProgram({
+    INSTANCE_CONNECTION_NAME: `${INSTANCE_PREFIX}-pg`,
+    SQL_USER: process.env.POSTGRES_USER,
+    SQL_PASSWORD: process.env.POSTGRES_PASSWORD,
+    SQL_NAME: process.env.POSTGRES_DATABASE
+  });
+
+  const resMock = {
+    status: sinon.stub().returnsThis(),
+    send: sinon.stub()
+  };
+
+  program.postgresDemo(null, resMock);
+
+  // Give the query time to complete
+  await new Promise(resolve => { setTimeout(resolve, 1500); });
+
+  t.false(resMock.status.called);
+  t.true(resMock.send.calledOnce);
+
+  const response = resMock.send.firstCall.args[0];
+  t.regex(response, /\d{4}-\d{1,2}-\d{1,2}/);
+});