JavaScript: Add test demonstrating more SQL flow.

javascript/ql/test/library-tests/frameworks/SQL/Credentials.expected

@@ -4,6 +4,8 @@
 | mssql3.js:12:13:12:22 | 'password' | password |
 | mysql1.js:6:14:6:17 | 'me' | user name |
 | mysql1.js:7:14:7:21 | 'secret' | password |
+| mysql1a.js:10:9:10:12 | 'me' | user name |
+| mysql1a.js:11:13:11:20 | 'secret' | password |
 | mysql2.js:7:21:7:25 | 'bob' | user name |
 | mysql2.js:8:21:8:28 | 'secret' | password |
 | mysql2tst.js:8:9:8:14 | 'root' | user name |

javascript/ql/test/library-tests/frameworks/SQL/SqlString.expected

@@ -5,6 +5,7 @@
 | mssql2.js:22:24:22:43 | 'select 1 as number' |
 | mysql1.js:13:18:13:43 | 'SELECT ... lution' |
 | mysql1.js:18:18:22:1 | {\\n    s ... vid']\\n} |
+| mysql1a.js:17:18:17:43 | 'SELECT ... lution' |
 | mysql2.js:12:12:12:37 | 'SELECT ... lution' |
 | mysql2tst.js:14:3:14:62 | 'SELECT ... ` > 45' |
 | mysql2tst.js:23:3:23:56 | 'SELECT ... e` > ?' |

javascript/ql/test/library-tests/frameworks/SQL/mysql1a.js

@@ -0,0 +1,24 @@
+// Adapted from the documentation of https://github.com/mysqljs/mysql,
+// which is licensed under the MIT license; see file mysqljs-License.
+
+function importMySql() {
+  return require("mysql");
+}
+
+var connection = importMySql().createConnection({
+  host: 'localhost',
+  user: 'me',
+  password: 'secret',
+  database: 'my_db'
+});
+
+connection.connect();
+
+connection.query('SELECT 1 + 1 AS solution', function (error, results, fields) {
+  if (error) throw error;
+  console.log('The solution is: ', results[0].solution);
+});
+
+connection.end();
+
+exports.connection = connection;