Split db utility modules down into individual parts

utility/db/cleanDb.js

@@ -0,0 +1,33 @@
+'use strict';
+
+// Import required modules
+const path = require('path');
+
+// Import user defined modules
+const DatabaseConnectionPool =
+	require(path.join(__dirname, '../../lib/DatabaseConnectionPool'));
+
+// Import test data object
+const { data } = require('./testData');
+
+/**
+ * cleanDb() Removes all records from the tables in the database to be inserted
+ * into
+ *
+ * @return {void}
+ */
+async function cleanDb() {
+	const conn = await new DatabaseConnectionPool();
+
+	// Remove records from tables in reverse order to which they depend on
+	// each other
+	const tables = Object.keys(data).reverse();
+	tables.push('sessions');
+
+	for (const table of tables)
+		await conn.runQuery(`DELETE FROM ${table};`);
+
+	conn.close();
+}
+
+module.exports = cleanDb;