Added Test constructor

lib/Test.js

@@ -1,5 +1,10 @@
 'use strict';
 
+// Import user defined modules
+const DatabaseConnectionPool = require('./DatabaseConnectionPool');
+
+const TestTemplate = require('./TestTemplate');
+
 /**
  * A class that represents the date of a test
  */
@@ -16,13 +21,75 @@ class TestDate extends Date {
 }
 
 class Test {
-	testId;
-	testTemplateId;
+	/**
+	 * The id of the test
+	 * @type {string}
+	 */
+	id;
+
+	/**
+	 * The id of the test template it is based on
+	 * @type {string}
+	 */
+	templateId;
+
+	/**
+	 * The test template object that it is based on
+	 * @type {TestTemplate}
+	 */
+	template;
+
+	/**
+	 * The id of the class it is assigned to
+	 * @type {string}
+	 */
 	classId;
-	testDate;
 
-	constructor () {
+	/**
+	 * The test date in epoch seconds
+	 * @type {number}
+	 */
+	epochDate;
 
+	/**
+	 * The test date
+	 * @type {TestDate}
+	 */
+	date;
+
+	/**
+	 * @param {string} testId - The id of the test to fetch
+	 */
+	constructor(testId) {
+		const sql = `
+			select
+				testId as id,
+				testTemplateId as templateId,
+				classId,
+				UNIX_TIMESTAMP(testDate) as epochDate
+			from
+				test
+			where
+				testId = ?;
+		`;
+
+		return (async () => {
+			const conn = await new DatabaseConnectionPool();
+			const record = await conn.runQuery(sql, [
+				testId,
+			]);
+
+			if (!record.length)
+				throw new Error('No test found');
+
+			for (const [ k, v ] of Object.entries(record[0]))
+				this[k] = v;
+
+			this.date = new TestDate(this.epochDate * 1000);
+			this.template = await new TestTemplate(this.templateId);
+
+			return this;
+		})();
 	}
 
 	get class() {