Issue #73: Add Jest test suite for unit/regression testing. One examp…

CHANGELOG.md

@@ -16,6 +16,7 @@ Commit: <>
 - Issue [#60](https://github.com/KCarlile/flashchord/issues/60): Add changelog to About page.
 - About page updates: adding new tech and adding donors.
 - Issue [#80](https://github.com/KCarlile/flashchord/issues/80): Updated to Twitter Bootstrap 5.2-beta.
+- Issue [#73](https://github.com/KCarlile/flashchord/issues/73): Add Jest test suite for unit/regression testing.
 
 ## Release 1.7
 

README.md

@@ -29,6 +29,8 @@ For logging functionality, see the `js/utils.js` file and look at the following
 - PHP
 - [Parsedown for Markdown parsing](https://parsedown.org/)
   - Composer for dependency management
+- Jest for unit testing of JavaScript
+  - Run Jest using `./test` from the command line
 
 ## Creator
 

about.php

@@ -54,6 +54,7 @@
             <li><a href="https://www.w3.org/Style/CSS/">CSS</a></li>
             <li><a href="https://getbootstrap.com/">Bootstrap</a></li>
             <li><a href="https://parsedown.org/">Parsedown</a></li>
+            <li><a href="https://jestjs.io/">Jest JS</a></li>
             <li><a href="https://getcomposer.org/">Composer</a></li>
             <li><a href="https://git-scm.com/">Git</a></li>
             <li><a href="https://github.com/">GitHub</a></li>

js2/Controller.js

@@ -0,0 +1,5 @@
+class Controller {
+    constructor() {
+
+    }
+}

js2/Logger.js

@@ -0,0 +1,91 @@
+/**
+ * Logger class provides an easy way to log to Chrome's console and includes section dividers.
+ * 
+ * Tested via /tests/Logger.test.js.
+ */
+module.exports = class Logger {
+    enabled = false;
+
+    /**
+     * Default constructor assumes debugging to be disabled.
+     * 
+     * @param {boolean} enabled 
+     */
+    constructor(enabled) {
+        this.enabled = enabled;
+    }
+
+    /**
+     * Response with true if logging is enabled, false if logging is disabled.
+     * 
+     * @returns {boolean} Status of logging enablement.
+     */
+    isEnabled() {
+        return this.enabled;
+    }
+
+    /**
+     * Enables logging even if Logger was instantiated with logging disabled.
+     */
+    enableLogging() {
+        this.enabled = true;
+    }
+
+    /**
+     * Disables logging even if Logger was instantiated with logging enabled.
+     */
+    disableLogging() {
+        this.enabled = false;
+    }
+
+    /**
+     * Logs a message to the console if debugging is enabled.
+     * 
+     * @param {string} message  The message to be written to console.log().
+     * @param {boolean} override    Overrides the instance-level setting for logging enabled.
+     * @returns {boolean} True if the console.log() command succeeded; false if not.
+     */
+    logger(message, override = false) {
+        let success = false;
+
+        if (this.enabled || override) {
+            try {
+                console.log(message);
+
+                success = true;
+            }
+            catch (exception) {
+                throw "Console.log not available."
+            }
+        }
+
+        return success;
+    }
+
+    /**
+     * Prints a new section divider to the console if logging is enabled.
+     * 
+     * @param {boolean} override 
+     * @param {boolean} override    Overrides the instance-level setting for logging enabled.
+     * @returns {boolean} True if the console.log() command succeeded; false if not.
+     */
+    loggerNewSection(override = false) {
+        return this.logger("==========", override);
+    }
+
+    // start a new sub-block of logging with a light line if logging is enabled
+
+    /**
+     * Prints a sub-block divider line to the console if logging is enabled.
+     * @param {boolean} override    Overrides the instance-level setting for logging enabled.
+     * @returns {boolean} True if the console.log() command succeeded; false if not.
+     */
+    /**
+     * 
+     * @param {*} override 
+     * @returns 
+     */
+    loggerNewBlock(override = false) {
+        return this.logger("----------", override);
+    }
+}