Load the framework while testing in order to allow for additional tests

application/config/testing/routes.php

@@ -0,0 +1,20 @@
+<?php defined('BASEPATH') or exit('No direct script access allowed');
+
+/*
+| -------------------------------------------------------------------------
+| TESTING ROUTES
+| -------------------------------------------------------------------------
+| The following routes are defined in order for CI to be able to process 
+| test execution requests via the CLI. 
+|
+| The Test controller class is used as a placeholder for this purpose.
+|
+*/
+
+$route['default_controller'] = 'test/index';
+$route['404_override'] = 'test/index'; // when in doubt, use the hammer
+$route['translate_uri_dashes'] = FALSE;
+
+
+/* End of file routes.php */
+/* Location: ./application/config/testing/routes.php */

application/controllers/Test.php

@@ -0,0 +1,39 @@
+<?php defined('BASEPATH') or exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Online Appointment Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) Alex Tselegidis
+ * @license     https://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        https://easyappointments.org
+ * @since       v1.5.0
+ * ---------------------------------------------------------------------------- */
+
+/*
+ * This file can only be used in a testing environment and only from the termninal.
+ */
+
+if (ENVIRONMENT !== 'testing' || ! is_cli())
+{
+    show_404();
+}
+
+/**
+ * Test controller.
+ *
+ * This controller does not have or need any logic, it is just used so that CI can be loaded properly during the test
+ * execution.
+ */
+class Test extends EA_Controller {
+    /**
+     * Placeholder callback.
+     *
+     * @return void
+     */
+    public function index(): void
+    {
+        //
+    }
+}

composer.json

@@ -45,6 +45,11 @@
         "phpunit/phpunit": "^10.0.18"
     },
     "scripts": {
-        "test": "php vendor/bin/phpunit"
+        "test": "APP_ENV=testing php vendor/bin/phpunit"
+    },
+    "autoload": {
+        "psr-4": {
+            "Tests\\": "tests/"
+        }
     }
 }

index.php

@@ -89,7 +89,17 @@ require_once __DIR__ . '/vendor/autoload.php';
  *
  * NOTE: If you change these, also change the error_reporting() code below
  */
-define('ENVIRONMENT', (Config::DEBUG_MODE) ? 'development' : 'production');
+
+$app_env = getenv('APP_ENV');
+
+if ($app_env)
+{
+    define('ENVIRONMENT', $app_env);
+}
+else
+{
+    define('ENVIRONMENT', (Config::DEBUG_MODE) ? 'development' : 'production');
+}
 
 /*
  *---------------------------------------------------------------

phpunit.xml

@@ -1,7 +1,7 @@
 <phpunit
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd"
-    bootstrap="tests/bootstrap.php"
+    bootstrap="index.php"
     colors="true"
     cacheResult="false"
 >

tests/TestCase.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Tests;
+
+use CI_Controller;
+use EA_Controller;
+use PHPUnit\Framework\TestCase as PHPUnitTestCase;
+
+/**
+ * Parent test case sharing common test functionality.
+ */
+class TestCase extends PHPUnitTestCase {
+    /**
+     * @var EA_Controller|CI_Controller
+     */
+    private static EA_Controller|CI_Controller $CI;
+
+    /**
+     * Load the framework instance.
+     *
+     * @return void
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$CI =& get_instance();
+    }
+}

tests/Unit/Helper/ArrayHelperTest.php

@@ -1,28 +1,26 @@
 <?php
 
-namespace Unit\Helper;
+namespace Tests\Unit\Helper;
 
-use PHPUnit\Framework\TestCase;
-
-require_once __DIR__ . '/../../../application/helpers/array_helper.php';
+use Tests\TestCase;
 
 class ArrayHelperTest extends TestCase {
-    public function testIsAssocReturnsTrueOnAssociativeArray()
+    public function testIsAssocReturnsTrueOnAssociativeArray(): void
     {
         $this->assertTrue(is_assoc(['test' => 'value']));
     }
 
-    public function testIsAssocReturnsFalseOnIndexedArray()
+    public function testIsAssocReturnsFalseOnIndexedArray(): void
     {
         $this->assertFalse(is_assoc(['one', 'two', 'three']));
     }
 
-    public function testIsAssocReturnsTrueOnMixedArray()
+    public function testIsAssocReturnsTrueOnMixedArray(): void
     {
         $this->assertTrue(is_assoc(['one', 'two', 'three' => 'value']));
     }
 
-    public function testArrayFindReturnsCorrectElement()
+    public function testArrayFindReturnsCorrectElement(): void
     {
         $arr = [
             [
@@ -39,7 +37,7 @@ class ArrayHelperTest extends TestCase {
         $this->assertSame($arr[0], array_find($arr, fn($element) => $element['id'] === 1));
     }
 
-    public function testArrayFieldsReturnsStrippedArray()
+    public function testArrayFieldsReturnsStrippedArray(): void
     {
         $arr = [
             'name' => 'John',

tests/Unit/Helper/ValidationHelperTest.php

@@ -1,10 +1,8 @@
 <?php
 
-namespace Unit\Helper;
+namespace Tests\Unit\Helper;
 
-use PHPUnit\Framework\TestCase;
-
-require_once __DIR__ . '/../../../application/helpers/validation_helper.php';
+use Tests\TestCase;
 
 class ValidationHelperTest extends TestCase {
     public function testValidateDateTimeReturnsTrueOnValidValue()

tests/bootstrap.php

@@ -1,5 +0,0 @@
-<?php
-
-require_once __DIR__ . '/../vendor/autoload.php';
-
-define('BASEPATH', __DIR__ . '/../system');