build: add CakePHP2 tests bootstrap files

lib/Cake/Test/bootstrap.php

@@ -0,0 +1,29 @@
+<?php
+/**
+ * Bootstrap for phpunit command
+ */
+
+if (!defined('DS')) {
+	define('DS', DIRECTORY_SEPARATOR);
+}
+require_once __DIR__ . DS . 'bootstrap' . DS . 'cake_dot_php.php';
+
+/*
+ * loading of lib/Cake/TestSuite/CakeTestSuiteDispatcher.php
+ * In bootstrap.php, it is sufficient if the const(s) are defined outside the class of CakeTestSuiteDispatcher.php.
+ * However, when loading CakeTestSuiteDispatcher.php in the unit test, a double definition of const(s) error occurs,
+ * so load it here.
+ */
+App::uses('CakeTestSuiteDispatcher', 'TestSuite');
+App::load('CakeTestSuiteDispatcher');
+
+/*
+ * Classes that can be used without declaring App::uses()
+ */
+App::uses('ClassRegistry', 'Utility');
+App::uses('CakeTestCase', 'TestSuite');
+App::uses('CakeTestSuite', 'TestSuite');
+App::uses('ControllerTestCase', 'TestSuite');
+App::uses('CakeTestModel', 'TestSuite/Fixture');
+
+set_error_handler(new \PHPUnit\Util\ErrorHandler(true, true, true, true));

lib/Cake/Test/bootstrap/cake_dot_php.php

@@ -0,0 +1,43 @@
+<?php
+/**
+ * lib/Cake/Console/cake.php initialize
+ */
+
+if (!defined('DS')) {
+	define('DS', DIRECTORY_SEPARATOR);
+}
+
+$dispatcher = 'Cake' . DS . 'Console' . DS . 'ShellDispatcher.php';
+$found = false;
+$paths = explode(PATH_SEPARATOR, ini_get('include_path'));
+
+foreach ($paths as $path) {
+	if (file_exists($path . DS . $dispatcher)) {
+		$found = $path;
+		break;
+	}
+}
+
+if (!$found) {
+	$rootInstall = dirname(dirname(dirname(dirname(__FILE__)))) . DS . $dispatcher;
+	$composerInstall = dirname(dirname(dirname(__FILE__))) . DS . $dispatcher;
+
+	if (file_exists($composerInstall)) {
+		include $composerInstall;
+	} elseif (file_exists($rootInstall)) {
+		include $rootInstall;
+	} else {
+		trigger_error('Could not locate CakePHP core files.', E_USER_ERROR);
+	}
+	unset($rootInstall, $composerInstall);
+
+} else {
+	include $found . DS . $dispatcher;
+}
+
+// In lib/Cake/Console/cake makes app root path.
+$appPath = dirname(__DIR__, 4) . DS . 'app';
+
+new ShellDispatcher([$_SERVER['argv'][0], '-working', $appPath]);
+
+unset($paths, $path, $found, $dispatcher, $appPath);

phpunit.xml.dist

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 		 xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.5/phpunit.xsd"
+		 bootstrap="lib/Cake/Test/bootstrap.php"
 		 backupGlobals="true"
 		 colors="true">
 	<php>