feat: add MockCommon for shared test helpers and mocks

Author: datamweb

system/Boot.php

@@ -149,6 +149,9 @@ public static function bootTest(Paths $paths): void
         static::setExceptionHandler();
         static::initializeKint();
         static::autoloadHelpers();
+
+        // Global test helpers and mocks for all tests
+        require_once ROOTPATH . 'tests/_support/MockCommon.php';
     }
 
     /**

tests/_support/MockCommon.php

@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Tests\Support;
+
+/**
+ * MockCommon.php
+ *
+ * Shared mocks and helpers for all tests in CodeIgniter 4.
+ * Loaded automatically during `Boot::bootTest()`.
+ *
+ * Purpose:
+ *  - Provide global mock functions like `is_cli()`
+ *  - Keep tests isolated and maintainable
+ *
+ * How to extend:
+ *  - Add new helper functions below
+ *  - Keep mocks idempotent to avoid side effects
+ */
+
+// ---------------------------------------------------
+// Environment helpers
+// ---------------------------------------------------
+if (! function_exists('is_cli')) {
+    /**
+     * Force non-CLI environment for tests
+     */
+    function is_cli(): bool
+    {
+        return false;
+    }
+}
+
+// ---------------------------------------------------
+// Placeholder for additional mocks/helpers
+// ---------------------------------------------------
+// Add any other test helpers here, e.g., logger mocks, cache mocks, etc.