wc-bootstrap/tests/Stubs/TwigService.php

<?php
/**
 * Stub for WPBootstrap\Twig\TwigService.
 *
 * Provides just enough surface for TemplateOverride to resolve
 * and render templates during unit tests.
 */

namespace WPBootstrap\Twig;

class TwigService
{
    private static ?self $instance = null;

    /** @var callable|null Render callback set by tests. */
    private static $renderCallback = null;

    public static function getInstance(): self
    {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    /**
     * Allow tests to override the render behaviour.
     */
    public static function setRenderCallback(?callable $callback): void
    {
        self::$renderCallback = $callback;
    }

    /**
     * Render a template with the given context.
     */
    public function render(string $template, array $context = []): string
    {
        if (null !== self::$renderCallback) {
            return (self::$renderCallback)($template, $context);
        }
        return '';
    }

    /**
     * Reset singleton between tests.
     */
    public static function reset(): void
    {
        self::$instance = null;
        self::$renderCallback = null;
    }
}