WP-LIT-MCP/tests/Unit/Integrations/WordPress/Render/PageRendererTest.php

<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Integrations\WordPress\Render;

use Brain\Monkey\Filters;
use Brain\Monkey\Functions;
use LIT\MCP\Integrations\WordPress\Render\PageRenderer;
use LIT\MCP\Tests\Unit\TestCase;
use RuntimeException;
use WP_Post;

final class PageRendererTest extends TestCase
{
    protected function tearDown(): void
    {
        unset($GLOBALS['post']);
        parent::tearDown();
    }

    public function testRendersTheContentFilterAndRestoresTheGlobalPost(): void
    {
        $previous = new WP_Post(['ID' => 1]);
        $GLOBALS['post'] = $previous;
        $post = new WP_Post(['ID' => 7, 'post_content' => '<!-- wp:divi/section /-->']);
        $setup = [];
        Functions\when('setup_postdata')->alias(static function (WP_Post $p) use (&$setup): bool {
            $setup[] = $p->ID;

            return true;
        });
        Filters\expectApplied('the_content')->once()->with('<!-- wp:divi/section /-->')->andReturnUsing(
            static function () use ($post): string {
                echo '<p>echoed</p>';

                return $GLOBALS['post'] === $post ? '<div class="et_pb_section"></div>' : 'wrong post';
            }
        );

        $html = (new PageRenderer())->render($post);

        self::assertSame('<p>echoed</p><div class="et_pb_section"></div>', $html);
        self::assertSame($previous, $GLOBALS['post']);
        self::assertSame([7, 1], $setup);
    }

    public function testRestoresEvenWhenRenderingThrows(): void
    {
        Functions\when('setup_postdata')->justReturn(true);
        Functions\expect('wp_reset_postdata')->once();
        Filters\expectApplied('the_content')->once()->andReturnUsing(static function (): string {
            throw new RuntimeException('module crashed');
        });

        try {
            (new PageRenderer())->render(new WP_Post(['ID' => 7]));
            self::fail('exception expected');
        } catch (RuntimeException) {
            self::assertArrayHasKey('post', $GLOBALS);
            self::assertNull($GLOBALS['post']);
        }
    }
}