wc-composable-product/tests/Unit/PluginTest.php

<?php
/**
 * Plugin Tests
 *
 * @package Magdev\WcComposableProduct\Tests
 */

namespace Magdev\WcComposableProduct\Tests\Unit;

use Magdev\WcComposableProduct\Tests\TestCase;
use Magdev\WcComposableProduct\Plugin;
use Brain\Monkey\Functions;

class PluginTest extends TestCase
{
    protected function setUp(): void
    {
        parent::setUp();

        // Reset the singleton instance between tests
        $reflection = new \ReflectionClass(Plugin::class);
        $property = $reflection->getProperty('instance');
        $property->setAccessible(true);
        $property->setValue(null, null);
    }

    public function testInstance_ReturnsSingleton(): void
    {
        $instance1 = Plugin::instance();
        $instance2 = Plugin::instance();

        $this->assertSame($instance1, $instance2);
    }

    public function testInstance_ReturnsPluginClass(): void
    {
        $instance = Plugin::instance();

        $this->assertInstanceOf(Plugin::class, $instance);
    }

    public function testAddProductType_AddsComposableToTypes(): void
    {
        $plugin = Plugin::instance();
        $types = $plugin->add_product_type([]);

        $this->assertArrayHasKey('composable', $types);
    }

    public function testProductClass_ReturnsCustomClassForComposable(): void
    {
        $plugin = Plugin::instance();
        $class = $plugin->product_class('WC_Product', 'composable');

        $this->assertSame('Magdev\WcComposableProduct\ProductType', $class);
    }

    public function testProductClass_PassesThroughForOtherTypes(): void
    {
        $plugin = Plugin::instance();
        $class = $plugin->product_class('WC_Product', 'simple');

        $this->assertSame('WC_Product', $class);
    }

    public function testGetTwig_ReturnsTwigEnvironment(): void
    {
        $plugin = Plugin::instance();

        $this->assertInstanceOf(\Twig\Environment::class, $plugin->get_twig());
    }
}