Issue #2831954 by bojanz, GoZ, vasike: Add test coverage for multicurrency.

modules/price/tests/modules/commerce_price_test/commerce_price_test.services.yml

@@ -3,3 +3,8 @@ services:
     class: Drupal\commerce_price_test\TestPriceResolver
     tags:
       - { name: commerce_price.price_resolver, priority: 100 }
+  commerce_test.test_multicurrency_price_resolver:
+    class: Drupal\commerce_price_test\TestMulticurrencyPriceResolver
+    arguments: ['@language_manager']
+    tags:
+      - { name: commerce_price.price_resolver, priority: 200 }

modules/price/tests/modules/commerce_price_test/src/TestMulticurrencyPriceResolver.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace Drupal\commerce_price_test;
+
+use Drupal\commerce\Context;
+use Drupal\commerce\PurchasableEntityInterface;
+use Drupal\commerce_price\Price;
+use Drupal\commerce_price\Resolver\PriceResolverInterface;
+use Drupal\Core\Language\LanguageManagerInterface;
+
+/**
+ * Test multicurrency price resolver.
+ */
+class TestMulticurrencyPriceResolver implements PriceResolverInterface {
+
+  /**
+   * The language manager.
+   *
+   * @var \Drupal\Core\Language\LanguageManagerInterface
+   */
+  protected $languageManager;
+
+  /**
+   * Constructs a new CommerceMulticurrencyResolver object.
+   *
+   * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
+   *   The language manager.
+   */
+  public function __construct(LanguageManagerInterface $language_manager) {
+    $this->languageManager = $language_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function resolve(PurchasableEntityInterface $entity, $quantity, Context $context) {
+    // Define mapping between language and currency.
+    $currency_by_language = ['fr' => 'EUR'];
+
+    // Get current language.
+    $language = $this->languageManager->getCurrentLanguage()->getId();
+
+    // Get value from currency price field, if exists.
+    if (isset($currency_by_language[$language]) && $entity->hasField('price_' . strtolower($currency_by_language[$language]))) {
+      $price = $entity->get('price_' . strtolower($currency_by_language[$language]))->getValue();
+      $price = reset($price);
+
+      return new Price($price['number'], $price['currency_code']);
+    }
+  }
+
+}

modules/price/tests/src/Kernel/PriceMulticurrencyTest.php

@@ -0,0 +1,124 @@
+<?php
+
+namespace Drupal\Tests\commerce_price\Kernel;
+
+use Drupal\commerce_price\Price;
+use Drupal\commerce_product\Entity\ProductVariation;
+use Drupal\commerce_store\StoreCreationTrait;
+use Drupal\field\Entity\FieldConfig;
+use Drupal\field\Entity\FieldStorageConfig;
+use Drupal\language\Entity\ConfigurableLanguage;
+use Drupal\Tests\commerce\Kernel\CommerceKernelTestBase;
+
+/**
+ * Tests price for multicurrency.
+ *
+ * @group commerce
+ */
+class PriceMulticurrencyTest extends CommerceKernelTestBase {
+
+  use StoreCreationTrait;
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = [
+    'language',
+    'path',
+    'commerce_price_test',
+    'commerce_product',
+  ];
+
+  /**
+   * @var \Drupal\commerce_product\Entity\ProductVariationInterface
+   */
+  protected $variation;
+
+  /**
+   * @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface
+   */
+  protected $productVariationDefaultDisplay;
+
+  /**
+   * @var \Drupal\Core\Entity\EntityViewBuilderInterface
+   */
+  protected $productVariationViewBuilder;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    // Add FR language.
+    ConfigurableLanguage::createFromLangcode('fr')->save();
+    // Import EUR currency.
+    $this->container->get('commerce_price.currency_importer')->import('EUR');
+
+    $this->installEntitySchema('commerce_product_attribute');
+    $this->installEntitySchema('commerce_product_attribute_value');
+    $this->installEntitySchema('commerce_product_variation');
+    $this->installEntitySchema('commerce_product_variation_type');
+    $this->installEntitySchema('commerce_product');
+    $this->installEntitySchema('commerce_product_type');
+    $this->installConfig(['commerce_product']);
+
+    $this->productVariationDefaultDisplay = commerce_get_entity_display('commerce_product_variation', 'default', 'view');
+    $this->productVariationViewBuilder = $this->container->get('entity_type.manager')->getViewBuilder('commerce_product_variation');
+
+    // Create extra Price EUR field.
+    $field_storage = FieldStorageConfig::create([
+      'field_name' => 'price_eur',
+      'entity_type' => 'commerce_product_variation',
+      'type' => 'commerce_price',
+      'cardinality' => 1,
+    ]);
+    $field_storage->save();
+
+    $field = FieldConfig::create([
+      'field_storage' => $field_storage,
+      'bundle' => 'default',
+      'label' => 'Price EUR',
+      'required' => TRUE,
+      'translatable' => FALSE,
+    ]);
+    $field->save();
+
+    // Create product variation.
+    $variation = ProductVariation::create([
+      'type' => 'default',
+      'sku' => strtolower($this->randomMachineName()),
+      'price' => new Price('12.00', 'USD'),
+      'price_eur' => new Price('10.00', 'EUR'),
+    ]);
+    $variation->save();
+    $this->variation = $variation;
+  }
+
+  /**
+   * Tests the multicurrency price.
+   */
+  public function testPriceMulticurrency() {
+    // Set the calculated price formatter which use the price resolver.
+    $this->productVariationDefaultDisplay->setComponent('price', [
+      'type' => 'commerce_price_calculated',
+      'settings' => [],
+    ]);
+    $this->productVariationDefaultDisplay->save();
+
+    // Check the default price.
+    $build = $this->productVariationViewBuilder->viewField($this->variation->price, 'default');
+    $this->render($build);
+    $this->assertText('$12.00');
+
+    // Change the language to 'fr'.
+    \Drupal::configFactory()->getEditable('system.site')->set('default_langcode', 'fr')->save();
+    // Check the price for 'fr' language.
+    $build = $this->productVariationViewBuilder->viewField($this->variation->price, 'default');
+    $this->render($build);
+    $this->assertText('€10.00');
+  }
+
+}