[API][Shop] Add missing contract test for getting only countries from…

… current channel

tests/Api/DataFixtures/ORM/channel_with_countries.yaml

@@ -0,0 +1,26 @@
+Sylius\Component\Core\Model\Channel:
+    channel_web:
+        code: 'WEB'
+        name: 'Web Channel'
+        hostname: 'localhost'
+        contactEmail: '[email protected]'
+        description: 'Lorem ipsum'
+        baseCurrency: '@currency_usd'
+        defaultLocale: '@locale_en'
+        locales: ['@locale_en', '@locale_pl']
+        color: 'black'
+        enabled: true
+        taxCalculationStrategy: 'order_items_based'
+        countries: ['@country_US', '@country_FR']
+
+Sylius\Component\Currency\Model\Currency:
+    currency_usd:
+        code: 'USD'
+
+Sylius\Component\Locale\Model\Locale:
+    locale_en:
+        code: 'en_US'
+    locale_pl:
+        code: 'pl_PL'
+    locale_de:
+        code: 'de_DE'

tests/Api/Responses/shop/country/get_countries_from_channel_response.json

@@ -0,0 +1,35 @@
+{
+    "@context": "\/api\/v2\/contexts\/Country",
+    "@id": "\/api\/v2\/shop\/countries",
+    "@type": "hydra:Collection",
+    "hydra:member": [
+        {
+            "@id": "\/api\/v2\/shop\/countries\/US",
+            "@type": "Country",
+            "code": "US",
+            "name": "United States",
+            "provinces": [
+                {
+                    "@id": "\/api\/v2\/shop\/provinces\/US-MI",
+                    "@type": "Province",
+                    "code": "US-MI",
+                    "name": "Minnesota"
+                },
+                {
+                    "@id": "\/api\/v2\/shop\/provinces\/US-WY",
+                    "@type": "Province",
+                    "code": "US-WY",
+                    "name": "Wyoming"
+                }
+            ]
+        },
+        {
+            "@id": "\/api\/v2\/shop\/countries\/FR",
+            "@type": "Country",
+            "code": "FR",
+            "name": "France",
+            "provinces": []
+        }
+    ],
+    "hydra:totalItems": 2
+}

tests/Api/Shop/CountriesTest.php

@@ -29,6 +29,17 @@ public function it_gets_countries(): void
         $this->assertResponse($response, 'shop/country/get_countries_response', Response::HTTP_OK);
     }
 
+    /** @test */
+    public function it_gets_only_countries_from_current_channel(): void
+    {
+        $this->loadFixturesFromFiles(['channel_with_countries.yaml', 'country.yaml']);
+
+        $this->client->request(method: 'GET', uri: '/api/v2/shop/countries', server: self::CONTENT_TYPE_HEADER);
+        $response = $this->client->getResponse();
+
+        $this->assertResponse($response, 'shop/country/get_countries_from_channel_response', Response::HTTP_OK);
+    }
+
     /** @test */
     public function it_gets_a_country(): void
     {