Add integration tests covering the success message after adding a product to cart

Author: avstudnitz

dev/tests/integration/testsuite/Magento/Checkout/Controller/CartTest.php

@@ -300,6 +300,71 @@ public function addAddProductDataProvider()
         ];
     }
 
+    /**
+     * Test for \Magento\Checkout\Controller\Cart\Add::execute() with simple product and activated redirect to cart
+     *
+     * @magentoDataFixture Magento/Catalog/_files/products.php
+     * @magentoConfigFixture current_store checkout/cart/redirect_to_cart 1
+     * @magentoAppIsolation enabled
+     */
+    public function testMessageAtAddToCartWithRedirect()
+    {
+        $formKey = $this->_objectManager->get(FormKey::class);
+        $postData = [
+            'qty' => '1',
+            'product' => '1',
+            'custom_price' => 1,
+            'form_key' => $formKey->getFormKey(),
+            'isAjax' => 1
+        ];
+        \Magento\TestFramework\Helper\Bootstrap::getInstance()->loadArea('frontend');
+        $this->getRequest()->setPostValue($postData);
+
+        $this->dispatch('checkout/cart/add');
+
+        $this->assertEquals('{"backUrl":"http:\/\/localhost\/index.php\/checkout\/cart\/"}', $this->getResponse()->getBody());
+
+        $this->assertSessionMessages(
+            $this->contains(
+                'You added Simple Product to your shopping cart.'
+            ),
+            \Magento\Framework\Message\MessageInterface::TYPE_SUCCESS
+        );
+    }
+
+    /**
+     * Test for \Magento\Checkout\Controller\Cart\Add::execute() with simple product and deactivated redirect to cart
+     *
+     * @magentoDataFixture Magento/Catalog/_files/products.php
+     * @magentoConfigFixture current_store checkout/cart/redirect_to_cart 0
+     * @magentoAppIsolation enabled
+     */
+    public function testMessageAtAddToCartWithoutRedirect()
+    {
+        $formKey = $this->_objectManager->get(FormKey::class);
+        $postData = [
+            'qty' => '1',
+            'product' => '1',
+            'custom_price' => 1,
+            'form_key' => $formKey->getFormKey(),
+            'isAjax' => 1
+        ];
+        \Magento\TestFramework\Helper\Bootstrap::getInstance()->loadArea('frontend');
+        $this->getRequest()->setPostValue($postData);
+
+        $this->dispatch('checkout/cart/add');
+
+        $this->assertFalse($this->getResponse()->isRedirect());
+        $this->assertEquals('[]', $this->getResponse()->getBody());
+
+        $this->assertSessionMessages(
+            $this->contains(
+                "\n" . 'You added Simple Product to your <a href="http://localhost/index.php/checkout/cart/">shopping cart</a>.'
+            ),
+            \Magento\Framework\Message\MessageInterface::TYPE_SUCCESS
+        );
+    }
+
     /**
      * @covers \Magento\Checkout\Controller\Cart\Addgroup::execute()
      *