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bundles/KupShop/FeedGeneratorBundle/Tests/Configuration/NodesDenormalizerData.json

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+{
+  "beginning": "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<catalog>",
+  "end": "</catalog>",
+  "nodes": [{
+    "type": "element",
+    "value": "product",
+    "nodes": [
+      {
+        "type": "expression",
+        "value": "some expression",
+        "nodes": []
+      },
+      {
+        "type": "attribute",
+        "value": "some-attribute",
+        "nodes": [{
+          "type": "value",
+          "value": "some's value",
+          "nodes": []
+        }]
+      },
+      {
+        "type": "attribute",
+        "value": "another-attribute",
+        "nodes": [{
+          "type": "value",
+          "value": "another value",
+          "nodes": []
+        }]
+      }
+    ]
+  },
+    {
+      "type": "condition",
+      "value": "some condition",
+      "nodes": [{
+        "type": "cycle",
+        "value": "parameters",
+        "indexAccessName": "",
+        "valueAccessName": "params",
+        "nodes": [{
+          "type": "condition",
+          "value": "",
+          "nodes": [{
+            "type": "element",
+            "value": "some_repeated_element",
+            "nodes": []
+          }]
+        }]
+      }]
+    }
+  ]
+}

bundles/KupShop/FeedGeneratorBundle/Tests/Configuration/NodesDenormalizerTest.php

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+<?php
+
+namespace KupShop\FeedGeneratorBundle\Tests;
+
+use KupShop\FeedGeneratorBundle\Configuration\Configuration;
+use KupShop\FeedGeneratorBundle\Configuration\Nodes\AttributeNode;
+use KupShop\FeedGeneratorBundle\Configuration\Nodes\ConditionNode;
+use KupShop\FeedGeneratorBundle\Configuration\Nodes\CycleNode;
+use KupShop\FeedGeneratorBundle\Configuration\Nodes\ElementNode;
+use KupShop\FeedGeneratorBundle\Configuration\Nodes\ExpressionNode;
+use KupShop\FeedGeneratorBundle\Configuration\Nodes\ValueNode;
+use KupShop\FeedGeneratorBundle\Configuration\NodesDenormalizer;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\PropertyInfo\Extractor\ReflectionExtractor;
+use Symfony\Component\Serializer\Encoder\JsonEncoder;
+use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
+use Symfony\Component\Serializer\Serializer;
+
+class NodesDenormalizerTest extends TestCase
+{
+    public function testJSONDeserialization()
+    {
+        $serializer = new Serializer(
+            [
+                new ObjectNormalizer(
+                    null,
+                    null,
+                    null,
+                    new ReflectionExtractor()
+                ),
+                new NodesDenormalizer(),
+            ],
+            [new JsonEncoder()]
+        );
+
+        $expressionNode = new ExpressionNode();
+        $expressionNode->setType('expression');
+        $expressionNode->setValue('some expression');
+        $valueNode = new ValueNode();
+        $valueNode->setType('value');
+        $valueNode->setValue('some\'s value');
+        $attributeNode = new AttributeNode();
+        $attributeNode->setType('attribute');
+        $attributeNode->setValue('some-attribute');
+        $attributeNode->addNode($valueNode);
+        $anotherValueNode = new ValueNode();
+        $anotherValueNode->setType('value');
+        $anotherValueNode->setValue('another value');
+        $anotherAttributeNode = new AttributeNode();
+        $anotherAttributeNode->setType('attribute');
+        $anotherAttributeNode->setValue('another-attribute');
+        $anotherAttributeNode->addNode($anotherValueNode);
+        $firstNode = new ElementNode();
+        $firstNode->setType('element');
+        $firstNode->setValue('product');
+        $firstNode->setNodes([$expressionNode, $attributeNode, $anotherAttributeNode]);
+        $repeatedElementNode = new ElementNode();
+        $repeatedElementNode->setType('element');
+        $repeatedElementNode->setValue('some_repeated_element');
+        $emptyConditionNode = new ConditionNode();
+        $emptyConditionNode->setType('condition');
+        $emptyConditionNode->setValue('');
+        $emptyConditionNode->setNodes([$repeatedElementNode]);
+        $cycleNode = new CycleNode();
+        $cycleNode->setType('cycle');
+        $cycleNode->setValue('parameters');
+        $cycleNode->setValueAccessName('params');
+        $cycleNode->setNodes([$emptyConditionNode]);
+        $secondNode = new ConditionNode();
+        $secondNode->setType('condition');
+        $secondNode->setValue('some condition');
+        $secondNode->setNodes([$cycleNode]);
+        $configuration = new Configuration();
+        $configuration->setBeginning('<?xml version="1.0" encoding="utf-8"?>'.PHP_EOL.'<catalog>');
+        $configuration->setEnd('</catalog>');
+        $configuration->addNode($firstNode);
+        $configuration->addNode($secondNode);
+
+        $jsonString = file_get_contents(__DIR__.'/NodesDenormalizerData.json');
+        $actualConfiguration = $serializer->deserialize(
+            $jsonString,
+            Configuration::class,
+            'json'
+        );
+
+        $configurationAsReadableString = print_r($configuration, true);
+        $actualConfigurationAsReadableString = print_r($actualConfiguration, true);
+
+        $this->assertEquals(
+            $configurationAsReadableString,
+            $actualConfigurationAsReadableString,
+            'Deserialized JSON configuration does not match!'
+        );
+    }
+}