GraphQlAbstract.php

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<?php
namespace Magento\TestFramework\TestCase;

use Magento\TestFramework\Helper\Bootstrap;

abstract class GraphQlAbstract extends WebapiAbstract
{
    private $graphQlClient;

    private $appCache;

    public function graphQlQuery(
        string $query,
        array $variables = [],
        string $operationName = '',
        array $headers = []
    ) {
        return $this->getGraphQlClient()->postQuery(
            $query,
            $variables,
            $operationName,
            $this->composeHeaders($headers)
        );
    }

    private function composeHeaders($headers)
    {
        $headersArray =[];
        foreach ($headers as $key => $value) {
            $headersArray[] = sprintf('%s: %s', $key, $value);
        }
        return $headersArray;
    }

    protected function cleanCache()
    {
        return $this->getAppCache()->clean(\Magento\Framework\App\Config::CACHE_TAG);
    }

    private function getAppCache()
    {
        if (null === $this->appCache) {
            $this->appCache = Bootstrap::getObjectManager()->get(\Magento\Framework\App\Cache::class);
        }
        return $this->appCache;
    }

    private function getGraphQlClient()
    {
        if ($this->graphQlClient === null) {
            $this->graphQlClient = Bootstrap::getObjectManager()->get(
                \Magento\TestFramework\TestCase\GraphQl\Client::class
            );
        }
        return $this->graphQlClient;
    }

    protected function assertResponseFields($actualResponse, $assertionMap)
    {
        foreach ($assertionMap as $key => $assertionData) {
            $expectedValue = isset($assertionData['expected_value'])
                ? $assertionData['expected_value']
                : $assertionData;
            $responseField = isset($assertionData['response_field']) ? $assertionData['response_field'] : $key;
            self::assertNotNull(
                $expectedValue,
                "Value of '{$responseField}' field must not be NULL"
            );
            self::assertEquals(
                $expectedValue,
                $actualResponse[$responseField],
                "Value of '{$responseField}' field in response does not match expected value: "
                . var_export($expectedValue, true)
            );
        }
    }
}