Fix tests for sf <= 3.2

Author: Jeremiah VALERIE

Tests/Functional/App/config/argumentWrapper/config.yml

@@ -16,15 +16,14 @@ overblog_graphql:
 services:
     expression_function_instance_of:
         class: Symfony\Component\ExpressionLanguage\ExpressionFunction
-        factory: Symfony\Component\ExpressionLanguage\ExpressionFunction::fromPhp
-        arguments:
-            - 'is_a'
+        factory: Overblog\GraphQLBundle\Tests\Functional\TestCase::expressionFunctionFromPhp
+        arguments: ['is_a']
         tags:
             - { name: overblog_graphql.expression_function }
+
     expression_function_json_encode:
         class: Symfony\Component\ExpressionLanguage\ExpressionFunction
-        factory: Symfony\Component\ExpressionLanguage\ExpressionFunction::fromPhp
-        arguments:
-            - 'json_encode'
+        factory: Overblog\GraphQLBundle\Tests\Functional\TestCase::expressionFunctionFromPhp
+        arguments: ['json_encode']
         tags:
             - { name: overblog_graphql.expression_function }

Tests/Functional/TestCase.php

@@ -2,6 +2,7 @@
 
 namespace Overblog\GraphQLBundle\Tests\Functional;
 
+use Overblog\GraphQLBundle\ExpressionLanguage\ExpressionFunction;
 use Overblog\GraphQLBundle\Tests\Functional\App\TestKernel;
 use Symfony\Bundle\FrameworkBundle\Client;
 use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
@@ -132,4 +133,15 @@ protected static function sendRequest(Client $client, $query, $isDecoded = false
 
         return $isDecoded ? json_decode($result, true) : $result;
     }
+
+    public static function expressionFunctionFromPhp($phpFunctionName)
+    {
+        if (is_callable([ExpressionFunction::class, 'fromPhp'])) {
+            return call_user_func([ExpressionFunction::class, 'fromPhp'], $phpFunctionName);
+        }
+
+        return new ExpressionFunction($phpFunctionName, function () use ($phpFunctionName) {
+            return sprintf('\%s(%s)', $phpFunctionName, implode(', ', func_get_args()));
+        });
+    }
 }