Support objects with integer keys. Fixes #1

.scrutinizer.yml

@@ -0,0 +1,25 @@
+checks:
+  php:
+    code_rating: true
+
+filter:
+  excluded_paths:
+    - tests/*
+    - vendor/*
+
+build:
+  environment:
+    php: '7.3'
+
+  dependencies:
+    before:
+      - composer install
+      - mkdir -p build/logs
+
+  tests:
+    override:
+      -
+        command: 'bin/phpunit --coverage-clover build/logs/clover.xml'
+        coverage:
+          file: 'build/logs/clover.xml'
+          format: 'clover'

composer.json

@@ -20,7 +20,8 @@
     "require-dev": {
         "phpunit/phpunit": "^6.5",
         "paysera/lib-php-cs-fixer-config": "^2.2.2",
-        "mockery/mockery": "^1.2"
+        "mockery/mockery": "^1.2",
+        "ext-json": "*"
     },
     "config": {
         "bin-dir": "bin"

src/DataFilter.php

@@ -37,6 +37,7 @@ private function filterObject($data, NormalizationContext $context)
     {
         $result = new stdClass();
         foreach ($data as $key => $value) {
+            $key = (string)$key;
             if ($value !== null && $context->isFieldIncluded($key)) {
                 $result->$key = $this->filterData($value, $context->createScopedContext($key));
             }

tests/DataFilterTest.php

@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Paysera\Component\Normalization\Tests;
+
+use Mockery;
+use Mockery\Adapter\Phpunit\MockeryTestCase;
+use Paysera\Component\Normalization\CoreNormalizer;
+use Paysera\Component\Normalization\DataFilter;
+use Paysera\Component\Normalization\NormalizationContext;
+use stdClass;
+
+class DataFilterTest extends MockeryTestCase
+{
+
+    /**
+     * @dataProvider providerForFilterDataWithoutFiltering
+     * @param string $expected
+     * @param mixed $input
+     */
+    public function testFilterDataWithoutFiltering(string $expected, $input)
+    {
+        $normalizer = Mockery::mock(CoreNormalizer::class);
+        $context = new NormalizationContext($normalizer);
+
+        $dataFilter = new DataFilter();
+
+        $output = $dataFilter->filterData($input, $context);
+        $this->assertEquals($expected, json_encode($output));
+    }
+
+    public function providerForFilterDataWithoutFiltering()
+    {
+        return [
+            ['{}', new stdClass()],
+            ['[]', []],
+            ['{"a":"b"}', ['a' => 'b']],
+            ['{"a":"b","1":2}', ['a' => 'b', 1 => 2]],
+            ['[1,2]', [0 => 1, 1 => 2]],
+            ['{"0":1,"2":2}', [0 => 1, 2 => 2]],
+        ];
+    }
+}