Fix error: `Argument 1 passed to Jojo1981\DataResolver\Resolver\Conte…

…xt::pushPathPart() must be of the type string, int given, called in...`

src/Resolver/Context.php

@@ -52,12 +52,12 @@ public function getPath(): string
     }
 
     /**
-     * @param string $pathPart
+     * @param int|string $pathPart
      * @return $this
      */
-    public function pushPathPart(string $pathPart): self
+    public function pushPathPart($pathPart): self
     {
-        $this->pathParts[] = $pathPart;
+        $this->pathParts[] = (string) $pathPart;
 
         return $this;
     }

tests/Integration/Resolver/FlattenTest.php

@@ -0,0 +1,57 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of the jojo1981/data-resolver package
+ *
+ * Copyright (c) 2021 Joost Nijhuis <jnijhuis81@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed in the root of the source code
+ */
+namespace tests\Jojo1981\DataResolver\Integration\Resolver;
+
+use Jojo1981\DataResolver\Extractor\Exception\ExtractorException;
+use Jojo1981\DataResolver\Handler\Exception\HandlerException;
+use Jojo1981\DataResolver\Predicate\Exception\PredicateException;
+use PHPUnit\Framework\Exception as PHPUnitException;
+use PHPUnit\Framework\ExpectationFailedException;
+use SebastianBergmann\RecursionContext\InvalidArgumentException;
+use tests\Jojo1981\DataResolver\Integration\AbstractIntegrationTestCase;
+
+/**
+ * @package tests\Jojo1981\DataResolver\Integration\Resolver
+ */
+final class FlattenTest extends AbstractIntegrationTestCase
+{
+    /**
+     * @test
+     * @coversNothing
+     *
+     * @return void
+     * @throws ExtractorException
+     * @throws HandlerException
+     * @throws InvalidArgumentException
+     * @throws PredicateException
+     * @throws PHPUnitException
+     * @throws ExpectationFailedException
+     */
+    public function checkFlatten(): void
+    {
+        $resolver = $this->getResolverBuilderFactory()->create()
+            ->flatten($this->getResolverBuilderFactory()->get('name'))
+            ->build();
+
+        self::assertEquals(['John Doe', 'Jane Doe'], $resolver->resolve($this->getTestData()));
+
+    }
+
+    /**
+     * @return array[]
+     */
+    private function getTestData(): array
+    {
+        return [
+            ['name' => 'John Doe'],
+            ['name' => 'Jane Doe']
+        ];
+    }
+}