new API endpoint to save invoice meta-fields (#5916)

tests/Mocks/InvoiceTestMetaFieldSubscriberMock.php

@@ -0,0 +1,45 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Tests\Mocks;
+
+use App\Entity\InvoiceMeta;
+use App\Event\InvoiceMetaDefinitionEvent;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\Form\Extension\Core\Type\IntegerType;
+use Symfony\Component\Form\Extension\Core\Type\TextType;
+use Symfony\Component\Validator\Constraints\Length;
+
+class InvoiceTestMetaFieldSubscriberMock implements EventSubscriberInterface
+{
+    public static function getSubscribedEvents(): array
+    {
+        return [
+            InvoiceMetaDefinitionEvent::class => ['loadMeta', 200],
+        ];
+    }
+
+    public function loadMeta(InvoiceMetaDefinitionEvent $event): void
+    {
+        $definition = (new InvoiceMeta())
+            ->setName('metatestmock')
+            ->setType(TextType::class)
+            ->addConstraint(new Length(['max' => 200]))
+            ->setIsVisible(true);
+
+        $event->getEntity()->setMetaField($definition);
+
+        $definition = (new InvoiceMeta())
+            ->setName('foobar')
+            ->setType(IntegerType::class)
+            ->setIsVisible(false);
+
+        $event->getEntity()->setMetaField($definition);
+    }
+}