allow to delete invoice documents (#2968)

tests/Event/InvoiceDocumentsEventTest.php

@@ -0,0 +1,40 @@
+<?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\Event;
+
+use App\Entity\InvoiceDocument;
+use App\Event\InvoiceDocumentsEvent;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers \App\Event\InvoiceDocumentsEvent
+ */
+class InvoiceDocumentsEventTest extends TestCase
+{
+    public function testDefaultValues()
+    {
+        $sut = new InvoiceDocumentsEvent([]);
+
+        self::assertEquals([], $sut->getInvoiceDocuments());
+        self::assertEquals(99, $sut->getMaximumAllowedDocuments());
+
+        $sut->setMaximumAllowedDocuments(10);
+        self::assertEquals(10, $sut->getMaximumAllowedDocuments());
+
+        $file = new \SplFileInfo(__FILE__);
+        $document = new InvoiceDocument($file);
+
+        $sut->setInvoiceDocuments([$document]);
+        self::assertEquals([$document], $sut->getInvoiceDocuments());
+
+        $sut->addInvoiceDocuments(new InvoiceDocument($file));
+        self::assertCount(2, $sut->getInvoiceDocuments());
+    }
+}