improved invoice handling for fixed rates (#1058)

tests/Invoice/InvoiceItemTest.php

@@ -0,0 +1,39 @@
+<?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\Invoice;
+
+use App\Invoice\InvoiceItem;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers \App\Invoice\InvoiceItem
+ */
+class InvoiceItemTest extends TestCase
+{
+    public function testEmptyObject()
+    {
+        $sut = new InvoiceItem();
+
+        self::assertFalse($sut->isFixedRate());
+        self::assertNull($sut->getHourlyRate());
+        self::assertNull($sut->getFixedRate());
+        self::assertNull($sut->getEnd());
+        self::assertEquals(0.00, $sut->getRate());
+        self::assertNull($sut->getProject());
+        self::assertIsArray($sut->getAdditionalFields());
+        self::assertEmpty($sut->getAdditionalFields());
+        self::assertEquals(0, $sut->getAmount());
+        self::assertNull($sut->getBegin());
+        self::assertNull($sut->getActivity());
+        self::assertNull($sut->getUser());
+        self::assertNull($sut->getDescription());
+        self::assertEquals(0, $sut->getDuration());
+    }
+}