added explicit classes for widgets (#3170)

tests/Event/RevenueStatisticEventTest.php

@@ -0,0 +1,44 @@
+<?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\Event\RevenueStatisticEvent;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers \App\Event\RevenueStatisticEvent
+ */
+class RevenueStatisticEventTest extends TestCase
+{
+    public function testDefaultValues()
+    {
+        $sut = new RevenueStatisticEvent(null, null);
+
+        self::assertNull($sut->getEnd());
+        self::assertNull($sut->getBegin());
+        self::assertSame(0.0, $sut->getRevenue());
+
+        $end = new \DateTime();
+        $begin = new \DateTime();
+
+        $sut = new RevenueStatisticEvent($begin, $end);
+
+        self::assertSame($begin, $sut->getBegin());
+        self::assertSame($end, $sut->getEnd());
+        self::assertSame(0.0, $sut->getRevenue());
+
+        $sut->addRevenue(13.45);
+        $sut->addRevenue(6.55);
+        $sut->addRevenue(111);
+        $sut->addRevenue(2222.22);
+
+        self::assertSame(2353.22, $sut->getRevenue());
+    }
+}