added annotation based exporter (#1831)

* added user exporter
* added project exporter
* added customer exporter
* added activity exporter

tests/Export/Spreadsheet/CellFormatter/AbstractFormatterTest.php

@@ -0,0 +1,64 @@
+<?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\Export\Spreadsheet\CellFormatter;
+
+use App\Export\Spreadsheet\CellFormatter\CellFormatterInterface;
+use PhpOffice\PhpSpreadsheet\Cell\Cell;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\Style;
+use PHPUnit\Framework\TestCase;
+
+abstract class AbstractFormatterTest extends TestCase
+{
+    abstract protected function getFormatter(): CellFormatterInterface;
+
+    abstract protected function getActualValue();
+
+    abstract protected function getExpectedValue();
+
+    protected function assertCellStyle(Style $style)
+    {
+    }
+
+    protected function assertCellValue(Cell $cell)
+    {
+        self::assertEquals($this->getExpectedValue(), $cell->getValue());
+    }
+
+    public function testSetFormattedValue()
+    {
+        $sut = $this->getFormatter();
+
+        $spreadsheet = new Spreadsheet();
+        $worksheet = $spreadsheet->getActiveSheet();
+
+        $sut->setFormattedValue($worksheet, 1, 1, $this->getActualValue());
+        $cell = $worksheet->getCellByColumnAndRow(1, 1, false);
+        $this->assertCellValue($cell);
+        $this->assertCellStyle($worksheet->getStyleByColumnAndRow(1, 1));
+    }
+
+    public function testSetNull()
+    {
+        $sut = $this->getFormatter();
+
+        $spreadsheet = new Spreadsheet();
+        $worksheet = $spreadsheet->getActiveSheet();
+
+        $sut->setFormattedValue($worksheet, 1, 1, null);
+        $cell = $worksheet->getCellByColumnAndRow(1, 1, false);
+        $this->assertNullValue($cell);
+    }
+
+    protected function assertNullValue(Cell $cell)
+    {
+        self::assertEquals('', $cell->getValue());
+    }
+}