Unit tests for Xls Reader DataValidation

tests/PhpSpreadsheetTests/Reader/Xls/DataValidationTest.php

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+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Reader\Xls;
+
+use PhpOffice\PhpSpreadsheet\Cell\DataValidation;
+use PhpOffice\PhpSpreadsheet\Reader\Xls;
+use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
+use PHPUnit\Framework\TestCase;
+
+class DataValidationTest extends TestCase
+{
+    /**
+     * @var Worksheet
+     */
+    protected $sheet;
+
+    protected function setUp(): void
+    {
+        $filename = 'tests/data/Reader/XLS/DataValidation.xls';
+        $reader = new Xls();
+        $spreadsheet = $reader->load($filename);
+        $this->sheet = $spreadsheet->getActiveSheet();
+    }
+
+    /**
+     * @dataProvider dataValidationProvider
+     */
+    public function testDataValidation(string $expectedRange, array $expectedRule): void
+    {
+        $hasDataValidation = $this->sheet->dataValidationExists($expectedRange);
+        self::assertTrue($hasDataValidation);
+
+        $dataValidation = $this->sheet->getDataValidation($expectedRange);
+        self::assertSame($expectedRule['type'], $dataValidation->getType());
+        self::assertSame($expectedRule['operator'], $dataValidation->getOperator());
+        self::assertSame($expectedRule['formula'], $dataValidation->getFormula1());
+    }
+
+    public function dataValidationProvider(): array
+    {
+        return [
+            [
+                'B2',
+                [
+                    'type' => DataValidation::TYPE_WHOLE,
+                    'operator' => DataValidation::OPERATOR_GREATERTHANOREQUAL,
+                    'formula' => '18',
+                ],
+            ],
+            [
+                'B3',
+                [
+                    'type' => DataValidation::TYPE_LIST,
+                    'operator' => DataValidation::OPERATOR_BETWEEN,
+                    'formula' => '"Blocked,Pending,Approved"',
+                ],
+            ],
+        ];
+    }
+}