[t:DCWIbRRX] upgraded phpunit and added first test case

Author: nabilacoutinho

Test/XlsxWriterTest.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Test;
+
+
+use PHPUnit\Framework\TestCase;
+
+class XlsxWriterTest extends TestCase {
+
+	public function testFileProperties() {
+		$expected_author = "John Doe";
+		$writer = new \XLSXWriter();
+		$writer->setAuthor($expected_author);
+
+		$xlsx_properties = $writer->getFileProperties();
+
+		$this->assertEquals($expected_author, $xlsx_properties["author"]);
+	}
+
+}

composer.json

@@ -10,6 +10,6 @@
         "classmap": ["xlsxwriter.class.php"]
     },
     "require-dev": {
-        "phpunit/phpunit": "4.3.*"
+        "phpunit/phpunit": "^7.5"
     }
 }