add basic api tests

test/Data/DemoPlayerTest.php

@@ -0,0 +1,27 @@
+<?php declare(strict_types=1);
+
+namespace Demostf\API\Test\Data;
+
+use Demostf\API\Data\DemoPlayer;
+use Demostf\API\Test\TestCase;
+
+class DemoPlayerTest extends TestCase {
+	public function testParseSerialize() {
+		$data = [
+			'id' => 1,
+			'user_id' => 2,
+			'name' => 'foo',
+			'team' => 'red',
+			'class' => 'sniper',
+			'steamid' => 'asd',
+			'avatar' => 'asd.png',
+			'kills' => 5,
+			'assists' => 3,
+			'deaths' => 7
+		];
+
+		$demoPlayer = DemoPlayer::fromRow($data);
+
+		$this->assertEquals($data, $demoPlayer->jsonSerialize());
+	}
+}