split parser and add tests

tests/Demo/ParserTest.php

@@ -0,0 +1,37 @@
+<?php declare(strict_types=1);
+
+namespace Demostf\API\Test\Providers;
+
+use Demostf\API\Demo\Parser;
+use Demostf\API\Demo\RawParser;
+use Demostf\API\Test\TestCase;
+
+class ParserTest extends TestCase {
+	/** @var RawParser */
+	private $rawParser;
+
+	public function setUp() {
+		parent::setUp();
+
+		$this->rawParser = $this->getMockBuilder(RawParser::class)
+			->disableOriginalConstructor()
+			->getMock();
+
+		$this->rawParser->expects($this->any())
+			->method('parse')
+			->will($this->returnCallback(function ($path) {
+				$jsonPath = str_replace('.dem', '-raw.json', $path);
+				return json_decode(file_get_contents($jsonPath), true);
+			}));
+	}
+
+	public function testAnalyse() {
+		$parser = new Parser($this->rawParser);
+
+		$result = $parser->analyse(__DIR__ . '/../data/product.dem');
+
+		$expected = json_decode(file_get_contents(__DIR__ . '/../data/product-analyse.json'), true);
+
+		$this->assertEquals($expected, $result);
+	}
+}