Set Up PHPUnit

Closes chandler-1.

.gitignore

@@ -5,6 +5,9 @@
 # PhpStorm
 /.idea/
 
+# PHPUnit
+/tests/cache/
+
 /chandler.yml
 
 /extensions/available/*

composer.json

@@ -1,4 +1,14 @@
 {
+    "autoload": {
+        "classmap": [
+            "chandler/Eventing/Events/Event.php"
+        ]
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Chandler\\Tests\\": "tests"
+        }
+    },
     "description": "TODO: Add a description.",
     "license": "GPL-3.0-or-later",
     "minimum-stability": "stable",
@@ -16,5 +26,9 @@
         "tracy/tracy": "^2.7",
         "symfony/translation": "^5.0",
         "symfony/yaml": "^5.3"
-    }
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^9.5"
+    },
+    "type": "project"
 }

phpunit.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<phpunit bootstrap="vendor/autoload.php" cacheResultFile="tests/cache/result.txt" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd">
+    <coverage cacheDirectory="tests/cache" processUncoveredFiles="true">
+        <include>
+            <file>chandler/Eventing/Events/Event.php</file>
+        </include>
+    </coverage>
+    <testsuites>
+        <testsuite name="All Test">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>

tests/Chandler/Eventing/Events/EventTest.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Chandler\Tests\Chandler\Eventing\Events;
+
+use Chandler\Eventing\Events\Event;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @package Chandler\Tests\Chandler\Eventing\Events
+ */
+class EventTest extends TestCase
+{
+    /**
+     * @return void
+     */
+    public function testPropertyCode(): void
+    {
+        $this->assertClassHasAttribute("code", Event::class);
+    }
+
+    /**
+     * @return void
+     */
+    public function testPropertyData(): void
+    {
+        $this->assertClassHasAttribute("data", Event::class);
+    }
+
+    /**
+     * @return void
+     */
+    public function testPropertyPristine(): void
+    {
+        $this->assertClassHasAttribute("pristine", Event::class);
+    }
+
+    /**
+     * @return void
+     */
+    public function testPropertyTime(): void
+    {
+        $this->assertClassHasAttribute("time", Event::class);
+    }
+}