init: 初始化项目

tests/Example/GreetingTest.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Example;
+
+use PHPUnit\Framework\TestCase;
+use Example\Greeting;
+
+class GreetingTest extends TestCase
+{
+    public function testItGreetsUser(): void
+    {
+        $greeting = new Greeting('Rasmus Lerdorf');
+
+        $this->assertSame('Hello Rasmus Lerdorf', $greeting->sayHello());
+    }
+}