✨ Add spy function

tests/FunctionsTest.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Danjones000\Test\Spy;
+
+use Danjones000\Spy\ObjectProxy;
+
+use function Danjones000\Spy\spy;
+
+class FunctionsTest extends TestCase
+{
+    public function testSpy(): void
+    {
+        $spy = spy(Fixtures\Example::class);
+        $this->assertInstanceOf(ObjectProxy::class, $spy);
+    }
+}