From 1786dcc624c78e54c7779ca8f3f6eb959bd7bb7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E9=93=AD=E6=98=95?= <l@hyperf.io>
Date: Tue, 4 Jan 2022 11:56:53 +0800
Subject: [PATCH] Added type hint for `Debug::getRefCount()` which only support
 object. (#4429)

* Added type hint for `Debug::getRefCount()` which only support object.

* Update CHANGELOG-2.2.md
---
 src/Debug.php       |  5 ++++-
 tests/DebugTest.php | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 tests/DebugTest.php

diff --git a/src/Debug.php b/src/Debug.php
index 475fa2b..c50cfe7 100644
--- a/src/Debug.php
+++ b/src/Debug.php
@@ -13,7 +13,10 @@
 
 class Debug
 {
-    public static function getRefCount($object): string
+    /**
+     * Get object's ref count.
+     */
+    public static function getRefCount(object $object): string
     {
         ob_start();
         debug_zval_dump($object);
diff --git a/tests/DebugTest.php b/tests/DebugTest.php
new file mode 100644
index 0000000..c5c9de2
--- /dev/null
+++ b/tests/DebugTest.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * This file is part of Hyperf.
+ *
+ * @link     https://www.hyperf.io
+ * @document https://hyperf.wiki
+ * @contact  group@hyperf.io
+ * @license  https://github.com/hyperf/hyperf/blob/master/LICENSE
+ */
+namespace HyperfTest\Testing;
+
+use Hyperf\Testing\Debug;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @internal
+ * @coversNothing
+ */
+class DebugTest extends TestCase
+{
+    public function testGetRefCount()
+    {
+        $this->assertSame('1', Debug::getRefCount(new \stdClass()));
+        $obj = new \stdClass();
+        $this->assertSame('2', Debug::getRefCount($obj));
+        $obj2 = new \stdClass();
+        $obj2->obj = $obj;
+        $this->assertSame('2', Debug::getRefCount($obj2));
+        $this->assertSame('3', Debug::getRefCount($obj));
+        $fun = static function () {};
+        $this->assertSame('2', Debug::getRefCount($fun));
+        $this->assertSame('1', Debug::getRefCount(function () {}));
+    }
+}