Correct pack/unpack PHPDoc types, clean up UNLINK test typing (#1689)

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 ### Fixed
 - Allow `UNLINK` to accept an array of keys (#1687)
+- Fixed `Client::(un)pack()` return types
 
 ## v3.5.0 (2026-06-02)
 ### Added

src/Client.php

@@ -273,7 +273,7 @@ class Client implements ClientInterface, IteratorAggregate
      * Applies the configured serializer and compression to given value.
      *
      * @param  mixed  $value
-     * @return string
+     * @return mixed
      */
     public function pack($value)
     {
@@ -286,7 +286,7 @@ class Client implements ClientInterface, IteratorAggregate
      * Deserializes and decompresses to given value.
      *
      * @param  mixed  $value
-     * @return string
+     * @return mixed
      */
     public function unpack($value)
     {

tests/Predis/Command/Redis/UNLINK_Test.php

@@ -12,8 +12,6 @@
 
 namespace Predis\Command\Redis;
 
-use Predis\Command\PrefixableCommand;
-
 /**
  * @group commands
  * @group realm-key
@@ -78,13 +76,13 @@ class UNLINK_Test extends PredisCommandTestCase
      */
     public function testPrefixKeys(): void
     {
-        /** @var PrefixableCommand $command */
+        /** @var \Predis\Command\Redis\UNLINK $command */
         $command = $this->getCommand();
-        $actualArguments = ['arg1', 'arg2', 'arg3', 'arg4'];
+        $inputArguments = ['arg1', 'arg2', 'arg3', 'arg4'];
         $prefix = 'prefix:';
         $expectedArguments = ['prefix:arg1', 'prefix:arg2', 'prefix:arg3', 'prefix:arg4'];
 
-        $command->setArguments($actualArguments);
+        $command->setArguments($inputArguments);
         $command->prefixKeys($prefix);
 
         $this->assertSame($expectedArguments, $command->getArguments());