keep key and value when filtering SET arguments (#1471)

src/Command/Redis/SET.php

@@ -29,7 +29,16 @@ class SET extends RedisCommand
 
     public function setArguments(array $arguments)
     {
+        foreach ($arguments as $index => $value) {
+            if ($index < 2) {
+                continue;
+            }
+
+            if (false === $value || null === $value) {
+                unset($arguments[$index]);
+            }
+        }
+
         parent::setArguments($arguments);
-        $this->filterArguments();
     }
 }

tests/Predis/Command/Redis/SET_Test.php

@@ -188,6 +188,32 @@ class SET_Test extends PredisCommandTestCase
         );
     }
 
+    /**
+     * @group connected
+     * @requiresRedisVersion >= 2.6.12
+     */
+    public function testSetNull(): void
+    {
+        $redis = $this->getClient();
+
+        $this->assertEquals(
+            'OK', $redis->set('foo', null)
+        );
+    }
+
+    /**
+     * @group connected
+     * @requiresRedisVersion >= 2.6.12
+     */
+    public function testSetFalse(): void
+    {
+        $redis = $this->getClient();
+
+        $this->assertEquals(
+            'OK', $redis->set('foo', false)
+        );
+    }
+
     /**
      * @group connected
      * @group cluster