Remove duplicated code in the TestableSocket.

SourceQuery/Socket/Traits/SourcePacketDataTrait.php

@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @author Pavel Djundik
+ *
+ * @see https://xpaw.me
+ * @see https://github.com/xPaw/PHP-Source-Query
+ *
+ * @license GNU Lesser General Public License, version 2.1
+ *
+ * @internal
+ */
+
+namespace xPaw\SourceQuery\Socket\Traits;
+
+use xPaw\SourceQuery\Buffer;
+use xPaw\SourceQuery\Exception\InvalidPacketException;
+
+trait SourcePacketDataTrait
+{
+    /**
+     * @throws InvalidPacketException
+     */
+    protected function readInternalPacketData(
+        Buffer $buffer,
+        int &$count,
+        int &$number,
+        bool &$isCompressed,
+        ?int &$checksum
+    ): void {
+        $count = $buffer->getByte();
+        $number = $buffer->getByte() + 1;
+
+        if ($isCompressed) {
+            $buffer->getLong(); // Split size.
+
+            $checksum = $buffer->getUnsignedLong();
+        } else {
+            $buffer->getShort(); // Split size.
+        }
+    }
+}