Implemented "no coder" coder

src/Coder/NoCoder.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PetrKnap\Binary\Coder;
+
+/**
+ * Special implementation of {@see CoderInterface} which does not code
+ */
+final class NoCoder implements CoderInterface
+{
+    public function encode(string $decoded): string
+    {
+        return $decoded;
+    }
+
+    public function decode(string $encoded): string
+    {
+        return $encoded;
+    }
+}

tests/Coder/NoCoderTest.php

@@ -0,0 +1,31 @@
+<?php declare(strict_types=1);
+
+namespace PetrKnap\Binary\Coder;
+
+use PHPUnit\Framework\Attributes\DataProvider;
+
+final class NoCoderTest extends CoderTestCase
+{
+    public static function data(): array
+    {
+        return [[self::getDecodedData()]];
+    }
+
+    #[DataProvider('data')]
+    public function testEncodes(string $data): void
+    {
+        self::assertSame(
+            $data,
+            (new NoCoder())->encode($data),
+        );
+    }
+
+    #[DataProvider('data')]
+    public function testDecodes(string $data): void
+    {
+        self::assertSame(
+            $data,
+            (new NoCoder())->decode($data),
+        );
+    }
+}