Added Trim strategy.

Author: Bilge

.travis.yml

@@ -1,8 +1,6 @@
 notifications:
   email: false
 
-sudo: false
-
 language: php
 
 php:

src/Strategy/Delegate.php

@@ -26,6 +26,6 @@ public function __invoke($data, $context = null)
 
     protected function delegate($strategy, $data, $context, $key = null)
     {
-        return $this->mapper->map($data, $strategy, $context, $key !== null ? $key : $this->key);
+        return $this->mapper->map($data, $strategy, $context, $key ?? $this->key);
     }
 }

src/Strategy/Trim.php

@@ -0,0 +1,12 @@
+<?php
+declare(strict_types=1);
+
+namespace ScriptFUSION\Mapper\Strategy;
+
+class Trim extends Delegate
+{
+    public function __invoke($data, $context = null)
+    {
+        return trim(parent::__invoke($data, $context));
+    }
+}

test/Integration/Mapper/Strategy/TrimTest.php

@@ -0,0 +1,21 @@
+<?php
+declare(strict_types=1);
+
+namespace ScriptFUSIONTest\Integration\Mapper\Strategy;
+
+use ScriptFUSION\Mapper\Mapper;
+use ScriptFUSION\Mapper\Strategy\Trim;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @see Trim
+ */
+final class TrimTest extends TestCase
+{
+    public function test(): void
+    {
+        $trim = (new Trim(' foo '))->setMapper(new Mapper());
+
+        self::assertSame('foo', $trim([]));
+    }
+}