#94: added ContextVeil

src/ContextVeil.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace MaxGoryunov\SavingIterator\Src;
+
+/**
+ * Veil which applies context to origin if the condition is met.
+ */
+final class ContextVeil implements Indifferent
+{
+
+    /**
+     * Ctor.
+     * 
+     * @param mixed $origin original element.
+     */
+    public function __construct(
+        /**
+         * Original element.
+         *
+         * @var mixed
+         */
+        private mixed $origin
+    ) {
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function __call(string $name, array $arguments): mixed
+    {
+        return $this->origin->$name(...$arguments);
+    }
+}

tests/src/ContextVeilTest.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace MaxGoryunov\SavingIterator\Tests\Src;
+
+use ArrayIterator;
+use MaxGoryunov\SavingIterator\Src\ContextVeil;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @coversDefaultClass MaxGoryunov\SavingIterator\Src\ContextVeil
+ */
+final class ContextVeilTest extends TestCase
+{
+
+    /**
+     * @covers ::__construct
+     * @covers ::__call
+     * 
+     * @small
+     *
+     * @return void
+     */
+    public function testReturnsOriginMethodResults(): void
+    {
+        $origin = new ArrayIterator([23, 6, 26, 8, 4, 76, 94, 5]);
+        $veil   = new ContextVeil($origin);
+        $this->assertEquals(
+            [$origin->current(), $origin->key(), $origin->valid()],
+            [$veil->current(), $veil->key(), $veil->valid()]
+        );
+    }
+}