Create ResourceStringifier

Author: henriquemoody

src/Stringifiers/ResourceStringifier.php

@@ -0,0 +1,61 @@
+<?php
+
+/*
+ * This file is part of Respect/Stringifier.
+ *
+ * (c) Henrique Moody <[email protected]>
+ *
+ * For the full copyright and license information, please view the "LICENSE.md"
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Respect\Stringifier\Stringifiers;
+
+use function get_resource_type;
+use function is_resource;
+use function sprintf;
+use Respect\Stringifier\Quoter;
+use Respect\Stringifier\Stringifier;
+
+/**
+ * Converts a resource value into a string.
+ *
+ * @author Henrique Moody <[email protected]>
+ */
+final class ResourceStringifier implements Stringifier
+{
+    /**
+     * @var Quoter
+     */
+    private $quoter;
+
+    /**
+     * Initializes the stringifier.
+     *
+     * @param Quoter $quoter
+     */
+    public function __construct(Quoter $quoter)
+    {
+        $this->quoter = $quoter;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function stringify($raw, int $depth): ?string
+    {
+        if (!is_resource($raw)) {
+            return null;
+        }
+
+        return $this->quoter->quote(
+            sprintf(
+                '[resource] (%s)',
+                get_resource_type($raw)
+            ),
+            $depth
+        );
+    }
+}

tests/unit/Stringifiers/ResourceStringifierTest.php

@@ -0,0 +1,67 @@
+<?php
+
+/*
+ * This file is part of Respect/Stringifier.
+ *
+ * (c) Henrique Moody <[email protected]>
+ *
+ * For the full copyright and license information, please view the "LICENSE.md"
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Respect\Stringifier\Test\Stringifiers;
+
+use function tmpfile;
+use Respect\Stringifier\Quoter;
+use Respect\Stringifier\Stringifiers\ResourceStringifier;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers \Respect\Stringifier\Stringifiers\ResourceStringifier
+ *
+ * @author Henrique Moody <[email protected]>
+ */
+final class ResourceStringifierTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function shouldNotConvertToStringWhenRawValueIsNotAResource(): void
+    {
+        $raw = true;
+        $depth = 0;
+
+        $quoterMock = $this->createMock(Quoter::class);
+        $quoterMock
+            ->expects($this->never())
+            ->method('quote');
+
+        $resourceStringifier = new ResourceStringifier($quoterMock);
+
+        self::assertNull($resourceStringifier->stringify($raw, $depth));
+    }
+
+    /**
+     * @test
+     */
+    public function shouldConvertToStringWhenRawValueIsNotAResource(): void
+    {
+        $raw = tmpfile();
+        $depth = 0;
+
+        $expected = '[resource] (stream)';
+
+        $quoterMock = $this->createMock(Quoter::class);
+        $quoterMock
+            ->expects($this->once())
+            ->method('quote')
+            ->with($expected, $depth)
+            ->willReturn($expected);
+
+        $resourceStringifier = new ResourceStringifier($quoterMock);
+
+        self::assertSame($expected, $resourceStringifier->stringify($raw, $depth));
+    }
+}