Create BoolStringifier

Author: henriquemoody

src/Stringifiers/BoolStringifier.php

@@ -0,0 +1,53 @@
+<?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 is_bool;
+use Respect\Stringifier\Quoter;
+use Respect\Stringifier\Stringifier;
+
+/**
+ * Converts a boolean value into a string.
+ *
+ * @author Henrique Moody <[email protected]>
+ */
+final class BoolStringifier 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 $depth): ?string
+    {
+        if (!is_bool($raw)) {
+            return null;
+        }
+
+        return $this->quoter->quote($raw ? 'TRUE' : 'FALSE', $depth);
+    }
+}

tests/unit/Stringifiers/BoolStringifierTest.php

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+<?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 Respect\Stringifier\Quoter;
+use Respect\Stringifier\Stringifiers\BoolStringifier;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers \Respect\Stringifier\Stringifiers\BoolStringifier
+ *
+ * @author Henrique Moody <[email protected]>
+ */
+final class BoolStringifierTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function shouldNotConvertToStringWhenRawValueIsNotBoolean(): void
+    {
+        $raw = 1;
+        $depth = 0;
+
+        $quoterMock = $this->createMock(Quoter::class);
+        $quoterMock
+            ->expects($this->never())
+            ->method('quote');
+
+        $boolStringifier = new BoolStringifier($quoterMock);
+
+        self::assertNull($boolStringifier->stringify($raw, $depth));
+    }
+
+    /**
+     * @test
+     */
+    public function shouldConvertToStringWhenRawValueIsTrue(): void
+    {
+        $raw = true;
+        $depth = 0;
+
+        $expected = 'TRUE';
+
+        $quoterMock = $this->createMock(Quoter::class);
+        $quoterMock
+            ->expects($this->once())
+            ->method('quote')
+            ->with($expected, $depth)
+            ->willReturn($expected);
+
+        $boolStringifier = new BoolStringifier($quoterMock);
+
+        self::assertSame($expected, $boolStringifier->stringify($raw, $depth));
+    }
+
+    /**
+     * @test
+     */
+    public function shouldConvertToStringWhenRawValueIsFalse(): void
+    {
+        $raw = false;
+        $depth = 0;
+
+        $expected = 'FALSE';
+
+        $quoterMock = $this->createMock(Quoter::class);
+        $quoterMock
+            ->expects($this->once())
+            ->method('quote')
+            ->with($expected, $depth)
+            ->willReturn($expected);
+
+        $boolStringifier = new BoolStringifier($quoterMock);
+
+        self::assertSame($expected, $boolStringifier->stringify($raw, $depth));
+    }
+}