Create PhpParsableStringifier

Author: henriquemoody

src/Stringifiers/PhpParsableStringifier.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\Stringifiers;
+
+use function var_export;
+use Respect\Stringifier\Stringifier;
+
+/**
+ * Converts any value into PHP parsable string representation.
+ *
+ * @author Henrique Moody <[email protected]>
+ */
+final class PhpParsableStringifier implements Stringifier
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function stringify($raw, int $depth): ?string
+    {
+        $string = var_export($raw, true);
+        if (null !== $raw && 'NULL' === $string) {
+            return null;
+        }
+
+        return $string;
+    }
+}

tests/unit/Stringifiers/PhpParsableStringifierTest.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 function implode;
+use const PHP_EOL;
+use Respect\Stringifier\Stringifiers\PhpParsableStringifier;
+use PHPUnit\Framework\TestCase;
+use stdClass;
+
+/**
+ * @covers \Respect\Stringifier\Stringifiers\PhpParsableStringifier
+ *
+ * @author Henrique Moody <[email protected]>
+ */
+final class PhpParsableStringifierTest extends TestCase
+{
+    /**
+     * @test
+     *
+     * @dataProvider validValuesProvider
+     *
+     * @param mixed $raw
+     * @param string $expected
+     */
+    public function shouldConvertValueToPhpParsable($raw, string $expected): void
+    {
+        $stringifier = new PhpParsableStringifier();
+
+        self::assertSame($expected, $stringifier->stringify($raw, 0));
+    }
+
+    public function validValuesProvider(): array
+    {
+        return [
+            [true, 'true'],
+            [false, 'false'],
+            [42, '42'],
+            [1.2, '1.2'],
+            [.2, '0.2'],
+            ['string', '\'string\''],
+            [null, 'NULL'],
+            [[1], implode(PHP_EOL, ['array (', '  0 => 1,', ')'])],
+            [new stdClass(), implode(PHP_EOL, ['stdClass::__set_state(array(', '))'])],
+        ];
+    }
+
+    /**
+     * @test
+     */
+    public function shouldReturnNullWhenNotPossibleToConvert(): void
+    {
+        $stringifier = new PhpParsableStringifier();
+
+        self::assertNull($stringifier->stringify(tmpfile(), 0));
+    }
+}