wc-licensed-product-client/tests/Security/StringEncoderTest.php

<?php

declare(strict_types=1);

namespace Magdev\WcLicensedProductClient\Tests\Security;

use Magdev\WcLicensedProductClient\Security\StringEncoder;
use PHPUnit\Framework\Attributes\CoversClass;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\TestCase;

#[CoversClass(StringEncoder::class)]
final class StringEncoderTest extends TestCase
{
    #[Test]
    public function itEncodesAndDecodesStrings(): void
    {
        $encoder = new StringEncoder();
        $original = 'Hello, World!';

        $encoded = $encoder->encode($original);
        $decoded = $encoder->decode($encoded);

        self::assertSame($original, $decoded);
        self::assertNotSame($original, $encoded);
    }

    #[Test]
    public function itEncodesApiPaths(): void
    {
        $encoder = new StringEncoder();
        $path = '/wp-json/wc-licensed-product/v1';

        $encoded = $encoder->encode($path);
        $decoded = $encoder->decode($encoded);

        self::assertSame($path, $decoded);
        self::assertStringNotContainsString('wp-json', $encoded);
    }

    #[Test]
    public function itEncodesEndpointNames(): void
    {
        $encoder = new StringEncoder();
        $endpoints = ['validate', 'status', 'activate'];

        foreach ($endpoints as $endpoint) {
            $encoded = $encoder->encode($endpoint);
            $decoded = $encoder->decode($encoded);

            self::assertSame($endpoint, $decoded);
        }
    }

    #[Test]
    public function itHandlesEmptyString(): void
    {
        $encoder = new StringEncoder();

        $encoded = $encoder->encode('');
        $decoded = $encoder->decode($encoded);

        self::assertSame('', $decoded);
    }

    #[Test]
    public function itHandlesUnicodeStrings(): void
    {
        $encoder = new StringEncoder();
        $original = 'Ümläut and émojis 🔐';

        $encoded = $encoder->encode($original);
        $decoded = $encoder->decode($encoded);

        self::assertSame($original, $decoded);
    }

    #[Test]
    public function itProducesDifferentOutputWithDifferentKeys(): void
    {
        $encoder1 = new StringEncoder('key1');
        $encoder2 = new StringEncoder('key2');
        $original = 'test string';

        $encoded1 = $encoder1->encode($original);
        $encoded2 = $encoder2->encode($original);

        self::assertNotSame($encoded1, $encoded2);
    }

    #[Test]
    public function itRequiresSameKeyForDecoding(): void
    {
        $encoder1 = new StringEncoder('key1');
        $encoder2 = new StringEncoder('key2');
        $original = 'test string';

        $encoded = $encoder1->encode($original);
        $decodedWithWrongKey = $encoder2->decode($encoded);

        self::assertNotSame($original, $decodedWithWrongKey);
    }

    #[Test]
    public function itGeneratesEncodedConstants(): void
    {
        $encoder = new StringEncoder();
        $constants = [
            'API_PATH' => '/wp-json/wc-licensed-product/v1',
            'VALIDATE' => 'validate',
            'STATUS' => 'status',
        ];

        $encoded = $encoder->generateEncodedConstants($constants);

        self::assertCount(3, $encoded);
        self::assertArrayHasKey('API_PATH', $encoded);
        self::assertArrayHasKey('VALIDATE', $encoded);
        self::assertArrayHasKey('STATUS', $encoded);

        // Verify all can be decoded back
        foreach ($constants as $name => $value) {
            self::assertSame($value, $encoder->decode($encoded[$name]));
        }
    }

    #[Test]
    public function itThrowsOnInvalidEncodedString(): void
    {
        $encoder = new StringEncoder();

        $this->expectException(\InvalidArgumentException::class);

        $encoder->decode('not-valid-base64!!!');
    }

    #[Test]
    public function itHandlesLongStrings(): void
    {
        $encoder = new StringEncoder();
        $original = str_repeat('A', 10000);

        $encoded = $encoder->encode($original);
        $decoded = $encoder->decode($encoded);

        self::assertSame($original, $decoded);
    }
}