ParsesLanguageKeyListTest.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\Language\Tests\Activities;
 
use ILIAS\Language\Activities\InvalidInputException;
use ILIAS\Language\Activities\ParsesLanguageKeyList;
use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\TestCase;
 
class ParsesLanguageKeyListTest extends TestCase
{
    private function parse(mixed $value): array
    {
        $host = new class () {
            use ParsesLanguageKeyList;
 
            public function parse(mixed $value): array
            {
                return $this->toLanguageKeyList($value);
            }
        };
 
        return $host->parse($value);
    }
 
    public function testAcceptsAPlainTwoLetterLanguageKey(): void
    {
        $this->assertSame(['de'], $this->parse('de'));
    }
 
    #[DataProvider('whitespaceWrappedDeProvider')]
    public function testTrimsSurroundingWhitespaceIncludingNewlinesBeforeValidating(string $value): void
    {
        $this->assertSame(['de'], $this->parse($value));
    }
 
    public static function whitespaceWrappedDeProvider(): array
    {
        return [
            'plain spaces' => [' de '],
            'trailing newline' => ["de\n"],
            'trailing CRLF' => ["de\r\n"],
        ];
    }
 
    #[DataProvider('invalidLanguageKeysProvider')]
    public function testRejectsAMalformedLanguageKey(string $value): void
    {
        $this->expectException(InvalidInputException::class);
 
        $this->parse($value);
    }
 
    public static function invalidLanguageKeysProvider(): array
    {
        return [
            'uppercase' => ['DE'],
            'one letter' => ['d'],
            'three letters' => ['deu'],
            'contains a digit' => ['de1'],
            'contains a hyphen' => ['de-at'],
        ];
    }
 
    public function testDeduplicatesAcrossACommaSeparatedStringAndAnArray(): void
    {
        $this->assertSame(['de', 'fr'], $this->parse([' de, fr ', 'de']));
    }
 
    public function testRejectsAnEmptyValueAsAtLeastOneLanguageKeyIsRequired(): void
    {
        $this->expectException(InvalidInputException::class);
 
        $this->parse(' , ');
    }
 
    public function testRejectsANonStringNonArrayValue(): void
    {
        $this->expectException(InvalidInputException::class);
 
        $this->parse(42);
    }
 
    public function testRejectsANestedArrayValue(): void
    {
        $this->expectException(InvalidInputException::class);
 
        $this->parse(['de', ['fr']]);
    }
}