<?php
namespace Xxx\Tests\Unit;

use PHPUnit\Framework\Attributes\DataProvider;
use Xxx\Tests\Support\TestCase;

// number_words() in navigation.lib.php
class NumberWordsTest extends TestCase {
  public static function numbers(): array {
    return array(
      array(0, 'zero'),
      array(1, 'one'),
      array(5, 'five'),
      array(10, 'ten'),
      array(13, 'thirteen'),
      array(19, 'nineteen'),
      array(20, 'twenty'),
      array(21, 'twenty-one'),
      array(25, 'twenty-five'),
      array(50, 'fifty'),
      array(99, 'ninety-nine'),
      array(100, 'one hundred'),
      array(101, 'one hundred and one'),
      array(105, 'one hundred and five'),
      array(110, 'one hundred and ten'),
      array(999, 'nine hundred and ninety-nine'),
      array(1000, 'one thousand'),
      array(1001, 'one thousand and one'),
      array(1099, 'one thousand and ninety-nine'),
      array(1100, 'one thousand one hundred'),
      array(12345, 'twelve thousand three hundred and forty-five'),
      array(100000, 'one hundred thousand'),
      array(1000000, 'one million'),
      array(2000300, 'two million three hundred'),
      array(1000000001, 'one billion and one'),
      array(-7, 'minus seven'),
      array(-121, 'minus one hundred and twenty-one'),
    );
  }

  #[DataProvider('numbers')]
  public function testWords(int $number, string $words): void {
    $this->assertSame($words, number_words($number));
  }

  public function testNumericStringsAreAccepted(): void {
    $this->assertSame('forty-two', number_words('42'));
  }

  // The pager shows between 1 and MAX_SHOW stories
  public function testEveryPageSizeHasWords(): void {
    for ($n = 1; $n <= MAX_SHOW; $n++)
      $this->assertMatchesRegularExpression('/^[a-z]+(-[a-z]+)?$/', number_words($n), "for $n");
  }
}