PoHeaderTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\Component\Gettext;

use Drupal\Component\Gettext\PoHeader;
use PHPUnit\Framework\TestCase;

/**
 * Unit tests for the Gettext PO file header handling features.
 *
 * @see Drupal\Component\Gettext\PoHeader.
 *
 * @group Gettext
 */
class PoHeaderTest extends TestCase {
    
    /**
     * Tests that plural expressions are evaluated correctly.
     *
     * Validate that the given plural expressions is evaluated with the correct
     * plural formula.
     *
     * @param string $plural
     *   The plural expression.
     * @param array $expected
     *   Array of expected plural positions keyed by plural value.
     *
     * @dataProvider providerTestPluralsFormula
     */
    public function testPluralsFormula($plural, $expected) : void {
        $p = new PoHeader();
        $parsed = $p->parsePluralForms($plural);
        [
            $nplurals,
            $new_plural,
        ] = $parsed;
        foreach ($expected as $number => $plural_form) {
            $result = $new_plural[$number] ?? $new_plural['default'];
            $this->assertEquals($result, $plural_form, 'Difference found at ' . $number . ': ' . $plural_form . ' versus ' . $result);
        }
    }
    
    /**
     * Data provider for testPluralsFormula.
     *
     * Gets pairs of plural expressions and expected plural positions keyed by
     * plural value.
     *
     * @return array
     *   Pairs of plural expressions and expected plural positions keyed by plural
     *   value.
     */
    public static function providerTestPluralsFormula() {
        return [
            [
                'nplurals=1; plural=0;',
                [
                    'default' => 0,
                ],
            ],
            [
                'nplurals=2; plural=(n > 1);',
                [
                    0 => 0,
                    1 => 0,
                    'default' => 1,
                ],
            ],
            [
                'nplurals=2; plural=(n!=1);',
                [
                    1 => 0,
                    'default' => 1,
                ],
            ],
            [
                'nplurals=2; plural=(((n==1)||((n%10)==1))?(0):1);',
                [
                    1 => 0,
                    11 => 0,
                    21 => 0,
                    31 => 0,
                    41 => 0,
                    51 => 0,
                    61 => 0,
                    71 => 0,
                    81 => 0,
                    91 => 0,
                    101 => 0,
                    111 => 0,
                    121 => 0,
                    131 => 0,
                    141 => 0,
                    151 => 0,
                    161 => 0,
                    171 => 0,
                    181 => 0,
                    191 => 0,
                    'default' => 1,
                ],
            ],
            [
                'nplurals=3; plural=((((n%10)==1)&&((n%100)!=11))?(0):(((((n%10)>=2)&&((n%10)<=4))&&(((n%100)<10)||((n%100)>=20)))?(1):2));',
                [
                    1 => 0,
                    2 => 1,
                    3 => 1,
                    4 => 1,
                    21 => 0,
                    22 => 1,
                    23 => 1,
                    24 => 1,
                    31 => 0,
                    32 => 1,
                    33 => 1,
                    34 => 1,
                    41 => 0,
                    42 => 1,
                    43 => 1,
                    44 => 1,
                    51 => 0,
                    52 => 1,
                    53 => 1,
                    54 => 1,
                    61 => 0,
                    62 => 1,
                    63 => 1,
                    64 => 1,
                    71 => 0,
                    72 => 1,
                    73 => 1,
                    74 => 1,
                    81 => 0,
                    82 => 1,
                    83 => 1,
                    84 => 1,
                    91 => 0,
                    92 => 1,
                    93 => 1,
                    94 => 1,
                    101 => 0,
                    102 => 1,
                    103 => 1,
                    104 => 1,
                    121 => 0,
                    122 => 1,
                    123 => 1,
                    124 => 1,
                    131 => 0,
                    132 => 1,
                    133 => 1,
                    134 => 1,
                    141 => 0,
                    142 => 1,
                    143 => 1,
                    144 => 1,
                    151 => 0,
                    152 => 1,
                    153 => 1,
                    154 => 1,
                    161 => 0,
                    162 => 1,
                    163 => 1,
                    164 => 1,
                    171 => 0,
                    172 => 1,
                    173 => 1,
                    174 => 1,
                    181 => 0,
                    182 => 1,
                    183 => 1,
                    184 => 1,
                    191 => 0,
                    192 => 1,
                    193 => 1,
                    194 => 1,
                    'default' => 2,
                ],
            ],
            [
                'nplurals=3; plural=((n==1)?(0):(((n>=2)&&(n<=4))?(1):2));',
                [
                    1 => 0,
                    2 => 1,
                    3 => 1,
                    4 => 1,
                    'default' => 2,
                ],
            ],
            [
                'nplurals=3; plural=((n==1)?(0):(((n==0)||(((n%100)>0)&&((n%100)<20)))?(1):2));',
                [
                    0 => 1,
                    1 => 0,
                    2 => 1,
                    3 => 1,
                    4 => 1,
                    5 => 1,
                    6 => 1,
                    7 => 1,
                    8 => 1,
                    9 => 1,
                    10 => 1,
                    11 => 1,
                    12 => 1,
                    13 => 1,
                    14 => 1,
                    15 => 1,
                    16 => 1,
                    17 => 1,
                    18 => 1,
                    19 => 1,
                    101 => 1,
                    102 => 1,
                    103 => 1,
                    104 => 1,
                    105 => 1,
                    106 => 1,
                    107 => 1,
                    108 => 1,
                    109 => 1,
                    110 => 1,
                    111 => 1,
                    112 => 1,
                    113 => 1,
                    114 => 1,
                    115 => 1,
                    116 => 1,
                    117 => 1,
                    118 => 1,
                    119 => 1,
                    'default' => 2,
                ],
            ],
            [
                'nplurals=3; plural=((n==1)?(0):(((((n%10)>=2)&&((n%10)<=4))&&(((n%100)<10)||((n%100)>=20)))?(1):2));',
                [
                    1 => 0,
                    2 => 1,
                    3 => 1,
                    4 => 1,
                    22 => 1,
                    23 => 1,
                    24 => 1,
                    32 => 1,
                    33 => 1,
                    34 => 1,
                    42 => 1,
                    43 => 1,
                    44 => 1,
                    52 => 1,
                    53 => 1,
                    54 => 1,
                    62 => 1,
                    63 => 1,
                    64 => 1,
                    72 => 1,
                    73 => 1,
                    74 => 1,
                    82 => 1,
                    83 => 1,
                    84 => 1,
                    92 => 1,
                    93 => 1,
                    94 => 1,
                    102 => 1,
                    103 => 1,
                    104 => 1,
                    122 => 1,
                    123 => 1,
                    124 => 1,
                    132 => 1,
                    133 => 1,
                    134 => 1,
                    142 => 1,
                    143 => 1,
                    144 => 1,
                    152 => 1,
                    153 => 1,
                    154 => 1,
                    162 => 1,
                    163 => 1,
                    164 => 1,
                    172 => 1,
                    173 => 1,
                    174 => 1,
                    182 => 1,
                    183 => 1,
                    184 => 1,
                    192 => 1,
                    193 => 1,
                    194 => 1,
                    'default' => 2,
                ],
            ],
            [
                'nplurals=4; plural=(((n==1)||(n==11))?(0):(((n==2)||(n==12))?(1):(((n>2)&&(n<20))?(2):3)));',
                [
                    1 => 0,
                    2 => 1,
                    3 => 2,
                    4 => 2,
                    5 => 2,
                    6 => 2,
                    7 => 2,
                    8 => 2,
                    9 => 2,
                    10 => 2,
                    11 => 0,
                    12 => 1,
                    13 => 2,
                    14 => 2,
                    15 => 2,
                    16 => 2,
                    17 => 2,
                    18 => 2,
                    19 => 2,
                    'default' => 3,
                ],
            ],
            [
                'nplurals=4; plural=(((n%100)==1)?(0):(((n%100)==2)?(1):((((n%100)==3)||((n%100)==4))?(2):3)));',
                [
                    1 => 0,
                    2 => 1,
                    3 => 2,
                    4 => 2,
                    101 => 0,
                    102 => 1,
                    103 => 2,
                    104 => 2,
                    'default' => 3,
                ],
            ],
            [
                'nplurals=5; plural=((n==1)?(0):((n==2)?(1):((n<7)?(2):((n<11)?(3):4))));',
                [
                    0 => 2,
                    1 => 0,
                    2 => 1,
                    3 => 2,
                    4 => 2,
                    5 => 2,
                    6 => 2,
                    7 => 3,
                    8 => 3,
                    9 => 3,
                    10 => 3,
                    'default' => 4,
                ],
            ],
            [
                'nplurals=6; plural=((n==1)?(0):((n==0)?(1):((n==2)?(2):((((n%100)>=3)&&((n%100)<=10))?(3):((((n%100)>=11)&&((n%100)<=99))?(4):5)))));',
                [
                    0 => 1,
                    1 => 0,
                    2 => 2,
                    3 => 3,
                    4 => 3,
                    5 => 3,
                    6 => 3,
                    7 => 3,
                    8 => 3,
                    9 => 3,
                    10 => 3,
                    100 => 5,
                    101 => 5,
                    102 => 5,
                    103 => 3,
                    104 => 3,
                    105 => 3,
                    106 => 3,
                    107 => 3,
                    108 => 3,
                    109 => 3,
                    110 => 3,
                    'default' => 4,
                ],
            ],
        ];
    }

}