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| 1 | <?php |
| 2 | |
| 3 | // ╔════════════════════════════════════════════════════════════╗ |
| 4 | // ║ MIT Licence (#Expat) - https://opensource.org/licenses/MIT ║ |
| 5 | // ║ Copyright 2026 Frederic Poeydomenge <dyno@phexium.com> ║ |
| 6 | // ╚════════════════════════════════════════════════════════════╝ |
| 7 | |
| 8 | declare(strict_types=1); |
| 9 | |
| 10 | use Phexium\Domain\Pagination; |
| 11 | |
| 12 | pest()->group('unit'); |
| 13 | |
| 14 | describe('Total pages', function (): void { |
| 15 | it('returns correct total pages when perPage is one', function (): void { |
| 16 | $pagination = new Pagination(totalCount: 10, page: 1, perPage: 1); |
| 17 | expect($pagination->getTotalPages())->toBe(10); |
| 18 | }); |
| 19 | |
| 20 | it('computes total pages with exact division', function (): void { |
| 21 | $pagination = new Pagination(totalCount: 20, page: 1, perPage: 10); |
| 22 | |
| 23 | expect($pagination->getTotalPages())->toBe(2); |
| 24 | }); |
| 25 | |
| 26 | it('rounds up when items do not fill the last page', function (): void { |
| 27 | $pagination = new Pagination(totalCount: 21, page: 1, perPage: 10); |
| 28 | |
| 29 | expect($pagination->getTotalPages())->toBe(3); |
| 30 | }); |
| 31 | |
| 32 | it('returns one page when total equals perPage', function (): void { |
| 33 | $pagination = new Pagination(totalCount: 10, page: 1, perPage: 10); |
| 34 | |
| 35 | expect($pagination->getTotalPages())->toBe(1); |
| 36 | }); |
| 37 | |
| 38 | it('returns zero pages when there are no items', function (): void { |
| 39 | $pagination = new Pagination(totalCount: 0, page: 1, perPage: 10); |
| 40 | |
| 41 | expect($pagination->getTotalPages())->toBe(0); |
| 42 | }); |
| 43 | |
| 44 | it('returns zero pages when perPage is zero', function (): void { |
| 45 | $pagination = new Pagination(totalCount: 10, page: 1, perPage: 0); |
| 46 | |
| 47 | expect($pagination->getTotalPages())->toBe(0); |
| 48 | }); |
| 49 | }); |
| 50 | |
| 51 | describe('Navigation', function (): void { |
| 52 | it('has next page when not on the last page', function (): void { |
| 53 | $pagination = new Pagination(totalCount: 30, page: 1, perPage: 10); |
| 54 | |
| 55 | expect($pagination->hasNextPage())->toBeTrue(); |
| 56 | }); |
| 57 | |
| 58 | it('has no next page on the last page', function (): void { |
| 59 | $pagination = new Pagination(totalCount: 30, page: 3, perPage: 10); |
| 60 | |
| 61 | expect($pagination->hasNextPage())->toBeFalse(); |
| 62 | }); |
| 63 | |
| 64 | it('has no previous page on the first page', function (): void { |
| 65 | $pagination = new Pagination(totalCount: 30, page: 1, perPage: 10); |
| 66 | |
| 67 | expect($pagination->hasPreviousPage())->toBeFalse(); |
| 68 | }); |
| 69 | |
| 70 | it('has previous page when beyond the first page', function (): void { |
| 71 | $pagination = new Pagination(totalCount: 30, page: 2, perPage: 10); |
| 72 | |
| 73 | expect($pagination->hasPreviousPage())->toBeTrue(); |
| 74 | }); |
| 75 | |
| 76 | it('has no navigation on a single page', function (): void { |
| 77 | $pagination = new Pagination(totalCount: 5, page: 1, perPage: 10); |
| 78 | |
| 79 | expect($pagination->hasNextPage())->toBeFalse() |
| 80 | ->and($pagination->hasPreviousPage())->toBeFalse() |
| 81 | ; |
| 82 | }); |
| 83 | }); |
| 84 | |
| 85 | describe('Offset', function (): void { |
| 86 | it('returns zero offset for the first page', function (): void { |
| 87 | $pagination = new Pagination(totalCount: 50, page: 1, perPage: 10); |
| 88 | |
| 89 | expect($pagination->getOffset())->toBe(0); |
| 90 | }); |
| 91 | |
| 92 | it('computes offset for subsequent pages', function (): void { |
| 93 | $pagination = new Pagination(totalCount: 50, page: 3, perPage: 10); |
| 94 | |
| 95 | expect($pagination->getOffset())->toBe(20); |
| 96 | }); |
| 97 | |
| 98 | it('returns zero offset when perPage is negative', function (): void { |
| 99 | $pagination = new Pagination(totalCount: 10, page: 2, perPage: -1); |
| 100 | expect($pagination->getOffset())->toBe(0); |
| 101 | }); |
| 102 | |
| 103 | it('returns zero offset when perPage is zero', function (): void { |
| 104 | $pagination = new Pagination(totalCount: 10, page: 2, perPage: 0); |
| 105 | |
| 106 | expect($pagination->getOffset())->toBe(0); |
| 107 | }); |
| 108 | |
| 109 | it('computes offset correctly when perPage is one', function (): void { |
| 110 | $pagination = new Pagination(totalCount: 10, page: 2, perPage: 1); |
| 111 | expect($pagination->getOffset())->toBe(1); |
| 112 | }); |
| 113 | }); |