tests/PaginationTest.php

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<?php
require_once __DIR__ . '/../core/Pagination.php';

class PaginationTest {
    private $passed = 0;
    private $failed = 0;
    
    public function run() {
        echo "Running Pagination Tests...\n\n";
        
        $this->testBasicPagination();
        $this->testOffsetCalculation();
        $this->testNavigation();
        $this->testPageRange();
        $this->testEdgeCases();
        
        $this->printResults();
    }
    
    private function testBasicPagination() {
        $pagination = new Pagination(100, 10, 1);
        
        $this->assertEquals(100, $pagination->getTotal(), 'Total is correct');
        $this->assertEquals(10, $pagination->getLimit(), 'Limit is correct');
        $this->assertEquals(1, $pagination->getCurrentPage(), 'Current page is correct');
        $this->assertEquals(10, $pagination->getTotalPages(), 'Total pages is correct');
    }
    
    private function testOffsetCalculation() {
        $pagination = new Pagination(100, 10, 1);
        $this->assertEquals(0, $pagination->getOffset(), 'Offset for page 1 is 0');
        
        $pagination = new Pagination(100, 10, 2);
        $this->assertEquals(10, $pagination->getOffset(), 'Offset for page 2 is 10');
        
        $pagination = new Pagination(100, 10, 5);
        $this->assertEquals(40, $pagination->getOffset(), 'Offset for page 5 is 40');
    }
    
    private function testNavigation() {
        $pagination = new Pagination(100, 10, 1);
        $this->assertFalse($pagination->hasPrevious(), 'Page 1 has no previous');
        $this->assertTrue($pagination->hasNext(), 'Page 1 has next');
        
        $pagination = new Pagination(100, 10, 5);
        $this->assertTrue($pagination->hasPrevious(), 'Page 5 has previous');
        $this->assertTrue($pagination->hasNext(), 'Page 5 has next');
        
        $pagination = new Pagination(100, 10, 10);
        $this->assertTrue($pagination->hasPrevious(), 'Last page has previous');
        $this->assertFalse($pagination->hasNext(), 'Last page has no next');
    }
    
    private function testPageRange() {
        $pagination = new Pagination(100, 10, 5);
        $pages = $pagination->getPages(2);
        
        $this->assertTrue(in_array(3, $pages), 'Pages include 3');
        $this->assertTrue(in_array(4, $pages), 'Pages include 4');
        $this->assertTrue(in_array(5, $pages), 'Pages include 5');