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2024-08-09 22:16:39 +08:00
commit d78b38e80f
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+<?php
+
+namespace JasonGrimes\Tests;
+
+use JasonGrimes\Paginator;
+
+class PaginatorTest extends \PHPUnit_Framework_TestCase
+{
+    /** @var Paginator */
+    protected $paginator;
+
+    public function setUp()
+    {
+        $numItems = 100;
+        $itemsPerPage = 10;
+        $currentPage = 5;
+        $urlPattern = '/example/page(:num)';
+
+        $this->paginator = new Paginator($numItems, $itemsPerPage, $currentPage, $urlPattern);
+    }
+
+    public function testGetNextPage()
+    {
+        $this->paginator->setCurrentPage(1);
+        $this->assertEquals(2, $this->paginator->getNextPage());
+
+        // If we're on the last page, getNextPage() returns null.
+        $this->paginator->setCurrentPage($this->paginator->getNumPages());
+        $this->assertNull($this->paginator->getNextPage());
+    }
+
+    public function testGetPrevPage()
+    {
+        $this->paginator->setCurrentPage(2);
+        $this->assertEquals(1, $this->paginator->getPrevPage());
+
+        // If we're on the first page, getPrevPage() returns null.
+        $this->paginator->setCurrentPage(1);
+        $this->assertNull($this->paginator->getPrevPage());
+    }
+
+    public function testGetNextUrl()
+    {
+        $this->paginator->setCurrentPage(1);
+        $this->paginator->setUrlPattern('/example/page(:num)');
+        $this->assertEquals('/example/page2', $this->paginator->getNextUrl());
+
+        // Returns null if on the last page.
+        $this->paginator->setCurrentPage($this->paginator->getNumPages());
+        $this->assertNull($this->paginator->getNextUrl());
+    }
+
+    public function testGetPrevUrl()
+    {
+        $this->paginator->setCurrentPage(2);
+        $this->paginator->setUrlPattern('/example/page(:num)');
+        $this->assertEquals('/example/page1', $this->paginator->getPrevUrl());
+
+        // Returns null if on the first page.
+        $this->paginator->setCurrentPage(1);
+        $this->assertNull($this->paginator->getPrevUrl());
+    }
+
+    /**
+     * @dataProvider getTestData
+     */
+    public function testGetPages($numPages, $currentPage, $maxPages, $expected)
+    {
+        $paginator = new Paginator($numPages, 1, $currentPage);
+        $paginator->setMaxPagesToShow($maxPages);
+
+        $pages = $paginator->getPages();
+        $pageNums = array_map(function($page) { return $page['num']; }, $pages);
+
+        $this->assertEquals($expected, $pageNums);
+    }
+
+    public function getTestData()
+    {
+        return array(
+            // num pages, current page, max pages to show, expected pagination
+            array(13, 2, 5, array(1, 2, 3, 4, '...', 13)),
+            array(13, 4, 5, array(1, '...', 3, 4, 5, '...', 13)),
+            array(13, 5, 5, array(1, '...', 4, 5, 6, '...', 13)),
+            array(13, 11, 5, array(1, '...', 10, 11, 12, 13)),
+            array(13, 10, 5, array(1, '...', 9, 10, 11, '...', 13)),
+            array(20, 1, 10, array(1, 2, 3, 4, 5, 6, 7, 8, 9, '...', 20)),
+            array(20, 2, 10, array(1, 2, 3, 4, 5, 6, 7, 8, 9, '...', 20)),
+            array(20, 20, 10, array(1, '...', 12, 13, 14, 15, 16, 17, 18, 19, 20)),
+            array(20, 19, 10, array(1, '...', 12, 13, 14, 15, 16, 17, 18, 19, 20)),
+            array(20, 10, 10, array(1, '...', 7, 8, 9, 10, 11, 12, 13, 14, '...', 20)),
+            array(20, 9, 10, array(1, '...', 6, 7, 8, 9, 10, 11, 12, 13, '...', 20)),
+            array(5, 3, 10, array(1, 2, 3, 4, 5)),
+            array(1, 1, 10, array()), // No pagination if there's only one page.
+            array(20, 5, 3, array(1, '...', 5, '...', 20)),
+        );
+    }
+
+    /**
+     * @dataProvider getRangeData
+     */
+    public function testGetItemRanges($numItems, $itemsPerPage, $currentPage, $expectedFirst, $expectedLast)
+    {
+        $paginator = new Paginator($numItems, $itemsPerPage, $currentPage);
+
+        $this->assertEquals($numItems, $paginator->getTotalItems());
+        $this->assertEquals($expectedFirst, $paginator->getCurrentPageFirstItem());
+        $this->assertEquals($expectedLast, $paginator->getCurrentPageLastItem());
+
+    }
+
+    public function getRangeData()
+    {
+        return array(
+            // $numItems, $itemsPerPage, $currentPage, $expectedFirstItem, $expectedLastItem
+            array(95, 10, 1, 1, 10),
+            array(95, 10, 2, 11, 20),
+            array(95, 10, 10, 91, 95),
+            array(95, 10, 11, null, null), // If current page exceeds total items, first and last item are null.
+        );
+    }
+
+}