/**
* Test recalculate.
* @covers Rentalhost\VanillaPagination\Pagination::setCurrentPage
* @covers Rentalhost\VanillaPagination\Pagination::setCurrentItem
* @covers Rentalhost\VanillaPagination\Pagination::setTotalItems
* @covers Rentalhost\VanillaPagination\Pagination::setItemsPerPage
* @covers Rentalhost\VanillaPagination\Pagination::getCurrentPageOffsets
*/
public function testRecalculate()
{
$pagination = new Pagination(200, 20);
$pagination->setCurrentPage(1);
static::assertSame(1, $pagination->getCurrentPage());
static::assertSame(200, $pagination->getTotalItems());
static::assertSame(20, $pagination->getItemsPerPage());
static::assertSame(10, $pagination->getTotalPages());
static::assertTrue($pagination->hasPages());
$pageOffsets = $pagination->getCurrentPageOffsets();
static::assertSame(1, $pageOffsets->firstItem);
static::assertSame(20, $pageOffsets->lastItem);
// Total items: 100.
$pagination->setTotalItems(100);
static::assertSame(1, $pagination->getCurrentPage());
static::assertSame(100, $pagination->getTotalItems());
static::assertSame(20, $pagination->getItemsPerPage());
static::assertSame(5, $pagination->getTotalPages());
static::assertTrue($pagination->hasPages());
$pageOffsets = $pagination->getCurrentPageOffsets();
static::assertSame(1, $pageOffsets->firstItem);
static::assertSame(20, $pageOffsets->lastItem);
// Total items: 0.
$pagination->setTotalItems(0);
static::assertSame(0, $pagination->getCurrentPage());
static::assertSame(0, $pagination->getTotalItems());
static::assertSame(20, $pagination->getItemsPerPage());
static::assertSame(0, $pagination->getTotalPages());
static::assertFalse($pagination->hasPages());
$pageOffsets = $pagination->getCurrentPageOffsets();
static::assertSame(0, $pageOffsets->firstItem);
static::assertSame(0, $pageOffsets->lastItem);
// Total items: 150.
$pagination->setTotalItems(150);
static::assertSame(1, $pagination->getCurrentPage());
static::assertSame(150, $pagination->getTotalItems());
static::assertSame(20, $pagination->getItemsPerPage());
static::assertSame(8, $pagination->getTotalPages());
static::assertTrue($pagination->hasPages());
$pageOffsets = $pagination->getCurrentPageOffsets();
static::assertSame(1, $pageOffsets->firstItem);
static::assertSame(20, $pageOffsets->lastItem);
// Items per page: 40.
$pagination->setItemsPerPage(40);
static::assertSame(1, $pagination->getCurrentPage());
static::assertSame(150, $pagination->getTotalItems());
static::assertSame(40, $pagination->getItemsPerPage());
static::assertSame(4, $pagination->getTotalPages());
static::assertTrue($pagination->hasPages());
$pageOffsets = $pagination->getCurrentPageOffsets();
static::assertSame(1, $pageOffsets->firstItem);
static::assertSame(40, $pageOffsets->lastItem);
// Current page: 5.
$pagination->setCurrentPage(5);
static::assertSame(4, $pagination->getCurrentPage());
$pageOffsets = $pagination->getCurrentPageOffsets();
static::assertSame(121, $pageOffsets->firstItem);
static::assertSame(150, $pageOffsets->lastItem);
// Items per page: 20.
$pagination->setItemsPerPage(20);
static::assertSame(7, $pagination->getCurrentPage());
$pageOffsets = $pagination->getCurrentPageOffsets();
static::assertSame(121, $pageOffsets->firstItem);
static::assertSame(140, $pageOffsets->lastItem);
// Total items: 0, Items per page: 50.
$pagination->setTotalItems(0);
$pagination->setItemsPerPage(50);
static::assertSame(0, $pagination->getCurrentPage());
$pageOffsets = $pagination->getCurrentPageOffsets();
static::assertSame(0, $pageOffsets->firstItem);
static::assertSame(0, $pageOffsets->lastItem);
}