Issue #1754254 by dawehner, damiankloip: Add a generic testcase for the pager base.

core/modules/views/tests/Drupal/views/Tests/Plugin/pager/PagerPluginBaseTest.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\views\Tests\Plugin\pager\PagerPluginBaseTest
+ */
+
+namespace Drupal\views\Tests\Plugin\pager;
+
+use Drupal\Tests\UnitTestCase;
+use Drupal\Core\Database\StatementInterface;
+
+/**
+ * Tests the PagerPluginBase class
+ *
+ * @group Views
+ *
+ * @see \Drupal\views\Plugin\views\pager\PagerPluginBase
+ */
+class PagerPluginBaseTest extends UnitTestCase {
+
+  /**
+   * The mock pager plugin instance.
+   *
+   * @var \Drupal\views\Plugin\views\pager\PagerPluginBase|\PHPUnit_Framework_MockObject_MockObject
+   */
+  protected $pager;
+
+  public static function getInfo() {
+    return array(
+      'name' => 'PagerPluginBase test',
+      'description' => 'Tests the \Drupal\views\Plugin\views\pager\PagerPluginBase class.',
+      'group' => 'Views Handlers',
+    );
+  }
+
+  public function setUp() {
+    $this->pager = $this->getMockBuilder('Drupal\views\Plugin\views\pager\PagerPluginBase')
+      ->disableOriginalConstructor()
+      ->getMockForAbstractClass();
+
+    $view = $this->getMockBuilder('Drupal\views\ViewExecutable')
+      ->disableOriginalConstructor()
+      ->getMock();
+    $display = $this->getMockBuilder('Drupal\views\Plugin\views\display\DisplayPluginBase')
+      ->disableOriginalConstructor()
+      ->getMock();
+
+    $options = array(
+      'items_per_page' => 5,
+      'offset' => 1,
+    );
+
+    $this->pager->init($view, $display, $options);
+
+    $this->pager->current_page = 1;
+  }
+
+  /**
+   * Tests the getItemsPerPage() method.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::getItemsPerPage()
+   */
+  public function testGetItemsPerPage() {
+    $this->assertEquals(5, $this->pager->getItemsPerPage());
+  }
+
+  /**
+   * Tests the setItemsPerPage() method.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::setItemsPerPage()
+   */
+  public function testSetItemsPerPage() {
+    $this->pager->setItemsPerPage(6);
+    $this->assertEquals(6, $this->pager->getItemsPerPage());
+  }
+
+  /**
+   * Tests the getOffset() method.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::getOffset()
+   */
+  public function testGetOffset() {
+    $this->assertEquals(1, $this->pager->getOffset());
+  }
+
+  /**
+   * Tests the setOffset() method.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::setOffset()
+   */
+  public function testSetOffset() {
+    $this->pager->setOffset(2);
+    $this->assertEquals(2, $this->pager->getOffset());
+  }
+
+  /**
+   * Tests the getCurrentPage() method.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::getCurrentPage()
+   */
+  public function testGetCurrentPage() {
+    $this->assertEquals(1, $this->pager->getCurrentPage());
+  }
+
+  /**
+   * Tests the setCurrentPage() method.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::setCurrentPage()
+   */
+  public function testSetCurrentPage() {
+    $this->pager->setCurrentPage(2);
+    $this->assertEquals(2, $this->pager->getCurrentPage());
+
+    // A non numeric number or number below 0 should return 0.
+    $this->pager->setCurrentPage('two');
+    $this->assertEquals(0, $this->pager->getCurrentPage());
+
+    $this->pager->setCurrentPage(-2);
+    $this->assertEquals(0, $this->pager->getCurrentPage());
+  }
+
+  /**
+   * Tests the getTotalItems() method.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::getTotalItems()
+   */
+  public function testGetTotalItems() {
+    // Should return 0 by default.
+    $this->assertEquals(0, $this->pager->getTotalItems());
+
+    $this->pager->total_items = 10;
+    $this->assertEquals(10, $this->pager->getTotalItems());
+  }
+
+  /**
+   * Tests the getPagerId() method.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::getPagerId()
+   */
+  public function testGetPagerId() {
+    // Should return 0 if 'id' is not set.
+    $this->assertEquals(0, $this->pager->getPagerId());
+
+    $this->pager->options['id'] = 1;
+
+    $this->assertEquals(1, $this->pager->getPagerId());
+  }
+
+  /**
+   * Tests the usePager() method.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::usePager()
+   */
+  public function testUsePager() {
+    $this->assertTrue($this->pager->usePager());
+  }
+
+  /**
+   * Tests the useCountQuery() method.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::useCountQuery()
+   */
+  public function testUseCountQuery() {
+    $this->assertTrue($this->pager->useCountQuery());
+  }
+
+  /**
+   * Tests the usesExposed() method.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::usedExposed()
+   */
+  public function testUsesExposed() {
+    $this->assertFalse($this->pager->usesExposed());
+  }
+
+  /**
+   * Tests the hasMoreRecords() method.
+   *
+   * @dataProvider providerTestHasMoreRecords
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::hasMoreRecords()
+   */
+  public function testHasMoreRecords($items_per_page, $total_items, $current_page, $has_more_records) {
+    $this->pager->setItemsPerPage($items_per_page);
+    $this->pager->total_items = $total_items;
+    $this->pager->setCurrentPage($current_page);
+    $this->assertEquals($has_more_records, $this->pager->hasMoreRecords());
+  }
+
+  /**
+   * Provides test data for the hasMoreRecord method test.
+   *
+   * @see self::testHasMoreRecords
+   */
+  public function providerTestHasMoreRecords() {
+    return array(
+      // No items per page, so there can't be more available records.
+      array(0, 0, 0, FALSE),
+      array(0, 10, 0, FALSE),
+      // The amount of total items equals the items per page, so there is no
+      // next page available.
+      array(5, 5, 0, FALSE),
+      // There is one more item, and we are at the first page.
+      array(5, 6, 0, TRUE),
+      // Now we are on the second page, which has just a single one left.
+      array(5, 6, 1, FALSE),
+      // Increase the total items, so we have some available on the third page.
+      array(5, 12, 1, TRUE)
+    );
+  }
+
+  /**
+   * Tests the executeCountQuery method without a set offset.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::executeCountQuery()
+   */
+  public function testExecuteCountQueryWithoutOffset() {
+    $statement = $this->getMock('\Drupal\views\Tests\Plugin\pager\TestStatementInterface');
+
+    $statement->expects($this->once())
+      ->method('fetchField')
+      ->will($this->returnValue(3));
+
+    $query = $this->getMockBuilder('\Drupal\Core\Database\Query\Select')
+      ->disableOriginalConstructor()
+      ->getMock();
+
+    $query->expects($this->once())
+      ->method('execute')
+      ->will($this->returnValue($statement));
+
+    $this->pager->setOffset(0);
+    $this->assertEquals(3, $this->pager->executeCountQuery($query));
+  }
+
+  /**
+   * Tests the executeCountQuery method with a set offset.
+   *
+   * @see \Drupal\views\Plugin\views\pager\PagerPluginBase::executeCountQuery()
+   */
+  public function testExecuteCountQueryWithOffset() {
+    $statement = $this->getMock('\Drupal\views\Tests\Plugin\pager\TestStatementInterface');
+
+    $statement->expects($this->once())
+      ->method('fetchField')
+      ->will($this->returnValue(3));
+
+    $query = $this->getMockBuilder('\Drupal\Core\Database\Query\Select')
+      ->disableOriginalConstructor()
+      ->getMock();
+
+    $query->expects($this->once())
+      ->method('execute')
+      ->will($this->returnValue($statement));
+
+    $this->pager->setOffset(2);
+    $this->assertEquals(1, $this->pager->executeCountQuery($query));
+  }
+
+}
+
+// As StatementInterface extends \Transversable, which though always needs
+// an additional interface. The Statement class itself can't be mocked because
+// of its __wakeup function.
+interface TestStatementInterface extends StatementInterface, \Iterator {}