--- /dev/null
+<?php
+
+namespace Drupal\Tests\views\Unit\Plugin\views\display;
+
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * @coversDefaultClass \Drupal\views\Plugin\views\display\Block
+ * @group block
+ */
+class BlockTest extends UnitTestCase {
+
+ /**
+ * The view executable.
+ *
+ * @var \Drupal\views\ViewExecutable|\PHPUnit_Framework_MockObject_MockObject
+ */
+ protected $executable;
+
+ /**
+ * The views block plugin.
+ *
+ * @var \Drupal\views\Plugin\Block\ViewsBlock|\PHPUnit_Framework_MockObject_MockObject
+ */
+ protected $blockPlugin;
+
+ /**
+ * The tested block display plugin.
+ *
+ * @var \Drupal\views\Plugin\views\display\Block|\PHPUnit_Framework_MockObject_MockObject
+ */
+ protected $blockDisplay;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp() {
+ parent::setUp();
+
+ $this->executable = $this->getMockBuilder('Drupal\views\ViewExecutable')
+ ->disableOriginalConstructor()
+ ->setMethods(['executeDisplay', 'setDisplay', 'setItemsPerPage'])
+ ->getMock();
+ $this->executable->expects($this->any())
+ ->method('setDisplay')
+ ->with('block_1')
+ ->will($this->returnValue(TRUE));
+
+ $this->blockDisplay = $this->executable->display_handler = $this->getMockBuilder('Drupal\views\Plugin\views\display\Block')
+ ->disableOriginalConstructor()
+ ->setMethods(NULL)
+ ->getMock();
+
+ $this->blockDisplay->view = $this->executable;
+
+ $this->blockPlugin = $this->getMockBuilder('Drupal\views\Plugin\Block\ViewsBlock')
+ ->disableOriginalConstructor()
+ ->getMock();
+ }
+
+ /**
+ * Tests the build method with no overriding.
+ */
+ public function testBuildNoOverride() {
+ $this->executable->expects($this->never())
+ ->method('setItemsPerPage');
+
+ $this->blockPlugin->expects($this->once())
+ ->method('getConfiguration')
+ ->will($this->returnValue(['items_per_page' => 'none']));
+
+ $this->blockDisplay->preBlockBuild($this->blockPlugin);
+ }
+
+ /**
+ * Tests the build method with overriding items per page.
+ */
+ public function testBuildOverride() {
+ $this->executable->expects($this->once())
+ ->method('setItemsPerPage')
+ ->with(5);
+
+ $this->blockPlugin->expects($this->once())
+ ->method('getConfiguration')
+ ->will($this->returnValue(['items_per_page' => 5]));
+
+ $this->blockDisplay->preBlockBuild($this->blockPlugin);
+ }
+
+}