class BlockTest

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() : void {
        parent::setUp();
        $this->executable = $this->getMockBuilder('Drupal\\views\\ViewExecutable')
            ->disableOriginalConstructor()
            ->onlyMethods([
            'executeDisplay',
            'setDisplay',
            'setItemsPerPage',
        ])
            ->getMock();
        $this->executable
            ->expects($this->any())
            ->method('setDisplay')
            ->with('block_1')
            ->willReturn(TRUE);
        $this->blockDisplay = $this->executable->display_handler = $this->getMockBuilder('Drupal\\views\\Plugin\\views\\display\\Block')
            ->disableOriginalConstructor()
            ->onlyMethods([])
            ->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')
            ->willReturn([
            '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')
            ->willReturn([
            'items_per_page' => 5,
        ]);
        $this->blockDisplay
            ->preBlockBuild($this->blockPlugin);
    }

}