CurrentTest.php

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<?php
namespace Magento\Framework\View\Test\Unit\Element\Html\Link;

class CurrentTest extends \PHPUnit\Framework\TestCase
{
    protected $_urlBuilderMock;

    protected $_requestMock;

    protected $_defaultPathMock;

    protected $_objectManager;

    protected function setUp()
    {
        $this->_objectManager = new \Magento\Framework\TestFramework\Unit\Helper\ObjectManager($this);
        $this->_urlBuilderMock = $this->createMock(\Magento\Framework\UrlInterface::class);
        $this->_requestMock = $this->createMock(\Magento\Framework\App\Request\Http::class);
        $this->_defaultPathMock = $this->createMock(\Magento\Framework\App\DefaultPathInterface::class);
    }

    public function testGetUrl()
    {
        $path = 'test/path';
        $url = 'http://example.com/asdasd';

        $this->_urlBuilderMock->expects($this->once())->method('getUrl')->with($path)->will($this->returnValue($url));

        $link = $this->_objectManager->getObject(
            \Magento\Framework\View\Element\Html\Link\Current::class,
            ['urlBuilder' => $this->_urlBuilderMock]
        );

        $link->setPath($path);
        $this->assertEquals($url, $link->getHref());
    }

    public function testIsCurrentIfIsset()
    {
        $link = $this->_objectManager->getObject(\Magento\Framework\View\Element\Html\Link\Current::class);
        $link->setCurrent(true);
        $this->assertTrue($link->isCurrent());
    }

    public function testIsCurrent()
    {
        $path = 'test/path';
        $url = 'http://example.com/a/b';

        $this->_requestMock->expects($this->once())->method('getModuleName')->will($this->returnValue('a'));
        $this->_requestMock->expects($this->once())->method('getControllerName')->will($this->returnValue('b'));
        $this->_requestMock->expects($this->once())->method('getActionName')->will($this->returnValue('d'));
        $this->_defaultPathMock->expects($this->atLeastOnce())->method('getPart')->will($this->returnValue('d'));

        $this->_urlBuilderMock->expects($this->at(0))->method('getUrl')->with($path)->will($this->returnValue($url));
        $this->_urlBuilderMock->expects($this->at(1))->method('getUrl')->with('a/b')->will($this->returnValue($url));

        $this->_requestMock->expects($this->once())->method('getControllerName')->will($this->returnValue('b'));
        $link = $this->_objectManager->getObject(
            \Magento\Framework\View\Element\Html\Link\Current::class,
            [
                'urlBuilder' => $this->_urlBuilderMock,
                'request' => $this->_requestMock,
                'defaultPath' => $this->_defaultPathMock
            ]
        );
        $link->setPath($path);
        $this->assertTrue($link->isCurrent());
    }

    public function testIsCurrentFalse()
    {
        $this->_urlBuilderMock->expects($this->at(0))->method('getUrl')->will($this->returnValue('1'));
        $this->_urlBuilderMock->expects($this->at(1))->method('getUrl')->will($this->returnValue('2'));

        $link = $this->_objectManager->getObject(
            \Magento\Framework\View\Element\Html\Link\Current::class,
            ['urlBuilder' => $this->_urlBuilderMock, 'request' => $this->_requestMock]
        );
        $this->assertFalse($link->isCurrent());
    }
}