ThemeModularTest.php

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<?php
namespace Magento\Framework\View\Test\Unit\File\Collector;

use Magento\Framework\Component\ComponentRegistrar;
use Magento\Framework\View\File\Collector\ThemeModular;
use Magento\Framework\Filesystem\Directory\Read;
use Magento\Framework\View\File\Factory;

class ThemeModularTest extends \PHPUnit\Framework\TestCase
{
    private $model;

    private $themeDirectory;

    private $fileFactory;

    protected $pathPatternHelperMock;

    private $readDirFactory;

    private $componentRegistrar;

    protected function setUp()
    {
        $this->themeDirectory = $this->createPartialMock(
            \Magento\Framework\Filesystem\Directory\Read::class,
            ['getAbsolutePath', 'search']
        );
        $this->pathPatternHelperMock = $this->getMockBuilder(\Magento\Framework\View\Helper\PathPattern::class)
            ->disableOriginalConstructor()
            ->getMock();
        $this->fileFactory = $this->createMock(\Magento\Framework\View\File\Factory::class);
        $this->readDirFactory = $this->createMock(\Magento\Framework\Filesystem\Directory\ReadFactory::class);
        $this->readDirFactory->expects($this->any())
            ->method('create')
            ->will($this->returnValue($this->themeDirectory));
        $this->componentRegistrar = $this->getMockForAbstractClass(
            \Magento\Framework\Component\ComponentRegistrarInterface::class
        );
        $this->model = new \Magento\Framework\View\File\Collector\ThemeModular(
            $this->fileFactory,
            $this->readDirFactory,
            $this->componentRegistrar,
            $this->pathPatternHelperMock,
            'subdir'
        );
    }

    public function testGetFilesWrongTheme()
    {
        $this->componentRegistrar->expects($this->once())
            ->method('getPath')
            ->will($this->returnValue(''));
        $theme = $this->getMockForAbstractClass(\Magento\Framework\View\Design\ThemeInterface::class);
        $theme->expects($this->once())
            ->method('getFullPath')
            ->will($this->returnValue('area/Vendor/theme'));
        $this->assertSame([], $this->model->getFiles($theme, ''));
    }

    public function testGetFiles($files, $filePath, $pathPattern)
    {
        $theme = $this->getMockForAbstractClass(\Magento\Framework\View\Design\ThemeInterface::class);
        $themePath = 'area/theme/path';
        $theme->expects($this->once())->method('getFullPath')->willReturn($themePath);

        $handlePath = 'design/area/theme/path/%s/subdir/%s';
        $returnKeys = [];
        foreach ($files as $file) {
            $returnKeys[] = sprintf($handlePath, $file['module'], $file['handle']);
        }

        $this->componentRegistrar->expects($this->once())
            ->method('getPath')
            ->with(ComponentRegistrar::THEME, $themePath)
            ->will($this->returnValue('/full/theme/path'));
        $this->pathPatternHelperMock->expects($this->any())
            ->method('translatePatternFromGlob')
            ->with($filePath)
            ->willReturn($pathPattern);
        $this->themeDirectory->expects($this->once())
            ->method('search')
            ->willReturn($returnKeys);
        $this->themeDirectory->expects($this->any())
            ->method('getAbsolutePath')
            ->willReturnArgument(0);

        $checkResult = [];
        foreach ($files as $key => $file) {
            $checkResult[$key] = new \Magento\Framework\View\File($file['handle'], $file['module'], $theme);
            $checkResult[$key] = $this->createMock(\Magento\Framework\View\File::class);
            $this->fileFactory
                ->expects($this->at($key))
                ->method('create')
                ->with(sprintf($handlePath, $file['module'], $file['handle']), $file['module'], $theme)
                ->willReturn($checkResult[$key]);
        }
        $this->assertSame($checkResult, $this->model->getFiles($theme, $filePath));
    }

    public function getFilesDataProvider()
    {
        return [
            [
                [
                    ['handle' => '1.xml', 'module' => 'Module_One'],
                    ['handle' => '2.xml', 'module' => 'Module_One'],
                    ['handle' => '3.xml', 'module' => 'Module_Two'],
                ],
                '*.xml',
                '[^/]*\\.xml'
            ],
            [
                [
                    ['handle' => 'preset/4', 'module' => 'Module_Fourth'],
                ],
                'preset/4',
                'preset/4'
            ],
        ];
    }
}