ContentValidatorTest.php

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<?php
namespace Magento\Downloadable\Test\Unit\Model\Sample;

use Magento\Downloadable\Model\Sample\ContentValidator;

class ContentValidatorTest extends \PHPUnit\Framework\TestCase
{
    protected $validator;

    protected $fileValidatorMock;

    protected $urlValidatorMock;

    protected $linkFileMock;

    protected $sampleFileMock;

    protected function setUp()
    {
        $this->fileValidatorMock = $this->createMock(\Magento\Downloadable\Model\File\ContentValidator::class);
        $this->urlValidatorMock = $this->createMock(\Magento\Framework\Url\Validator::class);
        $this->sampleFileMock = $this->createMock(\Magento\Downloadable\Api\Data\File\ContentInterface::class);
        $this->validator = new ContentValidator($this->fileValidatorMock, $this->urlValidatorMock);
    }

    public function testIsValid()
    {
        $sampleFileContentMock = $this->createMock(\Magento\Downloadable\Api\Data\File\ContentInterface::class);
        $sampleContentData = [
            'title' => 'Title',
            'sort_order' => 1,
            'sample_type' => 'file',
            'sample_file_content' => $sampleFileContentMock,
        ];
        $this->fileValidatorMock->expects($this->any())->method('isValid')->will($this->returnValue(true));
        $this->urlValidatorMock->expects($this->any())->method('isValid')->will($this->returnValue(true));
        $contentMock = $this->getSampleContentMock($sampleContentData);
        $this->assertTrue($this->validator->isValid($contentMock));
    }

    public function testIsValidThrowsExceptionIfSortOrderIsInvalid($sortOrder)
    {
        $sampleContentData = [
            'title' => 'Title',
            'sort_order' => $sortOrder,
            'sample_type' => 'file',
        ];
        $this->fileValidatorMock->expects($this->any())->method('isValid')->will($this->returnValue(true));
        $this->urlValidatorMock->expects($this->any())->method('isValid')->will($this->returnValue(true));
        $this->validator->isValid($this->getSampleContentMock($sampleContentData));
    }

    public function getInvalidSortOrder()
    {
        return [
            [-1],
            [1.1],
            ['string'],
        ];
    }

    protected function getSampleContentMock(array $sampleContentData)
    {
        $contentMock = $this->createMock(\Magento\Downloadable\Api\Data\SampleInterface::class);
        $contentMock->expects($this->any())->method('getTitle')->will($this->returnValue(
            $sampleContentData['title']
        ));

        $contentMock->expects($this->any())->method('getSortOrder')->will($this->returnValue(
            $sampleContentData['sort_order']
        ));
        $contentMock->expects($this->any())->method('getSampleType')->will($this->returnValue(
            $sampleContentData['sample_type']
        ));
        if (isset($sampleContentData['sample_url'])) {
            $contentMock->expects($this->any())->method('getSampleUrl')->will($this->returnValue(
                $sampleContentData['sample_url']
            ));
        }
        if (isset($sampleContentData['sample_file_content'])) {
            $contentMock->expects($this->any())->method('getSampleFileContent')
                ->willReturn($sampleContentData['sample_file_content']);
        }
        $contentMock->expects($this->any())->method('getSampleFile')->will($this->returnValue(
            $this->sampleFileMock
        ));
        return $contentMock;
    }
}