CacheTest.php

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<?php
namespace Magento\Framework\App\Test\Unit;

class CacheTest extends \PHPUnit\Framework\TestCase
{
    protected $_model;

    protected $_cacheTypeMocks;

    protected $_cacheFrontendMock;

    protected function setUp()
    {
        $this->_initCacheTypeMocks();

        $this->_cacheFrontendMock = $this->getMockForAbstractClass(
            \Magento\Framework\Cache\FrontendInterface::class,
            [],
            '',
            true,
            true,
            true,
            ['clean']
        );

        $frontendPoolMock = $this->createMock(\Magento\Framework\App\Cache\Frontend\Pool::class);
        $frontendPoolMock->expects($this->any())->method('valid')->will($this->onConsecutiveCalls(true, false));

        $frontendPoolMock->expects(
            $this->any()
        )->method(
            'current'
        )->will(
            $this->returnValue($this->_cacheFrontendMock)
        );
        $frontendPoolMock->expects(
            $this->any()
        )->method(
            'get'
        )->with(
            \Magento\Framework\App\Cache\Frontend\Pool::DEFAULT_FRONTEND_ID
        )->will(
            $this->returnValue($this->_cacheFrontendMock)
        );

        $this->_model = new \Magento\Framework\App\Cache($frontendPoolMock);
    }

    protected function _initCacheTypeMocks()
    {
        $cacheTypes = [
            \Magento\Framework\Cache\Frontend\Decorator\TagScope::class,
            \Magento\Framework\Cache\Frontend\Decorator\Bare::class,
        ];
        foreach ($cacheTypes as $type) {
            $this->_cacheTypeMocks[$type] = $this->getMockBuilder($type)
                ->setMethods(['clean'])
                ->setConstructorArgs(
                    [
                        $this->getMockForAbstractClass(\Magento\Framework\Cache\FrontendInterface::class), '
                        FIXTURE_TAG'
                    ]
                )
                ->getMock();
        }
    }

    public function getTypeMock($type)
    {
        return $this->_cacheTypeMocks[$type];
    }

    protected function tearDown()
    {
        $this->_cacheTypeMocks = [];
        $this->_cacheFrontendMock = null;
        $this->_model = null;
    }

    public function testConstructor()
    {
        $this->assertSame($this->_cacheFrontendMock, $this->_model->getFrontend());
    }

    public function testGetFrontend()
    {
        $frontend = $this->_model->getFrontend();
        $this->assertSame($this->_cacheFrontendMock, $frontend);
    }

    public function testLoad()
    {
        $this->_cacheFrontendMock->expects(
            $this->once()
        )->method(
            'load'
        )->with(
            'test_id'
        )->will(
            $this->returnValue('test_data')
        );
        $this->assertEquals('test_data', $this->_model->load('test_id'));
    }

    public function testSave($inputData, $inputId, $inputTags, $expectedData, $expectedId, $expectedTags)
    {
        $this->_cacheFrontendMock->expects(
            $this->once()
        )->method(
            'save'
        )->with(
            $this->identicalTo($expectedData),
            $expectedId,
            $expectedTags
        );
        $this->_model->save($inputData, $inputId, $inputTags);
    }

    public function saveDataProvider()
    {
        $configTag = \Magento\Framework\App\Config::CACHE_TAG;
        return [
            'default tags' => ['test_data', 'test_id', [], 'test_data', 'test_id', []],
            'config tags' => [
                'test_data',
                'test_id',
                [$configTag],
                'test_data',
                'test_id',
                [$configTag],
            ],
            'lowercase tags' => [
                'test_data',
                'test_id',
                ['test_tag'],
                'test_data',
                'test_id',
                ['test_tag'],
            ],
            'non-string data' => [1234567890, 'test_id', [], '1234567890', 'test_id', []]
        ];
    }

    public function testRemove($result)
    {
        $this->_cacheFrontendMock->expects(
            $this->once()
        )->method(
            'remove'
        )->with(
            'test_id'
        )->will(
            $this->returnValue($result)
        );
        $this->assertEquals($result, $this->_model->remove('test_id'));
    }

    public function successFailureDataProvider()
    {
        return ['success' => [true], 'failure' => [false]];
    }

    public function testCleanByTags()
    {
        $expectedTags = ['test_tag'];
        $this->_cacheFrontendMock->expects(
            $this->once()
        )->method(
            'clean'
        )->with(
            \Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG,
            $expectedTags
        )->will(
            $this->returnValue(true)
        );
        $this->assertTrue($this->_model->clean($expectedTags));
    }

    public function testCleanByEmptyTags()
    {
        $this->_cacheFrontendMock->expects(
            $this->once()
        )->method(
            'clean'
        )->with(
            \Zend_Cache::CLEANING_MODE_ALL
        )->will(
            $this->returnValue(true)
        );
        $this->assertTrue($this->_model->clean());
    }
}