PhpFormatterTest.php

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

use Magento\Framework\App\DeploymentConfig\Writer\PhpFormatter;

class PhpFormatterTest extends \PHPUnit\Framework\TestCase
{
    public function testFormat($data, $comments, $expectedResult)
    {
        $formatter = new PhpFormatter();
        $this->assertEquals($expectedResult, $formatter->format($data, $comments));
    }

    public function formatWithCommentDataProvider()
    {
        $array = [
            'ns1' => [
                's1' => [
                    's11',
                    's12'
                ],
                's2' => [
                    's21',
                    's22'
                ],
            ],
            'ns2' => [
                's1' => [
                    's11'
                ],
            ],
            'ns3' => 'just text',
            'ns4' => 'just text'
        ];
        $comments1 = ['ns2' => 'comment for namespace 2'];
        $comments2 = [
            'ns1' => 'comment for\' namespace 1',
            'ns2' => "comment for namespace 2.\nNext comment for' namespace 2",
            'ns3' => 'comment for" namespace 3',
            'ns4' => 'comment for namespace 4',
            'ns5' => 'comment for unexisted namespace 5',
        ];
        $expectedResult1 = <<<TEXT
<?php
return [
    'ns1' => [
        's1' => [
            0 => 's11',
            1 => 's12',
        ],
        's2' => [
            0 => 's21',
            1 => 's22',
        ],
    ],
    'ns2' => [
        's1' => [
            0 => 's11',
        ],
    ],
    'ns3' => 'just text',
    'ns4' => 'just text',
];

TEXT;
        $expectedResult2 = <<<TEXT
<?php
return [
    'ns1' => [
        's1' => [
            0 => 's11',
            1 => 's12',
        ],
        's2' => [
            0 => 's21',
            1 => 's22',
        ],
    ],
    'ns2' => [
        's1' => [
            0 => 's11',
        ],
    ],
    'ns3' => 'just text',
    'ns4' => 'just text',
];

TEXT;

        $expectedResult3 = <<<TEXT
<?php
return [
    'ns1' => [
        's1' => [
            's11',
            's12'
        ],
        's2' => [
            's21',
            's22'
        ]
    ],
    'ns2' => [
        's1' => [
            's11'
        ]
    ],
    'ns3' => 'just text',
    'ns4' => 'just text'
];

TEXT;
        return [
            ['string', [], "<?php\nreturn 'string';\n"],
            ['string', ['comment'], "<?php\nreturn 'string';\n"],
            [$array, $comments1, $expectedResult1],
            [$array, $comments2, $expectedResult2],
            [$array, [], $expectedResult3],
        ];
    }
}