BaseStringUtilsTest.php

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<?php
namespace Magento\Framework\Data\Argument\Interpreter;

use Magento\Framework\Phrase\RendererInterface;
use Magento\Framework\Stdlib\BooleanUtils;

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

    private $booleanUtils;

    protected function setUp()
    {
        $this->booleanUtils = $this->createPartialMock(BooleanUtils::class, ['toBoolean']);
        $this->booleanUtils->expects(
            $this->any()
        )->method(
            'toBoolean'
        )->will(
            $this->returnValueMap([['true', true], ['false', false]])
        );
        $this->model = new BaseStringUtils($this->booleanUtils);
        $translateRenderer = $this->getMockBuilder(RendererInterface::class)
          ->setMethods(['render'])
          ->getMockForAbstractClass();
        $translateRenderer->expects(self::never())->method('render');
        \Magento\Framework\Phrase::setRenderer($translateRenderer);
    }

    public function testEvaluate($input, $expected)
    {
        $actual = $this->model->evaluate($input);
        $this->assertSame($expected, (string)$actual);
    }

    public function evaluateDataProvider()
    {
        return [
            'no value' => [[], ''],
            'with value' => [['value' => 'some value'], 'some value'],
            'translation required' => [
                ['value' => 'some value', 'translate' => 'true'],
                'some value',
            ],
            'translation not required' => [['value' => 'some value', 'translate' => 'false'], 'some value'],
        ];
    }

    public function testEvaluateException($input)
    {
        $this->model->evaluate($input);
    }

    public function evaluateExceptionDataProvider()
    {
        return ['not a string' => [['value' => 123]]];
    }
}