Edit: IdentityTranslatorTest.php

Editing: IdentityTranslatorTest.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Translation\Tests;

use Symfony\Component\Translation\IdentityTranslator;

class IdentityTranslatorTest extends \PHPUnit_Framework_TestCase
{
    /**
     * @dataProvider getTransTests
     */
    public function testTrans($expected, $id, $parameters)
    {
        $translator = new IdentityTranslator();

$this->assertEquals($expected, $translator->trans($id, $parameters));
    }

/**
     * @dataProvider getTransChoiceTests
     */
    public function testTransChoiceWithExplicitLocale($expected, $id, $number, $parameters)
    {
        $translator = new IdentityTranslator();
        $translator->setLocale('en');

$this->assertEquals($expected, $translator->transChoice($id, $number, $parameters));
    }

/**
     * @dataProvider getTransChoiceTests
     */
    public function testTransChoiceWithDefaultLocale($expected, $id, $number, $parameters)
    {
        \Locale::setDefault('en');

$translator = new IdentityTranslator();

$this->assertEquals($expected, $translator->transChoice($id, $number, $parameters));
    }

public function testGetSetLocale()
    {
        $translator = new IdentityTranslator();
        $translator->setLocale('en');

$this->assertEquals('en', $translator->getLocale());
    }

public function testGetLocaleReturnsDefaultLocaleIfNotSet()
    {
        $translator = new IdentityTranslator();

\Locale::setDefault('en');
        $this->assertEquals('en', $translator->getLocale());

\Locale::setDefault('pt_BR');
        $this->assertEquals('pt_BR', $translator->getLocale());
    }

public function getTransTests()
    {
        return array(
            array('Symfony2 is great!', 'Symfony2 is great!', array()),
            array('Symfony2 is awesome!', 'Symfony2 is %what%!', array('%what%' => 'awesome')),
        );
    }

public function getTransChoiceTests()
    {
        return array(
            array('There are no apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0, array('%count%' => 0)),
            array('There is one apple', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 1, array('%count%' => 1)),
            array('There are 10 apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 10, array('%count%' => 10)),
            array('There are 0 apples', 'There is 1 apple|There are %count% apples', 0, array('%count%' => 0)),
            array('There is 1 apple', 'There is 1 apple|There are %count% apples', 1, array('%count%' => 1)),
            array('There are 10 apples', 'There is 1 apple|There are %count% apples', 10, array('%count%' => 10)),
            // custom validation messages may be coded with a fixed value
            array('There are 2 apples', 'There are 2 apples', 2, array('%count%' => 2)),
        );
    }
}