Edit: InputOptionTest.php

Editing: InputOptionTest.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\Console\Tests\Input;

use Symfony\Component\Console\Input\InputOption;

class InputOptionTest extends \PHPUnit_Framework_TestCase
{
    public function testConstructor()
    {
        $option = new InputOption('foo');
        $this->assertEquals('foo', $option->getName(), '__construct() takes a name as its first argument');
        $option = new InputOption('--foo');
        $this->assertEquals('foo', $option->getName(), '__construct() removes the leading -- of the option name');
    }

/**
     * @expectedException        \InvalidArgumentException
     * @expectedExceptionMessage Impossible to have an option mode VALUE_IS_ARRAY if the option does not accept a value.
     */
    public function testArrayModeWithoutValue()
    {
        new InputOption('foo', 'f', InputOption::VALUE_IS_ARRAY);
    }

public function testShortcut()
    {
        $option = new InputOption('foo', 'f');
        $this->assertEquals('f', $option->getShortcut(), '__construct() can take a shortcut as its second argument');
        $option = new InputOption('foo', '-f|-ff|fff');
        $this->assertEquals('f|ff|fff', $option->getShortcut(), '__construct() removes the leading - of the shortcuts');
        $option = new InputOption('foo', array('f', 'ff', '-fff'));
        $this->assertEquals('f|ff|fff', $option->getShortcut(), '__construct() removes the leading - of the shortcuts');
        $option = new InputOption('foo');
        $this->assertNull($option->getShortcut(), '__construct() makes the shortcut null by default');
    }

public function testModes()
    {
        $option = new InputOption('foo', 'f');
        $this->assertFalse($option->acceptValue(), '__construct() gives a "InputOption::VALUE_NONE" mode by default');
        $this->assertFalse($option->isValueRequired(), '__construct() gives a "InputOption::VALUE_NONE" mode by default');
        $this->assertFalse($option->isValueOptional(), '__construct() gives a "InputOption::VALUE_NONE" mode by default');

$option = new InputOption('foo', 'f', null);
        $this->assertFalse($option->acceptValue(), '__construct() can take "InputOption::VALUE_NONE" as its mode');
        $this->assertFalse($option->isValueRequired(), '__construct() can take "InputOption::VALUE_NONE" as its mode');
        $this->assertFalse($option->isValueOptional(), '__construct() can take "InputOption::VALUE_NONE" as its mode');

$option = new InputOption('foo', 'f', InputOption::VALUE_NONE);
        $this->assertFalse($option->acceptValue(), '__construct() can take "InputOption::VALUE_NONE" as its mode');
        $this->assertFalse($option->isValueRequired(), '__construct() can take "InputOption::VALUE_NONE" as its mode');
        $this->assertFalse($option->isValueOptional(), '__construct() can take "InputOption::VALUE_NONE" as its mode');

$option = new InputOption('foo', 'f', InputOption::VALUE_REQUIRED);
        $this->assertTrue($option->acceptValue(), '__construct() can take "InputOption::VALUE_REQUIRED" as its mode');
        $this->assertTrue($option->isValueRequired(), '__construct() can take "InputOption::VALUE_REQUIRED" as its mode');
        $this->assertFalse($option->isValueOptional(), '__construct() can take "InputOption::VALUE_REQUIRED" as its mode');

$option = new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL);
        $this->assertTrue($option->acceptValue(), '__construct() can take "InputOption::VALUE_OPTIONAL" as its mode');
        $this->assertFalse($option->isValueRequired(), '__construct() can take "InputOption::VALUE_OPTIONAL" as its mode');
        $this->assertTrue($option->isValueOptional(), '__construct() can take "InputOption::VALUE_OPTIONAL" as its mode');
    }

/**
     * @dataProvider provideInvalidModes
     */
    public function testInvalidModes($mode)
    {
        $this->setExpectedException('InvalidArgumentException', sprintf('Option mode "%s" is not valid.', $mode));

new InputOption('foo', 'f', $mode);
    }

public function provideInvalidModes()
    {
        return array(
            array('ANOTHER_ONE'),
            array(-1)
        );
    }

/**
     * @expectedException \InvalidArgumentException
     */
    public function testEmptyNameIsInvalid()
    {
        new InputOption('');
    }

/**
     * @expectedException \InvalidArgumentException
     */
    public function testDoubleDashNameIsInvalid()
    {
        new InputOption('--');
    }

/**
     * @expectedException \InvalidArgumentException
     */
    public function testSingleDashOptionIsInvalid()
    {
        new InputOption('foo', '-');
    }

public function testIsArray()
    {
        $option = new InputOption('foo', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY);
        $this->assertTrue($option->isArray(), '->isArray() returns true if the option can be an array');
        $option = new InputOption('foo', null, InputOption::VALUE_NONE);
        $this->assertFalse($option->isArray(), '->isArray() returns false if the option can not be an array');
    }

public function testGetDescription()
    {
        $option = new InputOption('foo', 'f', null, 'Some description');
        $this->assertEquals('Some description', $option->getDescription(), '->getDescription() returns the description message');
    }

public function testGetDefault()
    {
        $option = new InputOption('foo', null, InputOption::VALUE_OPTIONAL, '', 'default');
        $this->assertEquals('default', $option->getDefault(), '->getDefault() returns the default value');

$option = new InputOption('foo', null, InputOption::VALUE_REQUIRED, '', 'default');
        $this->assertEquals('default', $option->getDefault(), '->getDefault() returns the default value');

$option = new InputOption('foo', null, InputOption::VALUE_REQUIRED);
        $this->assertNull($option->getDefault(), '->getDefault() returns null if no default value is configured');

$option = new InputOption('foo', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY);
        $this->assertEquals(array(), $option->getDefault(), '->getDefault() returns an empty array if option is an array');

$option = new InputOption('foo', null, InputOption::VALUE_NONE);
        $this->assertFalse($option->getDefault(), '->getDefault() returns false if the option does not take a value');
    }

public function testSetDefault()
    {
        $option = new InputOption('foo', null, InputOption::VALUE_REQUIRED, '', 'default');
        $option->setDefault(null);
        $this->assertNull($option->getDefault(), '->setDefault() can reset the default value by passing null');
        $option->setDefault('another');
        $this->assertEquals('another', $option->getDefault(), '->setDefault() changes the default value');

$option = new InputOption('foo', null, InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY);
        $option->setDefault(array(1, 2));
        $this->assertEquals(array(1, 2), $option->getDefault(), '->setDefault() changes the default value');
    }

/**
     * @expectedException        \LogicException
     * @expectedExceptionMessage Cannot set a default value when using InputOption::VALUE_NONE mode.
     */
    public function testDefaultValueWithValueNoneMode()
    {
        $option = new InputOption('foo', 'f', InputOption::VALUE_NONE);
        $option->setDefault('default');
    }

/**
     * @expectedException        \LogicException
     * @expectedExceptionMessage A default value for an array option must be an array.
     */
    public function testDefaultValueWithIsArrayMode()
    {
        $option = new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY);
        $option->setDefault('default');
    }

public function testEquals()
    {
        $option = new InputOption('foo', 'f', null, 'Some description');
        $option2 = new InputOption('foo', 'f', null, 'Alternative description');
        $this->assertTrue($option->equals($option2));

$option = new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL, 'Some description');
        $option2 = new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL, 'Some description', true);
        $this->assertFalse($option->equals($option2));

$option = new InputOption('foo', 'f', null, 'Some description');
        $option2 = new InputOption('bar', 'f', null, 'Some description');
        $this->assertFalse($option->equals($option2));

$option = new InputOption('foo', 'f', null, 'Some description');
        $option2 = new InputOption('foo', '', null, 'Some description');
        $this->assertFalse($option->equals($option2));

$option = new InputOption('foo', 'f', null, 'Some description');
        $option2 = new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL, 'Some description');
        $this->assertFalse($option->equals($option2));
    }
}