respect-validation/tests/Rules/ExecutableTest.php

<?php

namespace Respect\Validation\Rules;

$GLOBALS['is_executable'] = null;

function is_executable($executable)
{
    $return = \is_executable($executable); // Running the real function
    if (null !== $GLOBALS['is_executable']) {
        $return = $GLOBALS['is_executable'];
        $GLOBALS['is_executable'] = null;
    }

    return $return;
}

/**
 * @covers Respect\Validation\Rules\Executable
 */
class ExecutableTest extends \PHPUnit_Framework_TestCase
{
    public function testValidExecutableFileShouldReturnTrue()
    {
        $GLOBALS['is_executable'] = true;

        $rule = new Executable();
        $input = '/path/of/a/valid/executable/file.txt';
        $this->assertTrue($rule->validate($input));
    }

    public function testInvalidExecutableFileShouldReturnFalse()
    {
        $GLOBALS['is_executable'] = false;

        $rule = new Executable();
        $input = '/path/of/an/invalid/executable/file.txt';
        $this->assertFalse($rule->validate($input));
    }

    public function testShouldValidateObjects()
    {
        $rule = new Executable();
        $object = $this->getMock('SplFileInfo', array('isExecutable'), array('somefile.txt'));
        $object->expects($this->once())
                ->method('isExecutable')
                ->will($this->returnValue(true));

        $this->assertTrue($rule->validate($object));
    }
}