Commando\Test\CommandTest::testRequirementsOnOptionsValid PHP Method

    public function testRequirementsOnOptionsValid()
    {
        $tokens = array('filename', '-a', 'v1', '-b', 'v2');
        $cmd = new Command($tokens);
        $cmd->option('b');
        $cmd->option('a')->needs('b');
        $this->assertEquals($cmd['a'], 'v1');
    }