public function testPushPop()
{
$conf = new ConfigurationFixture();
$pushed = $conf->push('queue', 'first_val');
$this->assertTrue($pushed->hasOption('queue'));
$this->assertInternalType('array', $pushed->getOption('queue'));
$this->assertCount(1, $pushed->getOption('queue'));
$this->assertContains('first_val', $pushed->getOption('queue'));
$pushed = $pushed->push('queue', 'second_val');
$this->assertCount(2, $pushed->getOption('queue'));
$this->assertContains('first_val', $pushed->getOption('queue'));
$this->assertContains('second_val', $pushed->getOption('queue'));
$conf = new ConfigurationFixture();
$conf->preserveInstance = true;
$conf->push('queue', 'first_val');
$conf->push('queue', 'second_val');
$pop = $conf->pop('queue');
$this->assertEquals('second_val', $pop);
$pop = $conf->pop('queue');
$this->assertEquals('first_val', $pop);
$pop = $conf->pop('queue');
$this->assertNull($pop);
$conf = new ConfigurationFixture();
$extra = $conf->option('test', 'value');
$pop = $extra->pop('test');
$this->assertEquals('value', $pop);
$pop = $extra->pop('test');
$this->assertNull($pop);
$conf = new ConfigurationFixture();
$pop = $conf->pop('empty');
$this->assertNull($pop);
$conf = new ConfigurationFixture();
$conf->setConfig(['queue' => 'first_val']);
$pushed = $conf->push('queue', 'second_val', 'third_val');
$this->assertCount(3, $pushed->getOption('queue'));
$this->assertContains('first_val', $pushed->getOption('queue'));
$this->assertContains('second_val', $pushed->getOption('queue'));
$this->assertContains('third_val', $pushed->getOption('queue'));
}
