public function testPrependPush()
{
$cfg = new Config([]);
$cfg->prepend('prepend', 'value');
// non-existing key
$this->assertSame($cfg->get('prepend')[0], 'value');
$cfg->prepend('prepend', 'other Value');
$this->assertSame(count($cfg->get('prepend')), 2);
$this->assertSame($cfg->get('prepend')[0], 'other Value');
// push a value onto the end
$cfg->push('prepend', 'last value');
$this->assertSame(count($cfg->get('prepend')), 3);
$this->assertSame($cfg->get('prepend')[0], 'other Value');
}
