public function testPropertiesManipulation()
{
$sUT = new Schema();
$sUT->addProperty('test', new Property());
$items = $sUT->getProperties();
$this->assertSame(1, count($items));
$sUT->addProperty('test', new Property(), true);
$this->assertSame(1, count($sUT->getProperties()));
$this->assertSame(1, count($sUT->getRequired()));
$sUT->removeProperty('test');
$this->assertSame(0, count($sUT->getProperties()));
$this->assertSame(0, count($sUT->getRequired()));
$sUT->addProperty('test', new Property(), true);
$this->assertSame(1, count($sUT->getProperties()));
$this->assertSame(1, count($sUT->getRequired()));
$this->setExpectedException('JSONSchema\\Structure\\Exceptions\\OverwriteKeyException');
$sUT->addProperty('test', new Property(), false, false);
}