/**
* This method tests the add and the get method
* of the TreeMap.
*
* @return void
*/
public function testAddAndGetAndIsEmptyAndClear()
{
// initialize a new TreeMap
$map = new TreeMap();
// check that the TreeMap is empty
$this->assertTrue($map->isEmpty());
// add a new element
$map->add(10, 'Test');
// get the element
$this->assertEquals('Test', $map->get(10));
// check that the TreeMap is not empty
$this->assertFalse($map->isEmpty());
// remove all elements
$map->clear();
// check that the TreeMap is empty
$this->assertTrue($map->isEmpty());
}
