public function testTryGetValue()
 {
     $value = null;
     $dictionary = new Dictionary(array('a' => 1, 'b' => 2, 'c' => 3));
     $this->assertEquals(false, $dictionary->tryGetValue('d', $value));
     $this->assertEquals(null, $value);
     $this->assertEquals(true, $dictionary->tryGetValue('b', $value));
     $this->assertEquals(2, $value);
 }