/** 
  * @covers WindowsAzure\Common\Internal\Atom\Source::getExtensionElement
  * @covers WindowsAzure\Common\Internal\Atom\Source::setExtensionElement
  */
 public function testGetSetExtensionElement()
 {
     // Setup
     $expected = 'testExtensionElement';
     $source = new Source();
     // Test
     $source->setExtensionElement($expected);
     $actual = $source->getExtensionElement();
     // Assert
     $this->assertEquals($expected, $actual);
 }