public function testGetContactById()
 {
     $contact = array('Email' => '*****@*****.**', 'AudienceType' => 'B2B', 'OptInType' => 'Single', 'EmailType' => 'Html', 'Notes' => 'This is an API test contact');
     $fields = array('FIRSTNAME' => 'John', 'LASTNAME' => 'Test');
     $result = $this->object->AddContactToAddressBook($contact, $fields, $this->addressBookId);
     if ($result === FALSE) {
         $this->fail('Failed adding contact to address book.');
         return;
     }
     $contact['ID'] = $result->ID;
     $foundContact = $this->object->GetContactById($contact['ID']);
     $this->assertTrue(is_numeric($foundContact->ID));
     $this->assertEquals($contact['Email'], $foundContact->Email);
 }