public function testModification()
{
$field = new Field('page-a', 'key-a', 'value-a');
$field->page = 'page-b';
$field->key = 'key-b';
$field->value = 'value-b';
$field->assertEquals('page-b', $field->page);
$field->assertEquals('page-b', $field->page());
$field->assertEquals('key-b', $field->key);
$field->assertEquals('key-b', $field->key());
$field->assertEquals('value-b', $field->value);
$field->assertEquals('value-b', $field->value());
$field->assertEquals('value-b', $field->toString());
$field->assertEquals('value-b', (string) $field);
}
