public void Serialize_Invalid_Format()
{
// arrange
var type = new FieldSetType();
// act
void Action() => type.Serialize(1);
// assert
Assert.Throws <SerializationException>(Action);
}
public void Serialize()
{
// arrange
var type = new FieldSetType();
SelectionSetNode selectionSet = Syntax.ParseSelectionSet("{ a b c d e(d: $b) }");
// act
var serialized = type.Serialize(selectionSet);
// assert
Assert.Equal("a b c d e(d: $b)", serialized);
}