use serde::{Deserialize, Serialize};
use serde_json::{from_value as from_json_value, json, to_value as to_json_value};

#[derive(Serialize, Deserialize, PartialEq, Debug)]
struct StringStruct {
    #[serde(
        deserialize_with = "ruma_serde::empty_string_as_none",
        serialize_with = "ruma_serde::none_as_empty_string"
    )]
    x: Option<String>,
}

#[derive(Serialize, Deserialize, PartialEq, Debug)]
struct NoneStruct {
    #[serde(skip_serializing_if = "Option::is_none")]
    x: Option<String>,
}

#[test]
fn empty_se() {
    let string = StringStruct { x: None };
    let none = NoneStruct { x: None };
    assert_eq!(to_json_value(string).unwrap(), json!({"x": ""}));
    assert_eq!(to_json_value(none).unwrap(), json!({}));
}

#[test]
fn empty_de() {
    let string = StringStruct { x: None };
    let none = NoneStruct { x: None };
    assert_eq!(from_json_value::<StringStruct>(json!({"x": ""})).unwrap(), string);
    assert_eq!(from_json_value::<NoneStruct>(json!({})).unwrap(), none);
}