test.rs

use serde::{de::DeserializeOwned, Serialize};
use std::fmt::Debug;

/// Test that a struct `T` can be:
///
/// - parsed out of the provided JSON data
/// - serialized back to JSON
/// - parsed back from the serialized JSON of the previous step
/// - that the two parsed structs are equal according to their `PartialEq` impl
pub fn test_serialization_roundtrip<T>(json_data: &str)
where
    T: Debug + PartialEq + Serialize + DeserializeOwned,
{
    let parsed0 = serde_json::from_str::<T>(json_data);
    assert!(parsed0.is_ok());
    let parsed0 = parsed0.unwrap();

    let serialized = serde_json::to_string(&parsed0);
    assert!(serialized.is_ok());
    let serialized = serialized.unwrap();

    let parsed1 = serde_json::from_str::<T>(&serialized);
    assert!(parsed1.is_ok());
    let parsed1 = parsed1.unwrap();

    assert_eq!(parsed0, parsed1);
}