Code works on rust playground but not in test code

Here is the code in playground: Rust Playground

Here is the code in test code:

#[cfg(test)]
mod serde_tests {
    // use super::*;
    use serde::{Deserialize, Serialize};
    use serde_json;

    #[derive(Debug, Serialize, Deserialize)]
    struct CurrencyRates {
        date: String,
        #[serde(flatten)]
        rates: Rates,
    }

    #[derive(Debug, Serialize, Deserialize)]
    #[serde(untagged)]
    enum Rates {
        Idr {
            #[serde(rename = "idr")]
            idr: CurrencyMap,
        },
        Usd {
            #[serde(rename = "usd")]
            usd: CurrencyMap,
        },
    }

    #[derive(Debug, Serialize, Deserialize)]
    #[serde(untagged)]
    enum CurrencyMap {
        Specific {
            #[serde(rename = "1inch")]
            one_inch: f64,
            aave: f64,
            ada: f64,
        },
        Partial {
            ada: f64,
        },
        Other {
            env: f64,
        },
    }

    #[test]
    fn test_serde() {
        let idr_json = r#"{
       "date": "2025-01-26",
       "idr": {
           "ada": 0.000062981114
       }
   }"#;

        let usd_json = r#"{
       "date": "2025-01-26",
       "usd": {
           "env": 0.22
       }
   }"#;

        let full_json = r#"{
       "date": "2025-01-26",
       "usd": {
           "1inch": 0.00019578941,
           "aave": 1.8799505e-7,
           "ada": 0.000062981114
       }
   }"#;

        let idr_rates: CurrencyRates = serde_json::from_str(idr_json).unwrap();
        let usd_rates: CurrencyRates = serde_json::from_str(usd_json).unwrap();
        let full_rates: CurrencyRates = serde_json::from_str(full_json).unwrap();

        println!("IDR Rates: {:?}", idr_rates);
        println!("USD Rates: {:?}", usd_rates);
        println!("Full Rates: {:?}", full_rates);

        // Serialize back to JSON
        let idr_serialized = serde_json::to_string_pretty(&idr_rates).unwrap();
        let usd_serialized = serde_json::to_string_pretty(&usd_rates).unwrap();

        println!("Serialized IDR Rates:\n{}", idr_serialized);
        println!("Serialized USD Rates:\n{}", usd_serialized);
    }
}

With error:

thread 'forex_impl::exchange_api::serde_tests::test_serde' panicked at src/forex_impl/exchange_api.rs:110:71:
called `Result::unwrap()` on an `Err` value: Error("data did not match any variant of untagged enum Rates", line: 6, column: 4)
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
test forex_impl::exchange_api::serde_tests::test_serde ... FAILED

failures:

failures:
    forex_impl::exchange_api::serde_tests::test_serde

Here is the toml:

[dependencies]
serde = { version = "1", features = ["derive"] }
serde_json = "1"

[dev-dependencies]
serde_json = "1"
serde = { version = "1", features = ["derive"] }

Cargo version:

$ cargo --version
cargo 1.83.0 (5ffbef321 2024-10-29)

Why does this erring for the exact same code?

2 posts - 2 participants

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