This crate lets you write this, with each ? equivalent to an .unwrap():

#[test]
fn user_theme_preference() -> evil::Result<()> {
    let response = make_api_call("/user/profile/settings")?;
    let json: Value = serde_json::from_str(&response)?;

    let theme = json
        .get("data")?
        .get("attributes")?
        .get("preferences")?
        .get("theme")?
        .as_str()?;

    assert_eq!(theme, "dark");
    evil::Ok(())
}

Instead of this:

#[test]
fn user_theme_preference() {
    let response = make_api_call("/user/profile/settings").unwrap();
    let json: Value = serde_json::from_str(&response).unwrap();

    let theme = json
        .get("data")
        .unwrap()
        .get("attributes")
        .unwrap()
        .get("preferences")
        .unwrap()
        .get("theme")
        .unwrap()
        .as_str()
        .unwrap();

    assert_eq!(theme, "dark");
}

GitHub:

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