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use envy;
use crate::{Data, Result};
/// Attempts to deserialize a Data struct from the environment
pub fn from_env() -> Result<Data> {
Ok(envy::from_env()?)
}
/// Attempts to deserialize a Data struct from the environment. All keys are
/// prefixed with the given prefix
pub fn from_env_prefixed(prefix: &str) -> Result<Data> {
Ok(envy::prefixed(prefix).from_env()?)
}
#[cfg(test)]
mod tests {
use super::*;
use std::{
env,
ops::FnOnce,
panic::{catch_unwind, UnwindSafe},
};
fn withenv<F: FnOnce() -> R + UnwindSafe, R>(prefix: Option<&'static str>, test: F) -> R {
env::set_var(makekey(prefix, "BASE"), "https://example.com");
env::set_var(makekey(prefix, "CLIENT_ID"), "adbc01234");
env::set_var(makekey(prefix, "CLIENT_SECRET"), "0987dcba");
env::set_var(makekey(prefix, "REDIRECT"), "urn:ietf:wg:oauth:2.0:oob");
env::set_var(makekey(prefix, "TOKEN"), "fedc5678");
let result = catch_unwind(test);
env::remove_var(makekey(prefix, "BASE"));
env::remove_var(makekey(prefix, "CLIENT_ID"));
env::remove_var(makekey(prefix, "CLIENT_SECRET"));
env::remove_var(makekey(prefix, "REDIRECT"));
env::remove_var(makekey(prefix, "TOKEN"));
fn makekey(prefix: Option<&'static str>, key: &str) -> String {
if let Some(prefix) = prefix {
format!("{}{}", prefix, key)
} else {
key.to_string()
}
}
result.expect("failed")
}
#[test]
fn test_from_env_no_prefix() {
let desered = withenv(None, from_env).expect("Couldn't deser");
assert_eq!(
desered,
Data {
base: "https://example.com".into(),
client_id: "adbc01234".into(),
client_secret: "0987dcba".into(),
redirect: "urn:ietf:wg:oauth:2.0:oob".into(),
token: "fedc5678".into(),
}
);
}
#[test]
fn test_from_env_prefixed() {
let desered = withenv(Some("APP_"), || from_env_prefixed("APP_")).expect("Couldn't deser");
assert_eq!(
desered,
Data {
base: "https://example.com".into(),
client_id: "adbc01234".into(),
client_secret: "0987dcba".into(),
redirect: "urn:ietf:wg:oauth:2.0:oob".into(),
token: "fedc5678".into(),
}
);
}
}
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