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use crate::newtypes::libcnb_newtype;
libcnb_newtype!(
layer,
/// Construct a [`LayerName`] value at compile time.
///
/// Passing a string that is not a valid `LayerName` value will yield a compilation error.
///
/// # Examples:
/// ```
/// use libcnb_data::layer::LayerName;
/// use libcnb_data::layer_name;
///
/// let layer_name: LayerName = layer_name!("foobar");
/// ```
layer_name,
/// The name of a layer.
///
/// It can contain all characters supported by the filesystem, but MUST NOT be either `build`,
/// `launch` or `store`.
///
/// Use the [`layer_name`](crate::layer_name) macro to construct a `LayerName` from a literal string. To
/// parse a dynamic string into a `LayerName`, use [`str::parse`](str::parse).
///
/// # Examples
/// ```
/// use libcnb_data::layer::LayerName;
/// use libcnb_data::layer_name;
///
/// let from_literal = layer_name!("foobar");
///
/// let input = "foobar";
/// let from_dynamic: LayerName = input.parse().unwrap();
/// assert_eq!(from_dynamic, from_literal);
///
/// let input = "build";
/// let invalid: Result<LayerName, _> = input.parse();
/// assert!(invalid.is_err());
/// ```
LayerName,
LayerNameError,
r"^(?!(build|launch|store)$).+$"
);
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn layer_name_validation_valid() {
assert!("gems".parse::<LayerName>().is_ok());
assert!("Abc 123.-_!".parse::<LayerName>().is_ok());
assert!("build-foo".parse::<LayerName>().is_ok());
assert!("foo-build".parse::<LayerName>().is_ok());
}
#[test]
fn layer_name_validation_invalid() {
assert_eq!(
"build".parse::<LayerName>(),
Err(LayerNameError::InvalidValue(String::from("build")))
);
assert_eq!(
"launch".parse::<LayerName>(),
Err(LayerNameError::InvalidValue(String::from("launch")))
);
assert_eq!(
"store".parse::<LayerName>(),
Err(LayerNameError::InvalidValue(String::from("store")))
);
assert_eq!(
"".parse::<LayerName>(),
Err(LayerNameError::InvalidValue(String::new()))
);
}
}