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use prelude::*;
use rand;
impl Uuid {
/// Creates a random [`Uuid`].
///
/// This uses the [`rand`] crate's default task RNG as the source of random
/// numbers. If you'd like to use a custom generator, don't use this
/// method: use the `rand::Rand trait`'s `rand()` method instead.
///
/// Note that usage of this method requires the `v4` feature of this crate
/// to be enabled.
///
/// # Examples
///
/// Basic usage:
///
/// ```
/// use uuid::Uuid;
///
/// let uuid = Uuid::new_v4();
/// ```
///
/// [`rand`]: https://crates.io/crates/rand
/// [`Uuid`]: ../struct.Uuid.html
pub fn new_v4() -> Self {
use rand::RngCore;
let mut rng = rand::thread_rng();
let mut bytes = [0; 16];
rng.fill_bytes(&mut bytes);
Self::from_random_bytes(bytes)
}
}
#[cfg(test)]
mod tests {
use prelude::*;
#[test]
fn test_new() {
let uuid = Uuid::new_v4();
assert_eq!(uuid.get_version(), Some(Version::Random));
assert_eq!(uuid.get_variant(), Some(Variant::RFC4122));
}
#[test]
fn test_get_version() {
let uuid = Uuid::new_v4();
assert_eq!(uuid.get_version(), Some(Version::Random));
assert_eq!(uuid.get_version_num(), 4)
}
}