Allow overriding seed

src/passphrase.rs

@@ -31,7 +31,7 @@ mod test {
  use rand_chacha::{rand_core::SeedableRng, ChaCha8Rng};
  use rayon::iter::{IndexedParallelIterator, IntoParallelRefIterator, ParallelIterator};
  use statrs::distribution::{ChiSquared, ContinuousCDF};
- use std::collections::HashMap;
+ use std::{collections::HashMap, env};
 
  // This test file has W = 4 words, which can have 24 permutations
  const W: usize = 4;
@@ -45,10 +45,15 @@ mod test {
 
  let batches = std::thread::available_parallelism().unwrap();
  let words = words::list(Some("src/fixtures/test")).unwrap();
- let seed = std::time::SystemTime::now()
- .duration_since(std::time::UNIX_EPOCH)
- .unwrap()
- .as_secs();
+ let seed = env::var("TETS_SEED")
+ .map_err(|_| eyre::eyre!("TEST_SEED environment variable not set"))
+ .and_then(|s| s.parse().map_err(|_| eyre::eyre!("invalid SEED")))
+ .unwrap_or_else(|_| {
+ std::time::SystemTime::now()
+ .duration_since(std::time::UNIX_EPOCH)
+ .unwrap()
+ .as_secs()
+ });
 
  eprintln!("Available parallelism: {batches}");
  eprintln!("Number of samples: {N}");