diff options
Diffstat (limited to 'rand/rand_xorshift/tests')
-rw-r--r-- | rand/rand_xorshift/tests/mod.rs | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/rand/rand_xorshift/tests/mod.rs b/rand/rand_xorshift/tests/mod.rs deleted file mode 100644 index 7ecdeae..0000000 --- a/rand/rand_xorshift/tests/mod.rs +++ /dev/null @@ -1,89 +0,0 @@ -use rand_core::{RngCore, SeedableRng}; -use rand_xorshift::XorShiftRng; - -#[test] -fn test_xorshift_construction() { - // Test that various construction techniques produce a working RNG. - let seed = [1,2,3,4, 5,6,7,8, 9,10,11,12, 13,14,15,16]; - let mut rng1 = XorShiftRng::from_seed(seed); - assert_eq!(rng1.next_u64(), 4325440999699518727); - - let mut rng2 = XorShiftRng::from_rng(&mut rng1).unwrap(); - // Yes, this makes rng2 a clone of rng1! - assert_eq!(rng1.next_u64(), 15614385950550801700); - assert_eq!(rng2.next_u64(), 15614385950550801700); -} - -#[test] -fn test_xorshift_true_values() { - let seed = [16,15,14,13, 12,11,10,9, 8,7,6,5, 4,3,2,1]; - let mut rng = XorShiftRng::from_seed(seed); - - let mut results = [0u32; 9]; - for i in results.iter_mut() { *i = rng.next_u32(); } - let expected: [u32; 9] = [ - 2081028795, 620940381, 269070770, 16943764, 854422573, 29242889, - 1550291885, 1227154591, 271695242]; - assert_eq!(results, expected); - - let mut results = [0u64; 9]; - for i in results.iter_mut() { *i = rng.next_u64(); } - let expected: [u64; 9] = [ - 9247529084182843387, 8321512596129439293, 14104136531997710878, - 6848554330849612046, 343577296533772213, 17828467390962600268, - 9847333257685787782, 7717352744383350108, 1133407547287910111]; - assert_eq!(results, expected); - - let mut results = [0u8; 32]; - rng.fill_bytes(&mut results); - let expected = [102, 57, 212, 16, 233, 130, 49, 183, - 158, 187, 44, 203, 63, 149, 45, 17, - 117, 129, 131, 160, 70, 121, 158, 155, - 224, 209, 192, 53, 10, 62, 57, 72]; - assert_eq!(results, expected); -} - -#[test] -fn test_xorshift_zero_seed() { - // Xorshift does not work with an all zero seed. - // Assert it does not panic. - let seed = [0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0]; - let mut rng = XorShiftRng::from_seed(seed); - let a = rng.next_u64(); - let b = rng.next_u64(); - assert!(a != 0); - assert!(b != a); -} - -#[test] -fn test_xorshift_clone() { - let seed = [1,2,3,4, 5,5,7,8, 8,7,6,5, 4,3,2,1]; - let mut rng1 = XorShiftRng::from_seed(seed); - let mut rng2 = rng1.clone(); - for _ in 0..16 { - assert_eq!(rng1.next_u64(), rng2.next_u64()); - } -} - -#[cfg(feature="serde1")] -#[test] -fn test_xorshift_serde() { - use bincode; - use std::io::{BufWriter, BufReader}; - - let seed = [1,2,3,4, 5,6,7,8, 9,10,11,12, 13,14,15,16]; - let mut rng = XorShiftRng::from_seed(seed); - - let buf: Vec<u8> = Vec::new(); - let mut buf = BufWriter::new(buf); - bincode::serialize_into(&mut buf, &rng).expect("Could not serialize"); - - let buf = buf.into_inner().unwrap(); - let mut read = BufReader::new(&buf[..]); - let mut deserialized: XorShiftRng = bincode::deserialize_from(&mut read) - .expect("Could not deserialize"); - - for _ in 0..16 { - assert_eq!(rng.next_u64(), deserialized.next_u64()); - } -} |