INNER CODE UNIT · Rust

count_bits

ZenGo-X/curv · src/arithmetic/mod.rs:117

    fn count_bits() {
        let mut n = BigInt::one();
        let mut expected_bits = 1_usize;
        for _ in 0..100 {
            assert_eq!(n.bit_length(), expected_bits);
            n <<= 1;
            expected_bits += 1;
        }
    }

    #[test]
    fn test_bits() {
        let n = BigInt::from(0b1011001);
        let expectations = vec![true, false, true, true, false, false, true];

        for (i, expect) in expectations.into_iter().enumerate() {
            let i = 7 - i - 1;
            assert_eq!(n.test_bit(i), expect, "testing {} bit", i)

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