ckb-fixed-hash-core 1.1.2

Provide several fixed-length binary data, aka fixed-sized hashes
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150

use crate::{H160, H256, H512, H520, error::FromStrError};
use std::str::FromStr;

macro_rules! test_from_trimmed_str_one_byte {
    ($name:ident, $trimmed_str:expr, $index:expr, $value:expr) => {
        let result = $name::from_trimmed_str($trimmed_str).unwrap();
        let mut expected = $name::default();
        expected.0[$index] = $value;
        assert_eq!(result, expected);
    };
}

#[test]
fn from_trimmed_str() {
    test_from_trimmed_str_one_byte!(H160, "1", 19, 1);
    test_from_trimmed_str_one_byte!(H256, "1", 31, 1);
    test_from_trimmed_str_one_byte!(H512, "1", 63, 1);
    test_from_trimmed_str_one_byte!(H520, "1", 64, 1);
    test_from_trimmed_str_one_byte!(H160, "10", 19, 16);
    test_from_trimmed_str_one_byte!(H256, "10", 31, 16);
    test_from_trimmed_str_one_byte!(H512, "10", 63, 16);
    test_from_trimmed_str_one_byte!(H520, "10", 64, 16);
    test_from_trimmed_str_one_byte!(H160, "100", 18, 1);
    test_from_trimmed_str_one_byte!(H256, "100", 30, 1);
    test_from_trimmed_str_one_byte!(H512, "100", 62, 1);
    test_from_trimmed_str_one_byte!(H520, "100", 63, 1);
}

macro_rules! test_from_str_via_trimmed_str {
    ($name:ident, $trimmed_str:expr, $full_str:expr) => {
        let expected = $name::from_trimmed_str($trimmed_str).unwrap();
        let result = $name::from_str($full_str).unwrap();
        assert_eq!(result, expected);
    };
}

#[test]
fn from_str() {
    {
        let full_str = "0000000000000000000000000000000000000001";
        test_from_str_via_trimmed_str!(H160, "1", full_str);
    }
    {
        let full_str = "0000000000000000000000000000000000000000000000000000000000000001";
        test_from_str_via_trimmed_str!(H256, "1", full_str);
    }
    {
        let full_str = "0000000000000000000000000000000000000000000000000000000000000000\
                        0000000000000000000000000000000000000000000000000000000000000001";
        test_from_str_via_trimmed_str!(H512, "1", full_str);
    }
    {
        let full_str = "0000000000000000000000000000000000000000000000000000000000000000\
                        0000000000000000000000000000000000000000000000000000000000000000\
                        01";
        test_from_str_via_trimmed_str!(H520, "1", full_str);
    }
    {
        let full_str = "1000000000000000000000000000000000000001";
        test_from_str_via_trimmed_str!(H160, full_str, full_str);
    }
    {
        let full_str = "1000000000000000000000000000000000000000000000000000000000000001";
        test_from_str_via_trimmed_str!(H256, full_str, full_str);
    }
    {
        let full_str = "1000000000000000000000000000000000000000000000000000000000000000\
                        0000000000000000000000000000000000000000000000000000000000000001";
        test_from_str_via_trimmed_str!(H512, full_str, full_str);
    }
    {
        let full_str = "1000000000000000000000000000000000000000000000000000000000000000\
                        0000000000000000000000000000000000000000000000000000000000000000\
                        01";
        test_from_str_via_trimmed_str!(H520, full_str, full_str);
    }
}

macro_rules! add_tests {
    ($test_name:ident, $type:ident, $bytes_size:literal) => {
        #[test]
        fn $test_name() {
            let zeros = $type([0; $bytes_size]);
            let zeros_str = format!("{:0>width$}", 0, width = $bytes_size * 2);
            let short_str = format!("{:0>width$}", 0, width = $bytes_size * 2 - 1);
            let long_str = format!("{:0>width$}", 0, width = $bytes_size * 2 + 1);
            let has_invalid_char_str = format!("x{:0>width$}", 0, width = $bytes_size * 2 - 1);
            {
                let from_zeros = $type::from_str(&zeros_str).unwrap();
                assert_eq!(zeros, from_zeros);
            }
            {
                let expected = FromStrError::InvalidLength(1);
                let actual = $type::from_str("0").unwrap_err();
                assert_eq!(expected, actual);

                let expected = FromStrError::InvalidLength($bytes_size * 2 - 1);
                let actual = $type::from_str(&short_str).unwrap_err();
                assert_eq!(expected, actual);

                let expected = FromStrError::InvalidLength($bytes_size * 2 + 1);
                let actual = $type::from_str(&long_str).unwrap_err();
                assert_eq!(expected, actual);

                let expected = FromStrError::InvalidCharacter { chr: b'x', idx: 0 };
                let actual = $type::from_str(&has_invalid_char_str).unwrap_err();
                assert_eq!(expected, actual);
            }
            {
                let from_empty = $type::from_trimmed_str("0").unwrap();
                assert_eq!(zeros, from_empty);

                let from_zero = $type::from_trimmed_str("").unwrap();
                assert_eq!(zeros, from_zero);
            }
            {
                let expected = FromStrError::InvalidLength($bytes_size * 2 + 1);
                let actual = $type::from_trimmed_str(&long_str).unwrap_err();
                assert_eq!(expected, actual);

                let expected = FromStrError::InvalidCharacter { chr: b'0', idx: 0 };
                let actual = $type::from_trimmed_str(&short_str).unwrap_err();
                assert_eq!(expected, actual);

                let expected = FromStrError::InvalidCharacter { chr: b'_', idx: 8 };
                let actual = $type::from_trimmed_str("12345678_90abcdef").unwrap_err();
                assert_eq!(expected, actual);
            }
            {
                let only_lowest_bit_is_one_str =
                    format!("{:0>width$}{}", 0, 0b0001, width = $bytes_size * 2 - 1);
                let from_full = $type::from_str(&only_lowest_bit_is_one_str).unwrap();
                let from_trimmed = $type::from_trimmed_str("1").unwrap();
                assert_eq!(from_full, from_trimmed);
            }
            {
                let only_highest_bit_is_one_str =
                    format!("{}{:0>width$}", 0b1000, 0, width = $bytes_size * 2 - 1);
                let from_full = $type::from_str(&only_highest_bit_is_one_str).unwrap();
                let from_trimmed = $type::from_trimmed_str(&only_highest_bit_is_one_str).unwrap();
                assert_eq!(from_full, from_trimmed);
            }
        }
    };
}

add_tests!(test_h160, H160, 20);
add_tests!(test_h256, H256, 32);
add_tests!(test_h512, H512, 64);
add_tests!(test_h520, H520, 65);