spindalis 0.4.6

A bioinformatics-focused library for numerical modeling, optimisation, and simulation written in Rust
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

#[cfg(test)]
mod tests {
    use spindalis::polynomials::PolynomialError;
    use spindalis::polynomials::{eval_simple_polynomial, parse_simple_polynomial};

    #[test]
    fn test_parse_simple_polynomial_simple() {
        let coeffs = parse_simple_polynomial("2x^2 + 3x + 4").unwrap();
        let coeffs_macro = parse_simple_polynomial!(2 x ^ 2 + 3 x + 4);
        let result = vec![
            4.0, // constant term
            3.0, // x^1 term
            2.0, // x^2 term
        ];

        assert_eq!(coeffs, result);
        assert_eq!(coeffs_macro, result);
    }

    #[test]
    fn test_parse_simple_polynomial_negative_coeffs() {
        let coeffs = parse_simple_polynomial("-2x^3 - 4x + 1").unwrap();
        let coeffs_macro = parse_simple_polynomial!(-2 x ^3 - 4 x + 1);

        let result = vec![
            1.0,  // constant term
            -4.0, // x^1 term
            0.0,  // x^2 missing → 0
            -2.0, // x^3 term
        ];
        assert_eq!(coeffs, result);
        assert_eq!(coeffs_macro, result);
    }

    #[test]
    fn test_parse_simple_polynomial_implicit_coeff() {
        let coeffs = parse_simple_polynomial("x^2 + x + 1").unwrap();
        let coeffs_macro = parse_simple_polynomial!(x ^ 2 + x + 1);

        let result = vec![1.0, 1.0, 1.0];
        assert_eq!(coeffs, result);
        assert_eq!(coeffs_macro, result);
    }

    #[test]
    fn test_parse_simple_polynomial_missing_powers() {
        let coeffs = parse_simple_polynomial("2x + 3").unwrap();
        let coeffs_macro = parse_simple_polynomial!(2 x + 3);

        let result = vec![3.0, 2.0];
        assert_eq!(coeffs, result);
        assert_eq!(coeffs_macro, result);
    }

    #[test]
    fn test_parse_simple_polynomial_multiple_terms_same_power() {
        let coeffs = parse_simple_polynomial("2x^2+3x^2").unwrap();
        let coeffs_macro = parse_simple_polynomial!(2 x^2 + 3 x^2);

        let result = vec![
            0.0, // constant missing
            0.0, // x^1 missing
            5.0, // x^2 term: 2+3
        ];
        assert_eq!(coeffs, result);
        assert_eq!(coeffs_macro, result);
    }

    #[test]
    fn test_eval_polynomial_simple() {
        let coeffs = parse_simple_polynomial("2x^2 + 3x + 4").unwrap();
        let coeffs_macro = parse_simple_polynomial!(2 x^2 + 3 x + 4);
        assert_eq!(coeffs, coeffs_macro);

        let result = eval_simple_polynomial(2.0, &coeffs);

        // 2*4 + 3*2 + 4 = 8 + 6 + 4 = 18
        assert_eq!(result, 18.0);
    }

    #[test]
    fn test_eval_polynomial_negative() {
        let coeffs = parse_simple_polynomial("-x^2 + 4x - 5").unwrap();
        let coeffs_macro = parse_simple_polynomial!(-x ^ 2 + 4 x - 5);
        assert_eq!(coeffs, coeffs_macro);

        let result = eval_simple_polynomial(3.0, &coeffs);

        // -9 + 12 - 5 = -2
        assert_eq!(result, -2.0);
    }

    #[test]
    fn test_parse_simple_polynomial_constant() {
        let result = parse_simple_polynomial("7").unwrap();
        assert_eq!(result, vec![7.0]);
    }

    #[test]
    fn test_parse_and_eval_combined() {
        let coeffs = parse_simple_polynomial("x^3 - 2x + 1").unwrap();
        let coeffs_macro = parse_simple_polynomial!(x^3 - 2 x + 1);
        assert_eq!(coeffs, coeffs_macro);

        let result_at_2 = eval_simple_polynomial(2.0, &coeffs);
        // 8 - 4 + 1 = 5
        assert_eq!(result_at_2, 5.0);

        let result_at_0 = eval_simple_polynomial(0.0, &coeffs);
        assert_eq!(result_at_0, 1.0);
    }

    #[test]
    fn test_invalid_polynomial() {
        let poly = "2x^ + 3x"; // invalid syntax
        let parsed = parse_simple_polynomial(poly);
        assert!(matches!(parsed, Err(PolynomialError::InvalidExponent)));
    }

    #[test]
    fn test_invalid_polynomial_2() {
        let poly = "x^2 + +"; // Invalid syntax
        let parsed = parse_simple_polynomial(poly);
        assert!(matches!(
            parsed,
            Err(PolynomialError::PolynomialSyntaxError)
        ));
    }

    #[test]
    fn test_invalid_polynomial_3() {
        let poly = "x^2 - -4"; // Invalid syntax
        let parsed = parse_simple_polynomial(poly);
        assert!(matches!(
            parsed,
            Err(PolynomialError::PolynomialSyntaxError)
        ));
    }
}