debtmap 0.16.4

Code complexity and technical debt analyzer
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
151
152

use super::super::priority::TestTarget;
use super::super::RiskAnalyzer;

pub trait RiskReductionModel: Send + Sync {
    fn calculate(&self, target: &TestTarget) -> RiskReduction;
}

#[derive(Clone, Debug)]
pub struct RiskReduction {
    pub absolute: f64,
    pub percentage: f64,
    pub coverage_increase: f64,
    pub confidence: f64,
}

pub struct AdvancedRiskReductionModel {
    _risk_analyzer: RiskAnalyzer,
}

impl AdvancedRiskReductionModel {
    pub fn new(risk_analyzer: RiskAnalyzer) -> Self {
        Self {
            _risk_analyzer: risk_analyzer,
        }
    }

    fn project_coverage_increase(&self, target: &TestTarget) -> f64 {
        if target.current_coverage == 0.0 {
            match target.complexity.cyclomatic_complexity {
                0..=5 => 80.0,
                6..=10 => 70.0,
                11..=20 => 60.0,
                _ => 50.0,
            }
        } else {
            let remaining = 100.0 - target.current_coverage;
            let achievable = match target.complexity.cognitive_complexity {
                0..=10 => 0.7,
                11..=20 => 0.5,
                21..=40 => 0.3,
                _ => 0.2,
            };
            remaining * achievable
        }
    }

    fn calculate_confidence(&self, target: &TestTarget, coverage_delta: f64) -> f64 {
        let base_confidence = match target.complexity.cyclomatic_complexity {
            0..=5 => 0.95,
            6..=10 => 0.90,
            11..=20 => 0.85,
            21..=40 => 0.75,
            _ => 0.65,
        };

        let coverage_confidence = if target.current_coverage == 0.0 {
            0.95
        } else {
            0.85 - (target.current_coverage / 200.0).min(0.3)
        };

        let delta_confidence = match coverage_delta {
            d if d >= 50.0 => 0.90,
            d if d >= 30.0 => 0.85,
            d if d >= 20.0 => 0.80,
            d if d >= 10.0 => 0.75,
            _ => 0.70,
        };

        (base_confidence * coverage_confidence * delta_confidence).max(0.5_f64)
    }
}

impl AdvancedRiskReductionModel {
    // Pure function to calculate base reduction for untested code
    fn reduction_for_untested(coverage_delta: f64) -> f64 {
        match coverage_delta {
            d if d >= 60.0 => 60.0,
            d if d >= 40.0 => 50.0,
            d if d >= 20.0 => 40.0,
            _ => 30.0,
        }
    }

    // Pure function to calculate base reduction for low coverage code
    fn reduction_for_low_coverage(coverage_delta: f64) -> f64 {
        match coverage_delta {
            d if d >= 40.0 => 45.0,
            d if d >= 20.0 => 35.0,
            _ => 25.0,
        }
    }

    // Pure function to calculate base reduction for moderate coverage code
    fn reduction_for_moderate_coverage(coverage_delta: f64) -> f64 {
        match coverage_delta {
            d if d >= 30.0 => 25.0,
            d if d >= 15.0 => 20.0,
            _ => 15.0,
        }
    }

    // Pure function to calculate base reduction for high coverage code
    fn reduction_for_high_coverage(current_coverage: f64, coverage_delta: f64) -> f64 {
        let remaining_gap = 100.0 - current_coverage;
        let coverage_ratio = coverage_delta / remaining_gap.max(1.0);
        coverage_ratio * 15.0
    }

    // Pure function to get base reduction percentage
    fn get_base_reduction_percentage(current_coverage: f64, coverage_delta: f64) -> f64 {
        match current_coverage {
            0.0 => Self::reduction_for_untested(coverage_delta),
            c if c < 20.0 => Self::reduction_for_low_coverage(coverage_delta),
            c if c < 50.0 => Self::reduction_for_moderate_coverage(coverage_delta),
            c => Self::reduction_for_high_coverage(c, coverage_delta),
        }
    }

    // Pure function to get complexity multiplier
    fn get_complexity_multiplier(cyclomatic_complexity: u32) -> f64 {
        match cyclomatic_complexity {
            0..=5 => 0.9,
            6..=10 => 1.0,
            11..=20 => 1.2,
            _ => 1.4,
        }
    }
}

impl RiskReductionModel for AdvancedRiskReductionModel {
    fn calculate(&self, target: &TestTarget) -> RiskReduction {
        let coverage_delta = self.project_coverage_increase(target);

        // Use functional composition to calculate the reduction
        let base_reduction_percentage =
            Self::get_base_reduction_percentage(target.current_coverage, coverage_delta);

        let complexity_multiplier =
            Self::get_complexity_multiplier(target.complexity.cyclomatic_complexity);

        let percentage = (base_reduction_percentage * complexity_multiplier).min(85.0);
        let absolute = target.current_risk * (percentage / 100.0);

        RiskReduction {
            absolute,
            percentage,
            coverage_increase: coverage_delta,
            confidence: self.calculate_confidence(target, coverage_delta),
        }
    }
}