rustqual 0.5.4

Comprehensive Rust code quality analyzer — six dimensions: Complexity, Coupling, DRY, IOSP, SRP, Test Quality
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

use crate::analyzer::{Classification, FunctionAnalysis};

/// Print results as Graphviz DOT format for call-graph visualization.
/// Operation: string formatting logic with no own function calls.
pub fn print_dot(results: &[FunctionAnalysis]) {
    // Closure to sanitize names for DOT node IDs (eliminates 2× duplication)
    let sanitize = |name: &str| -> String {
        name.replace("::", "_")
            .replace(['.', '<', '>', ','], "_")
            .replace(['(', ')'], "")
    };

    println!("digraph rustqual {{");
    println!("  rankdir=LR;");
    println!("  node [shape=box, style=filled, fontname=\"Helvetica\"];");

    for func in results {
        if func.suppressed {
            continue;
        }

        let node_id = format!("\"{}\"", sanitize(&func.qualified_name));

        let (color, fontcolor) = match &func.classification {
            Classification::Integration => ("#c8e6c9", "#1b5e20"), // green
            Classification::Operation => ("#bbdefb", "#0d47a1"),   // blue
            Classification::Trivial => ("#f5f5f5", "#9e9e9e"),     // grey
            Classification::Violation { .. } => ("#ffcdd2", "#b71c1c"), // red
        };

        println!(
            "  {node_id} [label=\"{}\", fillcolor=\"{color}\", fontcolor=\"{fontcolor}\"];",
            func.qualified_name,
        );

        // Draw edges for own calls (only available for violations)
        if let Classification::Violation { call_locations, .. } = &func.classification {
            for call in call_locations {
                let target = format!("\"{}\"", sanitize(&call.name));
                println!("  {node_id} -> {target};");
            }
        }
    }

    println!("}}");
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::analyzer::{compute_severity, CallOccurrence, LogicOccurrence};

    fn make_result(name: &str, classification: Classification) -> FunctionAnalysis {
        let severity = compute_severity(&classification);
        FunctionAnalysis {
            name: name.to_string(),
            file: "test.rs".to_string(),
            line: 1,
            classification,
            parent_type: None,
            suppressed: false,
            complexity: None,
            qualified_name: name.to_string(),
            severity,
            cognitive_warning: false,
            cyclomatic_warning: false,
            nesting_depth_warning: false,
            function_length_warning: false,
            unsafe_warning: false,
            error_handling_warning: false,
            complexity_suppressed: false,
            own_calls: vec![],
            parameter_count: 0,
            is_trait_impl: false,
            is_test: false,
            effort_score: None,
        }
    }

    #[test]
    fn test_print_dot_empty_no_panic() {
        let results: Vec<FunctionAnalysis> = vec![];
        print_dot(&results);
    }

    #[test]
    fn test_print_dot_integration_no_panic() {
        let results = vec![make_result("orchestrator", Classification::Integration)];
        print_dot(&results);
    }

    #[test]
    fn test_print_dot_violation_no_panic() {
        let results = vec![make_result(
            "bad_fn",
            Classification::Violation {
                has_logic: true,
                has_own_calls: true,
                logic_locations: vec![LogicOccurrence {
                    kind: "if".into(),
                    line: 1,
                }],
                call_locations: vec![CallOccurrence {
                    name: "helper".into(),
                    line: 2,
                }],
            },
        )];
        print_dot(&results);
    }

    #[test]
    fn test_print_dot_suppressed_skipped() {
        let mut func = make_result("suppressed", Classification::Operation);
        func.suppressed = true;
        let results = vec![func];
        print_dot(&results);
    }

    #[test]
    fn test_print_dot_all_classifications() {
        let results = vec![
            make_result("integration_fn", Classification::Integration),
            make_result("operation_fn", Classification::Operation),
            make_result("trivial_fn", Classification::Trivial),
            make_result(
                "violation_fn",
                Classification::Violation {
                    has_logic: true,
                    has_own_calls: true,
                    logic_locations: vec![LogicOccurrence {
                        kind: "for".into(),
                        line: 1,
                    }],
                    call_locations: vec![CallOccurrence {
                        name: "foo".into(),
                        line: 2,
                    }],
                },
            ),
        ];
        print_dot(&results);
    }
}