batuta 0.7.3

Sovereign AI orchestration: autonomous agents, ML serving, code analysis, and transpilation pipelines
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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406

//! Coverage-Based Hotpath Weighting
//!
//! Applies coverage data to weight findings - bugs in uncovered code paths
//! are more suspicious than bugs in well-covered code.

use std::collections::HashMap;
use std::path::{Path, PathBuf};

use super::types::{EvidenceKind, Finding, FindingEvidence};

/// Coverage index: maps (file, line) to execution count.
pub type CoverageIndex = HashMap<(PathBuf, usize), usize>;

/// Parse LCOV file into a coverage index.
pub fn parse_lcov(content: &str) -> CoverageIndex {
    let mut index = CoverageIndex::new();
    let mut current_file: Option<PathBuf> = None;

    for line in content.lines() {
        if let Some(file) = line.strip_prefix("SF:") {
            current_file = Some(PathBuf::from(file.trim()));
        } else if let Some(da) = line.strip_prefix("DA:") {
            if let Some(ref file) = current_file {
                let parts: Vec<&str> = da.split(',').collect();
                if parts.len() >= 2 {
                    if let (Ok(line_num), Ok(hits)) =
                        (parts[0].parse::<usize>(), parts[1].parse::<usize>())
                    {
                        index.insert((file.clone(), line_num), hits);
                    }
                }
            }
        } else if line == "end_of_record" {
            current_file = None;
        }
    }

    index
}

/// Load coverage index from an LCOV file.
pub fn load_coverage_index(lcov_path: &Path) -> Option<CoverageIndex> {
    let content = std::fs::read_to_string(lcov_path).ok()?;
    Some(parse_lcov(&content))
}

/// Find the best coverage file from standard locations.
pub fn find_coverage_file(project_path: &Path) -> Option<PathBuf> {
    let candidates = [
        project_path.join("lcov.info"),
        project_path.join("target/coverage/lcov.info"),
        project_path.join("coverage/lcov.info"),
        project_path.join("target/llvm-cov/lcov.info"),
    ];

    candidates.into_iter().find(|c| c.exists())
}

/// Look up coverage for a specific file and line.
///
/// Returns the execution count, or None if the line isn't in the coverage data.
pub fn lookup_coverage(index: &CoverageIndex, file: &Path, line: usize) -> Option<usize> {
    // Try exact match first
    if let Some(&hits) = index.get(&(file.to_path_buf(), line)) {
        return Some(hits);
    }

    // Try matching just the filename for relative/absolute path differences
    let file_name = file.file_name()?.to_string_lossy();
    for ((path, l), &hits) in index {
        if *l == line {
            if let Some(name) = path.file_name() {
                if name.to_string_lossy() == file_name {
                    return Some(hits);
                }
            }
        }
    }

    None
}

/// Compute coverage weight factor for a hit count.
///
/// Returns a value in [-0.5, 0.5]:
/// - Uncovered (0 hits): +0.5 (boost suspiciousness)
/// - Low coverage (1-5 hits): +0.2
/// - Medium coverage (6-20 hits): 0.0 (neutral)
/// - High coverage (>20 hits): -0.3 (reduce suspiciousness)
fn coverage_factor(hits: usize) -> f64 {
    match hits {
        0 => 0.5,
        1..=5 => 0.2,
        6..=20 => 0.0,
        _ => -0.3,
    }
}

/// Adjust suspiciousness based on coverage.
///
/// Formula: `(base * (1 + weight * coverage_factor)).clamp(0, 1)`
pub fn coverage_adjusted_suspiciousness(base: f64, hits: usize, weight: f64) -> f64 {
    let factor = coverage_factor(hits);
    (base * (1.0 + weight * factor)).clamp(0.0, 1.0)
}

/// Apply coverage weights to findings in-place.
pub fn apply_coverage_weights(findings: &mut [Finding], index: &CoverageIndex, weight: f64) {
    for finding in findings.iter_mut() {
        if let Some(hits) = lookup_coverage(index, &finding.file, finding.line) {
            let original = finding.suspiciousness;
            finding.suspiciousness = coverage_adjusted_suspiciousness(original, hits, weight);

            // Add evidence
            let coverage_desc = match hits {
                0 => "uncovered".to_string(),
                n => format!("{} hits", n),
            };
            finding.evidence.push(FindingEvidence {
                evidence_type: EvidenceKind::SbflScore,
                description: format!("Coverage: {}", coverage_desc),
                data: Some(hits.to_string()),
            });
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_parse_lcov_basic() {
        let content = r#"SF:src/lib.rs
DA:1,10
DA:2,5
DA:3,0
end_of_record
SF:src/main.rs
DA:1,1
end_of_record
"#;

        let index = parse_lcov(content);
        assert_eq!(index.len(), 4);
        assert_eq!(index.get(&(PathBuf::from("src/lib.rs"), 1)), Some(&10));
        assert_eq!(index.get(&(PathBuf::from("src/lib.rs"), 3)), Some(&0));
        assert_eq!(index.get(&(PathBuf::from("src/main.rs"), 1)), Some(&1));
    }

    #[test]
    fn test_parse_lcov_empty() {
        let index = parse_lcov("");
        assert!(index.is_empty());
    }

    #[test]
    fn test_coverage_factor() {
        assert_eq!(coverage_factor(0), 0.5); // uncovered = boost
        assert_eq!(coverage_factor(3), 0.2); // low coverage = small boost
        assert_eq!(coverage_factor(10), 0.0); // medium = neutral
        assert_eq!(coverage_factor(100), -0.3); // high = reduce
    }

    #[test]
    fn test_coverage_adjusted_suspiciousness() {
        // Uncovered code gets boosted
        let adjusted = coverage_adjusted_suspiciousness(0.5, 0, 1.0);
        assert!(adjusted > 0.5);
        assert!((adjusted - 0.75).abs() < 0.01);

        // High coverage gets reduced
        let adjusted = coverage_adjusted_suspiciousness(0.5, 100, 1.0);
        assert!(adjusted < 0.5);
        assert!((adjusted - 0.35).abs() < 0.01);

        // Neutral coverage unchanged
        let adjusted = coverage_adjusted_suspiciousness(0.5, 10, 1.0);
        assert!((adjusted - 0.5).abs() < 0.01);

        // Zero weight = no change
        let adjusted = coverage_adjusted_suspiciousness(0.5, 0, 0.0);
        assert!((adjusted - 0.5).abs() < 0.01);
    }

    #[test]
    fn test_lookup_coverage_exact() {
        let mut index = CoverageIndex::new();
        index.insert((PathBuf::from("src/lib.rs"), 10), 5);

        let result = lookup_coverage(&index, Path::new("src/lib.rs"), 10);
        assert_eq!(result, Some(5));
    }

    #[test]
    fn test_lookup_coverage_filename_match() {
        let mut index = CoverageIndex::new();
        index.insert((PathBuf::from("/full/path/to/lib.rs"), 10), 5);

        // Should match by filename even with different path
        let result = lookup_coverage(&index, Path::new("src/lib.rs"), 10);
        assert_eq!(result, Some(5));
    }

    #[test]
    fn test_lookup_coverage_not_found() {
        let index = CoverageIndex::new();
        let result = lookup_coverage(&index, Path::new("src/lib.rs"), 10);
        assert_eq!(result, None);
    }

    #[test]
    fn test_apply_coverage_weights() {
        use crate::bug_hunter::Finding;

        let mut index = CoverageIndex::new();
        index.insert((PathBuf::from("src/lib.rs"), 10), 0); // uncovered

        let mut findings =
            vec![Finding::new("F-001", "src/lib.rs", 10, "Test").with_suspiciousness(0.5)];

        apply_coverage_weights(&mut findings, &index, 1.0);

        assert!(findings[0].suspiciousness > 0.5);
        assert!(findings[0].evidence.iter().any(|e| e.description.contains("Coverage")));
    }

    // ========================================================================
    // Additional coverage tests
    // ========================================================================

    /// Test apply_coverage_weights with non-zero hit count (covers "N hits" branch)
    #[test]
    fn test_apply_coverage_weights_nonzero_hits() {
        use crate::bug_hunter::Finding;

        let mut index = CoverageIndex::new();
        index.insert((PathBuf::from("src/main.rs"), 5), 3); // low coverage: 3 hits

        let mut findings =
            vec![Finding::new("F-002", "src/main.rs", 5, "Test finding").with_suspiciousness(0.6)];

        apply_coverage_weights(&mut findings, &index, 1.0);

        // Low coverage (1-5 hits) factor = 0.2, so 0.6 * (1 + 1.0 * 0.2) = 0.72
        assert!(
            (findings[0].suspiciousness - 0.72).abs() < 0.01,
            "Expected ~0.72, got {}",
            findings[0].suspiciousness
        );
        // Evidence should say "3 hits"
        assert!(findings[0].evidence.iter().any(|e| e.description.contains("3 hits")));
    }

    /// Test apply_coverage_weights with high hit count (covers >20 hits branch)
    #[test]
    fn test_apply_coverage_weights_high_hits() {
        use crate::bug_hunter::Finding;

        let mut index = CoverageIndex::new();
        index.insert((PathBuf::from("src/lib.rs"), 20), 50); // high coverage: 50 hits

        let mut findings =
            vec![Finding::new("F-003", "src/lib.rs", 20, "Well-tested code")
                .with_suspiciousness(0.8)];

        apply_coverage_weights(&mut findings, &index, 1.0);

        // High coverage (>20 hits) factor = -0.3, so 0.8 * (1 + 1.0 * -0.3) = 0.56
        assert!(findings[0].suspiciousness < 0.8, "High coverage should reduce suspiciousness");
        assert!(findings[0].evidence.iter().any(|e| e.description.contains("50 hits")));
    }

    /// Test apply_coverage_weights with no matching coverage data (no evidence added)
    #[test]
    fn test_apply_coverage_weights_no_match() {
        use crate::bug_hunter::Finding;

        let index = CoverageIndex::new(); // empty index

        let mut findings =
            vec![Finding::new("F-004", "src/missing.rs", 1, "No coverage data")
                .with_suspiciousness(0.5)];

        apply_coverage_weights(&mut findings, &index, 1.0);

        // Should be unchanged (no matching coverage)
        assert!(
            (findings[0].suspiciousness - 0.5).abs() < 0.01,
            "Suspiciousness should be unchanged"
        );
        assert!(
            findings[0].evidence.is_empty(),
            "No evidence should be added when no coverage match"
        );
    }

    /// Test load_coverage_index with a temp file
    #[test]
    fn test_load_coverage_index_from_file() {
        let temp_dir = std::env::temp_dir().join("batuta_coverage_load_test");
        let _ = std::fs::remove_dir_all(&temp_dir);
        std::fs::create_dir_all(&temp_dir).expect("mkdir failed");

        let lcov_path = temp_dir.join("lcov.info");
        std::fs::write(&lcov_path, "SF:src/lib.rs\nDA:1,5\nDA:2,0\nend_of_record\n")
            .expect("fs write failed");

        let index = load_coverage_index(&lcov_path);
        assert!(index.is_some());
        let index = index.expect("unexpected failure");
        assert_eq!(index.len(), 2);
        assert_eq!(index.get(&(PathBuf::from("src/lib.rs"), 1)), Some(&5));
        assert_eq!(index.get(&(PathBuf::from("src/lib.rs"), 2)), Some(&0));

        let _ = std::fs::remove_dir_all(&temp_dir);
    }

    /// Test load_coverage_index with nonexistent file returns None
    #[test]
    fn test_load_coverage_index_missing_file() {
        let index = load_coverage_index(Path::new("/nonexistent/lcov.info"));
        assert!(index.is_none());
    }

    /// Test find_coverage_file with existing file
    #[test]
    fn test_find_coverage_file_found() {
        let temp_dir = std::env::temp_dir().join("batuta_find_cov_test");
        let _ = std::fs::remove_dir_all(&temp_dir);
        std::fs::create_dir_all(&temp_dir).expect("mkdir failed");

        // Create lcov.info at root
        std::fs::write(temp_dir.join("lcov.info"), "SF:test\nend_of_record\n")
            .expect("fs write failed");

        let result = find_coverage_file(&temp_dir);
        assert!(result.is_some());
        assert!(result.expect("operation failed").ends_with("lcov.info"));

        let _ = std::fs::remove_dir_all(&temp_dir);
    }

    /// Test find_coverage_file with no matching files
    #[test]
    fn test_find_coverage_file_not_found() {
        let temp_dir = std::env::temp_dir().join("batuta_find_cov_none_test");
        let _ = std::fs::remove_dir_all(&temp_dir);
        std::fs::create_dir_all(&temp_dir).expect("mkdir failed");

        let result = find_coverage_file(&temp_dir);
        assert!(result.is_none());

        let _ = std::fs::remove_dir_all(&temp_dir);
    }

    /// Test parse_lcov with malformed DA lines (unparseable numbers)
    #[test]
    fn test_parse_lcov_malformed_da() {
        let content = "SF:src/lib.rs\nDA:abc,def\nDA:1,xyz\nDA:,5\nend_of_record\n";
        let index = parse_lcov(content);
        // None of the malformed DA lines should parse
        assert!(index.is_empty());
    }

    /// Test parse_lcov with DA line missing count field
    #[test]
    fn test_parse_lcov_da_missing_count() {
        let content = "SF:src/lib.rs\nDA:1\nend_of_record\n";
        let index = parse_lcov(content);
        // DA with only one field (no comma) should be skipped
        assert!(index.is_empty());
    }

    /// Test parse_lcov with DA before any SF (no current file)
    #[test]
    fn test_parse_lcov_da_before_sf() {
        let content = "DA:1,5\nSF:src/lib.rs\nDA:2,3\nend_of_record\n";
        let index = parse_lcov(content);
        // First DA should be ignored (no current_file), second should be captured
        assert_eq!(index.len(), 1);
        assert_eq!(index.get(&(PathBuf::from("src/lib.rs"), 2)), Some(&3));
    }

    /// Test coverage_factor for boundary values
    #[test]
    fn test_coverage_factor_boundaries() {
        assert_eq!(coverage_factor(1), 0.2); // lower bound of 1-5 range
        assert_eq!(coverage_factor(5), 0.2); // upper bound of 1-5 range
        assert_eq!(coverage_factor(6), 0.0); // lower bound of 6-20 range
        assert_eq!(coverage_factor(20), 0.0); // upper bound of 6-20 range
        assert_eq!(coverage_factor(21), -0.3); // first value in >20 range
    }

    /// Test coverage_adjusted_suspiciousness clamping at bounds
    #[test]
    fn test_coverage_adjusted_suspiciousness_clamping() {
        // Should clamp to 1.0 max
        let adjusted = coverage_adjusted_suspiciousness(0.9, 0, 2.0);
        assert!(adjusted <= 1.0, "Should clamp to 1.0, got {}", adjusted);

        // Should clamp to 0.0 min
        let adjusted = coverage_adjusted_suspiciousness(0.1, 100, 5.0);
        assert!(adjusted >= 0.0, "Should clamp to 0.0, got {}", adjusted);
    }
}