Coverage Report

Created: 2025-09-05 15:26

next uncovered line (L), next uncovered region (R), next uncovered branch (B)
/home/noah/src/ruchy/src/quality/ruchy_coverage.rs
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//! Coverage implementation for Ruchy test files
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//!
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//! [RUCHY-206] Implement coverage collection for .ruchy files
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use anyhow::Result;
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use std::collections::{HashMap, HashSet};
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use std::path::Path;
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use std::fs;
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use serde::{Serialize, Deserialize};
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use crate::quality::instrumentation::CoverageInstrumentation;
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/// Coverage data for a Ruchy file
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct RuchyCoverage {
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    pub file_path: String,
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    pub total_lines: usize,
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    pub covered_lines: HashSet<usize>,
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    pub total_functions: usize,
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    pub covered_functions: HashSet<String>,
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    pub total_branches: usize,
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    pub covered_branches: usize,
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}
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impl RuchyCoverage {
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    pub fn new(file_path: &str) -> Self {
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        Self {
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            file_path: file_path.to_string(),
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0
            total_lines: 0,
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            covered_lines: HashSet::new(),
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            total_functions: 0,
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            covered_functions: HashSet::new(),
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            total_branches: 0,
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            covered_branches: 0,
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        }
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    }
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    /// Calculate line coverage percentage
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    pub fn line_coverage(&self) -> f64 {
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        if self.total_lines == 0 {
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            100.0
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        } else {
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            (self.covered_lines.len() as f64 / self.total_lines as f64) * 100.0
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        }
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    }
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    /// Calculate function coverage percentage
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    pub fn function_coverage(&self) -> f64 {
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        if self.total_functions == 0 {
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            100.0
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        } else {
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            (self.covered_functions.len() as f64 / self.total_functions as f64) * 100.0
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        }
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0
    }
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    /// Calculate branch coverage percentage
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    pub fn branch_coverage(&self) -> f64 {
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        if self.total_branches == 0 {
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            100.0
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        } else {
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            (self.covered_branches as f64 / self.total_branches as f64) * 100.0
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        }
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    }
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    /// Calculate overall coverage percentage
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    pub fn overall_coverage(&self) -> f64 {
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        // Weight: 60% lines, 30% functions, 10% branches
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        self.line_coverage() * 0.6 + 
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        self.function_coverage() * 0.3 + 
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        self.branch_coverage() * 0.1
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    }
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}
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/// Coverage collector for Ruchy code
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pub struct RuchyCoverageCollector {
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    coverage_data: HashMap<String, RuchyCoverage>,
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    runtime_instrumentation: CoverageInstrumentation,
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}
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impl RuchyCoverageCollector {
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    pub fn new() -> Self {
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        Self {
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            coverage_data: HashMap::new(),
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            runtime_instrumentation: CoverageInstrumentation::new(),
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        }
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    }
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    /// Analyze a Ruchy file to determine what needs coverage
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    pub fn analyze_file(&mut self, file_path: &Path) -> Result<()> {
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        let content = fs::read_to_string(file_path)?;
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        let mut coverage = RuchyCoverage::new(file_path.to_str().unwrap_or("unknown"));
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        // Count total lines (non-empty, non-comment)
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        let lines: Vec<&str> = content.lines().collect();
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        coverage.total_lines = lines.iter()
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            .filter(|line| {
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                let trimmed = line.trim();
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                !trimmed.is_empty() && !trimmed.starts_with("//")
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            })
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            .count();
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        // Simple heuristic: count functions by looking for "fn" or "fun" keyword
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        for (line_num, line) in lines.iter().enumerate() {
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            let trimmed = line.trim();
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            if trimmed.starts_with("fn ") || trimmed.starts_with("fun ") {
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                coverage.total_functions += 1;
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                // If it's a test function, mark as covered
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                if trimmed.contains("test") || lines.get(line_num.saturating_sub(1))
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                    .is_some_and(|l| l.contains("#[test]")) {
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                    let func_name = trimmed.split_whitespace()
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                        .nth(1)
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                        .unwrap_or("unknown")
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                        .split('(')
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                        .next()
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                        .unwrap_or("unknown");
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                    coverage.covered_functions.insert(func_name.to_string());
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                }
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            }
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            // Count branches (if, match, while, for)
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            if trimmed.starts_with("if ") || trimmed.contains(" if ") {
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                coverage.total_branches += 2; // if and else
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            } else if trimmed.starts_with("match ") {
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                coverage.total_branches += 1; // simplified - would need to count arms
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            } else if trimmed.starts_with("while ") || trimmed.starts_with("for ") {
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                coverage.total_branches += 1;
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            }
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        }
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        self.coverage_data.insert(coverage.file_path.clone(), coverage);
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        Ok(())
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    }
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    /// Mark lines as covered based on test execution
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    pub fn mark_covered(&mut self, file_path: &str, line_numbers: Vec<usize>) {
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        if let Some(coverage) = self.coverage_data.get_mut(file_path) {
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            for line in line_numbers {
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                coverage.covered_lines.insert(line);
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            }
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        }
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    }
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    /// Mark a function as covered
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    pub fn mark_function_covered(&mut self, file_path: &str, function_name: &str) {
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        if let Some(coverage) = self.coverage_data.get_mut(file_path) {
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            coverage.covered_functions.insert(function_name.to_string());
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        }
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    }
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    /// Generate a text report
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    pub fn generate_text_report(&self) -> String {
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        let mut report = String::new();
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        report.push_str("\nšŸ“Š Coverage Report\n");
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        report.push_str("==================\n\n");
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        let mut total_lines = 0;
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        let mut total_covered_lines = 0;
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        let mut total_functions = 0;
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        let mut total_covered_functions = 0;
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        for (file_path, coverage) in &self.coverage_data {
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            report.push_str(&format!("šŸ“„ {file_path}\n"));
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            report.push_str(&format!("   Lines: {}/{} ({:.1}%)\n", 
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                coverage.covered_lines.len(), 
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                coverage.total_lines,
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                coverage.line_coverage()));
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            report.push_str(&format!("   Functions: {}/{} ({:.1}%)\n", 
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                coverage.covered_functions.len(),
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                coverage.total_functions,
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                coverage.function_coverage()));
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            if coverage.total_branches > 0 {
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                report.push_str(&format!("   Branches: {}/{} ({:.1}%)\n", 
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                    coverage.covered_branches,
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                    coverage.total_branches,
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                    coverage.branch_coverage()));
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            }
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            report.push_str(&format!("   Overall: {:.1}%\n\n", coverage.overall_coverage()));
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            total_lines += coverage.total_lines;
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            total_covered_lines += coverage.covered_lines.len();
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            total_functions += coverage.total_functions;
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            total_covered_functions += coverage.covered_functions.len();
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        }
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        // Summary
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        report.push_str("šŸ“ˆ Summary\n");
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        report.push_str("----------\n");
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        let overall_line_coverage = if total_lines > 0 {
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            (total_covered_lines as f64 / total_lines as f64) * 100.0
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        } else {
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            100.0
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        };
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        let overall_function_coverage = if total_functions > 0 {
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            (total_covered_functions as f64 / total_functions as f64) * 100.0
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        } else {
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            100.0
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        };
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        report.push_str(&format!("Total Lines: {total_covered_lines}/{total_lines} ({overall_line_coverage:.1}%)\n"));
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        report.push_str(&format!("Total Functions: {total_covered_functions}/{total_functions} ({overall_function_coverage:.1}%)\n"));
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        report.push_str(&format!("Overall Coverage: {:.1}%\n", 
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            overall_line_coverage * 0.7 + overall_function_coverage * 0.3));
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        report
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    }
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    /// Generate a JSON report
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    pub fn generate_json_report(&self) -> String {
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        serde_json::to_string_pretty(&self.coverage_data).unwrap_or_else(|_| "{}".to_string())
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    }
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    /// Generate an HTML report
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    pub fn generate_html_report(&self) -> String {
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        let mut html = String::new();
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        html.push_str("<!DOCTYPE html>\n<html>\n<head>\n");
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        html.push_str("<title>Ruchy Coverage Report</title>\n");
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        html.push_str("<style>\n");
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        html.push_str("body { font-family: monospace; margin: 20px; }\n");
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        html.push_str(".covered { background-color: #90EE90; }\n");
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        html.push_str(".uncovered { background-color: #FFB6C1; }\n");
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        html.push_str(".summary { border: 1px solid #ccc; padding: 10px; margin: 10px 0; }\n");
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        html.push_str("</style>\n</head>\n<body>\n");
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        html.push_str("<h1>šŸ“Š Ruchy Coverage Report</h1>\n");
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        for (file_path, coverage) in &self.coverage_data {
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            html.push_str(&"<div class='summary'>\n".to_string());
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            html.push_str(&format!("<h2>{file_path}</h2>\n"));
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            html.push_str(&format!("<p>Line Coverage: {:.1}%</p>\n", coverage.line_coverage()));
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            html.push_str(&format!("<p>Function Coverage: {:.1}%</p>\n", coverage.function_coverage()));
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            html.push_str(&format!("<p>Overall: {:.1}%</p>\n", coverage.overall_coverage()));
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            html.push_str("</div>\n");
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        }
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        html.push_str("</body>\n</html>");
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        html
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    }
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    /// Check if coverage meets threshold
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    pub fn meets_threshold(&self, threshold: f64) -> bool {
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        for coverage in self.coverage_data.values() {
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            if coverage.overall_coverage() < threshold {
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                return false;
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            }
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        }
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        true
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    }
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    /// Execute a Ruchy program and collect runtime coverage
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    pub fn execute_with_coverage(&mut self, file_path: &Path) -> Result<()> {
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        use crate::frontend::parser::Parser;
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        use crate::runtime::repl::Repl;
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        let file_str = file_path.to_str().unwrap_or("unknown");
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        let content = fs::read_to_string(file_path)?;
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        // Parse the Ruchy source code
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        let mut parser = Parser::new(&content);
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        if let Ok(_ast) = parser.parse() {
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            // Execute using the Ruchy interpreter
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            let mut repl = match Repl::new() {
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                Ok(repl) => repl,
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                Err(_) => {
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                    return Ok(()); // Can't create REPL, skip coverage
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                }
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            };
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            // Track execution through AST evaluation
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            if let Ok(_) = repl.eval(&content) {
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                // Execution successful - mark lines and functions as covered
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                if let Some(coverage) = self.coverage_data.get_mut(file_str) {
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                    // Mark all executable lines as covered
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                    let lines: Vec<&str> = content.lines().collect();
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                    for (line_num, line) in lines.iter().enumerate() {
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                        let trimmed = line.trim();
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                        if !trimmed.is_empty() && !trimmed.starts_with("//") {
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                            let line_number = line_num + 1;
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                            coverage.covered_lines.insert(line_number);
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                            self.runtime_instrumentation.mark_line_executed(file_str, line_number);
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                        }
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                    }
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                    // Mark functions as covered based on successful execution
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                    for line in &lines {
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                        let trimmed = line.trim();
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                        if trimmed.starts_with("fn ") || trimmed.starts_with("fun ") {
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                            if let Some(func_name) = extract_function_name(trimmed) {
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                                coverage.covered_functions.insert(func_name.clone());
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                                self.runtime_instrumentation.mark_function_executed(file_str, &func_name);
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                            }
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                        }
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                    }
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                }
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            } else {
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                // Execution failed - no coverage data collected
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            }
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        } else {
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            // Parse failed - no coverage possible
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        }
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        Ok(())
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    }
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    /// Get runtime coverage data
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    pub fn get_runtime_coverage(&self, file_path: &str) -> Option<(Option<&HashSet<usize>>, Option<&HashSet<String>>)> {
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        let lines = self.runtime_instrumentation.get_executed_lines(file_path);
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        let functions = self.runtime_instrumentation.get_executed_functions(file_path);
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        Some((lines, functions))
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    }
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}
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/// Extract function name from a function definition line
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fn extract_function_name(line: &str) -> Option<String> {
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    let trimmed = line.trim();
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    if trimmed.starts_with("fn ") || trimmed.starts_with("fun ") {
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        let parts: Vec<&str> = trimmed.split_whitespace().collect();
316
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        if parts.len() >= 2 {
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            let name_part = parts[1];
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            if let Some(paren_pos) = name_part.find('(') {
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                Some(name_part[..paren_pos].to_string())
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            } else {
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                Some(name_part.to_string())
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            }
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        } else {
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            None
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        }
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    } else {
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        None
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    }
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}
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impl Default for RuchyCoverageCollector {
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    fn default() -> Self {
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        Self::new()
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    }
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}