O(log n) sublinear coverage gap detection with risk-weighted analysis and intelligent test prioritization.
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Guide the use of v3's advanced coverage analysis capabilities including sublinear gap detection algorithms, risk-weighted coverage scoring, and intelligent test prioritization based on code criticality.
# Analyze coverage with gap detection
aqe coverage analyze --source src/ --tests tests/
# Find high-risk uncovered code
aqe coverage gaps --risk-weighted --threshold 80
# Generate coverage report
aqe coverage report --format html --output coverage-report/
# Compare coverage between branches
aqe coverage diff --base main --head feature-branch
// Comprehensive coverage analysis
Task("Analyze coverage gaps", `
Perform O(log n) coverage analysis on src/:
- Calculate statement, branch, function coverage
- Identify uncovered critical paths
- Risk-weight gaps by code complexity and change frequency
- Recommend tests to write for maximum coverage impact
`, "qe-coverage-specialist")
// Risk-based prioritization
Task("Prioritize coverage effort", `
Analyze coverage gaps and prioritize by:
- Business criticality (payment, auth, data)
- Code complexity (cyclomatic > 10)
- Recent bug history
- Change frequency
Output prioritized list of files needing tests.
`, "qe-coverage-analyzer")
await coverageAnalyzer.detectGaps({
algorithm: 'sublinear', // O(log n) complexity
source: 'src/**/*.ts',
metrics: ['statement', 'branch', 'function'],
sampling: {
enabled: true,
confidence: 0.95,
maxSamples: 1000
}
});
await coverageAnalyzer.riskWeightedAnalysis({
coverage: coverageReport,
riskFactors: {
complexity: { weight: 0.3, threshold: 10 },
changeFrequency: { weight: 0.25, window: '90d' },
bugHistory: { weight: 0.25, window: '180d' },
criticality: { weight: 0.2, tags: ['payment', 'auth'] }
},
output: {
riskScore: true,
prioritizedGaps: true
}
});
await coverageAnalyzer.diffCoverage({
base: 'main',
head: 'feature-branch',
requirements: {
newCode: 80, // New code must have 80% coverage
modifiedCode: 'maintain', // Don't decrease existing
deletedCode: 'ignore'
}
});
thresholds:
global:
statements: 80
branches: 75
functions: 85
lines: 80
per_file:
min_statements: 70
critical_paths: 90
new_code:
statements: 85
branches: 80
exceptions:
- path: "src/migrations/**"
reason: "Database migrations"
- path: "src/generated/**"
reason: "Auto-generated code"
interface CoverageAnalysis {
summary: {
statements: { covered: number; total: number; percentage: number };
branches: { covered: number; total: number; percentage: number };
functions: { covered: number; total: number; percentage: number };
};
gaps: {
file: string;
uncoveredLines: number[];
uncoveredBranches: BranchInfo[];
riskScore: number;
suggestedTests: string[];
}[];
trends: {
period: string;
coverageChange: number;
newGaps: number;
closedGaps: number;
};
recommendations: {
priority: 'critical' | 'high' | 'medium' | 'low';
file: string;
action: string;
expectedImpact: number;
}[];
}
quality_gates:
coverage:
block_merge:
- new_code_coverage < 80
- coverage_regression > 5
- critical_path_uncovered
warn:
- overall_coverage < 75
- branch_coverage < 70
metrics:
- track_trends: true
- alert_on_decline: 3 # consecutive PRs
Primary Agents: qe-coverage-specialist, qe-coverage-analyzer, qe-gap-detector Coordinator: qe-coverage-coordinator Related Skills: qe-test-generation, qe-quality-assessment
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