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Bun’s test runner can generate code coverage reports.

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Run with Coverage

bun test --coverage

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Output Formats

# LCOV format
bun test --coverage --coverage-reporter=lcov

# HTML report
bun test --coverage --coverage-reporter=html

# JSON report
bun test --coverage --coverage-reporter=json

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Coverage Thresholds

Set thresholds in bunfig.toml:
bunfig.toml
[test]
coverage = true
coverageThreshold = 80
See Code Coverage for complete documentation.

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