Function accumulateCoverage

test/fixtures.js:18–22

(accMap, cov)

 * fast enough to call once per test without tripping teardown timeouts.
 */
export function accumulateCoverage(accMap, cov) {
    const map = accMap || libCoverage.createCoverageMap({})
    map.merge(cov)
    return map
}

/**
 * Flush the given coverage map to a worker-unique JSON file. Called once