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rOACCT/node_modules/c8/lib/commands/check-coverage.js
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check-coverage.js
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			const { relative } = require('path')
			const Report = require('../report')

			exports.command = 'check-coverage'

			exports.describe = 'check whether coverage is within thresholds provided'

			exports.builder = function (yargs) {
			yargs
			.example('$0 check-coverage --lines 95', "check whether the JSON in c8's output folder meets the thresholds provided")
			}

			exports.handler = function (argv) {
			// TODO: this is a workaround until yargs gets upgraded to v17, see https://github.com/bcoe/c8/pull/332#discussion_r721636191
			if (argv['100']) {
			argv.lines = 100
			argv.functions = 100
			argv.branches = 100
			argv.statements = 100
			}

			const report = Report({
			include: argv.include,
			exclude: argv.exclude,
			extension: argv.extension,
			reporter: Array.isArray(argv.reporter) ? argv.reporter : [argv.reporter],
			reportsDirectory: argv['reports-dir'],
			tempDirectory: argv.tempDirectory,
			watermarks: argv.watermarks,
			resolve: argv.resolve,
			omitRelative: argv.omitRelative,
			wrapperLength: argv.wrapperLength,
			all: argv.all
			})
			exports.checkCoverages(argv, report)
			}

			exports.checkCoverages = async function (argv, report) {
			const thresholds = {
			lines: argv.lines,
			functions: argv.functions,
			branches: argv.branches,
			statements: argv.statements
			}
			const map = await report.getCoverageMapFromAllCoverageFiles()
			if (argv.perFile) {
			map.files().forEach(file => {
			checkCoverage(map.fileCoverageFor(file).toSummary(), thresholds, file)
			})
			} else {
			checkCoverage(map.getCoverageSummary(), thresholds)
			}
			}

			function checkCoverage (summary, thresholds, file) {
			Object.keys(thresholds).forEach(key => {
			const coverage = summary[key].pct
			if (coverage < thresholds[key]) {
			process.exitCode = 1
			if (file) {
			console.error(
			'ERROR: Coverage for ' + key + ' (' + coverage + '%) does not meet threshold (' + thresholds[key] + '%) for ' +
			relative('./', file).replace(/\\/g, '/') // standardize path for Windows.
			)
			} else {
			console.error('ERROR: Coverage for ' + key + ' (' + coverage + '%) does not meet global threshold (' + thresholds[key] + '%)')
			}
			}
			})
			}