index.js
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	/*
	Copyright 2012-2015, Yahoo Inc.
	Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
	*/
	'use strict';
	const { ReportBase } = require('istanbul-lib-report');

	class TextSummaryReport extends ReportBase {
	constructor(opts) {
	super();

	opts = opts \|\| {};
	this.file = opts.file \|\| null;
	}

	onStart(node, context) {
	const summary = node.getCoverageSummary();
	const cw = context.writer.writeFile(this.file);
	const printLine = function(key) {
	const str = lineForKey(summary, key);
	const clazz = context.classForPercent(key, summary[key].pct);
	cw.println(cw.colorize(str, clazz));
	};

	cw.println('');
	cw.println(
	'=============================== Coverage summary ==============================='
	);
	printLine('statements');
	printLine('branches');
	printLine('functions');
	printLine('lines');
	cw.println(
	'================================================================================'
	);
	cw.close();
	}
	}

	function lineForKey(summary, key) {
	const metrics = summary[key];

	key = key.substring(0, 1).toUpperCase() + key.substring(1);
	if (key.length < 12) {
	key += ' '.substring(0, 12 - key.length);
	}
	const result = [
	key,
	':',
	metrics.pct + '%',
	'(',
	metrics.covered + '/' + metrics.total,
	')'
	].join(' ');
	const skipped = metrics.skipped;
	if (skipped > 0) {
	return result + ', ' + skipped + ' ignored';
	}
	return result;
	}

	module.exports = TextSummaryReport;