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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 TeamcityReport extends ReportBase {
	constructor(opts) {
	super();

	opts = opts \|\| {};
	this.file = opts.file \|\| null;
	this.blockName = opts.blockName \|\| 'Code Coverage Summary';
	}

	onStart(node, context) {
	const metrics = node.getCoverageSummary();
	const cw = context.writer.writeFile(this.file);

	cw.println('');
	cw.println("##teamcity[blockOpened name='" + this.blockName + "']");

	//Statements Covered
	cw.println(
	lineForKey(metrics.statements.covered, 'CodeCoverageAbsBCovered')
	);
	cw.println(
	lineForKey(metrics.statements.total, 'CodeCoverageAbsBTotal')
	);

	//Branches Covered
	cw.println(
	lineForKey(metrics.branches.covered, 'CodeCoverageAbsRCovered')
	);
	cw.println(lineForKey(metrics.branches.total, 'CodeCoverageAbsRTotal'));

	//Functions Covered
	cw.println(
	lineForKey(metrics.functions.covered, 'CodeCoverageAbsMCovered')
	);
	cw.println(
	lineForKey(metrics.functions.total, 'CodeCoverageAbsMTotal')
	);

	//Lines Covered
	cw.println(
	lineForKey(metrics.lines.covered, 'CodeCoverageAbsLCovered')
	);
	cw.println(lineForKey(metrics.lines.total, 'CodeCoverageAbsLTotal'));

	cw.println("##teamcity[blockClosed name='" + this.blockName + "']");
	cw.close();
	}
	}

	function lineForKey(value, teamcityVar) {
	return (
	"##teamcity[buildStatisticValue key='" +
	teamcityVar +
	"' value='" +
	value +
	"']"
	);
	}

	module.exports = TeamcityReport;