babel-istanbul/lib/report/text-lcov.js

Yet another JS code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests. Supports all JS coverage use cases including unit tests, server side functional tests

var LcovOnly = require('./lcovonly'),
  util = require('util');

/**
 * a `Report` implementation that produces an LCOV coverage and prints it
 *  to standard out.
 *
 * Usage
 * -----
 *
 *      var report = require('istanbul').Report.create('text-lcov');
 *
 * @class TextLcov
 * @module report
 * @extends LcovOnly
 * @constructor
 * @param {Object} opts optional
 * @param {String} [opts.log] the method used to log to console.
 */
function TextLcov(opts) {
    var that = this;

    LcovOnly.call(this);

    this.opts = opts || {};
    this.opts.log = this.opts.log || console.log;
    this.opts.writer = {
        println: function (ln) {
            that.opts.log(ln);
        }
    };
}

TextLcov.TYPE = 'text-lcov';
util.inherits(TextLcov, LcovOnly);

LcovOnly.super_.mix(TextLcov, {
    writeReport: function (collector) {
        var that = this,
            writer = this.opts.writer;

        collector.files().forEach(function (key) {
            that.writeFileCoverage(writer, collector.fileCoverageFor(key));
        });

        this.emit('done');
    }
});

module.exports = TextLcov;