report-generic.js

import CoverageData from './../services/coverage-data';
import Core from './../services/core';
import ReportCommon from './report-common';
import Conf from '../context/conf';
const ReportImpl = Npm.require('istanbul-reports');
  
/**
 * Used by type lcovonly and json
 * create the corresponding file using istanbul api
 * @type {any}
 */
export default class {
  constructor(res, type, options) {
    this.res = res;
    this.options = options;
    this.report = ReportImpl.create(type, this.options);
    this.report.file = this.options.path;
    this.context = ReportCommon.getContext(this.report.file);
  }

  generate() {
    const coverage = Core.getCoverageObject();
    let childs = CoverageData.getLcovonlyReport(coverage);
    this.report.onStart(null, this.context);
    /* istanbul ignore else */
    if (childs.length === 0) {
      this.res.setHeader('Content-type', 'text/plain');
      this.res.statusCode = 500;
      return this.res.end('{"type":"No coverage to export"}');
    }

    this.writeFile(childs);
    this.res.end('{"type":"success"}');
  }

  writeFile(childs) {
    for (let i = 0; i < childs.length; i++) {
      // Remove the COVERAGE_APP_FOLDER from the filepath
      childs[i].fileCoverage.data.path = childs[i].fileCoverage.data.path.replace(Conf.COVERAGE_APP_FOLDER, '');

      this.report.onDetail(childs[i]);
    }
    this.report.onEnd();
  }

}