Adding LCOV generation to `grunt-mocha-blanket` to enhance `chaplin-mocha-grunt`

README.md

• Need to configure grunt-mocha-blanket to pass LCOV info over (via https://github.com/alex-seville/blanket/blob/91528273af0fe495fdefd4ef8854d4a8a14ed56c/src/reporters/lcov_reporter.js#L27)
  • Should be able to pass it in via blanket events (like in the reporter https://github.com/ModelN/grunt-blanket-mocha/blob/063457ffdf4d83861dc01c5eff4f5530dac90964/support/grunt-reporter.js#L69)
  • Write the coverage content into a string in the task (somewhere in https://github.com/ModelN/grunt-blanket-mocha/blob/063457ffdf4d83861dc01c5eff4f5530dac90964/tasks/blanket_mocha.js#L99).
  • Might need to create a new option for the name of the LCOV file.
    • Write to destination with something like https://github.com/kmiyashiro/grunt-mocha/blob/ce7fc530d33cf30fa7cc0f74b346ebc36a2061fe/tasks/mocha.js#L283
• Some initial work seems to be done via GruntBlanketMocha/grunt-blanket-mocha#22

check-coverage.coffee

if window.PHANTOMJS or window.location.search.indexOf('cov=true') >= 0
  # Synchronously get Blanket.
  request = new XMLHttpRequest()
  request.open 'GET', '../vendor/bower/blanket/dist/qunit/blanket.js', no
  request.send()

  script = document.createElement 'script'
  script.type = 'text/javascript'
  # There is no event fired when HTML report is added to tests.
  script.text = request.responseText +
    # Add checkbox to toggle uncovered branches/lines.
    """
    (function() {
      var report = blanket.report;
      blanket.report = function() {
        report.apply(blanket, arguments);
        $("#blanket-main .rs:contains('100 %')")
          .parent(":not('.grand-total')").hide();
        $(".bl-success:not(.grand-total) > .rs:nth-child(4)").each(function() {
          var statements = this.innerHTML.split('/');
          if (statements[1] != 0 && statements[0]/statements[1] !== 1) {
            $(this.parentNode).show();
          }
        });
      }
    })();
    """

  script.setAttribute(
    'data-cover-adapter'
    '../node_modules/grunt-blanket-mocha/support/mocha-blanket.js'
  )
  script.setAttribute 'data-cover-flags', 'branchTracking'
  script.setAttribute 'data-cover-never', '[\'templates\']'
  script.setAttribute(
    'data-cover-only'
    '//src/(controllers|ext|lib|models|views)/'
  )
  script.setAttribute(
    'data-cover-reporter'
    '../vendor/bower/blanket/src/reporters/lcov_reporter.js'
  )
  script.setAttribute(
    'data-cover-reporter-options'
    '{ "toHTML": false}'
  )

  (document.body || document.head).appendChild script