Filename	Percent	Total	Covered	Uncovered
src/utils/isMinified.js	76 %	85	65	20

Filename

Percent

Total

Covered

Uncovered

src/utils/isMinified.js

76 %

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */

// @flow

import type { SourceRecord } from "../types";

// Used to detect minification for automatic pretty printing
const SAMPLE_SIZE = 50;
const INDENT_COUNT_THRESHOLD = 5;
const CHARACTER_LIMIT = 250;
const _minifiedCache = new Map();

export function isMinified(source: SourceRecord) {
  if (_minifiedCache.has(source.id)) {
    return _minifiedCache.get(source.id);
  }

  let text = source.get("text");
  if (!text) {
    return false;
  }

  let lineEndIndex = 0;
  let lineStartIndex = 0;
  let lines = 0;
  let indentCount = 0;
  let overCharLimit = false;

  // Strip comments.
  text = text.replace(/\/\*[\S\s]*?\*\/|\/\/(.+|\n)/g, "");

  while (lines++ < SAMPLE_SIZE) {
    lineEndIndex = text.indexOf("\n", lineStartIndex);
    if (lineEndIndex == -1) {
      break;
    }
    if (/^\s+/.test(text.slice(lineStartIndex, lineEndIndex))) {
      indentCount++;
    }
    // For files with no indents but are not minified.
    if (lineEndIndex - lineStartIndex > CHARACTER_LIMIT) {
      overCharLimit = true;
      break;
    }
    lineStartIndex = lineEndIndex + 1;
  }

  const minified =
    indentCount / lines * 100 < INDENT_COUNT_THRESHOLD || overCharLimit;

  _minifiedCache.set(source.id, minified);
  return minified;
}

{"expressions":{"covered_count":65,"uncovered_count":20,"uncovered_locs":[{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":16,"column":26,"offset":524},"end":{"line":16,"column":34,"offset":533}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":17,"column":31,"offset":568},"end":{"line":17,"column":39,"offset":577}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":20,"column":7,"offset":591},"end":{"line":20,"column":10,"offset":595}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":20,"column":14,"offset":598},"end":{"line":20,"column":31,"offset":616}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":21,"column":8,"offset":625},"end":{"line":21,"column":11,"offset":629}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":32,"column":3,"offset":799},"end":{"line":32,"column":58,"offset":855}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":32,"column":10,"offset":806},"end":{"line":32,"column":13,"offset":810}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":32,"column":10,"offset":806},"end":{"line":32,"column":58,"offset":855}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":35,"column":5,"offset":896},"end":{"line":35,"column":53,"offset":945}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":35,"column":20,"offset":911},"end":{"line":35,"column":23,"offset":915}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":35,"column":20,"offset":911},"end":{"line":35,"column":53,"offset":945}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":36,"column":9,"offset":955},"end":{"line":36,"column":20,"offset":967}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":39,"column":21,"offset":1016},"end":{"line":39,"column":24,"offset":1020}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":39,"column":21,"offset":1016},"end":{"line":39,"column":60,"offset":1056}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":39,"column":48,"offset":1043},"end":{"line":39,"column":59,"offset":1055}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":43,"column":9,"offset":1151},"end":{"line":43,"column":20,"offset":1163}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":47,"column":5,"offset":1253},"end":{"line":47,"column":37,"offset":1286}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":47,"column":22,"offset":1270},"end":{"line":47,"column":33,"offset":1282}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":47,"column":22,"offset":1270},"end":{"line":47,"column":37,"offset":1286}},{"source":"/Users/jlaster/src/mozilla/debugger.html/src/utils/isMinified.js","type":"SourceFile","start":{"line":53,"column":22,"offset":1407},"end":{"line":53,"column":30,"offset":1416}}]},"percent":76}

Flow Coverage Report - src/utils/isMinified.js