Mapper for vs code extension CodeMap used to outline Jest tests

mapper.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const fs = require("fs");

const reg = /((^it)|(^test)|(^describe))((\.skip)|(\.only))?\(['"](.*)['"]/
const skipPrefix = '⚪️ ';
const isolatedPrefix = '🔵 ';
const descriptionIcon = 'level3';
const testIcon = 'none';

const getMatch = (line) => line.trimLeft().match(reg);
const isTest = (line) => getMatch(line)[2] || getMatch(line)[3];
const isDescription = (line) => getMatch(line)[4];
const getText = (line) => getMatch(line)[8];
const isSkipped = (line) => getMatch(line)[6];
const isIsolated = (line) => getMatch(line)[7];

class mapper {

  static read_all_lines(file) {
    let text = fs.readFileSync(file, 'utf8');
    return text.split(/\r?\n/g);
  }

  static generate(file) {
    let members = [];
    try {
      let line_num = 0;
      let image_index = 1;
      mapper
        .read_all_lines(file)
        .forEach(line => {
          line_num++;

          if (getMatch(line)) {
            let text = getText(line);
            let icon = descriptionIcon;

            if (isSkipped(line)) text = skipPrefix + text;
            if (isIsolated(line)) text = isolatedPrefix + text;

            if (isTest(line)) {
              icon = testIcon;
              text = '  ' + text;
            }

            members.push(`${text}|${line_num}|${icon}`);
          }
        });
    }
    catch (error) {
    }
    return members;
  }
}

exports.mapper = mapper;

This is a dedicated mapper used with the vs code extension CodeMap to outline Jest tests in the sidebar. Should work (but I have not tested) with other test frameworks that use the same syntax (describe/it/test).

Instructions of how to add the dedicated mapper:
https://github.com/oleg-shilo/codemap.vscode/wiki/Adding-custom-mappers#mapping-with-a-dedicated-mapper