code: function getFormatterResults() {
      const stripAnsi = require("strip-ansi");
  
      const formatterFiles = fs.readdirSync("./lib/formatters/"),
          rules = {
              "no-else-return": "warn",
              indent: ["warn", 4],
              "space-unary-ops": "error",
              semi: ["warn", "always"],
              "consistent-return": "error"
          },
          cli = new CLIEngine({
              useEslintrc: false,
              baseConfig: { extends: "eslint:recommended" },
              rules
          }),
          codeString = [
              "function addOne(i) {",
              "    if (i != NaN) {",
              "        return i ++",
              "    } else {",
              "      return",
              "    }",
              "};"
          ].join("\n"),
          rawMessages = cli.executeOnText(codeString, "fullOfProblems.js", true),
          rulesMap = cli.getRules(),
          rulesMeta = {};
  
      Object.keys(rules).forEach(ruleId => {
          rulesMeta[ruleId] = rulesMap.get(ruleId).meta;
      });
  
      return formatterFiles.reduce((data, filename) => {
          const fileExt = path.extname(filename),
              name = path.basename(filename, fileExt);
  
          if (fileExt === ".js") {
              const formattedOutput = cli.getFormatter(name)(
                  rawMessages.results,
                  { rulesMeta }
              );
  
              data.formatterResults[name] = {
                  result: stripAnsi(formattedOutput)
              };
          }
          return data;
      }, { formatterResults: {} });
  }
docs: Gets linting results from every formatter, based on a hard-coded snippet and config
  @returns {Object} Output from each formatter