fix: Make mocha-junit-reporter work with Mocha 6 (#80)

This change is compatible with mocha 6+ and earlier versions

.travis.yml

@@ -1,8 +1,9 @@
 language: node_js
 node_js:
-  - '6'
-  - '8'
-  - '10'
+  - "6"
+  - "8"
+  - "10"
+script: npm test
 deploy:
   provider: npm
   email: $NPM_EMAIL

README.md

@@ -200,4 +200,4 @@ output line 2
 [travis-build]: https://travis-ci.org/michaelleeallen/mocha-junit-reporter
 [npm-badge]: https://img.shields.io/npm/v/mocha-junit-reporter.svg?maxAge=2592000
 [npm-listing]: https://www.npmjs.com/package/mocha-junit-reporter
-[ant-schema]: http://windyroad.org/dl/Open%20Source/JUnit.xsd
+[ant-schema]: http://windyroad.org/dl/Open%20Source/JUnit.xsd

index.js

@@ -9,6 +9,23 @@ var mkdirp = require('mkdirp');
 var md5 = require('md5');
 var stripAnsi = require('strip-ansi');
 
+var createStatsCollector;
+var mocha6plus;
+
+try {
+  var json = JSON.parse(
+    fs.readFileSync("./node_modules/mocha/package.json", "utf8")
+  );
+  version = json.version;
+  if (version >= "6") {
+    createStatsCollector = require("mocha/lib/stats-collector");
+    mocha6plus = true;
+  } else {
+    mocha6plus = false;
+  }
+} catch (e) {
+  console.warn("Couldn't determine Mocha version");
+}
 module.exports = MochaJUnitReporter;
 
 // A subset of invalid characters as defined in http://www.w3.org/TR/xml/#charsets that can occur in e.g. stacktraces
@@ -155,6 +172,9 @@ function getJenkinsClassname (test) {
  * @param {Object} options - mocha options
  */
 function MochaJUnitReporter(runner, options) {
+  if (mocha6plus) {
+    createStatsCollector(runner);
+  }
   this._options = configureDefaults(options);
   this._runner = runner;
   this._generateSuiteTitle = this._options.useFullSuiteTitle ? fullSuiteTitle : defaultSuiteTitle;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mocha-junit-reporter",
-  "version": "1.22.0",
+  "version": "1.23.0",
   "description": "A JUnit reporter for mocha.",
   "main": "index.js",
   "scripts": {