After upgrading to version 4 mocha tests no longer run

[miroslawmajka]

The program just hangs with gulp-mocha version 4:

$ gulp test-ping
2017-02-23 11:25:08.592 - info: Using "qa" environment for tests.
[11:25:08] Using gulpfile C:\Development\project\gulpfile.js
[11:25:08] Starting 'test-ping'...

Task:

const gulp = require('gulp');
const mocha = require('gulp-mocha');

gulp.task('ping-task, () => gulp
    .src(['ping-tests.js'], {read: false})
    .pipe(mocha({
        reporter: 'spec',
        timeout: 90000,,
        useColors: true
    })));

Upon downgrading to 3.0.1 all works fine.

System: Windows 10
Node: 6.10.0

Some of the relevant gulp package:

"gulp": "^3.9.1",
"gulp-cucumber": "0.0.22",
"gulp-mocha": "^4.0.1",
"gulp-webdriver": "^2.0.3",

[pleerock]

same here

[hooddanielc]

👍 I have the same issue

Here is an example app that reproduces this issue

Installing gulp-mocha@v3.0.1 fixes my issues.

[tkirda]

Just add:

mocha({
    compilers: 'js:babel-core/register',
  // ...
})

[hooddanielc]

@tkirda I tried that along with many other suggestion. I made an example app that reproduces issue here.

This is the gulpfile.js

const register = require('babel-core/register');

const gulp = require('gulp');
const babel = require('gulp-babel');
const mocha = require('gulp-mocha');

gulp.task('test-with-suggested', () => {
  gulp.src('./src/**/*.js')
    .pipe(mocha({
      compilers: {
        js: 'js:babel-core/register'
      }
    }));
});

gulp.task('test-with-js-property', () => {
  gulp.src('./src/**/*.js')
    .pipe(mocha({
      compilers: {
        js: 'js:babel-core/register'
      }
    }));
});


gulp.task('test-with-register', () => {
  gulp.src('./src/**/*.js')
    .pipe(mocha({
      compilers: {
        js: register
      }
    }));
});

gulp.task('test-with-babel', () => {
  gulp.src('./src/**/*.js')
    .pipe(mocha({
      compilers: {
        js: babel
      }
    }));
});

What am I doing wrong?

[tkirda]

Look at my sample, compilers is not an object, but a string value: compilers: 'js:babel-core/register'

[hooddanielc]

Sorry, I made a typo above >.<

@tkirda the below works with mocha@4.0.1

const gulp = require('gulp');
const babel = require('gulp-babel');
const mocha = require('gulp-mocha');

gulp.task('test-with-suggested', () => {
  gulp.src('./test/**/*.js')
    .pipe(mocha({
      compilers: 'js:babel-core/register'
    }));
});

I expect this question to come up a lot, so I created a pull request.

Many Thanks!

[pleerock]

what about users who dont use babel?

[hooddanielc]

@miroslawmajka Have you tried deleting your node_modules folder and reinstalling with npm install?

[miroslawmajka]

@hooddanielc Yes, just tried that exact scenario with deleting node_modules and installing version 4.0.1 of gulp mocha. Tests eventually run but with the following error message:

[15:56:25] Using gulpfile C:\Development\tp-automation\gulpfile.js
[15:56:25] Starting 'test-ping'...
[15:56:47] 'test-ping' errored after 23 s
[15:56:47] Error in plugin 'gulp-mocha'
Message:
    spawn undefined ENOENT
Details:
    errno: ENOENT
    code: ENOENT
    syscall: spawn undefined
    killed: false

Going back to 3.0.1 again as this isn't stable. We have no intention in using babel as it has proven to be very slow in our automated test scenarios.

[hooddanielc]

@miroslawmajka your problem is almost certainty IPC related. I think it has something to do with this commit. 3e55175 . Multi platform IPC has given me a lot of problems before especiallly when developing after Linux implementations.

Maybe execa might be the issue.

[hooddanielc]

@miroslawmajka what happens when you run gulp-mocha's unit test?

[miroslawmajka]

C:\Development\gulp-mocha-test\node_modules\gulp-mocha>npm test

> gulp-mocha@4.0.1 test C:\Development\gulp-mocha-test\node_modules\gulp-mocha
> xo && mocha

Warning: Could not find any test files matching pattern: test
No test files found
npm ERR! Test failed.  See above for more details.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

[hooddanielc]

@miroslawmajka Please clone gulp-mocha outside of your project and run the tests. You shouldn't have to install any global modules.

git clone https://github.com/sindresorhus/gulp-mocha.git
cd gulp-mocha
npm i
npm test

If you install your modules locally, any script commands defined in package.json will look in your local node_modules/.bin folder automatically.

[miroslawmajka]

@hooddanielc all passed (4 tests). Not sure why it wouldn't work inside the project.