I\'m trying to use the gulp-mocha module but can\'t figure out a good way to pass over the compilers flag. Is there a way to include this in my gulp task? Maybe in a separate
The top answer relies on using the require hook. This will only work in the current process, and not if you run Mocha tests in a separate process, as with gulp-spawn-mocha
.
This is how you pass compilers into the mocha module:
return mocha({
compilers: [
'js:babel-core/register',
]
});
Mocha will loop through the elements of the compilers
property and split on :
. It will treat the string before it as the extensions to follow, and will inject everything after it into a require()
statement.
For anyone trying it now
gulp.task('test-mocha', function() {
return gulp.src(['tests/acceptance/*.js'], {read: false})
.pipe(
mocha({
compilers: 'js:babel-core/register',
reporter: 'landing'
})
)
.on('error', gutil.log);
});
and on top of the gulp file (gulpfile.js)
var gulp = require('gulp');
var gutil = require('gulp-util');
var mocha = require('gulp-mocha');
var babel = require('babel-register');
run your test and it should work
gulp test-mocha
Justin Maat, you don't need to modify your gulpfile.js
. You just need to use --require
when using gulp
from CLI
:
### before
gulp test
### after
gulp --require babel/register test
Do you notice the difference? And to save you a few keystrokes, add this to your .bashrc
or .zshrc
:
alias gulp='gulp --require babel/register'
and next time, you can use gulp
as normal
gulp test
var mocha = require('gulp-mocha');
var babel = require('babel/register');
gulp.task('mocha', function() {
return gulp.src(['test/**/*.js'])
.pipe(mocha({
compilers: {
js: babel
}
}));
});
Use require('babel-core/register');
at the start of the gulpfile
I just noticed the docs at the bottom state -
For CoffeeScript support, add require('coffee-script') with CoffeeScript 1.6- or require('coffee-script/register') with CoffeeScript 1.7+.
I added a require statement for my own compiler at the top of my gulp file require('./my_compiler');
and this seemed to work.