I am trying to run code coverage using https://webpack.js.org/loaders/istanbul-instrumenter-loader/
Here is the karma.conf.js
var testWebpackCfg = require('../webpack/webpack.config.test.js');
module.exports = function(config) {
config.set({
basePath: '../../',
frameworks: ['jasmine'],
plugins: [ 'karma-webpack', 'karma-jasmine-jquery', 'karma-jasmine', 'karma-chrome-launcher','karma-firefox-launcher', 'karma-coverage','karma-spec-reporter', 'karma-jasmine-html-reporter'],
preprocessors: {
'client/test/index.js': ['webpack']
},
reporters: [ 'spec', 'coverage-istanbul'],
coverageIstanbulReporter: {
reports: [ 'text-summary' ],
dir: './coverage',
fixWebpackSourcePaths: true
},
files: [
'client/test/index.js'
],
webpack: testWebpackCfg,
// web server port
port: 9876,
runnerPort: 9100,
urlRoot: '/',
// level of logging
// possible values: LOG_DISABLE || LOG_ERROR || LOG_WARN || LOG_INFO || LOG_DEBUG
logLevel: config.LOG_INFO,
// enable / disable watching file and executing tests whenever any file changes
autoWatch: false,
browsers: ['Chrome'],
singleRun: true
});
};
Webpack config
{
test: /\.js$/i,
exclude: [
paths.appNodeModules
],
use: [
{
loader: require.resolve('babel-loader'),
options: {
presets: ['@babel/preset-env']
}
},
{
loader: require.resolve('istanbul-instrumenter-loader'),
options: {
esModules: true
}
}
]
}
On running the Karma I see this error 'Can not load reporter "coverage-istanbul", it is not registered! Perhaps you are missing some plugin?'
The error got resolved by adding karma-coverage-istanbul-reporter in the karma config plugin.
npm i karma-coverage-istanbul-reporter --save-dev
karma.conf.js
{
...
plugins: ['karma-coverage-istanbul-reporter']
...
}