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    isparta-loader

    2.0.0 • Public • Published

    isparta instrumenter loader for webpack

    npm deps

    Instrument Babel code with isparta for subsequent code coverage reporting.

    Install

    $ npm i -D isparta-loader

    Setup

    References

    Project structure

    Let's say you have the following:

    ├── src/
    │   └── components/
    │       ├── bar/
    │       │   └── index.js
    │       └── foo/
    │           └── index.js
    └── test/
        └── src/
            └── components/
                └── foo/
                    └── index.js
    

    To create a code coverage report for all components (even for those for which you have no tests yet) you have to require all the 1) sources and 2) tests. Something like it's described in "alternative usage" of karma-webpack:

    test/index.js

    // require all `test/components/**/index.js`
    const testsContext = require.context('./src/components/', true, /index\.js$/);
     
    testsContext.keys().forEach(testsContext);
     
    // require all `src/components/**/index.js`
    const componentsContext = require.context('../src/components/', true, /index\.js$/);
     
    componentsContext.keys().forEach(componentsContext);

    This file will be the only entry point for Karma:

    karma.conf.js

    config.set({
        …
        files: [
            'test/index.js'
        ],
        preprocessors: {
            'test/index.js': 'webpack'
        },
        webpack: {
            …
            module: {
                preLoaders: [
                    // transpile all files except testing sources with babel as usual
                    {
                        test: /\.js$/,
                        exclude: [
                            path.resolve('src/components/'),
                            path.resolve('node_modules/')
                        ],
                        loader: 'babel'
                    },
                    // transpile and instrument only testing sources with isparta
                    {
                        test: /\.js$/,
                        include: path.resolve('src/components/'),
                        loader: 'isparta'
                    }
                ]
            }
            …
        },
        reporters: [ 'progress', 'coverage' ],
        coverageReporter: {
            type: 'text'
        },
        …
    });

    License

    WTFPL

    Install

    npm i isparta-loader

    DownloadsWeekly Downloads

    3,402

    Version

    2.0.0

    License

    WTFPL

    Last publish

    Collaborators

    • deepsweet