OpenSphere Code Coverage Loader

Instrument JS files with istanbul-lib-instrument for subsequent code coverage reporting.

This project is forked from istanbul-instrumenter-loader to provide additional maintenance in support of OpenSphere.

Install

npm i -D istanbul-instrumenter-loader

Usage

Add the loader to the webpack config:

module: {
  rules: [
    {
      test: /\.js$/,
      use: {
        loader: '@ngageoint/opensphere-coverage-loader',
        options: {esModules: true}
      },
      include: path.resolve('src')
    }
  ]
}

Then configure karma-coverage-istanbul-reporter as your test coverage reporter.

Options

The loader supports all options supported by istanbul-lib-instrument

|Name|Type|Default|Description| |:--:|:--:|:-----:|:----------| |debug|{Boolean}|false|Turn on debugging mode| |compact|{Boolean}|true|Generate compact code| |autoWrap|{Boolean}|false|Set to true to allow return statements outside of functions| |esModules|{Boolean}|false|Set to true to instrument ES2015 Modules| |coverageVariable|{String}|__coverage__|Name of global coverage variable| |preserveComments|{Boolean}|false|Preserve comments in output| |produceSourceMap|{Boolean}|false|Set to true to produce a source map for the instrumented code| |sourceMapUrlCallback|{Function}|null|A callback function that is called when a source map URL is found in the original code. This function is called with the source filename and the source map URL|