rollup-plugin-coverage/dist/rollup-plugin-coverage.es.js

Istanbul unit test coverage plugin for Rollup.

import { createFilter } from 'rollup-pluginutils';
import istanbul from 'istanbul';

function index( options ) {
	if ( options === void 0 ) options = {};

	var filter = createFilter(options.include, options.exclude);

	return {
	    name: 'coverage',
		transform: function transform ( code, id ) {
		if (!filter(id)) return;

		var sourceMapID = options.sourceMapID !== false;
		var opts = Object.assign({}, options.instrumenterConfig);

		if (sourceMapID) {
			opts.codeGenerationOptions = Object.assign({},
				opts.codeGenerationOptions || {format: {compact: !opts.noCompact}},
				{sourceMap: id, sourceMapWithCode: true}
			);
		}

		opts.esModules = true;
		var instrumenter = new (options.instrumenter || istanbul).Instrumenter(opts);

		code = instrumenter.instrumentSync(code, id);
		var map = sourceMapID ? instrumenter.lastSourceMap().toJSON() : {mappings: ''};

		return { code: code, map: map };
	}
};
}

export default index;