cbfl/build/coverageConverter.js

library that can be used to automatically find points of failure in TypeScript Modules that are tested with Mocha

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.convertCoverage = exports.loadCoverage = void 0;
const fs = __importStar(require("fs"));
const url = __importStar(require("url"));
const path = __importStar(require("path"));
// eslint-disable-next-line @typescript-eslint/no-var-requires
const v8_to_istanbul_1 = __importDefault(require("v8-to-istanbul"));
const loadCoverage = async (coverageFile) => {
    const data = fs.readFileSync(coverageFile, "utf8");
    const dataObject = JSON.parse(data);
    const coverage = dataObject.result;
    const sourceMap = dataObject["source-map-cache"];
    if (!sourceMap) {
        console.log("No source map found.");
        return null;
    }
    return {
        coverage,
        sourceMap,
    };
};
exports.loadCoverage = loadCoverage;
const convertCoverage = async (coverage, sourceMap, target) => {
    const sources = {
        sourceMap: null,
        source: null,
    };
    const targetSourceMap = sourceMap[url.pathToFileURL(target).href];
    if (!targetSourceMap)
        return null;
    sources.sourceMap = {
        sourcemap: targetSourceMap.data,
    };
    let source = "";
    targetSourceMap.lineLengths.forEach((length) => {
        source += `${"".padEnd(length, ".")}\n`;
    });
    sources.source = source;
    const converter = v8_to_istanbul_1.default(url.pathToFileURL(target).href, undefined, sources);
    await converter.load();
    const aabb = coverage.filter((r) => r.url.includes(target))[0].functions;
    converter.applyCoverage(aabb);
    const convertedCoverage = converter.toIstanbul();
    return convertedCoverage[path.resolve(target)];
};
exports.convertCoverage = convertCoverage;