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code-server/test/unit/coverage.js

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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
const minimatch = require('minimatch');
const fs = require('fs');
const path = require('path');
const iLibInstrument = require('istanbul-lib-instrument');
const iLibCoverage = require('istanbul-lib-coverage');
const iLibSourceMaps = require('istanbul-lib-source-maps');
const iLibReport = require('istanbul-lib-report');
const iReports = require('istanbul-reports');
const REPO_PATH = toUpperDriveLetter(path.join(__dirname, '../../'));
exports.initialize = function (loaderConfig) {
const instrumenter = iLibInstrument.createInstrumenter();
loaderConfig.nodeInstrumenter = function (contents, source) {
if (minimatch(source, '**/test/**')) {
// tests don't get instrumented
return contents;
}
// Try to find a .map file
let map = undefined;
try {
map = JSON.parse(fs.readFileSync(`${source}.map`).toString());
} catch (err) {
// missing source map...
}
return instrumenter.instrumentSync(contents, source, map);
};
};
exports.createReport = function (isSingle) {
const mapStore = iLibSourceMaps.createSourceMapStore();
const coverageMap = iLibCoverage.createCoverageMap(global.__coverage__);
return mapStore.transformCoverage(coverageMap).then((transformed) => {
// Paths come out all broken
let newData = Object.create(null);
Object.keys(transformed.data).forEach((file) => {
const entry = transformed.data[file];
const fixedPath = fixPath(entry.path);
entry.data.path = fixedPath;
newData[fixedPath] = entry;
});
transformed.data = newData;
const context = iLibReport.createContext({
dir: path.join(REPO_PATH, `.build/coverage${isSingle ? '-single' : ''}`),
coverageMap: transformed
});
const tree = context.getTree('flat');
let reports = [];
if (isSingle) {
reports.push(iReports.create('lcovonly'));
} else {
reports.push(iReports.create('json'));
reports.push(iReports.create('lcov'));
reports.push(iReports.create('html'));
}
reports.forEach(report => tree.visit(report, context));
});
};
function toUpperDriveLetter(str) {
if (/^[a-z]:/.test(str)) {
return str.charAt(0).toUpperCase() + str.substr(1);
}
return str;
}
function toLowerDriveLetter(str) {
if (/^[A-Z]:/.test(str)) {
return str.charAt(0).toLowerCase() + str.substr(1);
}
return str;
}
function fixPath(brokenPath) {
const startIndex = brokenPath.lastIndexOf(REPO_PATH);
if (startIndex === -1) {
return toLowerDriveLetter(brokenPath);
}
return toLowerDriveLetter(brokenPath.substr(startIndex));
}