How to use instrumentFile method in istanbul

Best JavaScript code snippet using istanbul

coverage.js

Source:coverage.js

...20 *  coverage.addInstrumentCandidate(file); // adds a file that needs to be instrumented; should be called before file is `require`d21 *22 *  //Browser tests23 *  var coverage = require('/path/to/this/file');24 *  var instrumentedCode = coverage.instrumentFile(file); //alternatively, use `instrumentCode` if you have already loaded the code25 *  //collect coverage from the browser26 *  // this coverage will be stored as `window.__coverage__`27 *  // and...28 *  coverage.addCoverage(coverageObject); // rinse and repeat29 *  ```30 *31 *  //in all cases, add an exit handler to the process32 *  process.once('exit', function () { coverage.writeReports(outputDir); }); //write coverage reports33 */34/**35 * adds a file as a candidate for instrumentation when require is hooked36 * @method addInstrumentCandidate37 * @param file the file to add as an instrumentation candidate38 */39function addInstrumentCandidate(file) {40    file = path.resolve(file);41    fileMap[file] = true;42}43/**44 * hooks require to instrument all files that have been specified as instrumentation candidates45 * @method hookRequire46 * @param verbose true for debug messages47 */48function hookRequire(verbose) {49    var matchFn = function (file) {50        var match = fileMap[file],51            what = match ? 'Hooking' : 'NOT hooking';52        if (verbose) { console.log(what + file); }53        return match;54    }, transformFn = instrumenter.instrumentSync.bind(instrumenter);55    hook.hookRequire(matchFn, transformFn);56}57/**58 * unhooks require hooks that have been installed59 * @method unhookRequire60 */61function unhookRequire() {62    hook.unhookRequire();63}64/**65 * returns the coverage collector, creating one if necessary and automatically66 * adding the contents of the global coverage object. You can use this method67 * in an exit handler to get the accumulated coverage.68 */69function getCollector() {70    if (!collector) {71        collector = new Collector();72    }73    if (globalAdded) { return collector; }74    if (global['__coverage__']) {75        collector.add(global['__coverage__']);76        globalAdded = true;77    } else {78        console.error('No global coverage found for the node process');79    }80    return collector;81}82/**83 * adds coverage to the collector for browser test cases84 * @param coverageObject the coverage object to add85 */86function addCoverage(coverageObject) {87    if (!collector) { collector = new Collector(); }88    collector.add(coverageObject);89}90/**91 * returns the merged coverage for the collector92 */93function getFinalCoverage() {94    return getCollector().getFinalCoverage();95}96/**97 * writes reports for an array of JSON files representing partial coverage information98 * @method writeReportsFor99 * @param fileList array of file names containing partial coverage objects100 * @param dir the output directory for reports101 */102function writeReportsFor(fileList, dir) {103    var collector = new Collector();104    fileList.forEach(function (file) {105        var coverage = JSON.parse(fs.readFileSync(file, 'utf8'));106        collector.addCoverage(coverage);107    });108    writeReportsInternal(dir, collector);109}110/**111 * writes reports for everything accumulated by the collector112 * @method writeReports113 * @param dir the output directory for reports114 */115function writeReports(dir) {116    writeReportsInternal(dir, getCollector());117}118function writeReportsInternal(dir, collector) {119    dir = dir || process.cwd();120    var reports = [121        Report.create('lcov', { dir: dir }),122        Report.create('text'),123        Report.create('text-summary')124    ];125    reports.forEach(function (report) { report.writeReport(collector, true); })126}127/**128 * returns the instrumented version of the code specified129 * @param {String} code the code to instrument130 * @param {String} file the file from which the code was load131 * @return {String} the instrumented version of the code in the file132 */133function instrumentCode(code, filename) {134    filename = path.resolve(filename);135    return instrumenter.instrumentSync(code, filename);136}137/**138 * returns the instrumented version of the code present in the specified file139 * @param file the file to load140 * @return {String} the instrumented version of the code in the file141 */142function instrumentFile(file) {143    filename = path.resolve(file);144    return instrumentCode(fs.readFileSync(file, 'utf8'), file);145}146module.exports = {147    addInstrumentCandidate: addInstrumentCandidate,148    hookRequire: hookRequire,149    unhookRequire: unhookRequire,150    instrumentCode: instrumentCode,151    instrumentFile: instrumentFile,152    addCoverage: addCoverage,153    writeReports: writeReports...

instrument.js

Source:instrument.js

...25  const sourceFilename = process.argv[2]26  console.log('updating comment values in', sourceFilename)27  const fullFilename = path.join(process.cwd(), sourceFilename)28  const outputFilename = './instrumented.js'29  instrumentFile(fullFilename, outputFilename)...

Using AI Code Generation

1var istanbul = require('istanbul');2var instrumenter = new istanbul.Instrumenter();3var fs = require('fs');4var code = fs.readFileSync('test.js', 'utf8');5var instrumentedCode = instrumenter.instrumentSync(code, 'test.js');6fs.writeFileSync('test-cov.js', instrumentedCode, 'utf8');

Using AI Code Generation

1var istanbul = require('istanbul');2var instrumenter = new istanbul.Instrumenter({ coverageVariable: '__coverage__' });3var fs = require('fs');4var path = require('path');5var source = fs.readFileSync(path.resolve(__dirname, 'test.js'), 'utf-8');6var instrumented = instrumenter.instrumentSync(source, 'test.js');7fs.writeFileSync(path.resolve(__dirname, 'test.js'), instrumented);

Using AI Code Generation

1var istanbul = require('istanbul');2var instrumenter = new istanbul.Instrumenter();3var fs = require('fs');4var path = require('path');5var source = fs.readFileSync(path.join(__dirname, 'test.js'), 'utf8');6var instrumented = instrumenter.instrumentSync(source, 'test.js');7fs.writeFileSync(path.join(__dirname, 'test_instrumented.js'), instrumented);

Using AI Code Generation

1var istanbul = require('istanbul');2var instrumenter = new istanbul.Instrumenter({ coverageVariable: '__coverage__' });3var fs = require('fs');4var path = require('path');5var testFile = path.join(__dirname, 'test.js');6var instrumentedCode = instrumenter.instrumentSync(fs.readFileSync(testFile, 'utf8'), testFile);7fs.writeFileSync('test-instrumented.js', instrumentedCode);8var istanbul = require('istanbul');9var instrumenter = new istanbul.Instrumenter({ coverageVariable: '__coverage__' });10var fs = require('fs');11var path = require('path');12var testFile = path.join(__dirname, 'test.js');13var instrumentedCode = instrumenter.instrumentSync(fs.readFileSync(testFile, 'utf8'), testFile);14fs.writeFileSync('test-instrumented.js', instrumentedCode);15var istanbul = require('istanbul');16var instrumenter = new istanbul.Instrumenter({ coverageVariable: '__coverage__' });17var fs = require('fs');18var path = require('path');19var testFile = path.join(__dirname, 'test.js');20var instrumentedCode = instrumenter.instrumentSync(fs.readFileSync(testFile, 'utf8'), testFile);21fs.writeFileSync('test-instrumented.js', instrumentedCode);

Using AI Code Generation

1var istanbul = require('istanbul');2var instrumenter = new istanbul.Instrumenter();3var fs = require('fs');4var path = require('path');5var src = fs.readFileSync(path.resolve(__dirname, 'test.js'), 'utf8');6var instrumented = instrumenter.instrumentSync(src, 'test.js');7console.log(instrumented);8fs.writeFileSync(path.resolve(__dirname, 'test.js'), instrumented, 'utf8');

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