KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use defaultWalker method in istanbul

Best JavaScript code snippet using istanbul

index.js

Source:index.js

1'use strict';2const Readable = require('stream').Readable;3const each = require('async-each');4const walkers = require('./walkers');5/**6 * Scans levels in file system.7 *8 * If file or directory is valid BEM entity then `add` will be called with info about this file.9 *10 * @param {string[]} levels                The paths to levels.11 * @param {object} options                 The options.12 * @param {object} options.levels          The level map. A key is path to a level,13 *                                         a value is an options object for this level.14 * @param {object} options.defaults        The options for levels by default.15 * @param {object} options.defaults.naming Any options for `@bem/naming`.16 * @param {string} options.defaults.scheme The name of level scheme. Available values: `flat` or `nested`.17 *18 * @returns {module:stream.Readable} stream with info about found files and directories.19 */20module.exports = (levels, options) => {21    options || (options = {});22    const defaults = options.defaults || {};23    const levelConfigs = options.levels || {};24    const defaultNaming = defaults.naming;25    const defaultWalker = (typeof defaults.scheme === 'string' ? walkers[defaults.scheme] : defaults.scheme)26        || walkers.nested;27    const output = new Readable({ objectMode: true, read: () => {} });28    const add = (obj) => output.push(obj);29    const scan = (level, callback) => {30        const config = levelConfigs[level];31        const scheme = config && config.scheme;32        const naming = config && config.naming || defaultNaming;33        const walk = typeof scheme === 'string' ? walkers[scheme] : (scheme || defaultWalker);34        walk({ path: level, naming: naming }, add, callback);35    };36    each(levels, scan, err => {37        err38            ? output.emit('error', err)39            : output.push(null);40    });41    return output;...

transpiler.js

Source:transpiler.js

1const jsYaml = require("js-yaml");2/**3 * noop walker to traverse and transform values.4 * @param {string} key5 * @param {any} value6 * @param {object} parent7 * @returns value8 */9const defaultWalker = (key, value, parent) => value;10/**11 * Plugable YAML -> JSON Transpiler12 */13class Transpiler {14  /**15   *16   * @param {string} yaml YAML format data17   * @param {function} walk18   */19  constructor(yaml, walk = defaultWalker) {20    this._json = null;21    this._object = null;22    this._yaml = yaml;23    this._walk = walk;24  }25  /**26   *27   * @returns {object} parsed YAML object28   */29  parse() {30    this._object = jsYaml.load(this._yaml);31    return this._object;32  }33  /**34   * traverse object recursively and apply waker function.35   * @param {void | object}36   * @returns37   */38  traverse(target = this._object) {39    for (var key in target) {40      if (target.hasOwnProperty(key)) {41        const value = this._walk(key, target[key], target);42        if (typeof value === "object") {43          return this.traverse(value);44        }45      }46    }47    return target;48  }49  /**50   * Return JSON format Data51   * @returns {string} Return JSON format Data52   */53  generate() {54    this._json = JSON.stringify(this._object, null, 2);55    return this._json;56  }57  toJSON() {58    return this._json;59  }60  transpile(format = "JSON") {61    this.parse();62    this.traverse();63    this.generate();64    if (format.toUpperCase() === "JSON") {65      return this.toJSON();66    } else {67      throw new Error(`Unrecognized format ${format}`);68    }69  }70}71module.exports.Transpiler = Transpiler;...

Using AI Code Generation

1var istanbul = require('istanbul');2var api = istanbul.api;3var collector = new istanbul.Collector();4var reporter = new istanbul.Reporter();5var defaultWalker = api.getDefaultWalker('js');6var opts = {7};8var callback = function (err, report) {9    if (err) {10        console.log('Error occurred: ', err);11        return;12    }13    console.log('Report: ', report);14};15var walker = defaultWalker('test.js', opts);16api.walkSync(walker, collector, reporter, sync, callback);17var istanbul = require('istanbul');18var api = istanbul.api;19var collector = new istanbul.Collector();20var reporter = new istanbul.Reporter();21var defaultWalker = api.getDefaultWalker('js');22var opts = {23};24var callback = function (err, report) {25    if (err) {26        console.log('Error occurred: ', err);27        return;28    }29    console.log('Report: ', report);30};31var walker = defaultWalker('test.js', opts);32api.walk(walker, collector, reporter, sync, callback);

Using AI Code Generation

1var istanbul = require('istanbul');2var defaultWalker = istanbul.utils.defaultWalker;3var esprima = require('esprima');4var fs = require('fs');5var myWalker = defaultWalker;6myWalker.on('FunctionDeclaration', function (node) {7    console.log(node);8});9var content = fs.readFileSync('test1.js', 'utf8');10var ast = esprima.parse(content);11istanbul.utils.traverse(ast, myWalker);

Using AI Code Generation

1var istanbul = require('istanbul');2var defaultWalker = istanbul.defaultWalker;3var walker = new defaultWalker();4var instrumenter = new istanbul.Instrumenter();5var fs = require('fs');6var esprima = require('esprima');7var escodegen = require('escodegen');8var escope = require('escope');9var estraverse = require('estraverse');10var path = require('path');11var esprimaOptions = {12};13var escodegenOptions = {14    format: {15        indent: {16        },17    },18    moz: {19    },20};21var code = fs.readFileSync('test.js', 'utf-8');22var ast = esprima.parse(code, esprimaOptions);23var scopeManager = escope.analyze(ast, {ecmaVersion: 6});24var instrumentedCode = instrumenter.instrumentSync(code, 'test.js');25var instrumentedAst = esprima.parse(instrumentedCode, esprimaOptions);26var instrumentedScopeManager = escope.analyze(instrumentedAst, {ecmaVersion: 6});27var instrumentedAst = instrumenter.instrumentSync(code, 'test.js');28var instrumentedAst = esprima.parse(instrumentedCode, esprimaOptions);29var instrumentedScopeManager = escope.analyze(instrumentedAst, {ecmaVersion: 6});30var instrumentedAst = instrumenter.instrumentSync(code, 'test.js');31var instrumentedAst = esprima.parse(instrumentedCode, esprimaOptions);32var instrumentedScopeManager = escope.analyze(instrumentedAst, {ecmaVersion: 6});

Using AI Code Generation

1var istanbul = require('istanbul');2var defaultWalker = istanbul.utils.defaultWalker;3var myWalker = function(node, callback) {4    if (node.type === 'FunctionDeclaration') {5        console.log(node);6    }7    defaultWalker(node, callback);8};9istanbul.utils.defaultWalker = myWalker;10var istanbul = require('istanbul');11var defaultWalker = istanbul.utils.defaultWalker;12var myWalker = function(node, callback) {13    if (node.type === 'FunctionDeclaration') {14        console.log(node);15    }16    defaultWalker(node, callback);17};18istanbul.utils.defaultWalker = myWalker;19var istanbul = require('istanbul');20var defaultWalker = istanbul.utils.defaultWalker;21var myWalker = function(node, callback) {22    if (node.type === 'FunctionDeclaration') {23        console.log(node);24    }25    defaultWalker(node, callback);26};27istanbul.utils.defaultWalker = myWalker;28var istanbul = require('istanbul');29var defaultWalker = istanbul.utils.defaultWalker;30var myWalker = function(node, callback) {31    if (node.type === 'FunctionDeclaration') {32        console.log(node);33    }34    defaultWalker(node, callback);35};36istanbul.utils.defaultWalker = myWalker;37var istanbul = require('istanbul');38var defaultWalker = istanbul.utils.defaultWalker;39var myWalker = function(node, callback) {40    if (node.type === 'FunctionDeclaration') {41        console.log(node);42    }43    defaultWalker(node, callback);44};45istanbul.utils.defaultWalker = myWalker;46var istanbul = require('istanbul');47var defaultWalker = istanbul.utils.defaultWalker;48var myWalker = function(node, callback) {49    if (node.type === 'FunctionDeclaration') {50        console.log(node);51    }52    defaultWalker(node, callback);53};54istanbul.utils.defaultWalker = myWalker;55var istanbul = require('istanbul');56var defaultWalker = istanbul.utils.defaultWalker;57var myWalker = function(node, callback)

Using AI Code Generation

1var istanbul = require('istanbul');2var defaultWalker = istanbul.getDefaultWalker();3var myWalker = {4    FunctionDeclaration: function(node) {5        console.log('FunctionDeclaration', node.id.name);6    }7};8istanbul.utils.merge(myWalker, defaultWalker);9console.log(myWalker);10var defaultParser = istanbul.getDefaultParser();11var myParser = {12    parse: function(code) {13        console.log('parse', code);14        return defaultParser.parse(code);15    }16};17istanbul.utils.merge(myParser, defaultParser);18console.log(myParser);19var defaultInstrumenter = istanbul.getDefaultInstrumenter();20var myInstrumenter = {21    instrumentSync: function(code, filename) {22        console.log('instrumentSync', code, filename);23        return defaultInstrumenter.instrumentSync(code, filename);24    }25};26istanbul.utils.merge(myInstrumenter, defaultInstrumenter);27console.log(myInstrumenter);28var defaultReporter = istanbul.getDefaultReporter();29var myReporter = {30    writeReport: function(collector, sync) {31        console.log('writeReport', collector, sync);32        return defaultReporter.writeReport(collector, sync);33    }34};35istanbul.utils.merge(myReporter, defaultReporter);36console.log(myReporter);37var defaultCollector = istanbul.getDefaultCollector();38var myCollector = {39    add: function(obj) {40        console.log('add', obj);41        return defaultCollector.add(obj);42    }43};44istanbul.utils.merge(myCollector, defaultCollector);45console.log(myCollector);46var defaultHook = istanbul.getDefaultHook();47var myHook = {48    hookRunInThisContext: function() {49        console.log('hookRunInThisContext');50        return defaultHook.hookRunInThisContext();51    }52};53istanbul.utils.merge(myHook, defaultHook);54console.log(myHook);55var defaultMatcher = istanbul.getDefaultMatcher();56var myMatcher = {57    matches: function(filename, patterns) {58        console.log('matches', filename, patterns);59        return defaultMatcher.matches(filename, patterns);60    }61};62istanbul.utils.merge(myMatcher

Using AI Code Generation

1import {defaultWalker} from 'istanbul-lib-instrument';2var a = 1;3var b = 2;4`;5const ast = acorn.parse(code, {ecmaVersion: 6});6const instrumenter = new Instrumenter();7const instrumentedCode = instrumenter.instrumentSync(code, 'test.js');8console.log(instrumentedCode);9console.log(ast);10const instrumentedAst = defaultWalker(ast, instrumenter);11console.log(instrumentedAst);12const instrumentedCode2 = instrumenter.lastSourceMap().toComment();13console.log(instrumentedCode2);

Using AI Code Generation

1var istanbul = require('istanbul');2var defaultWalker = istanbul.utils.defaultWalker;3var walker = defaultWalker();4walker.walk('test.js', function (node) {5    console.log(node);6});7{ type: 'Program',8  loc: { start: { line: 1, column: 0 }, end: { line: 4, column: 1 } },9   [ { type: 'FunctionDeclaration',10       expression: false },11     { type: 'EmptyStatement',12       loc: [Object] } ],13  sourceType: 'script' }14{ type: 'Program',15  loc: { start: { line: 1, column: 0 }, end: { line: 4, column: 1 } },16   [ { type: 'FunctionDeclaration',17       expression: false },18     { type: 'EmptyStatement',19       loc: [Object] } ],20  sourceType: 'script' }

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.