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How to use hookCreateScript method in istanbul

Best JavaScript code snippet using istanbul

hook.js

...128 *  `vm.createScript`. Should return the transformed code.129 * @param options {Object} options Optional.130 * @param {Boolean} [options.verbose] write a line to standard error every time the transformer is called131 */132function hookCreateScript(matcher, transformer, opts) {133    opts = opts || {};134    var fn = transformFn(matcher, transformer, opts.verbose);135    vm.createScript = function (code, file) {136        var ret = fn(code, file);137        return originalCreateScript(ret.code, file);138    };139}140/**141 * unhooks vm.createScript, restoring it to its original state.142 * @method unhookCreateScript143 * @static144 */145function unhookCreateScript() {146    vm.createScript = originalCreateScript;147}148/**149 * hooks `vm.runInThisContext` to return transformed code.150 * @method hookRunInThisContext151 * @static152 * @param matcher {Function(filePath)} a function that is called with the filename passed to `vm.createScript`153 *  Should return a truthy value when transformations need to be applied to the code, a falsy value otherwise154 * @param transformer {Function(code, filePath)} a function called with the original code and the filename passed to155 *  `vm.createScript`. Should return the transformed code.156 * @param options {Object} options Optional.157 * @param {Boolean} [options.verbose] write a line to standard error every time the transformer is called158 */159function hookRunInThisContext(matcher, transformer, opts) {...

test_istanbul-lib-hook.js

Source: test_istanbul-lib-hook.js

...15	extensions: ['.js'],16	postLoadHook: (filename: string) => {}17});18retVal();19hookCreateScript(matcher, transformer, {});20hookCreateScript(matcher, transformer, { verbose: true });21unhookCreateScript();22hookRunInThisContext(matcher, transformer, {});23hookRunInThisContext(matcher, transformer, { verbose: true });24unhookRunInThisContext();...

Using AI Code Generation

1var istanbul = require('istanbul');2var instrumenter = new istanbul.Instrumenter();3var hook = istanbul.hook;4hook.hookCreateScript(instrumenter.instrumentSync.bind(instrumenter));5var codeToInstrument = "var a = 1; var b = 2; var c = a + b;";6var instrumentedCode = instrumenter.instrumentSync(codeToInstrument, 'test.js');7console.log(instrumentedCode);8hook.unhookCreateScript();9var instrumentedCodeWithoutHook = instrumenter.instrumentSync(codeToInstrument, 'test.js');10console.log(instrumentedCodeWithoutHook);11var a = 1; var b = 2; var c = a + b;var a = 1; var b = 2; var c = a + b;

Using AI Code Generation

1var assert = require('assert');2var a = 1;3assert.equal(a, 1);4console.log('test.js is executed');5var assert = require('assert');6var a = 2;7assert.equal(a, 2);8console.log('test2.js is executed');9var assert = require('assert');10var a = 3;11assert.equal(a, 3);12console.log('test3.js is executed');13var assert = require('assert');14var a = 4;15assert.equal(a, 4);16console.log('test4.js is executed');17var assert = require('assert');18var a = 5;19assert.equal(a, 5);20console.log('test5.js is executed');21console.log('test6.js is executed');22console.log('test7.js is executed');23console.log('test8.js is executed');24console.log('test9.js is executed');25console.log('test10.js is executed');26console.log('test11.js is executed');27console.log('test12.js is executed');28console.log('test13.js is executed');29console.log('test14.js is executed');30console.log('test15.js is executed');31console.log('test16.js is executed');32console.log('test17.js is executed');33console.log('test18.js is executed');34console.log('test19.js is executed');35console.log('test20.js is executed');36console.log('test21.js is executed');

Using AI Code Generation

1var istanbul = require('istanbul');2var instrumenter = new istanbul.Instrumenter();3var hook = istanbul.hook;4hook.hookCreateScript(instrumenter.instrumentSync.bind(instrumenter));5require('./src.js');6function add(a, b) {7  return a + b;8}9add(1, 2);10{11  "path/to/test.js": {12    "path/to/src.js": {13      "path/to/src.js": {14        "s": {15        },16        "b": {},17        "f": {18        },19        "fnMap": {20          "1": {21            "loc": {22              "start": {23              },24              "end": {25              }26            }27          },28          "2": {29            "name": "(anonymous_2)",30            "loc": {31              "start": {32              },33              "end": {34              }35            }36          }37        },38        "statementMap": {39          "1": {40            "start": {41            },42            "end": {43            }44          },45          "2": {46            "start": {47            },48            "end": {49            }50          },51          "3": {52            "start": {53            },54            "end": {55            }56          },57          "4": {

Blogs

Check out the latest blogs from LambdaTest on this topic:

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Automation Testing Tutorials

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