javascript-obfuscator/test/functional-tests/javascript-obfuscator/JavaScriptObfuscator.spec.ts

import { assert } from 'chai';

import { IObfuscationResult } from '../../../src/interfaces/IObfuscationResult';

import { JavaScriptObfuscator } from '../../../src/JavaScriptObfuscator';

import { NO_CUSTOM_NODES_PRESET } from '../../../src/options/presets/NoCustomNodes';

import { readFileAsString } from '../../helpers/readFileAsString';

import { RandomGeneratorUtils } from '../../../src/utils/RandomGeneratorUtils';

describe('JavaScriptObfuscator', () => {
    describe('obfuscate (sourceCode: string, customOptions?: IObfuscatorOptions): IObfuscationResult', () => {
        beforeEach(() => {
            RandomGeneratorUtils.initializeRandomGenerator(0);
        });

        describe('if `sourceMap` option is `false`', () => {
            it('should returns object with obfuscated code and empty source map', () => {
                let obfuscationResult: IObfuscationResult = JavaScriptObfuscator.obfuscate(
                    readFileAsString(__dirname + '/fixtures/simple-input-1.js'),
                    {
                        ...NO_CUSTOM_NODES_PRESET
                    }
                );

                assert.isOk(obfuscationResult.getObfuscatedCode());
                assert.isNotOk(obfuscationResult.getSourceMap());
            });
        });

        describe('if `sourceMap` option is `true`', () => {
            it('should returns object with obfuscated code and source map', () => {
                let obfuscationResult: IObfuscationResult = JavaScriptObfuscator.obfuscate(
                    readFileAsString(__dirname + '/fixtures/simple-input-1.js'),
                    {
                        ...NO_CUSTOM_NODES_PRESET,
                        sourceMap: true
                    }
                );

                assert.isOk(obfuscationResult.getObfuscatedCode());
                assert.isOk(JSON.parse(obfuscationResult.getSourceMap()).mappings);
            });

            it('should returns object with obfuscated code with inline source map as Base64 string', () => {
                let obfuscationResult: IObfuscationResult = JavaScriptObfuscator.obfuscate(
                    readFileAsString(__dirname + '/fixtures/simple-input-1.js'),
                    {
                        ...NO_CUSTOM_NODES_PRESET,
                        sourceMap: true,
                        sourceMapMode: 'inline'
                    }
                );

                assert.isOk(obfuscationResult.getObfuscatedCode());
                assert.match(
                    obfuscationResult.getObfuscatedCode(),
                    /sourceMappingURL=data:application\/json;base64/
                );
                assert.isOk(obfuscationResult.getSourceMap());
            });

            it('should returns object with empty obfuscated code and source map with empty data if source code is empty', () => {
                let obfuscationResult: IObfuscationResult = JavaScriptObfuscator.obfuscate(
                    readFileAsString(__dirname + '/fixtures/empty-input.js'),
                    {
                        sourceMap: true
                    }
                );

                assert.isNotOk(obfuscationResult.getObfuscatedCode());
                assert.deepEqual(JSON.parse(obfuscationResult.getSourceMap()).names, []);
                assert.deepEqual(JSON.parse(obfuscationResult.getSourceMap()).sources, []);
                assert.isNotOk(JSON.parse(obfuscationResult.getSourceMap()).mappings);
            });
        });

        it('should returns an empty string if source code is empty', () => {
            assert.isNotOk(
                JavaScriptObfuscator.obfuscate(
                    readFileAsString(__dirname + '/fixtures/empty-input.js'),
                ).getObfuscatedCode()
            );
        });

        it('should returns an empty string if source code contains only comments', () => {
            assert.isNotOk(
                JavaScriptObfuscator.obfuscate(
                    readFileAsString(__dirname + '/fixtures/comments-only.js'),
                ).getObfuscatedCode()
            );
        });

        it('should obfuscate simple code with variable inside global scope', () => {
            assert.match(
                JavaScriptObfuscator.obfuscate(
                    readFileAsString(__dirname + '/fixtures/simple-input-1.js'),
                    {
                        ...NO_CUSTOM_NODES_PRESET
                    }
                ).getObfuscatedCode(),
                /^var *test *= *0x\d+;$/
            );
        });

        it('should obfuscate simple code with variable inside block-scope', () => {
            assert.match(
                JavaScriptObfuscator.obfuscate(
                    readFileAsString(__dirname + '/fixtures/block-scope.js'),
                    {
                        ...NO_CUSTOM_NODES_PRESET
                    }
                ).getObfuscatedCode(),
                /^\(function *\(\) *\{ *var *_0x[\w]+ *= *0x\d+; *\}(\(\)\)|\)\(\));?$/
            );
        });

        it('should obfuscate simple code with latin literal variable value', () => {
            let stringArrayLatinRegExp: RegExp = /^var _0x(\w){4} *= *\['abc'\];/,
                stringArrayCallRegExp: RegExp = /var *test *= *_0x(\w){4}\('0x0'\);$/,
                obfuscatedCode1: string = JavaScriptObfuscator.obfuscate(
                    readFileAsString(__dirname + '/fixtures/simple-input-2.js'),
                    {
                        ...NO_CUSTOM_NODES_PRESET,
                        stringArray: true,
                        stringArrayThreshold: 1
                    }
                ).getObfuscatedCode();

            assert.match(obfuscatedCode1, stringArrayLatinRegExp);
            assert.match(obfuscatedCode1, stringArrayCallRegExp);
        });

        it('should obfuscate simple code with cyrillic literal variable value', () => {
            let stringArrayCyrillicRegExp: RegExp = /^var _0x(\w){4} *= *\['(\\u\d+)+'\];/,
                stringArrayCallRegExp: RegExp = /var *test *= *_0x(\w){4}\('0x0'\);$/,
                obfuscatedCode2: string = JavaScriptObfuscator.obfuscate(
                    readFileAsString(__dirname + '/fixtures/simple-input-cyrillic.js'),
                    {
                        ...NO_CUSTOM_NODES_PRESET,
                        stringArray: true,
                        stringArrayThreshold: 1
                    }
                ).getObfuscatedCode();

            assert.match(obfuscatedCode2, stringArrayCyrillicRegExp);
            assert.match(obfuscatedCode2, stringArrayCallRegExp);
        });

        it('should returns same code every time with same `seed`', function () {
            this.timeout(60000);

            const code: string = readFileAsString('./test/fixtures/sample.js');
            const samples: number = 100;

            let seed: number = 12345,
                equalsCount: number = 0;

            for (let i: number = 0; i < samples; i++) {
                if (i % 20 === 0) {
                    seed++;
                }

                const obfuscationResult1: IObfuscationResult = JavaScriptObfuscator.obfuscate(
                    code, { seed: seed }
                );
                const obfuscationResult2: IObfuscationResult = JavaScriptObfuscator.obfuscate(
                    code, { seed: seed }
                );

                if (obfuscationResult1.getObfuscatedCode() === obfuscationResult2.getObfuscatedCode()) {
                    equalsCount++;
                }
            }

            assert.equal(equalsCount, samples);
        });

        it('should returns different code with different `seed` option value', () => {
            const code: string = readFileAsString('./test/fixtures/sample.js');

            const obfuscationResult1: IObfuscationResult = JavaScriptObfuscator.obfuscate(
                code, { seed: 12345 }
            );
            const obfuscationResult2: IObfuscationResult = JavaScriptObfuscator.obfuscate(
                code, { seed: 12346 }
            );

            const obfuscationResult3: IObfuscationResult = JavaScriptObfuscator.obfuscate(
                code, { seed: 0 }
            );
            const obfuscationResult4: IObfuscationResult = JavaScriptObfuscator.obfuscate(
                code, { seed: 0 }
            );

            assert.notEqual(obfuscationResult1.getObfuscatedCode(), obfuscationResult2.getObfuscatedCode());
            assert.notEqual(obfuscationResult3.getObfuscatedCode(), obfuscationResult4.getObfuscatedCode());
        });

        it('should keep new.target MetaProperty', () => {
            assert.match(
                JavaScriptObfuscator.obfuscate(
                    readFileAsString(__dirname + '/fixtures/new-target.js'),
                    {
                        ...NO_CUSTOM_NODES_PRESET
                    }
                ).getObfuscatedCode(),
                /new\.target *=== *Foo/
            );
        });

        it('should mangle obfuscated code', () => {
            const code: string = readFileAsString(__dirname + '/fixtures/mangle.js');

            const obfuscationResult1: IObfuscationResult = JavaScriptObfuscator.obfuscate(
                code, { mangle: true }
            );
            const mangleMatch: RegExp = /var *a *= *0x1/;

            assert.match(obfuscationResult1.getObfuscatedCode(), mangleMatch);
        });

        afterEach(() => {
            RandomGeneratorUtils.initializeRandomGenerator(0);
        });
    });
});