voluptasvelit/test/functional-tests/node-transformers/obfuscating-transformers/function-transformer/FunctionTransformer.spec.ts

JavaScript obfuscator

import { assert } from 'chai';

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

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

import { JavaScriptObfuscator } from '../../../../../src/JavaScriptObfuscatorFacade';
import { getRegExpMatch } from '../../../../helpers/getRegExpMatch';

describe('FunctionTransformer', () => {
    describe('identifiers transformation inside `FunctionDeclaration` and `FunctionExpression` node body', () => {
        const functionParamIdentifierRegExp: RegExp = /var _0x[a-f0-9]{4,6} *= *function *\((_0x[a-f0-9]{4,6})\) *\{/;
        const functionBodyIdentifierRegExp: RegExp = /console\['log'\]\((_0x[a-f0-9]{4,6})\)/;
        const variableRegExp: RegExp = /variable *= *0x6;/;

        let obfuscatedCode: string,
            functionParamIdentifierName: string,
            functionBodyIdentifierName: string;

        before(() => {
            const code: string = readFileAsString(__dirname + '/fixtures/input.js');

            obfuscatedCode = JavaScriptObfuscator.obfuscate(
                code,
                {
                    ...NO_ADDITIONAL_NODES_PRESET
                }
            ).getObfuscatedCode();

            const functionParamIdentifierMatch: RegExpMatchArray|null = obfuscatedCode
                .match(functionParamIdentifierRegExp);
            const functionBodyIdentifierMatch: RegExpMatchArray|null = obfuscatedCode
                .match(functionBodyIdentifierRegExp);

            functionParamIdentifierName = (<RegExpMatchArray>functionParamIdentifierMatch)[1];
            functionBodyIdentifierName = (<RegExpMatchArray>functionBodyIdentifierMatch)[1];
        });

        it('should correctly transform both function parameter identifier and function body identifier with same name', () => {
            assert.equal(functionParamIdentifierName, functionBodyIdentifierName);
        });

        it('shouldn\'t transform other variables in function body', () => {
            assert.match(obfuscatedCode, variableRegExp);
        });
    });

    describe('function id name obfuscation', () => {
        describe('Variant #1', () => {
            const functionExpressionParamIdentifierRegExp: RegExp = /\(function *\((_0x[a-f0-9]{4,6})\) *\{/;
            const functionParamIdentifierRegExp: RegExp = /function *(_0x[a-f0-9]{4,6}) *\(\) *\{/;
            const functionObjectIdentifierRegExp: RegExp = /return new (_0x[a-f0-9]{4,6}) *\(\);/;

            let obfuscatedCode: string,
                functionExpressionParamIdentifierName: string,
                functionParamIdentifierName: string,
                functionObjectIdentifierName: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/function-id-name-1.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();

                const functionExpressionParamIdentifierMatch: RegExpMatchArray|null = obfuscatedCode
                    .match(functionExpressionParamIdentifierRegExp);
                const functionParamIdentifierMatch: RegExpMatchArray|null = obfuscatedCode
                    .match(functionParamIdentifierRegExp);
                const functionObjectIdentifierMatch: RegExpMatchArray|null = obfuscatedCode
                    .match(functionObjectIdentifierRegExp);

                functionParamIdentifierName = (<RegExpMatchArray>functionParamIdentifierMatch)[1];
                functionExpressionParamIdentifierName = (<RegExpMatchArray>functionExpressionParamIdentifierMatch)[1];
                functionObjectIdentifierName = (<RegExpMatchArray>functionObjectIdentifierMatch)[1];
            });

            it('should correctly transform function expression parameter identifier', () => {
                assert.match(obfuscatedCode, functionExpressionParamIdentifierRegExp);
            });

            it('should correctly transform function parameter identifier', () => {
                assert.match(obfuscatedCode, functionParamIdentifierRegExp);
            });

            it('should correctly transform function object parameter identifier', () => {
                assert.match(obfuscatedCode, functionObjectIdentifierRegExp);
            });

            it('should generate same names for function parameter and function object identifiers', () => {
                assert.equal(functionParamIdentifierName, functionObjectIdentifierName);
            });

            it('should generate same names for function parameter identifiers', () => {
                assert.equal(functionExpressionParamIdentifierName, functionParamIdentifierName);
            });

            it('should generate same names for function expression parameter and function object identifiers', () => {
                assert.equal(functionExpressionParamIdentifierName, functionObjectIdentifierName);
            });
        });

        describe('Variant #2', () => {
            const functionIdentifiersRegExp: RegExp = /function *(_0x[a-f0-9]{4,6}) *\((_0x[a-f0-9]{4,6})\) *\{/;
            const functionObjectIdentifierRegExp: RegExp = /return new (_0x[a-f0-9]{4,6}) *\(\);/;

            let obfuscatedCode: string,
                functionIdentifierName: string,
                functionParamIdentifierName: string,
                functionObjectIdentifierName: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/function-id-name-2.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();

                const functionIdentifiersMatch: RegExpMatchArray|null = obfuscatedCode
                    .match(functionIdentifiersRegExp);
                const functionObjectIdentifierMatch: RegExpMatchArray|null = obfuscatedCode
                    .match(functionObjectIdentifierRegExp);

                functionIdentifierName = (<RegExpMatchArray>functionIdentifiersMatch)[1];
                functionParamIdentifierName = (<RegExpMatchArray>functionIdentifiersMatch)[2];
                functionObjectIdentifierName = (<RegExpMatchArray>functionObjectIdentifierMatch)[1];
            });

            it('should correctly transform function identifiers', () => {
                assert.match(obfuscatedCode, functionIdentifiersRegExp);
            });

            it('should correctly transform function object parameter identifier', () => {
                assert.match(obfuscatedCode, functionObjectIdentifierRegExp);
            });

            it('should generate same names for function id and function object identifiers', () => {
                assert.equal(functionIdentifierName, functionObjectIdentifierName);
            });

            it('should generate same names for function id and parameter identifiers', () => {
                assert.equal(functionIdentifierName, functionParamIdentifierName);
            });
        });

        describe('Variant #3: global function declaration identifier', () => {
            describe('Variant #1: `renameGlobals` option is disabled', () => {
                const functionIdentifiersRegExp: RegExp = /function *(foo) *\((_0x[a-f0-9]{4,6})\) *\{/;
                const functionObjectIdentifierRegExp: RegExp = /new (foo) *\(\);/;

                let obfuscatedCode: string,
                    functionIdentifierName: string,
                    functionParamIdentifierName: string,
                    functionObjectIdentifierName: string;

                before(() => {
                    const code: string = readFileAsString(__dirname + '/fixtures/function-id-name-3.js');

                    obfuscatedCode = JavaScriptObfuscator.obfuscate(
                        code,
                        {
                            ...NO_ADDITIONAL_NODES_PRESET,
                            renameGlobals: false
                        }
                    ).getObfuscatedCode();

                    const functionIdentifiersMatch: RegExpMatchArray|null = obfuscatedCode
                        .match(functionIdentifiersRegExp);
                    const functionObjectIdentifierMatch: RegExpMatchArray|null = obfuscatedCode
                        .match(functionObjectIdentifierRegExp);

                    functionIdentifierName = (<RegExpMatchArray>functionIdentifiersMatch)[1];
                    functionParamIdentifierName = (<RegExpMatchArray>functionIdentifiersMatch)[2];
                    functionObjectIdentifierName = (<RegExpMatchArray>functionObjectIdentifierMatch)[1];
                });

                it('should correctly transform function identifiers', () => {
                    assert.match(obfuscatedCode, functionIdentifiersRegExp);
                });

                it('should correctly transform function object parameter identifier', () => {
                    assert.match(obfuscatedCode, functionObjectIdentifierRegExp);
                });

                it('should generate same names for function id and function object identifiers', () => {
                    assert.equal(functionIdentifierName, functionObjectIdentifierName);
                });

                it('should generate different names for function parameter and function object identifiers', () => {
                    assert.notEqual(functionParamIdentifierName, functionObjectIdentifierName);
                });

                it('should generate different names for function id and parameter identifiers', () => {
                    assert.notEqual(functionIdentifierName, functionParamIdentifierName);
                });
            });

            describe('Variant #2: `renameGlobals` option is enabled', () => {
                const functionIdentifiersRegExp: RegExp = /function *(_0x[a-f0-9]{4,6}) *\((_0x[a-f0-9]{4,6})\) *\{/;
                const functionObjectIdentifierRegExp: RegExp = /new (_0x[a-f0-9]{4,6}) *\(\);/;

                let obfuscatedCode: string,
                    functionIdentifierName: string,
                    functionParamIdentifierName: string,
                    functionObjectIdentifierName: string;

                before(() => {
                    const code: string = readFileAsString(__dirname + '/fixtures/function-id-name-3.js');

                    obfuscatedCode = JavaScriptObfuscator.obfuscate(
                        code,
                        {
                            ...NO_ADDITIONAL_NODES_PRESET,
                            renameGlobals: true
                        }
                    ).getObfuscatedCode();

                    const functionIdentifiersMatch: RegExpMatchArray|null = obfuscatedCode
                        .match(functionIdentifiersRegExp);
                    const functionObjectIdentifierMatch: RegExpMatchArray|null = obfuscatedCode
                        .match(functionObjectIdentifierRegExp);

                    functionIdentifierName = (<RegExpMatchArray>functionIdentifiersMatch)[1];
                    functionParamIdentifierName = (<RegExpMatchArray>functionIdentifiersMatch)[2];
                    functionObjectIdentifierName = (<RegExpMatchArray>functionObjectIdentifierMatch)[1];
                });

                it('should correctly transform function identifiers', () => {
                    assert.match(obfuscatedCode, functionIdentifiersRegExp);
                });

                it('should correctly transform function object parameter identifier', () => {
                    assert.match(obfuscatedCode, functionObjectIdentifierRegExp);
                });

                it('should generate same names for function id and function object identifiers', () => {
                    assert.equal(functionIdentifierName, functionObjectIdentifierName);
                });

                it('should generate same names for function parameter and function object identifiers', () => {
                    assert.equal(functionParamIdentifierName, functionObjectIdentifierName);
                });

                it('should generate same names for function id and parameter identifiers', () => {
                    assert.equal(functionIdentifierName, functionParamIdentifierName);
                });
            });
        });
    });

    describe('object pattern as parameter', () => {
        describe('Variant #1: simple', () => {
            const functionParameterRegExp: RegExp = /function *\(\{ *bar *\}\) *\{/;
            const functionBodyRegExp: RegExp = /return *bar;/;

            let obfuscatedCode: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/object-pattern-as-parameter-1.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();
            });

            it('match #1: shouldn\'t transform function parameter object pattern identifier', () => {
                assert.match(obfuscatedCode, functionParameterRegExp);
            });

            it('match #2: shouldn\'t transform function parameter object pattern identifier', () => {
                assert.match(obfuscatedCode, functionBodyRegExp);
            });
        });

        describe('Variant #2: correct transformation when identifier with same name in parent scope exist', () => {
            const functionParameterRegExp: RegExp = /^\(function *\(\) *{ *function *_0x[a-f0-9]{4,6} *\(_0x[a-f0-9]{4,6}\) *\{/;
            const callbackParameterRegExp: RegExp = /\['then'] *\(\({ *data *}\)/;
            const callbackBodyRegExp: RegExp = /console\['log']\(data\)/;
            const returnRegExp: RegExp = /return _0x[a-f0-9]{4,6};/;

            let obfuscatedCode: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/object-pattern-as-parameter-2.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();
            });

            it('match #1: should transform function parameter identifier', () => {
                assert.match(obfuscatedCode, functionParameterRegExp);
            });

            it('match #2: shouldn\'t transform callback parameter object pattern identifier', () => {
                assert.match(obfuscatedCode, callbackParameterRegExp);
            });

            it('match #3: shouldn\'t transform callback body identifier', () => {
                assert.match(obfuscatedCode, callbackBodyRegExp);
            });

            it('match #4: should transform identifier in `ReturnStatement`', () => {
                assert.match(obfuscatedCode, returnRegExp);
            });
        });

        describe('Variant #3: correct transformation when parent scope identifier conflicts with current scope object pattern identifier', () => {
            const functionObjectPatternParameterRegExp1: RegExp = /function _0x[a-f0-9]{4,6} *\({data, *\.\.\._0x[a-f0-9]{4,6}}\) *{/;
            const functionObjectPatternParameterRegExp2: RegExp = /function _0x[a-f0-9]{4,6} *\({options}\) *{/;
            const returnRegExp1: RegExp = /return data *\+ *options *\+ *_0x[a-f0-9]{4,6};/;
            const returnRegExp2: RegExp = /return _0x[a-f0-9]{4,6};/;

            let obfuscatedCode: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/object-pattern-as-parameter-3.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();
            });

            it('match #1: should transform function parameter object pattern rest identifier', () => {
                assert.match(obfuscatedCode, functionObjectPatternParameterRegExp1);
            });

            it('match #2: should transform function parameter object pattern rest identifier', () => {
                assert.match(obfuscatedCode, functionObjectPatternParameterRegExp2);
            });

            it('match #3: should transform identifier in `ReturnStatement` of inner function', () => {
                assert.match(obfuscatedCode, returnRegExp1);
            });

            it('match #4: should transform identifier in `ReturnStatement` of outer function', () => {
                assert.match(obfuscatedCode, returnRegExp2);
            });
        });

        describe('Variant #4: shorthand property node', () => {
            const functionObjectPatternParameterRegExp1: RegExp = /function _0x[a-f0-9]{4,6} *\({id}\) *{/;
            const functionObjectPatternParameterRegExp2: RegExp = /function _0x[a-f0-9]{4,6} *\({id: *_0x[a-f0-9]{4,6}}\) *{/;
            const consoleLogRegExp: RegExp = /console\['log']\(id\);/;
            const returnRegExp: RegExp = /return id *\+ *_0x[a-f0-9]{4,6};/;

            let obfuscatedCode: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/object-pattern-as-parameter-4.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();
            });

            it('match #1: should transform function parameter object pattern rest identifier', () => {
                assert.match(obfuscatedCode, functionObjectPatternParameterRegExp1);
            });

            it('match #2: should transform function parameter object pattern rest identifier', () => {
                assert.match(obfuscatedCode, functionObjectPatternParameterRegExp2);
            });

            it('match #3: should transform identifier in `console.log` of outer function', () => {
                assert.match(obfuscatedCode, consoleLogRegExp);
            });

            it('match #4: should transform identifier in `ReturnStatement` of inner function', () => {
                assert.match(obfuscatedCode, returnRegExp);
            });
        });
    });

    describe('assignment pattern as parameter', () => {
        describe('Variant #1: literal as right value', () => {
            const functionParameterRegExp: RegExp = /function *\(_0x[a-f0-9]{4,6} *= *0x1\) *\{/;
            const functionBodyRegExp: RegExp = /return *_0x[a-f0-9]{4,6};/;

            let obfuscatedCode: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/assignment-pattern-as-parameter-1.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();
            });

            it('match #1: should transform function parameter assignment pattern identifier', () => {
                assert.match(obfuscatedCode, functionParameterRegExp);
            });

            it('match #2: should transform function parameter assignment pattern identifier', () => {
                assert.match(obfuscatedCode, functionBodyRegExp);
            });
        });

        describe('Variant #2: identifier as right value', () => {
            const variableDeclarationRegExp: RegExp = /var *(_0x[a-f0-9]{4,6}) *= *0x1;/;
            const functionParameterRegExp: RegExp = /function *\((_0x[a-f0-9]{4,6}) *= *(_0x[a-f0-9]{4,6})\) *\{/;
            const functionBodyRegExp: RegExp = /return *(_0x[a-f0-9]{4,6});/;

            let obfuscatedCode: string,
                variableDeclarationIdentifierName: string,
                functionParameterIdentifierName: string,
                functionDefaultParameterIdentifierName: string,
                functionBodyIdentifierName: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/assignment-pattern-as-parameter-2.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();
                variableDeclarationIdentifierName = getRegExpMatch(obfuscatedCode, variableDeclarationRegExp);
                functionParameterIdentifierName = getRegExpMatch(obfuscatedCode, functionParameterRegExp);
                functionDefaultParameterIdentifierName = getRegExpMatch(obfuscatedCode, functionParameterRegExp, 1);
                functionBodyIdentifierName = getRegExpMatch(obfuscatedCode, functionBodyRegExp);
            });

            it('match #1: should transform function parameter assignment pattern identifier', () => {
                assert.match(obfuscatedCode, variableDeclarationRegExp);
            });

            it('match #2: should transform function parameter assignment pattern identifier', () => {
                assert.match(obfuscatedCode, functionParameterRegExp);
            });

            it('match #3: should transform function parameter assignment pattern identifier', () => {
                assert.match(obfuscatedCode, functionBodyRegExp);
            });

            it('should keep same names for identifier in variable declaration and default value identifier of function parameter', () => {
                assert.equal(variableDeclarationIdentifierName, functionDefaultParameterIdentifierName);
            });

            it('should keep same names for identifiers in function params and function body', () => {
                assert.equal(functionParameterIdentifierName, functionBodyIdentifierName);
            });
        });

        describe('Variant #3: identifier as right value', () => {
            const variableDeclarationRegExp: RegExp = /var *(_0x[a-f0-9]{4,6}) *= *0x1;/;
            const functionParameterRegExp: RegExp = /function *\((_0x[a-f0-9]{4,6}), *(_0x[a-f0-9]{4,6}) *= *(_0x[a-f0-9]{4,6})\) *\{/;
            const functionBodyRegExp: RegExp = /return *(_0x[a-f0-9]{4,6}) *\+ *(_0x[a-f0-9]{4,6});/;

            let obfuscatedCode: string,
                variableDeclarationIdentifierName: string,
                functionParameterIdentifierName: string,
                functionDefaultParameterIdentifierName1: string,
                functionDefaultParameterIdentifierName2: string,
                functionBodyIdentifierName1: string,
                functionBodyIdentifierName2: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/assignment-pattern-as-parameter-3.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();

                variableDeclarationIdentifierName = getRegExpMatch(obfuscatedCode, variableDeclarationRegExp);
                functionParameterIdentifierName = getRegExpMatch(obfuscatedCode, functionParameterRegExp);
                functionDefaultParameterIdentifierName1 = getRegExpMatch(obfuscatedCode, functionParameterRegExp, 1);
                functionDefaultParameterIdentifierName2 = getRegExpMatch(obfuscatedCode, functionParameterRegExp, 2);

                functionBodyIdentifierName1 = getRegExpMatch(obfuscatedCode, functionBodyRegExp);
                functionBodyIdentifierName2 = getRegExpMatch(obfuscatedCode, functionBodyRegExp, 1);
            });

            it('match #1: should transform function parameter assignment pattern identifier', () => {
                assert.match(obfuscatedCode, variableDeclarationRegExp);
            });

            it('match #2: should transform function parameter assignment pattern identifier', () => {
                assert.match(obfuscatedCode, functionParameterRegExp);
            });

            it('match #3: should transform function parameter assignment pattern identifier', () => {
                assert.match(obfuscatedCode, functionBodyRegExp);
            });

            it('equal #1: should keep same names for variable declaration identifier and function parameters identifiers', () => {
                assert.equal(variableDeclarationIdentifierName, functionParameterIdentifierName);
            });

            it('equal #2: shouldn\'t keep same names for variable declaration identifier and function parameters identifiers', () => {
                assert.notEqual(variableDeclarationIdentifierName, functionDefaultParameterIdentifierName1);
            });

            it('equal #3: should keep same names for variable declaration identifier and function parameters identifiers', () => {
                assert.equal(variableDeclarationIdentifierName, functionDefaultParameterIdentifierName2);
            });

            it('equal #4: should keep same names for identifier in first function parameter and default value identifier of second function parameter', () => {
                assert.equal(functionParameterIdentifierName, functionDefaultParameterIdentifierName2);
            });

            it('equal #5: should keep same names for identifiers in function params and function body', () => {
                assert.equal(functionParameterIdentifierName, functionBodyIdentifierName1);
            });

            it('equal #6: should keep same names for identifiers in function params and function body', () => {
                assert.equal(functionDefaultParameterIdentifierName1, functionBodyIdentifierName2);
            });
        });
    });

    describe('array pattern as parameter', () => {
        const functionParameterRegExp: RegExp = /function *\(\[(_0x[a-f0-9]{4,6}), *(_0x[a-f0-9]{4,6})\]\) *\{/;
        const functionBodyRegExp: RegExp = /return *(_0x[a-f0-9]{4,6}) *\+ *(_0x[a-f0-9]{4,6});/;

        let arrayPatternIdentifierName1: string,
            arrayPatternIdentifierName2: string,
            functionBodyIdentifierName1: string,
            functionBodyIdentifierName2: string;

        before(() => {
            const code: string = readFileAsString(__dirname + '/fixtures/array-pattern-as-parameter.js');

            const obfuscatedCode: string = JavaScriptObfuscator.obfuscate(
                code,
                {
                    ...NO_ADDITIONAL_NODES_PRESET
                }
            ).getObfuscatedCode();

            arrayPatternIdentifierName1 = getRegExpMatch(obfuscatedCode, functionParameterRegExp);
            arrayPatternIdentifierName2 = getRegExpMatch(obfuscatedCode, functionParameterRegExp, 1);
            functionBodyIdentifierName1 = getRegExpMatch(obfuscatedCode, functionBodyRegExp);
            functionBodyIdentifierName2 = getRegExpMatch(obfuscatedCode, functionBodyRegExp, 1);
        });

        it('equal #1: should keep same names for identifiers in function parameter array pattern and function body', () => {
            assert.equal(arrayPatternIdentifierName1, functionBodyIdentifierName1);
        });

        it('equal #2: should keep same names for identifiers in function parameter array pattern and function body', () => {
            assert.equal(arrayPatternIdentifierName2, functionBodyIdentifierName2);
        });
    });

    describe('rest parameters', () => {
        const functionRegExp: RegExp = /function *func *\(_0x[a-f0-9]{4,6}, *..._0x[a-f0-9]{4,6}\) *\{/;
        const returnRegExp: RegExp = /return *_0x[a-f0-9]{4,6} *\+ *_0x[a-f0-9]{4,6};/;

        let obfuscatedCode: string;

        before(() => {
            const code: string = readFileAsString(__dirname + '/fixtures/rest-parameter.js');

            obfuscatedCode = JavaScriptObfuscator.obfuscate(
                code,
                {
                    ...NO_ADDITIONAL_NODES_PRESET
                }
            ).getObfuscatedCode();
        });

        it('Match #1: should transform function rest parameter', () => {
            assert.match(obfuscatedCode, functionRegExp);
        });

        it('Match #2: should transform identifiers inside function body', () => {
            assert.match(obfuscatedCode, returnRegExp);
        });
    });

    describe('array rest parameter', () => {
        const functionRegExp: RegExp = /function *func *\(\[_0x[a-f0-9]{4,6}, *..._0x[a-f0-9]{4,6}\]\) *\{/;
        const returnRegExp: RegExp = /return *_0x[a-f0-9]{4,6} *\+ *_0x[a-f0-9]{4,6};/;

        let obfuscatedCode: string;

        before(() => {
            const code: string = readFileAsString(__dirname + '/fixtures/array-rest-parameter.js');

            obfuscatedCode = JavaScriptObfuscator.obfuscate(
                code,
                {
                    ...NO_ADDITIONAL_NODES_PRESET
                }
            ).getObfuscatedCode();
        });

        it('Match #1: should transform function rest parameter', () => {
            assert.match(obfuscatedCode, functionRegExp);
        });

        it('Match #2: should transform identifiers inside function body', () => {
            assert.match(obfuscatedCode, returnRegExp);
        });
    });

    describe('object rest parameter', () => {
        const functionRegExp: RegExp = /function *func *\(\{foo, *..._0x[a-f0-9]{4,6}\}\) *\{/;
        const returnRegExp: RegExp = /return *foo *\+ *_0x[a-f0-9]{4,6};/;

        let obfuscatedCode: string;

        before(() => {
            const code: string = readFileAsString(__dirname + '/fixtures/object-rest-parameter.js');

            obfuscatedCode = JavaScriptObfuscator.obfuscate(
                code,
                {
                    ...NO_ADDITIONAL_NODES_PRESET
                }
            ).getObfuscatedCode();
        });

        it('Match #1: should transform function rest parameter', () => {
            assert.match(obfuscatedCode, functionRegExp);
        });

        it('Match #2: should transform identifiers inside function body', () => {
            assert.match(obfuscatedCode, returnRegExp);
        });
    });

    describe('ignored identifier names set', () => {
        describe('Variant #1: avoid to add `ObjectPattern` identifier to the set when same identifier exist in function parameter', () => {
            const functionBodyRegExp: RegExp = /\[]\['find']\(\({bar: *_0x[a-f0-9]{4,6}}\) *=> *_0x[a-f0-9]{4,6}\);/;

            let obfuscatedCode: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/identifier-names-set-object-pattern.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();
            });

            it('should transform identifiers in function body', () => {
                assert.match(obfuscatedCode, functionBodyRegExp);
            });
        });
    });

    describe('correct block scope detection of arrow function expression', () => {
        describe('Variant #1: block statement body', () => {
            const regExpMatch: string = `` +
                `\\[]` +
                `\\['map']\\(_0x[a-f0-9]{4,6} *=> *\\{ *return 0x1; *\\}\\)` +
                `\\['map']\\(_0x[a-f0-9]{4,6} *=> *\\[foo]\\);` +
            ``;
            const regExp: RegExp = new RegExp(regExpMatch);

            let obfuscatedCode: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/arrow-function-with-expression-body-block-scope-detection-1.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();
            });

            it('should transform identifiers in arrow function expression body', () => {
                assert.match(obfuscatedCode, regExp);
            });
        });

        describe('Variant #2: expression statement body', () => {
            const regExpMatch: string = `` +
                `\\[]` +
                `\\['map']\\(_0x[a-f0-9]{4,6} *=> *0x1\\)` +
                `\\['map']\\(_0x[a-f0-9]{4,6} *=> *\\[foo]\\);` +
            ``;
            const regExp: RegExp = new RegExp(regExpMatch);

            let obfuscatedCode: string;

            before(() => {
                const code: string = readFileAsString(__dirname + '/fixtures/arrow-function-with-expression-body-block-scope-detection-2.js');

                obfuscatedCode = JavaScriptObfuscator.obfuscate(
                    code,
                    {
                        ...NO_ADDITIONAL_NODES_PRESET
                    }
                ).getObfuscatedCode();
            });

            it('should transform identifiers in arrow function expression body', () => {
                assert.match(obfuscatedCode, regExp);
            });
        });
    });
});