shift-interpreter/dist/test/evaluation/unary-expressions.test.js

Shift-interpreter is an experimental JavaScript meta-interpreter useful for reverse engineering and analysis. One notable difference from other projects is that shift-interpreter retains state over an entire script but can be fed expressions and statement

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const util_1 = require("../util");
const operators = [
    '+',
    '-',
    '!',
    '~',
    'typeof',
    'void',
];
// const specialOps = ['in' , 'instanceof'];
describe('UnaryExpressions', () => {
    it('should evaluate operators the same as the host environment', () => {
        const operands = [2, 120, 1981, '2', 'hi', NaN, true, false, {}, 1 / 0];
        const results = operators.flatMap(op => operands.map(oper => util_1.compare(`${op} ${JSON.stringify(oper)}`)));
        results.forEach(result => util_1.assertResult(result));
    });
    it('should evaluate typeof on an undeclared variable', () => {
        util_1.assertResult(util_1.compare(`typeof foo`));
    });
    it('should propagate thrown errors', () => {
        util_1.assertResult(util_1.compare(`try {!(() => n++)();'bad';} catch (e) {'good';}`));
    });
    it('should not swallow continues/breaks', () => {
        util_1.assertResult(util_1.compare(`do{if(!null)continue; nonexistant();}while(i = 0);i`));
    });
});
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