shift-interpreter/dist/test/evaluation/binary-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 = [
    '==',
    '!=',
    '===',
    '!==',
    '<',
    '<=',
    '>',
    '>=',
    '<<',
    '>>',
    '>>>',
    '+',
    '-',
    '*',
    '/',
    '%',
    '**',
    ',',
    '&&',
    ',',
    '^',
    '&',
];
// const specialOps = ['in' , 'instanceof'];
describe('BinaryExpressions', () => {
    it('should evaluate operators the same as the host environment', () => {
        const sample = [2, 120, 1981, '2', 'hi', NaN, true, false, 1 / 0];
        const results = operators.flatMap(op => sample.flatMap(l => sample.map(r => util_1.compare(`${JSON.stringify(l)} ${op} ${JSON.stringify(r)}`))));
        results.forEach(result => util_1.assertResult(result));
    });
    it('should retain shortcircuit behavior', () => {
        util_1.assertResult(util_1.compare(`typeof x == 'string' && nonexistant()`));
    });
});
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