gramjs/__tests__/crypto/readBuffer.spec.js

const Helpers = require('../../gramjs/Helpers')

describe('readBufferFromBigInt 8 bytes function', () => {
    test('it should return 0x20a13b25e1726bfc', () => {
        const input = BigInt('-257986242325798624')
        const output = Buffer.from('20a13b25e1726bfc', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 8, true, true)).toEqual(output)
    })
    test('it should return 0xe05ec4da1e8d9403', () => {
        const input = BigInt('257986242325798624')
        const output = Buffer.from('e05ec4da1e8d9403', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 8, true, false)).toEqual(output)
    })
    test('it should return 0xfc6b72e1253ba120', () => {
        const input = BigInt('-257986242325798624')
        const output = Buffer.from('fc6b72e1253ba120', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 8, false, true)).toEqual(output)
    })
    test('it should return 0x03948d1edac45ee0', () => {
        const input = BigInt('257986242325798624')
        const output = Buffer.from('03948d1edac45ee0', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 8, false, false)).toEqual(output)
    })
})

describe('readBufferFromBigInt 16 bytes function', () => {
    test('it should return 0x8416c07962dac053b4346df39e5d97ec', () => {
        const input = BigInt('-25798624232579862436622316998984984956')
        const output = Buffer.from('8416c07962dac053b4346df39e5d97ec', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 16, true, true)).toEqual(output)
    })
    test('it should return 0x7ce93f869d253fac4bcb920c61a26813', () => {
        const input = BigInt('25798624232579862436622316998984984956')
        const output = Buffer.from('7ce93f869d253fac4bcb920c61a26813', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 16, true, false)).toEqual(output)
    })
    test('it should return 0xec975d9ef36d34b453c0da6279c01684', () => {
        const input = BigInt('-25798624232579862436622316998984984956')
        const output = Buffer.from('ec975d9ef36d34b453c0da6279c01684', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 16, false, true)).toEqual(output)
    })
    test('it should return 0x1368a2610c92cb4bac3f259d863fe97c', () => {
        const input = BigInt('25798624232579862436622316998984984956')
        const output = Buffer.from('1368a2610c92cb4bac3f259d863fe97c', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 16, false, false)).toEqual(output)
    })
})

describe('readBufferFromBigInt 32 bytes function', () => {
    test('it should return 0x7f113f5e2096936ec90cc4c73cc7bd3c96d20c115bf9ceb05c34232c037ff6c6', () => {
        const input = BigInt('-25798624232579862436622316998984984912345482145214526587420145210501554564737')
        const output = Buffer.from('7f113f5e2096936ec90cc4c73cc7bd3c96d20c115bf9ceb05c34232c037ff6c6', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 32, true, true)).toEqual(output)
    })
    test('it should return 0x81eec0a1df696c9136f33b38c33842c3692df3eea406314fa3cbdcd3fc800939', () => {
        const input = BigInt('25798624232579862436622316998984984912345482145214526587420145210501554564737')
        const output = Buffer.from('81eec0a1df696c9136f33b38c33842c3692df3eea406314fa3cbdcd3fc800939', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 32, true, false)).toEqual(output)
    })
    test('it should return 0xc6f67f032c23345cb0cef95b110cd2963cbdc73cc7c40cc96e9396205e3f117f', () => {
        const input = BigInt('-25798624232579862436622316998984984912345482145214526587420145210501554564737')
        const output = Buffer.from('c6f67f032c23345cb0cef95b110cd2963cbdc73cc7c40cc96e9396205e3f117f', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 32, false, true)).toEqual(output)
    })
    test('it should return 0x390980fcd3dccba34f3106a4eef32d69c34238c3383bf336916c69dfa1c0ee81', () => {
        const input = BigInt('25798624232579862436622316998984984912345482145214526587420145210501554564737')
        const output = Buffer.from('390980fcd3dccba34f3106a4eef32d69c34238c3383bf336916c69dfa1c0ee81', 'hex')
        expect(Helpers.readBufferFromBigInt(input, 32, false, false)).toEqual(output)
    })
})