99 lines
3 KiB
TypeScript
99 lines
3 KiB
TypeScript
import bigInt from 'big-integer'
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import { expect } from 'chai'
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import { describe, it } from 'mocha'
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import { bigIntToBuffer, bufferToBigInt } from '../src'
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// since bigIntToBuffer is a tiny wrapper over writeBigInt, no need to test it individually
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describe('bigIntToBuffer', () => {
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it('should handle writing to BE', () => {
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expect([...bigIntToBuffer(bigInt('10495708'), 0, false)]).eql([
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0xa0, 0x26, 0xdc,
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])
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expect([...bigIntToBuffer(bigInt('10495708'), 4, false)]).eql([
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0x00, 0xa0, 0x26, 0xdc,
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])
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expect([...bigIntToBuffer(bigInt('10495708'), 8, false)]).eql([
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0x00, 0x00, 0x00, 0x00, 0x00, 0xa0, 0x26, 0xdc,
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])
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expect([...bigIntToBuffer(bigInt('3038102549'), 4, false)]).eql([
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0xb5, 0x15, 0xc4, 0x15,
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])
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expect([
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...bigIntToBuffer(bigInt('9341376580368336208'), 8, false),
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]).eql([...Buffer.from('81A33C81D2020550', 'hex')])
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})
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it('should handle writing to LE', () => {
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expect([...bigIntToBuffer(bigInt('10495708'), 0, true)]).eql([
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0xdc, 0x26, 0xa0,
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])
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expect([...bigIntToBuffer(bigInt('10495708'), 4, true)]).eql([
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0xdc, 0x26, 0xa0, 0x00,
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])
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expect([...bigIntToBuffer(bigInt('10495708'), 8, true)]).eql([
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0xdc, 0x26, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x00,
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])
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expect([...bigIntToBuffer(bigInt('3038102549'), 4, true)]).eql([
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0x15, 0xc4, 0x15, 0xb5,
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])
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expect([...bigIntToBuffer(bigInt('9341376580368336208'), 8, true)]).eql(
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[...Buffer.from('81A33C81D2020550', 'hex').reverse()],
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)
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})
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})
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describe('bufferToBigInt', () => {
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it('should handle reading BE', () => {
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expect(
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bufferToBigInt(
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Buffer.from([0xa0, 0x26, 0xdc]),
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0,
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3,
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false,
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).toString(),
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).eq('10495708')
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expect(
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bufferToBigInt(
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Buffer.from([0x00, 0xa0, 0x26, 0xdc]),
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0,
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4,
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false,
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).toString(),
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).eq('10495708')
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expect(
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bufferToBigInt(
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Buffer.from([0xb5, 0x15, 0xc4, 0x15]),
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0,
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4,
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false,
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).toString(),
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).eq('3038102549')
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})
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it('should handle reading LE', () => {
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expect(
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bufferToBigInt(
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Buffer.from([0xdc, 0x26, 0xa0]),
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0,
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3,
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true,
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).toString(),
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).eq('10495708')
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expect(
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bufferToBigInt(
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Buffer.from([0xdc, 0x26, 0xa0, 0x00]),
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0,
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4,
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true,
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).toString(),
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).eq('10495708')
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expect(
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bufferToBigInt(
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Buffer.from([0x15, 0xc4, 0x15, 0xb5]),
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0,
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4,
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true,
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).toString(),
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).eq('3038102549')
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})
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})
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