41 lines
2.2 KiB
TypeScript
41 lines
2.2 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 '../utils'
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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([0xa0, 0x26, 0xdc])
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expect([...bigIntToBuffer(bigInt('10495708'), 4, false)]).eql([0x00, 0xa0, 0x26, 0xdc])
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expect([...bigIntToBuffer(bigInt('10495708'), 8, false)]).eql([0x00, 0x00, 0x00, 0x00, 0x00, 0xa0, 0x26, 0xdc])
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expect([...bigIntToBuffer(bigInt('3038102549'), 4, false)]).eql([0xb5, 0x15, 0xc4, 0x15])
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expect([...bigIntToBuffer(bigInt('9341376580368336208'), 8, false)]).eql([
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...Buffer.from('81A33C81D2020550', 'hex'),
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])
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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([0xdc, 0x26, 0xa0])
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expect([...bigIntToBuffer(bigInt('10495708'), 4, true)]).eql([0xdc, 0x26, 0xa0, 0x00])
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expect([...bigIntToBuffer(bigInt('10495708'), 8, true)]).eql([0xdc, 0x26, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x00])
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expect([...bigIntToBuffer(bigInt('3038102549'), 4, true)]).eql([0x15, 0xc4, 0x15, 0xb5])
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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(bufferToBigInt(Buffer.from([0xa0, 0x26, 0xdc]), 0, 3, false).toString()).eq('10495708')
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expect(bufferToBigInt(Buffer.from([0x00, 0xa0, 0x26, 0xdc]), 0, 4, false).toString()).eq('10495708')
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expect(bufferToBigInt(Buffer.from([0xb5, 0x15, 0xc4, 0x15]), 0, 4, false).toString()).eq('3038102549')
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})
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it('should handle reading LE', () => {
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expect(bufferToBigInt(Buffer.from([0xdc, 0x26, 0xa0]), 0, 3, true).toString()).eq('10495708')
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expect(bufferToBigInt(Buffer.from([0xdc, 0x26, 0xa0, 0x00]), 0, 4, true).toString()).eq('10495708')
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expect(bufferToBigInt(Buffer.from([0x15, 0xc4, 0x15, 0xb5]), 0, 4, true).toString()).eq('3038102549')
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})
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})
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