src/parse.test.js

import {parse, Parser} from './parse'
import Decimal from 'decimal.js'
import LDecimal from 'decimal.js-light'
import BDecimal from 'break_infinity.js'

describe('parse', () => {
  it('parses suffixes from user input', () => {
    expect(parse('10')).toBe(10)
    expect(parse('10k')).toBe(10000)
    expect(parse('10x')).toBeNaN()
    expect(parse('10x', {default: 3})).toBe(3)
    expect(parse('10,000')).toBe(10000)
    expect(parse('10 thousand')).toBe(10000)
    expect(parse('10e3')).toBe(10000)
    expect(parse('')).toBeNull()
    expect(parse('', {default: 3})).toBe(3)
    expect(parse(null)).toBeNull()
    expect(parse(undefined)).toBeNull()
    expect(parse('0', {default: 3})).toBe(0)
    expect(parse('fail')).toBeNaN()
  })
  it('parses decimal.js', () => {
    const parser = new Parser({backend: 'decimal.js'})
    const parse = (text, config) => parser.parse(text, config)
    expect(parse('10')).toEqual(new Decimal(10))
    expect(parse('10k')).toEqual(new Decimal(10000))
    expect(() => parse('10x')).toThrow()
    expect(parse('10x', {default: new Decimal(3)})).toEqual(new Decimal(3))
    expect(parse('10,000')).toEqual(new Decimal(10000))
    expect(parse('10 thousand')).toEqual(new Decimal(10000))
    expect(parse('10e3')).toEqual(new Decimal(10000))
    expect(parse('')).toBeNull()
    expect(parse('', {default: new Decimal(3)})).toEqual(new Decimal(3))
    expect(parse(null)).toBeNull()
    expect(parse(undefined)).toBeNull()
    expect(parse('0', {default: new Decimal(3)})).toEqual(new Decimal(0))
    expect(() => parse('fail')).toThrow()
  })
  it('parses decimal.js-light', () => {
    const Decimal = LDecimal
    const parser = new Parser({backend: 'decimal.js', Decimal})
    const parse = (text, config) => parser.parse(text, config)
    expect(parse('10')).toEqual(new Decimal(10))
    expect(parse('10k')).toEqual(new Decimal(10000))
    expect(() => parse('10x')).toThrow()
    expect(parse('10x', {default: new Decimal(3)})).toEqual(new Decimal(3))
    expect(parse('10,000')).toEqual(new Decimal(10000))
    expect(parse('10 thousand')).toEqual(new Decimal(10000))
    expect(parse('10e3')).toEqual(new Decimal(10000))
    expect(parse('')).toBeNull()
    expect(parse('', {default: new Decimal(3)})).toEqual(new Decimal(3))
    expect(parse(null)).toBeNull()
    expect(parse(undefined)).toBeNull()
    expect(parse('0', {default: new Decimal(3)})).toEqual(new Decimal(0))
    expect(() => parse('fail')).toThrow()
  })
  it('parses break_infinity.js', () => {
    const Decimal = BDecimal
    const parser = new Parser({backend: 'decimal.js', Decimal})
    const parse = (text, config) => parser.parse(text, config)
    expect(parse('10')).toEqual(new Decimal(10))
    expect(parse('10k')).toEqual(new Decimal(10000))
    //expect(() => parse('10x')).toThrow()
    //expect(parse('10x', {default: new Decimal(3)})).toEqual(new Decimal(3))
    expect(parse('10,000')).toEqual(new Decimal(10000))
    expect(parse('10 thousand')).toEqual(new Decimal(10000))
    expect(parse('10e3')).toEqual(new Decimal(10000))
    expect(parse('')).toBeNull()
    expect(parse('', {default: new Decimal(3)})).toEqual(new Decimal(3))
    expect(parse(null)).toBeNull()
    expect(parse(undefined)).toBeNull()
    expect(parse('0', {default: new Decimal(3)})).toEqual(new Decimal(0))
    //expect(() => parse('fail')).toThrow()
  })
})