bigints.js

import inspect from '../lib/index.js'
import { expect } from 'chai'
describe('bigints', () => {
  it('returns number as passed in', () => {
    expect(inspect(1n)).to.equal('1n')
    expect(inspect(0n)).to.equal('0n')
  })

  it('uses scientific notation where possible', () => {
    expect(inspect(1e300)).to.equal('1e+300')
  })

  describe('colors', () => {
    it('returns string with yellow color, if colour is set to true', () => {
      expect(inspect(1n, { colors: true })).to.equal('\u001b[33m1n\u001b[39m')
    })
  })

  describe('truncate', () => {
    it('returns the full representation when truncate is over string length', () => {
      expect(inspect(3141592654n, { truncate: 11 })).to.equal('3141592654n')
    })

    it('truncates numbers longer than truncate (10)', () => {
      expect(inspect(3141592654n, { truncate: 10 })).to.equal('31415926…n')
    })

    it('truncates numbers longer than truncate (9)', () => {
      expect(inspect(3141592654n, { truncate: 9 })).to.equal('3141592…n')
    })
    it('truncates numbers longer than truncate (8)', () => {
      expect(inspect(3141592654n, { truncate: 8 })).to.equal('314159…n')
    })

    it('truncates numbers longer than truncate (7)', () => {
      expect(inspect(3141592654n, { truncate: 7 })).to.equal('31415…n')
    })

    it('truncates numbers longer than truncate (6)', () => {
      expect(inspect(3141592654n, { truncate: 6 })).to.equal('3141…n')
    })

    it('truncates numbers longer than truncate (5)', () => {
      expect(inspect(3141592654n, { truncate: 5 })).to.equal('314…n')
    })

    it('truncates numbers longer than truncate (4)', () => {
      expect(inspect(3141592654n, { truncate: 4 })).to.equal('31…n')
    })

    it('truncates numbers longer than truncate (3)', () => {
      expect(inspect(3141592654n, { truncate: 3 })).to.equal('3…n')
    })

    it('truncates numbers longer than truncate (2)', () => {
      expect(inspect(3141592654n, { truncate: 2 })).to.equal('…')
    })

    it('truncates numbers longer than truncate (1)', () => {
      expect(inspect(3141592654n, { truncate: 1 })).to.equal('…')
    })

    it('disregards truncate when it cannot truncate further (0)', () => {
      expect(inspect(3141592654n, { truncate: 0 })).to.equal('…')
    })

    it('does not truncate if tail is same length as value', () => {
      expect(inspect(3n, { truncate: 0 })).to.equal('3n')
    })
  })
})