bootstrap-vue/src/utils/number.spec.js

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import { toFixed, toFloat, toInteger } from './number'

describe('utils/number', () => {
  it('toInteger works', async () => {
    expect(toInteger(1)).toBe(1)
    expect(toInteger('1')).toBe(1)
    expect(toInteger(1e5)).toBe(100000)
    expect(toInteger('1e5')).toBe(1)
    expect(toInteger('256 foobar')).toBe(256)
    expect(toInteger('foo 256bar')).toBe(NaN)
    expect(toInteger({})).toBe(NaN)
    expect(toInteger([])).toBe(NaN)
    expect(toInteger(new Date())).toBe(NaN)
    expect(toInteger(null)).toBe(NaN)
    expect(toInteger(undefined)).toBe(NaN)
    expect(toInteger(null, 0)).toBe(0)
    expect(toInteger(undefined, -1)).toBe(-1)
  })

  it('toFloat works', async () => {
    expect(toFloat(1)).toBe(1)
    expect(toFloat('1')).toBe(1)
    expect(toFloat(1.23)).toBe(1.23)
    expect(toFloat('1.23')).toBe(1.23)
    expect(toFloat(1e5)).toBe(100000)
    // `parseFloat()` works differently than `parseInt()` in this case
    expect(toFloat('1e5')).toBe(100000)
    expect(toFloat('256 foobar')).toBe(256)
    expect(toFloat('256.78 foobar')).toBe(256.78)
    expect(toFloat('foo 256bar')).toBe(NaN)
    expect(toFloat({})).toBe(NaN)
    expect(toFloat([])).toBe(NaN)
    expect(toFloat(new Date())).toBe(NaN)
    expect(toFloat(null)).toBe(NaN)
    expect(toFloat(undefined)).toBe(NaN)
    expect(toFloat(null, 0)).toBe(0)
    expect(toFloat(undefined, -1)).toBe(-1)
  })

  it('toFixed works', async () => {
    expect(toFixed(1)).toBe('1')
    expect(toFixed(1.23)).toBe('1')
    expect(toFixed(1.78)).toBe('2')
    expect(toFixed('1')).toBe('1')
    expect(toFixed('1.23')).toBe('1')
    expect(toFixed('1.78')).toBe('2')
    expect(toFixed(1, 2)).toBe('1.00')
    expect(toFixed('1', 2)).toBe('1.00')
    expect(toFixed('1 foo', 2)).toBe('1.00')
    expect(toFixed('foo 1 bar', 2)).toBe('NaN')
    expect(toFixed('1.23', 4)).toBe('1.2300')
    expect(toFixed('1.78', 2)).toBe('1.78')
    expect(toFixed({})).toBe('NaN')
    expect(toFixed([])).toBe('NaN')
    expect(toFixed(new Date())).toBe('NaN')
    expect(toFixed(null)).toBe('NaN')
    expect(toFixed(undefined)).toBe('NaN')
    expect(toFixed({}, 3)).toBe('NaN')
    expect(toFixed([], 2)).toBe('NaN')
    expect(toFixed(new Date(), 1)).toBe('NaN')
    expect(toFixed(null, 4)).toBe('NaN')
    expect(toFixed(undefined, 3)).toBe('NaN')
    expect(toFixed(1, '2')).toBe('1.00')
    expect(toFixed('1', '2')).toBe('1.00')
    expect(toFixed('1 foo', '2')).toBe('1.00')
    expect(toFixed('foo 1 bar', '2')).toBe('NaN')
    expect(toFixed(1, 'foo')).toBe('1')
    expect(toFixed('1', undefined)).toBe('1')
    expect(toFixed('1 foo', null)).toBe('1')
    expect(toFixed('foo 1 bar', {})).toBe('NaN')
  })
})