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// @flow
/* eslint-env mocha */
import assert from 'power-assert'
import sinon from 'sinon'
import toDate from '.'
describe('toDate', () => {
describe('date argument', () => {
it('returns a clone of the given date', () => {
const date = new Date(2016, 0, 1)
const dateClone = toDate(date)
dateClone.setFullYear(2015)
assert.deepEqual(date, new Date(2016, 0, 1))
})
})
describe('timestamp argument', () => {
it('creates a date from the timestamp', () => {
const timestamp = new Date(2016, 0, 1, 23, 30, 45, 123).getTime()
const result = toDate(timestamp)
assert.deepEqual(result, new Date(2016, 0, 1, 23, 30, 45, 123))
})
})
describe('invalid argument', () => {
mockConsoleWarn()
it('returns Invalid Date if argument is a string', () => {
// $ExpectedMistake
// @ts-expect-error
const result = toDate('1987-02-11')
assert(result instanceof Date)
// @ts-expect-error
assert(isNaN(result))
})
it('prints deprecation warning if the argument is a string', () => {
// $ExpectedMistake
console.warn = sinon.spy() // eslint-disable-line no-console
// $ExpectedMistake
// @ts-expect-error
toDate('1987-02-11')
assert(
// eslint-disable-next-line no-console
// @ts-expect-error
console.warn.calledWith(
"Starting with v2.0.0-beta.1 date-fns doesn't accept strings as date arguments. Please use `parseISO` to parse strings. See: https://git.io/fjule"
)
)
})
it('returns Invalid Date if argument is NaN', () => {
const result = toDate(NaN)
assert(result instanceof Date)
// @ts-expect-error
assert(isNaN(result))
})
it('returns Invalid Date if argument is Invalid Date', () => {
const result = toDate(new Date(NaN))
assert(result instanceof Date)
// @ts-expect-error
assert(isNaN(result))
})
it('returns Invalid Date if argument is null', () => {
// $ExpectedMistake
// @ts-expect-error
const result = toDate(null)
assert(result instanceof Date)
// @ts-expect-error
assert(isNaN(result))
})
it('returns Invalid Date if argument is undefined', () => {
// $ExpectedMistake
// @ts-expect-error
const result = toDate(undefined)
assert(result instanceof Date)
// @ts-expect-error
assert(isNaN(result))
})
it('returns Invalid Date if argument is false', () => {
// $ExpectedMistake
// @ts-expect-error
const result = toDate(false)
assert(result instanceof Date)
// @ts-expect-error
assert(isNaN(result))
})
it('returns Invalid Date if argument is true', () => {
// $ExpectedMistake
// @ts-expect-error
const result = toDate(true)
assert(result instanceof Date)
// @ts-expect-error
assert(isNaN(result))
})
})
describe('argument conversion', () => {
it('implicitly converts instance of Number into a number', () => {
// eslint-disable-next-line no-new-wrappers
const timestamp = new Number(
new Date(2016, 0, 1, 23, 30, 45, 123).getTime()
)
// $ExpectedMistake
// @ts-expect-error
const result = toDate(timestamp)
assert.deepEqual(result, new Date(2016, 0, 1, 23, 30, 45, 123))
})
})
it('throws TypeError exception if passed less than 1 argument', () => {
assert.throws(toDate.bind(null), TypeError)
})
})
function mockConsoleWarn() {
let originalWarn
beforeEach(() => {
originalWarn = console.warn // eslint-disable-line no-console
// $ExpectedMistake
console.warn = () => {} // eslint-disable-line no-console
})
afterEach(() => {
// $ExpectedMistake
// @ts-expect-error
console.warn = originalWarn // eslint-disable-line no-console
})
}
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