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// @flow
/* eslint-env mocha */
import assert from 'assert'
import eachHourOfInterval from '.'
describe('eachHourOfInterval', () => {
it('returns an array with starts of hours from the hour of the start date to the hour of the end date', () => {
const result = eachHourOfInterval({
start: new Date(2014, 9 /* Oct */, 6, 12),
end: new Date(2014, 9 /* Oct */, 6, 15)
})
assert.deepEqual(result, [
new Date(2014, 9 /* Oct */, 6, 12),
new Date(2014, 9 /* Oct */, 6, 13),
new Date(2014, 9 /* Oct */, 6, 14),
new Date(2014, 9 /* Oct */, 6, 15)
])
})
it('accepts timestamps', () => {
const result = eachHourOfInterval({
start: new Date(2014, 9 /* Oct */, 6, 12).getTime(),
end: new Date(2014, 9 /* Oct */, 6, 15).getTime()
})
assert.deepEqual(result, [
new Date(2014, 9 /* Oct */, 6, 12),
new Date(2014, 9 /* Oct */, 6, 13),
new Date(2014, 9 /* Oct */, 6, 14),
new Date(2014, 9 /* Oct */, 6, 15)
])
})
it('handles the hours that are not starts of hours', () => {
const result = eachHourOfInterval({
start: new Date(2014, 9 /* Oct */, 6, 12, 59, 59, 999),
end: new Date(2014, 9 /* Oct */, 6, 15, 59, 59, 999)
})
assert.deepEqual(result, [
new Date(2014, 9 /* Oct */, 6, 12),
new Date(2014, 9 /* Oct */, 6, 13),
new Date(2014, 9 /* Oct */, 6, 14),
new Date(2014, 9 /* Oct */, 6, 15)
])
})
it('returns one hour if the both arguments are on the same hour', () => {
const result = eachHourOfInterval({
start: new Date(2014, 9 /* Oct */, 6, 12, 35),
end: new Date(2014, 9 /* Oct */, 6, 12, 47)
})
assert.deepEqual(result, [new Date(2014, 9 /* Oct */, 6, 12)])
})
it('returns one hour if the both arguments are the same', () => {
const result = eachHourOfInterval({
start: new Date(2014, 9 /* Oct */, 6, 12, 35),
end: new Date(2014, 9 /* Oct */, 6, 12, 35)
})
assert.deepEqual(result, [new Date(2014, 9 /* Oct */, 6, 12)])
})
it('throws an exception if the start date is after the end date', () => {
const block = eachHourOfInterval.bind(null, {
start: new Date(2014, 9 /* Oct */, 12, 35, 0, 0, 1),
end: new Date(2014, 9 /* Oct */, 12, 35, 0, 0, 0)
})
assert.throws(block, RangeError)
})
it('throws an exception if the start date is `Invalid Date`', () => {
const block = eachHourOfInterval.bind(null, {
start: new Date(NaN),
end: new Date(2014, 9 /* Oct */, 6, 12)
})
assert.throws(block, RangeError)
})
it('throws an exception if the end date is `Invalid Date`', () => {
const block = eachHourOfInterval.bind(null, {
start: new Date(2014, 9 /* Oct */, 12, 12),
end: new Date(NaN)
})
assert.throws(block, RangeError)
})
it('throws an exception if the interval is undefined', () => {
const block = eachHourOfInterval.bind(
null,
// $ExpectedMistake
undefined
)
assert.throws(block, RangeError)
})
it('throws TypeError exception if passed less than 1 argument', () => {
assert.throws(eachHourOfInterval.bind(null), TypeError)
})
describe('options.step', () => {
const interval = {
start: new Date(2014, 9 /* Oct */, 6, 12),
end: new Date(2014, 9 /* Oct */, 6, 18)
}
const stepError = /^RangeError: `options.step` must be a number greater than 1$/
it('returns an array with starts of hours from the hour of the start date to the hour of the end date with the given step', () => {
const result = eachHourOfInterval(interval, { step: 3 })
assert.deepEqual(result, [
new Date(2014, 9 /* Oct */, 6, 12),
new Date(2014, 9 /* Oct */, 6, 15),
new Date(2014, 9 /* Oct */, 6, 18)
])
})
it('throws TypeError error if `options.step` is less than 1', () => {
assert.throws(() => eachHourOfInterval(interval, { step: 0 }), stepError)
assert.throws(() => eachHourOfInterval(interval, { step: -3 }), stepError)
})
it('throws TypeError error if `options.step` is NaN', () => {
// $ExpectedMistake
assert.throws(
() => eachHourOfInterval(interval, { step: 'w' }),
stepError
)
assert.throws(
() => eachHourOfInterval(interval, { step: NaN }),
stepError
)
})
})
})
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