8000 Merge pull request #249 from github/tweak-rounding-rules-for-months · github/relative-time-element@244af66 · GitHub
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keithamuskeithamus
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Merge pull request #249 from github/tweak-rounding-rules-for-months
tweak rounding rules for months
2 parents cce3194 + d39c73e commit 244af66

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3 files changed

+94
-41
lines changed

3 files changed

+94
-41
lines changed

‎src/duration.ts

Lines changed: 17 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -150,20 +150,29 @@ export function roundToSingleUnit(duration: Duration, {relativeTo = Date.now()}:
150150
if (hours >= 21) days += Math.round(hours / 24)
151151
if (days || weeks || months || years) hours = 0
152152

153+
const currentYear = relativeTo.getFullYear()
154+
let currentMonth = relativeTo.getMonth()
155+
const currentDate = relativeTo.getDate()
156+
if (days >= 27 || (years + months && days)) {
157+
relativeTo.setDate(currentDate + days * sign)
158+
days = 0
159+
months += Math.abs(
160+
relativeTo.getFullYear() >= currentYear
161+
? relativeTo.getMonth() - currentMonth
162+
: relativeTo.getMonth() - currentMonth - 12,
163+
)
164+
currentMonth = relativeTo.getMonth()
165+
}
166+
153167
if (days >= 6) weeks += Math.round(days / 7)
154168
if (weeks || months || years) days = 0
155169

156170
if (weeks >= 4) months += Math.round(weeks / 4)
157171
if (months || years) weeks = 0
158172

159-
const currentMonth = relativeTo.getMonth()
160-
const delta = sign < 0 ? currentMonth : 12 - currentMonth
161-
if (months && months >= delta) {
162-
years += 1
163-
relativeTo.setFullYear(relativeTo.getFullYear() + sign)
164-
relativeTo.setMonth(0)
165-
months -= delta
166-
years += Math.floor(months / 12)
173+
if (months >= 11 || (years && months)) {
174+
relativeTo.setMonth(relativeTo.getMonth() + months * sign)
175+
years += Math.abs(currentYear - relativeTo.getFullYear())
167176
}
168177
if (years) months = 0
169178

‎test/duration.ts

Lines changed: 73 additions & 29 deletions
Original file line numberDiff line numberDiff line change
@@ -235,41 +235,72 @@ suite('duration', function () {
235235
['PT1H55M', 'PT2H'],
236236
['PT20H', 'PT20H'],
237237
['PT21H', 'P1D'],
238-
['P4D', 'P4D'],
239-
['P6D', 'P1W'],
240-
['P2W', 'P2W'],
241-
['P3W3D', 'P3W'],
242-
['P3W6D', 'P1M'],
243-
['P21D', 'P3W'],
244-
['P24D', 'P3W'],
245-
['P24DT25H', 'P1M'],
246-
['P25D', 'P1M'],
247-
['P1M1D', 'P1M'],
238+
['P4D', 'P4D', {relativeTo: new Date('2023-07-01T00:00:00')}],
239+
['-P4D', '-P4D', {relativeTo: new Date('2023-07-01T00:00:00')}],
240+
['P6D', 'P1W', {relativeTo: new Date('2023-07-01T00:00:00')}],
241+
['-P6D', '-P1W', {relativeTo: new Date('2023-07-01T00:00:00')}],
242+
['P2W', 'P2W', {relativeTo: new Date('2023-07-01T00:00:00')}],
243+
['-P2W', '-P2W', {relativeTo: new Date('2023-07-01T00:00:00')}],
244+
['P3W3D', 'P3W', {relativeTo: new Date('2023-07-01T00:00:00')}],
245+
['-P3W3D', '-P3W', {relativeTo: new Date('2023-07-01T00:00:00')}],
246+
['P3W6D', 'P1M', {relativeTo: new Date('2023-07-01T00:00:00')}],
247+
['-P3W6D', '-P1M', {relativeTo: new Date('2023-07-01T00:00:00')}],
248+
['P21D', 'P3W', {relativeTo: new Date('2023-07-01T00:00:00')}],
249+
['-P21D', '-P3W', {relativeTo: new Date('2023-07-01T00:00:00')}],
250+
['P24D', 'P3W', {relativeTo: new Date('2023-07-01T00:00:00')}],
251+
['-P24D', '-P3W', {relativeTo: new Date('2023-07-01T00:00:00')}],
252+
['P24DT25H', 'P1M', {relativeTo: new Date('2023-07-01T00:00:00')}],
253+
['-P24DT25H', '-P1M', {relativeTo: new Date('2023-07-01T00:00:00')}],
254+
['P25D', 'P1M', {relativeTo: new Date('2023-07-01T00:00:00')}],
255+
['-P25D', '-P1M', {relativeTo: new Date('2023-07-01T00:00:00')}],
256+
['P1M1D', 'P1M', {relativeTo: new Date('2023-07-02T00:00:00')}],
257+
['-P1M1D', '-P1M', {relativeTo: new Date('2023-07-02T00:00:00')}],
258+
['P1M1D', 'P2M', {relativeTo: new Date('2023-07-31T00:00:00')}],
259+
['-P1M1D', '-P2M', {relativeTo: new Date('2023-07-01T00:00:00')}],
260+
['P1D', 'P1D', {relativeTo: new Date('2022-01-01T00:00:00Z')}],
248261
['-P1D', '-P1D', {relativeTo: new Date('2022-01-01T00:00:00Z')}],
249262
['P8M', 'P8M', {relativeTo: new Date('2022-01-01T00:00:00Z')}],
250263
['-P8M', '-P8M', {relativeTo: new Date('2022-10-01T00:00:00Z')}],
251264
['P9M', 'P9M', {relativeTo: new Date('2022-01-01T00:00:00Z')}],
252265
['-P9M', '-P9M', {relativeTo: new Date('2022-11-01T00:00:00Z')}],
253-
['-P1M', '-P1Y', {relativeTo: new Date('2023-01-01T00:00:00Z')}],
254-
['P1M', 'P1Y', {relativeTo: new Date('2023-12-01T00:00:00Z')}],
266+
['P1M', 'P1M', {relativeTo: new Date('2023-12-01T00:00:00Z')}],
267+
['-P1M', '-P1M', {relativeTo: new Date('2023-01-01T00:00:00Z')}],
268+
['P1M15D', 'P1M', {relativeTo: new Date('2023-12-01T00:00:00Z')}],
269+
['-P1M15D', '-P2M', {relativeTo: new Date('2023-01-01T00:00:00Z')}],
270+
['P1M15D', 'P2M', {relativeTo: new Date('2023-01-18T00:00:00Z')}],
271+
['-P1M15D', '-P2M', {relativeTo: new Date('2023-01-01T00:00:00Z')}],
272+
['P1M15D', 'P2M', {relativeTo: new Date('2023-01-18T00:00:00Z')}],
255273
['-P18M', '-P2Y', {relativeTo: new Date('2023-01-01T00:00:00Z')}],
256274
['P18M', 'P2Y', {relativeTo: new Date('2023-12-01T00:00:00Z')}],
257-
['-P18M', '-P2Y', {relativeTo: new Date('2023-07-01T00:00:00Z')}],
275+
['-P18M', '-P1Y', {relativeTo: new Date('2023-07-01T00:00:00Z')}],
258276
['P18M', 'P2Y', {relativeTo: new Date('2023-07-01T00:00:00Z')}],
259277
['-P18M', '-P1Y', {relativeTo: new Date('2023-08-01T00:00:00Z')}],
260278
['P18M', 'P1Y', {relativeTo: new Date('2023-03-01T00:00:00Z')}],
261-
['-P9M20DT25H', '-P9M', {relativeTo: new Date('2023-11-12T00:00:00Z')}],
262-
['P9M20DT25H', 'P9M', {relativeTo: new Date('2023-01-12T00:00:00Z')}],
279+
[
280+
'-P9M20DT25H',
281+
'-P10M',
282+
{
283+
relativeTo: new Date('2023-11-12T00:00:00Z'),
284+
},
285+
],
286+
['P9M20DT25H', 'P10M', {relativeTo: new Date('2023-01-12T00:00:00Z')}],
263287
['P11M', 'P1Y', {relativeTo: new Date('2022-11-01T00:00:00Z')}],
264288
['-P11M', '-P1Y', {relativeTo: new Date('2022-11-01T00:00:00Z')}],
265289
['P1Y4D', 'P1Y', {relativeTo: new Date('2022-11-01T00:00:00Z')}],
266290
['P1Y5M13D', 'P1Y', {relativeTo: new Date('2023-01-01T00:00:00Z')}],
267291
['P1Y5M15D', 'P1Y', {relativeTo: new Date('2023-01-01T00:00:00Z')}],
268292
['P1Y5M20D', 'P1Y', {relativeTo: new Date('2023-01-01T00:00:00Z')}],
269293
['P1Y10M', 'P2Y', {relativeTo: new Date('2022-11-01T00:00:00Z')}],
270-
['-P1Y10M', '-P2Y', {relativeTo: new Date('2022-11-01T00:00:00Z')}],
294+
['-P1Y10M', '-P1Y', {relativeTo: new Date('2022-11-01T00:00:00Z')}],
271295
['P1Y10M', 'P1Y', {relativeTo: new Date('2022-01-01T00:00:00Z')}],
272296
['-P1Y10M', '-P1Y', {relativeTo: new Date('2022-12-01T00:00:00Z')}],
297+
[
298+
'-P1Y5M20D',
299+
'-P2Y',
300+
{
301+
relativeTo: new Date('2022-01-01T00:00:00Z'),
302+
},
303+
],
273304
])
274305
for (const [input, expected, opts] of roundTests) {
275306
test(`roundToSingleUnit(${input}) === ${expected}`, () => {
@@ -299,16 +330,29 @@ suite('duration', function () {
299330
['PT1H31M', [1, 'hour']],
300331
['PT1H55M', [2, 'hour']],
301332
['PT20H', [20, 'hour']],
302-
['PT21H', [1, 'day']],
303-
['P4D', [4, 'day']],
304-
['P6D', [1, 'week']],
305-
['P2W', [2, 'week']],
306-
['P3W3D', [3, 'week']],
307-
['P3W6D', [1, 'month']],
308-
['P21D', [3, 'week']],
309-
['P24D', [3, 'week']],
310-
['P24DT25H', [1, 'month']],
311-
['P25D', [1, 'month']],
333+
['PT21H', [1, 'day'], {relativeTo: '2023-01-15T00:00:00Z'}],
334+
['-PT21H', [-1, 'day'], {relativeTo: '2023-01-15T00:00:00Z'}],
335+
['P4D', [4, 'day'], {relativeTo: '2023-01-15T00:00:00Z'}],
336+
['-P4D', [-4, 'day'], {relativeTo: '2023-01-15T00:00:00Z'}],
337+
['P6D', [1, 'week'], {relativeTo: '2023-01-15T00:00:00Z'}],
338+
['-P6D', [-1, 'week'], {relativeTo: '2023-01-15T00:00:00Z'}],
339+
['P2W', [2, 'week'], {relativeTo: '2023-01-15T00:00:00Z'}],
340+
['-P2W', [-2, 'week'], {relativeTo: '2023-01-15T00:00:00Z'}],
341+
['P3W3D', [3, 'week'], {relativeTo: '2023-01-15T00:00:00Z'}],
342+
['-P3W3D', [-3, 'week'], {relativeTo: '2023-01-15T00:00:00Z'}],
343+
['P3W6D', [1, 'month'], {relativeTo: '2023-01-15T00:00:00Z'}],
344+
['-P3W6D', [-1, 'month'], {relativeTo: '2023-01-15T00:00:00Z'}],
345+
['P21D', [3, 'week'], {relativeTo: '2023-01-01T00:00:00Z'}],
346+
['-P21D', [-3, 'week'], {relativeTo: '2023-01-01T00:00:00Z'}],
347+
['P24D', [3, 'week'], {relativeTo: '2023-01-01T00:00:00Z'}],
348+
['-P24D', [-3, 'week'], {relativeTo: '2023-01-01T00:00:00Z'}],
349+
['P24DT25H', [1, 'month'], {relativeTo: '2023-01-15T00:00:00Z'}],
350+
['P25D', [1, 'month'], {relativeTo: '2023-01-15T00:00:00Z'}],
351+
['-P35D', [-1, 'month'], {relativeTo: '2023-02-07T22:22:57Z'}],
352+
['-P45D', [-1, 'month'], {relativeTo: '2023-02-17T22:22:57Z'}],
353+
['-P55D', [-1, 'month'], {relativeTo: '2023-02-27T22:22:57Z'}],
354+
['-P65D', [-3, 'month'], {relativeTo: '2023-02-28T22:22:57Z'}],
355+
['-P75D', [-3, 'month'], {relativeTo: '2023-03-09T22:22:57Z'}],
312356
[
313357
'P8M',
314358
[8, 'month'],
@@ -337,7 +381,7 @@ suite('duration', function () {
337381
relativeTo: new Date('2022-12-01T00:00:00Z'),
338382
},
339383
],
340-
['P1M1D', [1, 'month']],
384+
['P1M1D', [1, 'month'], {relativeTo: new Date('2022-12-01T00:00:00Z')}],
341385
[
342386
'P9M20DT25H',
343387
[9, 'month'],
@@ -347,14 +391,14 @@ suite('duration', function () {
347391
],
348392
[
349393
'-P9M20DT25H',
350-
[-9, 'month'],
394+
[-10, 'month'],
351395
{
352396
relativeTo: new Date('2022-12-01T00:00:00Z'),
353397
},
354398
],
355399
[
356400
'P9M24DT25H',
357-
[10, 'month'],
401+
[9, 'month'],
358402
{
359403
relativeTo: new Date('2022-01-01T00:00:00Z'),
360404
},

‎test/relative-time.js

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -471,7 +471,7 @@ suite('relative-time', function () {
471471
time.setAttribute('tense', 'past')
472472
time.setAttribute('datetime', '2023-06-01T00:00:00Z')
473473
await Promise.resolve()
474-
assert.equal(time.shadowRoot.textContent, '3 months ago')
474+
assert.equal(time.shadowRoot.textContent, '4 months ago')
475475
})
476476

477477
test('micro formats years', async () => {
@@ -1174,7 +1174,7 @@ suite('relative-time', function () {
11741174
datetime: '2022-12-03T15:46:00.000Z',
11751175
tense: 'future',
11761176
format: 'relative',
1177-
expected: 'next month',
1177+
expected: 'in 2 months',
11781178
},
11791179
{
11801180
datetime: '2022-12-03T15:46:00.000Z',
@@ -2408,14 +2408,14 @@ suite('relative-time', function () {
24082408
datetime: '2024-03-01T12:00:00.000Z',
24092409
tense: 'future',
24102410
format: 'auto',
2411-
expected: 'in 2 years',
2411+
expected: 'in 3 years',
24122412 70B4
},
24132413
{
24142414
reference: '2022-12-31T12:00:00.000Z',
24152415
datetime: '2024-03-01T12:00:00.000Z',
24162416
tense: 'future',
24172417
format: 'micro',
2418-
expected: '2y',
2418+
expected: '3y',
24192419
},
24202420
{
24212421
reference: '2021-04-24T12:00:00.000Z',

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