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Update current preference-using Date.RelativeFormatStyle tests #1444

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Jul 19, 2025
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Update current preference-using Date.RelativeFormatStyle tests #1444

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43 changes: 27 additions & 16 deletions Tests/FoundationInternationalizationTests/Formatting/DateRelativeFormatStyleTests.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -45,18 +45,20 @@ private struct DateRelativeFormatStyleTests {
#expect(style.format(Date(timeIntervalSinceNow: oneHour * 1.5)) == "in 2 hours")
}

@Test func dateRelativeFormatConvenience() throws {
let now = Date()
let tomorrow = Date(timeInterval: oneDay + oneHour * 2, since: now)
let future = Date(timeInterval: oneDay * 14 + oneHour * 3, since: now)
let past = Date(timeInterval: -(oneDay * 14 + oneHour * 2), since: now)

#expect(past.formatted(.relative(presentation: .named).locale(enUSLocale)) == Date.RelativeFormatStyle(presentation: .named, unitsStyle: .wide).locale(enUSLocale).format(past))
#expect(tomorrow.formatted(.relative(presentation: .numeric).locale(enUSLocale)) == Date.RelativeFormatStyle(presentation: .numeric, unitsStyle: .wide).locale(enUSLocale).format(tomorrow))
#expect(tomorrow.formatted(Date.RelativeFormatStyle(presentation: .named).locale(enUSLocale)) == Date.RelativeFormatStyle(presentation: .named).locale(enUSLocale).format(tomorrow))

#expect(past.formatted(Date.RelativeFormatStyle(unitsStyle: .spellOut, capitalizationContext: .beginningOfSentence).locale(enUSLocale)) == Date.RelativeFormatStyle(unitsStyle: .spellOut, capitalizationContext: .beginningOfSentence).locale(enUSLocale).format(past))
#expect(future.formatted(.relative(presentation: .numeric, unitsStyle: .abbreviated).locale(enUSLocale)) == Date.RelativeFormatStyle(unitsStyle: .abbreviated).locale(enUSLocale).format(future))
@Test func dateRelativeFormatConvenience() async {
await usingCurrentInternationalizationPreferences {
let now = Date()
let tomorrow = Date(timeInterval: oneDay + oneHour * 2, since: now)
let future = Date(timeInterval: oneDay * 14 + oneHour * 3, since: now)
let past = Date(timeInterval: -(oneDay * 14 + oneHour * 2), since: now)

#expect(past.formatted(.relative(presentation: .named).locale(enUSLocale)) == Date.RelativeFormatStyle(presentation: .named, unitsStyle: .wide).locale(enUSLocale).format(past))
#expect(tomorrow.formatted(.relative(presentation: .numeric).locale(enUSLocale)) == Date.RelativeFormatStyle(presentation: .numeric, unitsStyle: .wide).locale(enUSLocale).format(tomorrow))
#expect(tomorrow.formatted(Date.RelativeFormatStyle(presentation: .named).locale(enUSLocale)) == Date.RelativeFormatStyle(presentation: .named).locale(enUSLocale).format(tomorrow))

#expect(past.formatted(Date.RelativeFormatStyle(unitsStyle: .spellOut, capitalizationContext: .beginningOfSentence).locale(enUSLocale)) == Date.RelativeFormatStyle(unitsStyle: .spellOut, capitalizationContext: .beginningOfSentence).locale(enUSLocale).format(past))
#expect(future.formatted(.relative(presentation: .numeric, unitsStyle: .abbreviated).locale(enUSLocale)) == Date.RelativeFormatStyle(unitsStyle: .abbreviated).locale(enUSLocale).format(future))
}
}

@Test func namedStyleRounding() throws {
Expand Down Expand Up @@ -332,8 +334,8 @@ private struct DateRelativeFormatStyleTests {
var named = Date.RelativeFormatStyle(presentation: .named, locale: enUSLocale, calendar: calendar)

func _verifyStyle(_ dateStr: String, relativeTo: String, expected: String, sourceLocation: SourceLocation = #_sourceLocation) {
let date = try! Date.ISO8601FormatStyle().parse(dateStr)
let refDate = try! Date.ISO8601FormatStyle().parse(relativeTo)
let date = try! Date.ISO8601FormatStyle(timeZone: .gmt).parse(dateStr)
let refDate = try! Date.ISO8601FormatStyle(timeZone: .gmt).parse(relativeTo)
let formatted = named._format(date, refDate: refDate)
#expect(formatted == expected, sourceLocation: sourceLocation)
}
Expand Down Expand Up @@ -408,7 +410,7 @@ private struct TestDateAnchoredRelativeDiscreteConformance {

@Test func examples() throws {
var now = Date.now
var style = Date.AnchoredRelativeFormatStyle(anchor: now)
var style = Date.AnchoredRelativeFormatStyle(anchor: now, calendar: calendar)
.locale(enUSLocale)

#expect(style.discreteInput(after: now.addingTimeInterval(1)) == now.addingTimeInterval(1.5))
Expand Down Expand Up @@ -868,28 +870,32 @@ private struct TestDateAnchoredRelativeDiscreteConformance {
now = Date(timeIntervalSinceReferenceDate: 724685580.417914)
style = .init(anchor: now, allowedFields: [.minute], presentation: .numeric, unitsStyle: .abbreviated)
style.calendar = self.calendar
style.locale = enUSLocale
#expect(try #require(style.discreteInput(after: Date(timeIntervalSinceReferenceDate: 12176601839.415668))) > Date(timeIntervalSinceReferenceDate: 12176601839.415668))


now = Date(timeIntervalSinceReferenceDate: 724686086.706003)
style = .init(anchor: now, allowedFields: [.minute], presentation: .numeric, unitsStyle: .abbreviated)
style.calendar = self.calendar
style.locale = enUSLocale
#expect(try #require(style.discreteInput(before: Date(timeIntervalSinceReferenceDate: -24141834543.08099))) < Date(timeIntervalSinceReferenceDate: -24141834543.08099))

now = Date(timeIntervalSinceReferenceDate: 724688507.315708)
style = .init(anchor: now, allowedFields: [.minute, .second], presentation: .numeric, unitsStyle: .abbreviated)
style.calendar = self.calendar
style.locale = enUSLocale
#expect(try #require(style.discreteInput(after: Date(timeIntervalSinceReferenceDate: 6013270816.926929))) > Date(timeIntervalSinceReferenceDate: 6013270816.926929))

now = Date(timeIntervalSinceReferenceDate: 724689590.234374)
style = .init(anchor: now, allowedFields: [.month, .week], presentation: .numeric, unitsStyle: .abbreviated)
style.calendar = self.calendar
print(style.format(Date(timeIntervalSinceReferenceDate: 722325435.4645464)))
style.locale = enUSLocale
#expect(try #require(style.discreteInput(after: Date(timeIntervalSinceReferenceDate: 722325435.4645464))) > Date(timeIntervalSinceReferenceDate: 722325435.4645464))

now = Date(timeIntervalSinceReferenceDate: 724701229.591328)
style = .init(anchor: now, presentation: .numeric, unitsStyle: .abbreviated)
style.calendar = self.calendar
style.locale = enUSLocale
/// style.discreteInput(before: Date(timeIntervalSinceReferenceDate: -7256167.2374657225)) returned Date(timeIntervalSinceReferenceDate: -31622400.5), but
/// Date(timeIntervalSinceReferenceDate: -31622400.49), which is a valid input, because style.input(after: Date(timeIntervalSinceReferenceDate: -31622400.5)) = Date(timeIntervalSinceReferenceDate: -31622400.49),
/// already produces a different formatted output 'in 24 yr' compared to style.format(Date(timeIntervalSinceReferenceDate: -7256167.2374657225)), which is 'in 23 yr'
Expand All @@ -899,6 +905,7 @@ private struct TestDateAnchoredRelativeDiscreteConformance {
now = Date(timeIntervalSinceReferenceDate: 724707086.436074)
style = .init(anchor: now, presentation: .numeric, unitsStyle: .abbreviated)
style.calendar = self.calendar
style.locale = enUSLocale
/// style.discreteInput(after: Date(timeIntervalSinceReferenceDate: -728.7911686889214)) returned Date(timeIntervalSinceReferenceDate: 0.9360740142747098), but
/// Date(timeIntervalSinceReferenceDate: 0.9260740142747098), which is a valid input, because style.input(before: Date(timeIntervalSinceReferenceDate: 0.9360740142747098)) = Date(timeIntervalSinceReferenceDate: 0.9260740142747098),
/// already produces a different formatted output 'in 22 yr' compared to style.format(Date(timeIntervalSinceReferenceDate: -728.7911686889214)), which is 'in 23 yr'
Expand All @@ -908,11 +915,13 @@ private struct TestDateAnchoredRelativeDiscreteConformance {
now = Date(timeIntervalSinceReferenceDate: 724707983.332096)
style = .init(anchor: now, allowedFields: [.year, .month, .day, .hour, .minute], presentation: .named, unitsStyle: .wide)
style.calendar = self.calendar
style.locale = enUSLocale
#expect(try #require(style.discreteInput(after: Date(timeIntervalSinceReferenceDate: 722086631.228182))) > Date(timeIntervalSinceReferenceDate: 722086631.228182))

now = Date(timeIntervalSinceReferenceDate: 725887340.112405)
style = .init(anchor: now, allowedFields: [.month, .week, .day, .hour], presentation: .numeric, unitsStyle: .abbreviated)
style.calendar = self.calendar
style.locale = enUSLocale
/// style.discreteInput(before: Date(timeIntervalSinceReferenceDate: 728224511.9413433)) returned Date(timeIntervalSinceReferenceDate: 727487999.6124048), but
/// Date(timeIntervalSinceReferenceDate: 727487999.6224048), which is a valid input, because style.input(after: Date(timeIntervalSinceReferenceDate: 727487999.6124048)) = Date(timeIntervalSinceReferenceDate: 727487999.6224048),
/// already produces a different formatted output '3 wk ago' compared to style.format(Date(timeIntervalSinceReferenceDate: 728224511.9413433)), which is '1 mo ago'
Expand All @@ -921,6 +930,7 @@ private struct TestDateAnchoredRelativeDiscreteConformance {
now = Date(timeIntervalSinceReferenceDate: 725895690.016681)
style = .init(anchor: now, presentation: .numeric, unitsStyle: .abbreviated)
style.calendar = self.calendar
style.locale = enUSLocale
/// style.discreteInput(before: Date(timeIntervalSinceReferenceDate: 726561180.513301)) returned Date(timeIntervalSinceReferenceDate: 726364799.5166808), but
/// Date(timeIntervalSinceReferenceDate: 726364799.5266808), which is a valid input, because style.input(after: Date(timeIntervalSinceReferenceDate: 726364799.5166808)) = Date(timeIntervalSinceReferenceDate: 726364799.5266808),
/// already produces a different formatted output '6 days ago' compared to style.format(Date(timeIntervalSinceReferenceDate: 726561180.513301)), which is '1 wk ago'
Expand All @@ -929,6 +939,7 @@ private struct TestDateAnchoredRelativeDiscreteConformance {
now = Date(timeIntervalSinceReferenceDate: 725903036.660503)
style = .init(anchor: now, presentation: .numeric, unitsStyle: .abbreviated)
style.calendar = self.calendar
style.locale = enUSLocale
/// style.discreteInput(after: Date(timeIntervalSinceReferenceDate: 725318223.6599436)) returned Date(timeIntervalSinceReferenceDate: 725414400.1605031), but
/// Date(timeIntervalSinceReferenceDate: 725398549.919868), which is a valid input, because style.input(before: Date(timeIntervalSinceReferenceDate: 725414400.1605031)) = Date(timeIntervalSinceReferenceDate: 725414400.1505032),
/// already produces a different formatted output 'in 6 days' compared to style.format(Date(timeIntervalSinceReferenceDate: 725318223.6599436)), which is 'in 1 wk'
Expand Down