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Invalid timestamps for HOURLY interval RRULEs when DST change occurs #64

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Invalid timestamps for HOURLY interval RRULEs when DST change occurs #64

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72 changes: 72 additions & 0 deletions dst_test.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,72 @@
package rrule

import (
"testing"
"time"
)

func TestDST_HourlyDSTStart(t *testing.T) {
sydLoc, _ := time.LoadLocation("Australia/Sydney")
r, _ := NewRRule(ROption{Freq: HOURLY, Interval: 1, Count: 3,
Dtstart: time.Date(2022, 10, 2, 1, 0, 0, 0, sydLoc),
})
got := r.All()
want := []string{
"2022-10-02 01:00:00 +1000 AEST",
"2022-10-02 03:00:00 +1100 AEDT",
"2022-10-02 04:00:00 +1100 AEDT",
}
for i, g := range got {
if g.String() != want[i] {
t.Errorf("got: %v, want: %v", g, want[i])
}
}
var utcTimes []time.Time
for _, dt := range got {
utcTimes = append(utcTimes, dt.UTC())
}
want = []string{
"2022-10-01 15:00:00 +0000 UTC",
"2022-10-01 16:00:00 +0000 UTC",
"2022-10-01 17:00:00 +0000 UTC",
}

for i, g := range utcTimes {
if g.String() != want[i] {
t.Errorf("got: %v, want: %v", g, want[i])
}
}
}

func TestDST_HourlyDSTEnd(t *testing.T) {
sydLoc, _ := time.LoadLocation("Australia/Sydney")
r, _ := NewRRule(ROption{Freq: HOURLY, Interval: 1, Count: 3,
Dtstart: time.Date(2023, 4, 2, 1, 0, 0, 0, sydLoc),
})
got := r.All()
want := []string{
"2023-04-02 01:00:00 +1100 AEDT",
"2023-04-02 02:00:00 +1100 AEDT",
"2023-04-02 02:00:00 +1000 AEST",
}
for i, g := range got {
if g.String() != want[i] {
t.Errorf("got: %v, want: %v", g, want[i])
}
}

var utcTimes []time.Time
for _, dt := range got {
utcTimes = append(utcTimes, dt.UTC())
}
want = []string{
"2023-04-01 14:00:00 +0000 UTC",
"2023-04-01 15:00:00 +0000 UTC",
"2023-04-01 16:00:00 +0000 UTC",
}
for i, g := range utcTimes {
if g.String() != want[i] {
t.Errorf("got: %v, want: %v", g, want[i])
}
}
}