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local_date_time_test.go
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local_date_time_test.go
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package chrono_test
import (
"fmt"
"testing"
"github.com/go-chrono/chrono"
)
func TestLocalDateTimeOf(t *testing.T) {
for _, tt := range []struct {
datetime chrono.LocalDateTime
expectedDate chrono.LocalDate
expectedTime chrono.LocalTime
}{
{
datetime: chrono.LocalDateTime{},
expectedDate: chrono.LocalDateOf(1970, chrono.January, 1),
expectedTime: chrono.LocalTimeOf(0, 0, 0, 0),
},
{
datetime: chrono.LocalDateTimeOf(2020, chrono.March, 18, 12, 30, 0, 100000000),
expectedDate: chrono.LocalDateOf(2020, chrono.March, 18),
expectedTime: chrono.LocalTimeOf(12, 30, 0, 100000000),
},
} {
t.Run(tt.datetime.String(), func(t *testing.T) {
date, time := tt.datetime.Split()
if date != tt.expectedDate {
t.Errorf("datetime.Split() date = %s, want %s", date, tt.expectedDate)
}
if time.Compare(tt.expectedTime) != 0 {
t.Errorf("datetime.Split() time = %s, want %s", time, tt.expectedTime)
}
})
}
}
func TestOfLocalDateTime(t *testing.T) {
datetime := chrono.OfLocalDateTime(
chrono.LocalDateOf(2020, chrono.March, 18),
chrono.LocalTimeOf(12, 30, 0, 100000000),
)
date, time := datetime.Split()
if expected := chrono.LocalDateOf(2020, chrono.March, 18); date != expected {
t.Errorf("datetime.Split() date = %s, want %s", date, expected)
}
if expected := chrono.LocalTimeOf(12, 30, 0, 100000000); time != expected {
t.Errorf("datetime.Split() time = %s, want %s", time, expected)
}
}
func TestLocalDateTime_Compare(t *testing.T) {
for _, tt := range []struct {
name string
d chrono.LocalDateTime
d2 chrono.LocalDateTime
expected int
}{
{"earlier", chrono.LocalDateTimeOf(2020, chrono.March, 18, 11, 0, 0, 0), chrono.LocalDateTimeOf(2020, chrono.March, 18, 12, 0, 0, 0), -1},
{"later", chrono.LocalDateTimeOf(2020, chrono.March, 18, 13, 30, 0, 0), chrono.LocalDateTimeOf(2020, chrono.March, 18, 13, 29, 55, 0), 1},
{"equal", chrono.LocalDateTimeOf(2020, chrono.March, 18, 15, 0, 0, 1000), chrono.LocalDateTimeOf(2020, chrono.March, 18, 15, 0, 0, 1000), 0},
} {
t.Run(tt.name, func(t *testing.T) {
if v := tt.d.Compare(tt.d2); v != tt.expected {
t.Errorf("t.Compare(t2) = %d, want %d", v, tt.expected)
}
})
}
}
func TestLocalDateTime_Add(t *testing.T) {
t.Run("valid add", func(t *testing.T) {
datetime := chrono.LocalDateTimeOf(2020, chrono.March, 18, 12, 30, 0, 0)
duration := chrono.DurationOf(48*chrono.Hour + 1000*chrono.Nanosecond)
if !datetime.CanAdd(duration) {
t.Errorf("datetime = %s, datetime.CanAdd(%s) = false, want true", datetime, duration)
}
added := datetime.Add(duration)
expected := chrono.LocalDateTimeOf(2020, chrono.March, 20, 12, 30, 0, 1000)
if added.Compare(expected) != 0 {
t.Errorf("datetime = %s, datetime.Add(%s) = %s, want %s", datetime, duration, added, expected)
}
})
t.Run("invalid add to low", func(t *testing.T) {
datetime := chrono.MinLocalDateTime()
duration := chrono.DurationOf(-1 * chrono.Nanosecond)
if datetime.CanAdd(duration) {
t.Errorf("datetime = %s, datetime.CanAdd(%s) = true, want false", datetime, duration)
}
func() {
defer func() {
if r := recover(); r == nil {
t.Error("expecting panic that didn't occur")
}
}()
datetime.Add(duration)
}()
})
t.Run("invalid add to high", func(t *testing.T) {
datetime := chrono.MaxLocalDateTime()
duration := chrono.DurationOf(1 * chrono.Nanosecond)
if datetime.CanAdd(duration) {
t.Errorf("datetime = %s, datetime.CanAdd(%s) = true, want false", datetime, duration)
}
func() {
defer func() {
if r := recover(); r == nil {
t.Error("expecting panic that didn't occur")
}
}()
datetime.Add(duration)
}()
})
}
func TestLocalDateTime_AddDate(t *testing.T) {
for _, tt := range []struct {
name string
datetime chrono.LocalDateTime
addYears int
addMonths int
addDays int
expected chrono.LocalDateTime
}{
{"nothing", chrono.LocalDateTimeOf(2020, chrono.March, 18, 0, 0, 0, 0), 0, 0, 0, chrono.LocalDateTimeOf(2020, chrono.March, 18, 0, 0, 0, 0)},
{"add years", chrono.LocalDateTimeOf(2020, chrono.March, 18, 0, 0, 0, 0), 105, 0, 0, chrono.LocalDateTimeOf(2125, chrono.March, 18, 0, 0, 0, 0)},
{"sub years", chrono.LocalDateTimeOf(2020, chrono.March, 18, 0, 0, 0, 0), -280, 0, 0, chrono.LocalDateTimeOf(1740, chrono.March, 18, 0, 0, 0, 0)},
{"add months", chrono.LocalDateTimeOf(2020, chrono.March, 18, 0, 0, 0, 0), 0, 6, 0, chrono.LocalDateTimeOf(2020, chrono.September, 18, 0, 0, 0, 0)},
{"sub months", chrono.LocalDateTimeOf(2020, chrono.March, 18, 0, 0, 0, 0), 0, -2, 0, chrono.LocalDateTimeOf(2020, chrono.January, 18, 0, 0, 0, 0)},
{"add days", chrono.LocalDateTimeOf(2020, chrono.March, 18, 0, 0, 0, 0), 0, 0, 8, chrono.LocalDateTimeOf(2020, chrono.March, 26, 0, 0, 0, 0)},
{"sub days", chrono.LocalDateTimeOf(2020, chrono.March, 18, 0, 0, 0, 0), 0, 0, -15, chrono.LocalDateTimeOf(2020, chrono.March, 3, 0, 0, 0, 0)},
{"time package example", chrono.LocalDateTimeOf(2011, chrono.January, 1, 0, 0, 0, 0), -1, 2, 3, chrono.LocalDateTimeOf(2010, chrono.March, 4, 0, 0, 0, 0)},
{"normalized time package example", chrono.LocalDateTimeOf(2011, chrono.October, 31, 0, 0, 0, 0), 0, 1, 0, chrono.LocalDateTimeOf(2011, chrono.December, 1, 0, 0, 0, 0)},
{"wrap around day", chrono.LocalDateTimeOf(2020, chrono.March, 18, 0, 0, 0, 0), 0, 0, 20, chrono.LocalDateTimeOf(2020, chrono.April, 7, 0, 0, 0, 0)},
} {
t.Run(tt.name, func(t *testing.T) {
if ok := tt.datetime.CanAddDate(tt.addYears, tt.addMonths, tt.addDays); !ok {
t.Errorf("date = %s, date.CanAddDate(%d, %d, %d) = false, want true", tt.datetime, tt.addYears, tt.addMonths, tt.addDays)
}
if date := tt.datetime.AddDate(tt.addYears, tt.addMonths, tt.addDays); date.Compare(tt.expected) != 0 {
t.Errorf("date = %s, date.AddDate(%d, %d, %d) = %s, want %s", tt.datetime, tt.addYears, tt.addMonths, tt.addDays, date, tt.expected)
}
})
}
for _, tt := range []struct {
name string
datetime chrono.LocalDateTime
addDays int
}{
{"underflow", chrono.MinLocalDateTime(), -1},
{"overflow", chrono.MaxLocalDateTime(), 1},
} {
t.Run(tt.name, func(t *testing.T) {
if ok := tt.datetime.CanAddDate(0, 0, tt.addDays); ok {
t.Errorf("date = %s, date.CanAddDate(0, 0, %d) = true, want false", tt.datetime, tt.addDays)
}
func() {
defer func() {
if r := recover(); r == nil {
t.Error("expecting panic that didn't occur")
}
}()
tt.datetime.AddDate(0, 0, tt.addDays)
}()
})
}
}
func TestLocalDateTime_Sub(t *testing.T) {
for _, tt := range []struct {
dt1 chrono.LocalDateTime
dt2 chrono.LocalDateTime
diff chrono.Duration
}{
{
chrono.LocalDateTimeOf(2020, chrono.January, 5, 12, 0, 0, 0),
chrono.LocalDateTimeOf(2020, chrono.January, 3, 6, 0, 0, 0),
chrono.DurationOf(54 * chrono.Hour),
},
{
chrono.LocalDateTimeOf(2020, chrono.January, 5, 12, 0, 0, 22),
chrono.LocalDateTimeOf(2020, chrono.January, 5, 12, 0, 0, 40),
chrono.DurationOf(-18 * chrono.Nanosecond),
},
} {
t.Run(fmt.Sprintf("%s - %s", tt.dt1, tt.dt2), func(t *testing.T) {
if d := tt.dt1.Sub(tt.dt2); d.Compare(tt.diff) != 0 {
t.Errorf("dt1.Sub(dt2) = %v, want %v", d, tt.diff)
}
})
}
}
func TestLocalDateTime_In(t *testing.T) {
dt := chrono.LocalDateTimeOf(2020, chrono.March, 18, 12, 30, 0, 0)
output := dt.In(chrono.OffsetOf(2, 30))
expected := chrono.OffsetDateTimeOf(2020, chrono.March, 18, 12, 30, 0, 0, 2, 30)
if output.Compare(expected) != 0 {
t.Errorf("dt.In = %s, want %s", output, expected)
}
}
func TestLocalDateTime_UTC(t *testing.T) {
dt := chrono.LocalDateTimeOf(2020, chrono.March, 18, 12, 30, 0, 0)
output := dt.UTC()
expected := chrono.OffsetDateTimeOf(2020, chrono.March, 18, 12, 30, 0, 0, 0, 0)
if output.Compare(expected) != 0 {
t.Errorf("dt.UTC() = %s, want %s", output, expected)
}
}