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package time
import (
"math"
"strconv"
"testing"
"time"
)
func TestDateTime(t *testing.T) {
cases := map[string]struct {
TimeString string
TimeValue time.Time
SymmetricString bool
}{
"no offset": {
TimeString: "1985-04-12T23:20:50.52Z",
TimeValue: time.Date(1985, 4, 12, 23, 20, 50, int(520*time.Millisecond),
time.UTC),
SymmetricString: true,
},
"no offset, no Z": {
TimeString: "1985-04-12T23:20:50.524",
TimeValue: time.Date(1985, 4, 12, 23, 20, 50, int(524*time.Millisecond),
time.UTC),
SymmetricString: false,
},
"with negative offset": {
TimeString: "1985-04-12T23:20:50.52-07:00",
TimeValue: time.Date(1985, 4, 12, 23, 20, 50, int(520*time.Millisecond),
time.FixedZone("-0700", -7*60*60)),
SymmetricString: false,
},
"with positive offset": {
TimeString: "1985-04-12T23:20:50.52+07:00",
TimeValue: time.Date(1985, 4, 12, 23, 20, 50, int(520*time.Millisecond),
time.FixedZone("-0700", +7*60*60)),
SymmetricString: false,
},
"UTC serialize": {
TimeString: "1985-04-13T06:20:50.52Z",
TimeValue: time.Date(1985, 4, 12, 23, 20, 50, int(520*time.Millisecond),
time.FixedZone("-0700", -7*60*60)),
SymmetricString: true,
},
}
for name, c := range cases {
t.Run(name, func(t *testing.T) {
formattedTimeValue := FormatDateTime(c.TimeValue)
// Round Trip time value ensure format and parse are compatible.
parsedTimeValue, err := ParseDateTime(formattedTimeValue)
if err != nil {
t.Fatalf("expected no error, got %v", err)
}
parsedTimeString, err := ParseDateTime(c.TimeString)
if err != nil {
t.Fatalf("expected no error, got %v", err)
}
// Ensure parsing date time from string matches expected time value.
if c.SymmetricString {
if e, a := c.TimeString, formattedTimeValue; e != a {
t.Errorf("expected %v, got %v", e, a)
}
}
if e, a := c.TimeValue, parsedTimeValue; !e.Equal(a) {
t.Errorf("expected %v, got %v", e, a)
}
if e, a := c.TimeValue, parsedTimeString; !e.Equal(a) {
t.Errorf("expected %v, got %v", e, a)
}
})
}
}
func TestHTTPDate(t *testing.T) {
refTime := time.Date(2014, 4, 29, 18, 30, 38, 0, time.UTC)
httpDate := FormatHTTPDate(refTime)
if e, a := "Tue, 29 Apr 2014 18:30:38 GMT", httpDate; e != a {
t.Errorf("expected %v, got %v", e, a)
}
parseTime, err := ParseHTTPDate(httpDate)
if err != nil {
t.Fatalf("expected no error, got %v", err)
}
if e, a := refTime, parseTime; !e.Equal(a) {
t.Errorf("expected %v, got %v", e, a)
}
// UTC serialize date time.
refTime = time.Date(2014, 4, 29, 18, 30, 38, 0, time.FixedZone("-700", -7*60*60))
httpDate = FormatHTTPDate(refTime)
if e, a := "Wed, 30 Apr 2014 01:30:38 GMT", httpDate; e != a {
t.Errorf("expected %v, got %v", e, a)
}
}
func TestParseHTTPDate(t *testing.T) {
cases := map[string]struct {
date string
expect time.Time
wantErr bool
}{
"with leading zero on day": {
date: "Fri, 05 Feb 2021 19:12:15 GMT",
expect: time.Date(2021, 2, 5, 19, 12, 15, 0, time.UTC),
},
"without leading zero on day": {
date: "Fri, 5 Feb 2021 19:12:15 GMT",
expect: time.Date(2021, 2, 5, 19, 12, 15, 0, time.UTC),
},
"with double digit day": {
date: "Fri, 15 Feb 2021 19:12:15 GMT",
expect: time.Date(2021, 2, 15, 19, 12, 15, 0, time.UTC),
},
"RFC850": {
date: "Friday, 05-Feb-21 19:12:15 UTC",
expect: time.Date(2021, 2, 5, 19, 12, 15, 0, time.UTC),
},
"ANSIC with leading zero on day": {
date: "Fri Feb 05 19:12:15 2021",
expect: time.Date(2021, 2, 5, 19, 12, 15, 0, time.UTC),
},
"ANSIC without leading zero on day": {
date: "Fri Feb 5 19:12:15 2021",
expect: time.Date(2021, 2, 5, 19, 12, 15, 0, time.UTC),
},
"ANSIC with double digit day": {
date: "Fri Feb 15 19:12:15 2021",
expect: time.Date(2021, 2, 15, 19, 12, 15, 0, time.UTC),
},
"invalid time format": {
date: "1985-04-12T23:20:50.52Z",
wantErr: true,
},
"shortened year with double digit day": {
date: "Thu, 11 Feb 21 11:04:03 GMT",
expect: time.Date(2021, 2, 11, 11, 04, 03, 0, time.UTC),
},
"shortened year without leading zero day": {
date: "Thu, 5 Feb 21 11:04:03 GMT",
expect: time.Date(2021, 2, 5, 11, 04, 03, 0, time.UTC),
},
"shortened year with leading zero day": {
date: "Thu, 05 Feb 21 11:04:03 GMT",
expect: time.Date(2021, 2, 5, 11, 04, 03, 0, time.UTC),
},
}
for name, tt := range cases {
t.Run(name, func(t *testing.T) {
result, err := ParseHTTPDate(tt.date)
if (err != nil) != tt.wantErr {
t.Fatalf("error = %v, wantErr = %v", err, tt.wantErr)
}
if err != nil {
return
}
if result.IsZero() {
t.Fatalf("expected non-zero timestamp")
}
if tt.expect != result {
t.Fatalf("expected %q, got %q", tt.expect, result)
}
})
}
}
func TestEpochSeconds(t *testing.T) {
cases := []struct {
reference time.Time
expectedUnix float64
expectedTime time.Time
}{
{
reference: time.Date(2018, 1, 9, 20, 51, 21, 123399936, time.UTC),
expectedUnix: 1515531081.123,
expectedTime: time.Date(2018, 1, 9, 20, 51, 21, 1.23e8, time.UTC),
},
{
reference: time.Date(2018, 1, 9, 20, 51, 21, 1e8, time.UTC),
expectedUnix: 1515531081.1,
expectedTime: time.Date(2018, 1, 9, 20, 51, 21, 1e8, time.UTC),
},
{
reference: time.Date(2018, 1, 9, 20, 51, 21, 123567891, time.UTC),
expectedUnix: 1515531081.123,
expectedTime: time.Date(2018, 1, 9, 20, 51, 21, 1.23e8, time.UTC),
},
{
reference: time.Unix(0, math.MaxInt64).UTC(),
expectedUnix: 9223372036.854,
expectedTime: time.Date(2262, 04, 11, 23, 47, 16, 8.54e8, time.UTC),
},
{
reference: time.Date(2018, 1, 9, 20, 51, 21, 123567891, time.FixedZone("-0700", -7*60*60)),
expectedUnix: 1515556281.123,
expectedTime: time.Date(2018, 1, 10, 03, 51, 21, 1.23e8, time.UTC),
},
}
for i, tt := range cases {
t.Run(strconv.Itoa(i), func(t *testing.T) {
epochSeconds := FormatEpochSeconds(tt.reference)
if e, a := tt.expectedUnix, epochSeconds; e != a {
t.Errorf("expected %v, got %v", e, a)
}
parseTime := ParseEpochSeconds(epochSeconds)
if e, a := tt.expectedTime, parseTime; !e.Equal(a) {
t.Errorf("expected %v, got %v", e, a)
}
})
}
// Check an additional edge that higher precision values are truncated to milliseconds
if e, a := time.Date(2018, 1, 9, 20, 51, 21, 1.23e8, time.UTC), ParseEpochSeconds(1515531081.12356); !e.Equal(a) {
t.Errorf("expected %v, got %v", e, a)
}
}
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