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package excelize
import (
"fmt"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
type dateTest struct {
ExcelValue float64
GoValue time.Time
}
var trueExpectedDateList = []dateTest{
{0.0000000000000000, time.Date(1899, time.December, 30, 0, 0, 0, 0, time.UTC)},
{25569.000000000000, time.Unix(0, 0).UTC()},
// Expected values extracted from real spreadsheet
{1.0000000000000000, time.Date(1900, time.January, 1, 0, 0, 0, 0, time.UTC)},
{1.0000115740740740, time.Date(1900, time.January, 1, 0, 0, 1, 0, time.UTC)},
{1.0006944444444446, time.Date(1900, time.January, 1, 0, 1, 0, 0, time.UTC)},
{1.0416666666666667, time.Date(1900, time.January, 1, 1, 0, 0, 0, time.UTC)},
{2.0000000000000000, time.Date(1900, time.January, 2, 0, 0, 0, 0, time.UTC)},
{43269.000000000000, time.Date(2018, time.June, 18, 0, 0, 0, 0, time.UTC)},
{43542.611111111109, time.Date(2019, time.March, 18, 14, 40, 0, 0, time.UTC)},
{401769.00000000000, time.Date(3000, time.January, 1, 0, 0, 0, 0, time.UTC)},
}
var excelTimeInputList = []dateTest{
{0.0, time.Date(1899, 12, 30, 0, 0, 0, 0, time.UTC)},
{60.0, time.Date(1900, 2, 28, 0, 0, 0, 0, time.UTC)},
{61.0, time.Date(1900, 3, 1, 0, 0, 0, 0, time.UTC)},
{41275.0, time.Date(2013, 1, 1, 0, 0, 0, 0, time.UTC)},
{44450.3333333333, time.Date(2021, time.September, 11, 8, 0, 0, 0, time.UTC)},
{401769.0, time.Date(3000, 1, 1, 0, 0, 0, 0, time.UTC)},
}
func TestTimeToExcelTime(t *testing.T) {
for i, test := range trueExpectedDateList {
t.Run(fmt.Sprintf("TestData%d", i+1), func(t *testing.T) {
excelTime, err := timeToExcelTime(test.GoValue, false)
assert.NoError(t, err)
assert.Equalf(t, test.ExcelValue, excelTime,
"Time: %s", test.GoValue.String())
})
}
}
func TestTimeToExcelTime_Timezone(t *testing.T) {
location, err := time.LoadLocation("America/Los_Angeles")
if !assert.NoError(t, err) {
t.FailNow()
}
for i, test := range trueExpectedDateList {
t.Run(fmt.Sprintf("TestData%d", i+1), func(t *testing.T) {
_, err := timeToExcelTime(test.GoValue.In(location), false)
assert.NoError(t, err)
})
}
}
func TestTimeFromExcelTime(t *testing.T) {
for i, test := range excelTimeInputList {
t.Run(fmt.Sprintf("TestData%d", i+1), func(t *testing.T) {
assert.Equal(t, test.GoValue, timeFromExcelTime(test.ExcelValue, false))
})
}
for hour := 0; hour < 24; hour++ {
for min := 0; min < 60; min++ {
for sec := 0; sec < 60; sec++ {
date := time.Date(2021, time.December, 30, hour, min, sec, 0, time.UTC)
// Test use 1900 date system
excel1900Time, err := timeToExcelTime(date, false)
assert.NoError(t, err)
date1900Out := timeFromExcelTime(excel1900Time, false)
assert.EqualValues(t, hour, date1900Out.Hour())
assert.EqualValues(t, min, date1900Out.Minute())
assert.EqualValues(t, sec, date1900Out.Second())
// Test use 1904 date system
excel1904Time, err := timeToExcelTime(date, true)
assert.NoError(t, err)
date1904Out := timeFromExcelTime(excel1904Time, true)
assert.EqualValues(t, hour, date1904Out.Hour())
assert.EqualValues(t, min, date1904Out.Minute())
assert.EqualValues(t, sec, date1904Out.Second())
}
}
}
}
func TestTimeFromExcelTime_1904(t *testing.T) {
julianDays, julianFraction := shiftJulianToNoon(1, -0.6)
assert.Equal(t, julianDays, 0.0)
assert.Equal(t, julianFraction, 0.9)
julianDays, julianFraction = shiftJulianToNoon(1, 0.1)
assert.Equal(t, julianDays, 1.0)
assert.Equal(t, julianFraction, 0.6)
assert.Equal(t, timeFromExcelTime(61, true), time.Date(1904, time.March, 2, 0, 0, 0, 0, time.UTC))
assert.Equal(t, timeFromExcelTime(62, true), time.Date(1904, time.March, 3, 0, 0, 0, 0, time.UTC))
}
func TestExcelDateToTime(t *testing.T) {
// Check normal case
for i, test := range excelTimeInputList {
t.Run(fmt.Sprintf("TestData%d", i+1), func(t *testing.T) {
timeValue, err := ExcelDateToTime(test.ExcelValue, false)
assert.Equal(t, test.GoValue, timeValue)
assert.NoError(t, err)
})
}
// Check error case
_, err := ExcelDateToTime(-1, false)
assert.EqualError(t, err, newInvalidExcelDateError(-1).Error())
}
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