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package excelize

import (
	"testing"
	"time"
)

type dateTest struct {
	ExcelValue float64
	GoValue    time.Time
}

func TestTimeToExcelTime(t *testing.T) {
	trueExpectedInputList := []dateTest{
		{0.0, time.Date(1899, 12, 30, 0, 0, 0, 0, time.UTC)},
		{25569.0, time.Unix(0, 0)},
		{43269.0, time.Date(2018, 6, 18, 0, 0, 0, 0, time.UTC)},
		{401769.0, time.Date(3000, 1, 1, 0, 0, 0, 0, time.UTC)},
	}

	for _, test := range trueExpectedInputList {
		if test.ExcelValue != timeToExcelTime(test.GoValue) {
			t.Fatalf("Expected %v from %v = true, got %v\n", test.ExcelValue, test.GoValue, timeToExcelTime(test.GoValue))
		}
	}
}

func TestTimeFromExcelTime(t *testing.T) {
	trueExpectedInputList := []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)},
		{401769.0, time.Date(3000, 1, 1, 0, 0, 0, 0, time.UTC)},
	}

	for _, test := range trueExpectedInputList {
		if test.GoValue != timeFromExcelTime(test.ExcelValue, false) {
			t.Fatalf("Expected %v from %v = true, got %v\n", test.GoValue, test.ExcelValue, timeFromExcelTime(test.ExcelValue, false))
		}
	}
}