53 lines
1 KiB
Go
53 lines
1 KiB
Go
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package isoweek_test
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import (
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"fmt"
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"testing"
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"time"
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"dynatron.me/x/stillbox/internal/isoweek"
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)
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func TestJulianToDate(test *testing.T) {
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j := isoweek.DateToJulian(1, time.January, 1)
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for {
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y, m, d := isoweek.JulianToDate(j)
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if y >= 4000 {
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break
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}
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if j != isoweek.DateToJulian(y, m, d) {
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test.Errorf("mismatch on %04d-%02d-%02d", y, m, d)
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}
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j++
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}
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}
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func TestDateToJulian(test *testing.T) {
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t := time.Date(1, time.January, 1, 0, 0, 0, 0, time.UTC)
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for t.Year() < 4000 {
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j := isoweek.DateToJulian(t.Date())
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y, m, d := isoweek.JulianToDate(j)
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if y != t.Year() || m != t.Month() || d != t.Day() {
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test.Errorf("mismatch on %s", t.Format("2006-01-02"))
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}
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if j+1 != isoweek.DateToJulian(y, m, d+1) {
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test.Errorf("mismatch 2 on %s", t.Format("2006-01-02"))
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}
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t = t.AddDate(0, 0, 1)
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}
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}
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func ExampleDateToJulian() {
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fmt.Println(isoweek.DateToJulian(2006, 1, 2))
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// Output: 2453738
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}
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func ExampleJulianToDate() {
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fmt.Println(isoweek.JulianToDate(2453738))
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// Output: 2006 January 2
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}
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