40 lines
939 B
Go
40 lines
939 B
Go
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package internal
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import (
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"math"
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"testing"
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"time"
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)
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func TestDateJulianRoundTrip(t *testing.T) {
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cases := []struct {
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date time.Time
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jd float64
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}{
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{time.Date(2026, 10, 6, 8, 30, 15, 123000000, time.UTC), 2461319.8543417014},
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{time.Date(1582, 10, 4, 0, 0, 0, 0, time.UTC), 2299159.5},
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{time.Date(1582, 10, 15, 0, 0, 0, 0, time.UTC), 2299160.5},
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}
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for _, tc := range cases {
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if got := Date2JD(tc.date); math.Abs(got-tc.jd) > 1e-9 {
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t.Fatalf("Date2JD(%s) = %.12f, want %.12f", tc.date, got, tc.jd)
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}
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}
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}
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func TestJD2DateByZone(t *testing.T) {
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zone := time.FixedZone("CST", 8*3600)
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got := JD2DateByZone(2461320.5, zone, false)
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want := time.Date(2026, 10, 7, 8, 0, 0, 0, zone)
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if !got.Equal(want) {
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t.Fatalf("JD2DateByZone = %s, want %s", got, want)
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}
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}
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func TestUTC2UT1IgnoresDUT1(t *testing.T) {
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jd := 2461320.5
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if got := UTC2UT1(jd); got != jd {
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t.Fatalf("UTC2UT1 = %.12f, want %.12f", got, jd)
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}
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}
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