88 lines
2.8 KiB
Go
88 lines
2.8 KiB
Go
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package basic
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import (
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"errors"
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"math"
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"testing"
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)
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// 本文件钉住月出/月落「缺失事件」的口径：错误名描述缺失的那个现象，不描述被问的事件。
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func moonRiseSetErrorMatches(got, want error) bool {
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if want == nil {
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return got == nil
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}
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return errors.Is(got, want)
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}
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func moonRiseSetDailyGeometry(jd, lon, lat, tz float64) (aboveAll, belowAll bool) {
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dayStart := math.Floor(jd) + 0.5
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aboveAll, belowAll = true, true
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previous := moonRiseSetResidual(dayStart, lon, lat, tz, 1, 0, -1)
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for i := 1; i <= 288; i++ {
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current := moonRiseSetResidual(dayStart+float64(i)/288.0, lon, lat, tz, 1, 0, -1)
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if previous <= 0 || current <= 0 {
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aboveAll = false
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}
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if previous >= 0 || current >= 0 {
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belowAll = false
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}
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previous = current
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}
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return aboveAll, belowAll
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}
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func TestMoonRiseSetMissingEventConvention(t *testing.T) {
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cases := []struct {
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name string
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jd float64
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lon, lat, tz float64
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riseErr, setErr error
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}{
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{"极昼：全天在地平线上", JDECalc(2023, 6, 21), 0, 85, 0, ErrNeverSet, ErrNeverSet},
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{"极夜：全天在地平线下", JDECalc(2023, 12, 22), 0, -85, 0, ErrNeverRise, ErrNeverRise},
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{"当日无升起但别日有", JDECalc(2024, 2, 29), 0, 60, 0, ErrNotOnThisDate, nil},
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{"正常日两侧都有", JDECalc(2025, 6, 5), 116.4074, 39.9042, 8, nil, nil},
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}
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for _, tc := range cases {
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t.Run(tc.name, func(t *testing.T) {
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if _, err := GetMoonRiseTime(tc.jd, tc.lon, tc.lat, tc.tz, 1, 0); !moonRiseSetErrorMatches(err, tc.riseErr) {
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t.Fatalf("GetMoonRiseTime error = %v, want %v", err, tc.riseErr)
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}
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if _, err := GetMoonSetTime(tc.jd, tc.lon, tc.lat, tc.tz, 1, 0); !moonRiseSetErrorMatches(err, tc.setErr) {
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t.Fatalf("GetMoonSetTime error = %v, want %v", err, tc.setErr)
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}
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})
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}
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}
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func TestMoonRiseSetMissingEventMatchesDailyGeometry(t *testing.T) {
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dates := []float64{
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JDECalc(2023, 6, 21), JDECalc(2023, 12, 22), JDECalc(2024, 2, 29),
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JDECalc(2025, 6, 21), JDECalc(2025, 12, 22), JDECalc(2026, 3, 3),
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}
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latitudes := []float64{-89, -85, -75, -66, -60, 60, 66, 75, 85, 89}
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for _, jd := range dates {
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for _, lat := range latitudes {
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aboveAll, belowAll := moonRiseSetDailyGeometry(jd, 0, lat, 0)
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if !aboveAll && !belowAll {
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continue
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}
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_, riseErr := GetMoonRiseTime(jd, 0, lat, 0, 1, 0)
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_, setErr := GetMoonSetTime(jd, 0, lat, 0, 1, 0)
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want := ErrNeverSet
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if belowAll {
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want = ErrNeverRise
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}
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if !moonRiseSetErrorMatches(riseErr, want) {
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t.Fatalf("lat %v jd %.1f aboveAll=%v belowAll=%v: moonrise error = %v, want %v",
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lat, jd, aboveAll, belowAll, riseErr, want)
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}
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if !moonRiseSetErrorMatches(setErr, want) {
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t.Fatalf("lat %v jd %.1f aboveAll=%v belowAll=%v: moonset error = %v, want %v",
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lat, jd, aboveAll, belowAll, setErr, want)
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}
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}
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}
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}
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