83 lines
3.2 KiB
Go
83 lines
3.2 KiB
Go
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package basic
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import (
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"testing"
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"time"
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)
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// 稠密星历表必须被接受并覆盖完整的路径搜索窗口，否则路径样本会静默退回精确星历。
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func TestDenseOccultationTableCoversPathSearchWindow(t *testing.T) {
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center := occultationTimeToTT(time.Date(2025, time.January, 5, 12, 0, 0, 0, time.UTC))
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const toleranceDays = 1e-9
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for _, planet := range []OccultationPlanet{
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OccultationMercury, OccultationVenus, OccultationMars, OccultationJupiter,
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OccultationSaturn, OccultationUranus, OccultationNeptune,
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} {
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config, ok := planetOccultationConfigFor(planet)
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if !ok {
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t.Fatalf("%s occultation config is unavailable", planet)
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}
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cache := newPlanetOccultationEventCache(config)
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cache.preparePathEphemeris(center, OccultationPathAlgorithmOptimized)
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if !cache.local.dense {
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t.Fatalf("%s dense path table was rejected", planet)
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}
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nodes := cache.local.nodes
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if len(nodes) < 2 {
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t.Fatalf("%s dense path table has %d nodes", planet, len(nodes))
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}
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if first := center - occultationPathSearchSpanDays; nodes[0].tt > first+toleranceDays {
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t.Fatalf("%s dense table starts at %.9f, want at most %.9f", planet, nodes[0].tt, first)
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}
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if last := center + occultationPathSearchSpanDays; nodes[len(nodes)-1].tt < last-toleranceDays {
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t.Fatalf("%s dense table ends at %.9f, want at least %.9f", planet, nodes[len(nodes)-1].tt, last)
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}
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// 节点时刻是 JD 浮点相加的结果，相邻差只近似等于步长（约 1e-10 天）。
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if step := nodes[1].tt - nodes[0].tt; step < occultationDenseEphemerisStepDays-1e-8 ||
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step > occultationDenseEphemerisStepDays+1e-8 {
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t.Fatalf("%s dense table step=%g, want %g", planet, step, occultationDenseEphemerisStepDays)
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}
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}
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}
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func BenchmarkOccultationPlanetPathsMars20250729(b *testing.B) {
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zone := time.FixedZone("UTC+8", 8*3600)
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start := time.Date(2025, time.July, 29, 0, 0, 0, 0, zone)
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options := OccultationPathOptions{
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Step: 20 * time.Minute, TargetSpacingKM: 900, RiseSetStep: time.Minute,
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DisableFootprints: true, IncludeFootprintTimeline: true, FootprintTimelineStep: 5 * time.Minute,
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}
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b.ReportAllocs()
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b.ResetTimer()
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for index := 0; index < b.N; index++ {
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paths, err := FindPlanetOccultationPaths(start, start.Add(24*time.Hour), OccultationMars, options)
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if err != nil || len(paths) != 1 {
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b.Fatalf("paths=%d err=%v", len(paths), err)
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}
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}
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}
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func BenchmarkOccultationPlanetPathsSaturnDefault(b *testing.B) {
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start := time.Date(2024, time.August, 21, 0, 0, 0, 0, time.UTC)
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b.ReportAllocs()
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b.ResetTimer()
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for index := 0; index < b.N; index++ {
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paths, err := FindPlanetOccultationPaths(start, start.Add(24*time.Hour), OccultationSaturn, OccultationPathOptions{})
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if err != nil || len(paths) != 1 {
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b.Fatalf("paths=%d err=%v", len(paths), err)
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}
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}
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}
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func BenchmarkOccultationPathLimitsAndWidth(b *testing.B) {
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config, _ := planetOccultationConfigFor(OccultationSaturn)
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cache := newPlanetOccultationEventCache(config)
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tt := occultationTimeToTT(time.Date(2025, time.January, 5, 4, 0, 0, 0, time.UTC))
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cache.preparePathEphemeris(tt, OccultationPathAlgorithmOptimized)
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b.ReportAllocs()
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b.ResetTimer()
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for index := 0; index < b.N; index++ {
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_, _, _, _ = occultationPathLimitsAndWidthForFrame(tt, cache.outerFrameAt)
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}
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}
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