60 lines
2.1 KiB
Go
60 lines
2.1 KiB
Go
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package occultationgeo
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import (
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"testing"
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"time"
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"b612.me/astro/internal/geodata"
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"b612.me/astro/moon"
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)
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func TestMars20250729TotalBandAvoidsDetachedSliver(t *testing.T) {
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zone := time.FixedZone("UTC+8", 8*60*60)
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start := time.Date(2025, time.July, 29, 0, 0, 0, 0, zone)
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paths, err := moon.FindPlanetOccultationPaths(
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start, start.Add(24*time.Hour), moon.OccultationMars,
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moon.OccultationPathOptions{
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Step: 20 * time.Minute, TargetSpacingKM: 900, RiseSetStep: time.Minute,
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DisableFootprints: true, IncludeFootprintTimeline: true,
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FootprintTimelineStep: 5 * time.Minute,
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},
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)
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if err != nil {
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t.Fatalf("FindPlanetOccultationPaths: %v", err)
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}
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if len(paths) != 1 {
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t.Fatalf("paths=%d", len(paths))
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}
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path := paths[0]
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polygons, authoritative, err := VisibleTotalBandPolygonsFromContours(
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path.TotalBandFootprints, path.TotalBandContours,
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path.NorthernTotalLimit, path.SouthernTotalLimit, path.TotalRiseSetCurves,
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)
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if err != nil {
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t.Fatalf("VisibleTotalBandPolygonsFromContours: %v", err)
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}
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if !authoritative {
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t.Fatal("total band should be authoritative for contour-driven Mars path")
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}
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if len(polygons) != 1 {
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t.Fatalf("total-band polygons=%d, want one merged face", len(polygons))
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}
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for _, test := range []struct {
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name string
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probe geodata.GeoPoint
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inside bool
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}{
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// This point was previously rejected by the phase-cycle envelope, but it
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// lies inside the horizon-closed total footprint during the event. The
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// static band now represents the full time union, so it must remain.
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{name: "visible-sweep", probe: geodata.GeoPoint{Longitude: -129.8230, Latitude: -77.4030}, inside: true},
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{name: "selected-west", probe: geodata.GeoPoint{Longitude: -134.6060, Latitude: -78.5601}, inside: true},
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{name: "selected-center", probe: geodata.GeoPoint{Longitude: -134.2300, Latitude: -78.0725}, inside: true},
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} {
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inside := geodata.SphericalPolygonsContainPoints(polygons, []geodata.GeoPoint{test.probe})[0]
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if inside != test.inside {
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t.Fatalf("merged total-band probe %s (%.4f, %.4f) inside=%v, want %v", test.name, test.probe.Longitude, test.probe.Latitude, inside, test.inside)
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}
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}
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}
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