71 lines
2.6 KiB
Go
71 lines
2.6 KiB
Go
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package geojson_test
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import (
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"encoding/json"
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"testing"
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"time"
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"b612.me/astro/basic"
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"b612.me/astro/geojson"
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"b612.me/astro/moon"
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)
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func TestMarshalStarOccultationRegulus20261007UsesAnalyticVisibleEnvelope(t *testing.T) {
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if err := basic.LoadStarData(); err != nil {
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t.Fatal(err)
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}
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starData, err := basic.StarDataByHR(3982)
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if err != nil {
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t.Fatal(err)
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}
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star, err := moon.StarCoordinateFromStarData(starData)
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if err != nil {
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t.Fatal(err)
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}
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start := time.Date(2026, time.October, 7, 0, 0, 0, 0, time.UTC)
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paths, err := moon.FindStarOccultationPaths(start, start.Add(24*time.Hour), star, moon.OccultationPathOptions{})
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if err != nil || len(paths) != 1 {
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t.Fatalf("FindStarOccultationPaths() paths=%d err=%v, want one", len(paths), err)
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}
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path := paths[0]
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if len(path.Footprints) == 0 || len(path.BandFootprints) != 0 {
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t.Fatalf("dense path footprints=%d bandFootprints=%d, want dense mode", len(path.Footprints), len(path.BandFootprints))
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}
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data, err := geojson.MarshalStarOccultation(path)
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if err != nil {
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t.Fatalf("MarshalStarOccultation: %v", err)
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}
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collection := decodeCollection(t, data)
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band := featureWithRole(t, collection, "occultation-band")
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if authoritative, ok := band.Properties["static_band_authoritative"].(bool); !ok || !authoritative {
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t.Fatalf("occultation-band source=%v authoritative=%v, want analytic authoritative boundary",
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band.Properties["source"], band.Properties["static_band_authoritative"])
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}
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if source := band.Properties["source"]; source != "visible-footprint-sweep" {
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t.Fatalf("occultation-band source=%v, want visible-footprint-sweep", source)
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}
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assertClosedMultiPolygon(t, band)
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if rings := geoJSONMultiPolygonOuterRings(t, band); len(rings) != 1 {
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t.Fatalf("occultation-band polygons=%d, want one continuous visible band", len(rings))
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}
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assertOccultationBandMaximumEdge(t, band, 45)
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for _, feature := range featuresWithRole(collection, "visibility-boundary") {
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var lines [][][]float64
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if err := json.Unmarshal(feature.Geometry.Coordinates, &lines); err != nil {
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t.Fatalf("decode visibility-boundary: %v", err)
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}
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for lineIndex, line := range lines {
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for pointIndex, point := range line {
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if len(point) < 2 || !geometryContainsPointWithinKM(t, band.Geometry, point[0], point[1], 2) {
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t.Fatalf("visibility-boundary line %d point %d lies outside visible band at %.6f, %.6f", lineIndex, pointIndex, point[0], point[1])
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}
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}
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}
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}
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for index, point := range path.CenterLine {
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if !geometryContainsPoint(t, band.Geometry, point.Longitude, point.Latitude) {
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t.Fatalf("center-line sample %d lies outside visible band at %.6f, %.6f", index, point.Longitude, point.Latitude)
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}
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}
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}
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