77 lines
2.8 KiB
Go
77 lines
2.8 KiB
Go
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package svg
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import (
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"strings"
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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/moon"
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)
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type constantLimb float64
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func (r constantLimb) LimbRadiusKM(_, _, _ float64) (float64, bool) { return float64(r), true }
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type failingLimb struct{}
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func (failingLimb) LimbRadiusKM(_, _, _ float64) (float64, bool) { return 0, false }
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func TestLocalOccultationSVGAcceptsCustomLimbAndRejectsFailedLimbFlag(t *testing.T) {
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start := time.Date(2034, time.November, 21, 0, 0, 0, 0, time.UTC)
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end := time.Date(2034, time.November, 23, 0, 0, 0, 0, time.UTC)
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find := func(profile basic.LunarLimb) moon.PlanetOccultationInfo {
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t.Helper()
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events, err := moon.FindPlanetOccultations(start, end, moon.OccultationJupiter,
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-42.36358358336173, 21.762064240049245, 0, moon.OccultationSearchOptions{LunarLimb: profile})
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if err != nil || len(events) != 1 {
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t.Fatalf("FindPlanetOccultations() = %d events, %v; want one", len(events), err)
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}
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return events[0]
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}
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circular := find(nil)
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custom := find(constantLimb(1750))
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if !custom.LunarLimbApplied {
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t.Fatal("constant 1750 km limb: LunarLimbApplied = false, want true")
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}
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if custom.ExternalImmersion.Equal(circular.ExternalImmersion) {
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t.Fatal("constant 1750 km limb did not move the contact")
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}
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diagram, err := LocalPlanetOccultationSVG(custom, LocalPlanetOccultationSVGOptions{Location: time.UTC})
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if err != nil {
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t.Fatalf("LocalPlanetOccultationSVG(custom limb) error = %v", err)
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}
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if !strings.Contains(diagram, "月缘剖面") {
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t.Fatal("custom limb chart does not declare the limb profile")
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}
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failed := find(failingLimb{})
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if failed.LunarLimbApplied {
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t.Fatal("failing limb: LunarLimbApplied = true, want false")
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}
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if !failed.ExternalImmersion.Equal(circular.ExternalImmersion) || !failed.InternalEmersion.Equal(circular.InternalEmersion) {
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t.Fatal("failing limb changed the circular contacts")
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}
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diagram, err = LocalPlanetOccultationSVG(failed, LocalPlanetOccultationSVGOptions{Location: time.UTC})
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if err != nil {
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t.Fatalf("LocalPlanetOccultationSVG(failed limb) error = %v", err)
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}
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if strings.Contains(diagram, "月缘剖面") || !strings.Contains(diagram, "圆月面") {
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t.Fatal("failed limb chart must declare the circular limb")
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}
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}
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func TestOccultationPathLimbFlagRequiresCorrectedLimit(t *testing.T) {
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start := time.Date(2034, time.November, 21, 0, 0, 0, 0, time.UTC)
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end := time.Date(2034, time.November, 23, 0, 0, 0, 0, time.UTC)
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paths, err := moon.FindPlanetOccultationPaths(start, end, moon.OccultationJupiter,
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moon.OccultationPathOptions{Step: 10 * time.Minute, TargetSpacingKM: 400, LunarLimb: failingLimb{}})
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if err != nil || len(paths) != 1 {
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t.Fatalf("FindPlanetOccultationPaths() = %d paths, %v; want one", len(paths), err)
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}
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if paths[0].LunarLimbApplied {
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t.Fatal("failing limb: path LunarLimbApplied = true, want false")
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}
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}
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